Powered by Deep Web Technologies
Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Indoor Radon and Its Decay Products: Concentrations, Causes, and Control Strategies  

E-Print Network (OSTI)

Radon and Its Decay Products in Indoor Air, Wiley, New York.radon daughter products in indoor air, Radiat. Prot. Dosim..and their decay products in indoor air, Health Phys. , 34,

Nero, A.V.

2008-01-01T23:59:59.000Z

2

Estimate of risk from environmental exposure to radon-222 and its decay products  

Science Journals Connector (OSTI)

... principal ways in which members of the public receive natural irradiation is by breathing the radon-222 decay products in air. ... -222 decay products in air. Radon gas is emitted by soil, rocks and building materials, all of which contain the ...

R. D. Evans; J. H. Harley; W. Jacobi; A. S. McLean; W. A. Mills; C. G. Stewart

1981-03-12T23:59:59.000Z

3

Assessment of the Exposure to and Dose from Radon Decay Products in Normally Occupied Homes  

Science Journals Connector (OSTI)

Assessment of the Exposure to and Dose from Radon Decay Products in Normally Occupied Homes ... In homes supplied by water with a high radon content, inhalation exposure from the radon in the water may occur on two different time scales: (a) long-term exposure that occurs due to an increase in the background radon concentration from radon released ... ... Experimental Assessment of the Short- and Long-Term Effects of 222Rn from Domestic Shower Water on the Dose Burden Incurred in Normally Occupied Homes ...

Philip K. Hopke; Bent. Jensen; Chih-Shan. Li; Nathalie. Montassier; Piotr. Wasiolek; Alfred J. Cavallo; Kenneth. Gatsby; Robert H. Socolow; Anthony C. James

1995-05-01T23:59:59.000Z

4

Risk of radon  

Science Journals Connector (OSTI)

... 10"4 per working level month would be an appropriate upper bound for exposure to radon decay products in the home.

M.C. O.'RIORDAN

1981-09-17T23:59:59.000Z

5

Radon Content of Rainwater  

Science Journals Connector (OSTI)

... mjjic./l. of rainwater and was due primarily to radium B + C. Since radon is present throughout the atmosphere, it continually supplies decay products which become attached to ... continually supplies decay products which become attached to aerosols and condensation droplets. The equilibrium between radon and radium A + B + C being established in about 4 h, the ...

PARTHA BANERJI; S. D. CHATTERJEE

1964-12-19T23:59:59.000Z

6

Radon risk reassessed  

Science Journals Connector (OSTI)

... UNDERGROUND miners who are heavily exposed to the radioactive decay products of radon gas (see figure) suffer especially high rates of lung cancer. Extrapolation from these ... figure) suffer especially high rates of lung cancer. Extrapolation from these data suggests that radon in people's homes may cause some 2,000 lung cancers each year in Britain1 ...

Julian Peto; Sarah Darby

1994-03-10T23:59:59.000Z

7

Radon  

Science Journals Connector (OSTI)

... introduction to the non-specialist; and, with its clear exposition of the history of radon and its applications, it will convey to him something of the care essential in ... The second part of the book is concerned with the details of the process of radon extraction. Separate chapters are devoted to the radium sources used, the extraction and purifying ...

1949-04-30T23:59:59.000Z

8

Radon: An Overview of Health Effects  

Science Journals Connector (OSTI)

Radon is one of the most comprehensively studied human carcinogens. It is a naturally occurring noble gas, and due to current construction methods, radon concentrations often become enhanced indoors. Radon is the largest single contributor to the natural radiation exposure to the general public. Two of its radioactive decay products, polonium-218 and polonium-214, impart the majority of radiation dose to the lungs, rather than the radon gas itself. In fact, protracted exposure to radon and its decay products is one of the greatest environmental health threats. Radon is the second leading cause of lung cancer in North America and the leading cause of lung cancer for individuals who have never smoked. Overall, radon is also the leading environmental cause of cancer mortality in North America. In vitro studies, controlled studies of radon-exposed animals, a variety of radiobiological analyses, 15 retrospective cohort studies of radon-exposed underground miners, and analyses of 22 pooled residential epidemiologic studies from North America, China, and Europe convincingly demonstrate that radon is a human lung carcinogen even at concentrations commonly encountered in the residential setting. Because of the significant health risks related to residential radon exposure, the World Health Organization (WHO) instituted an international initiative in 2005, the International Radon Project, to reduce indoor radon risks. This article and the following articles on radon provide a general overview of its characteristics, sources, occurrence, and health effects, as well as guidance on both radon measurement and mitigation.

R.W. Field

2011-01-01T23:59:59.000Z

9

Retrospective determination of radon in houses  

Science Journals Connector (OSTI)

... Indoor exposure to decay products of radon (222Rn) contributes the largest fraction of natural radiation dose to people living in subarctic ... of natural radiation dose to people living in subarctic or temperate regions of the world. Radon is an inert and radioactive gas in the natural decay series that commences with 238U ...

Christer Samuelsson

1988-07-28T23:59:59.000Z

10

Carrying the Ball on Radon  

NLE Websites -- All DOE Office Websites (Extended Search)

4 4 Carrying the Ball on Radon Part one of two parts Radon gas was "discovered" as an important environmental issue in the mid-1980s, when levels 1,000 times the average of about 1.5 picocuries/liter (pCi/l) were found in homes in the eastern United States. Radon is present in all homes, and even in outdoor air, because it is a gaseous decay product of radium naturally present in the soil. Since even an average indoor exposure to radon's own decay products-isotopes of polonium, bismuth, and lead-was estimated to cause a 0.1 to 1% risk of lung cancer, depending on whether one smoked, these high levels sounded an immediate alarm. By the mid-1980s, scientists had already proven that indoor radon levels 10 to 100 times the average-an unacceptable amount-occurred in homes in

11

Safe as houses? The risks of radon  

Science Journals Connector (OSTI)

... general lack of public concern about the health risks caused by the natural radioactive gas radon is one of the odder features of modern life. Whatever the reasons for that ... it deals with other alpha emitters, ingested rather than inhaled, as well as with radon and its short-lived decay products. These other alpha emitters will usually be found ...

John Fremlin

1988-09-08T23:59:59.000Z

12

Radon Concern in the Hickory Aquifer  

E-Print Network (OSTI)

Radon ConcernStory by Amanda Crawford tx H2O | pg. 20 As the primary water source for Mason,Concho, McCulloch, San Saba, Menard, Kimble, and Gillespie counties in Central Texas, the threat of elevated radionuclide concentra- tions... in the Hickory Aquifer's groundwater poses health risks for residents in the area. Radon is a natural, radioactive gas that may be found indoors in air or drinking water. Radon is the decay product of radium, so radon indi- rectly reflects the presence...

Crawford, Amanda

2005-01-01T23:59:59.000Z

13

Relation of Radon to Non-active Air Contamination  

Science Journals Connector (OSTI)

... Identification of the activity as radon products was obtained by tracing the decay through periods longer than two hours, and ... transmitted to that of a clean filter paper by a photoelectric densitometer. Although variations in radon over this period were considerably less (under a 20 to 1 maximum) than instances ...

C. D. THOMAS; M. K. GAINER; T. W. BALL

1955-04-23T23:59:59.000Z

14

Theory of top quark production and decay  

SciTech Connect

Direct and indirect information on the top quark mass and its decay modes is reviewed. The theory of top production in hadron- and electron-positron-colliders is presented.

Kuehn, J.H. [Universitaet Karlsruhe (Germany)

1997-01-01T23:59:59.000Z

15

Reassessing Radon in Drinking Water: Searching for Perspective on Radiation  

NLE Websites -- All DOE Office Websites (Extended Search)

Reassessing Radon in Drinking Water: Searching for Perspective on Radiation Reassessing Radon in Drinking Water: Searching for Perspective on Radiation Risks Speaker(s): Richard Sextro Date: October 27, 1998 - 12:00pm Location: 90-3148 Although most of the exposures to radon and its radioactive decay products arise from indoor airborne radon originating in the soil adjacent to buildings, some contact with radon can occur due to its presence in drinking water. The exposures and health risks associated with radon dissolved in drinking water are typically much smaller, although the magnitude of the exposures and risks have been uncertain and the subject of some controversy. The 1996 Amendments to the (U.S.) Safe Drinking Water Act required the U.S. Environmental Protection Agency to contract with the U.S. National Academy of Sciences (NAS) to re-evaluate the risks associated with

16

EPA discovers radon  

Science Journals Connector (OSTI)

... when they are of mineral construction such as stone, are also either a source of radon, the radioactive rare gas whose atoms are inescapably intermediates in the radioactive decay of ... it. One consequence is that all creatures on the surface of the Earth take in radon with every breath they breathe. Another is that those who live in houses may ...

1986-08-28T23:59:59.000Z

17

Production and decay of heavy top quarks  

SciTech Connect

Experimental evidence indicates that the top quark exists and has a mass between 50 and 200 GeV/c{sup 2}. The decays of a top quark with a mass in this range are studied with emphasis placed on the mass region near the threshold for production of real W bosons. Topics discussed are: (1) possible enhancement of strange quark production when M{sub W} + m{sub s} < m{sub t} < M{sub W} + m{sub b}; (2) exclusive decays of T mesons to B and B{asterisk} mesons using the non-relativistic quark model; (3) polarization of intermediate W's in top quark decay as a source of information on the top quark mass. The production of heavy top quarks in an e{sup +}e{sup {minus}} collider with a center-of-mass energy of 2 TeV is studied. The effective-boson approximation for photons, Z{sup 0}'s and W's is reviewed and an analogous approximation for interfaces between photons and Z{sup 0}'s is developed. The cross sections for top quark pair production from photon-photon, photon-Z{sup 0}, Z{sup 0}Z{sup 0}, and W{sup +}W{sup {minus}} fusion are calculated using the effective-boson approximation. Production of top quarks along with anti-bottom quarks via {gamma}W{sup +} and Z{sup 0}W{sup +} fusion is studied. An exact calculation of {gamma}e{sup +} {yields} {bar {nu}}t{bar b} is made and compared with the effective-W approximation. 31 refs., 46 figs.

Kauffman, R.P.

1989-08-01T23:59:59.000Z

18

Higgs boson production and decay: Dalitz sector  

Science Journals Connector (OSTI)

Abstract The processes H ? f ¯ f ? ( g ) , p p ? q ¯ + q ? H + ? ( g ) and p p ? q ( q ¯ ) + g ? H + q ( q ¯ ) pose severe challenges to the experimental analysis. They represent rare decays and production mechanisms of the Higgs boson at LHC. However, they are not Yukawa suppressed at next-to-leading order opening a window for the correct definition of pseudo-observables, e.g. a definition of ? ( H ? Z ? ) with universal inherent meaning, that are currently used in extracting information for the couplings of the newly discovered resonance at LHC. The impact of genuinely electroweak NLO corrections is discussed, as well as the comparison of ? ( p p ? g g X ? e + e ? ? ) to its zero-width approximation.

Giampiero Passarino

2013-01-01T23:59:59.000Z

19

Invited Article: Radon and thoron intercomparison experiments for integrated monitors at NIRS, Japan  

SciTech Connect

Inhalation of radon ({sup 222}Rn) and its short-lived decay products and of products of the thoron ({sup 220}Rn) series accounts for more than half of the effective dose from natural radiation sources. At this time, many countries have begun large-scale radon and thoron surveys and many different measurement methods and instruments are used in these studies. Consequently, it is necessary to improve and standardize technical methods of measurements and to verify quality assurance by intercomparisons between laboratories. Four international intercomparisons for passive integrating radon and thoron monitors were conducted at the NIRS (National Institute of Radiological Sciences, Japan). Radon exercises were carried out in the 24.4 m{sup 3} inner volume walk-in radon chamber that has systems to control radon concentration, temperature, and humidity. Moreover, the NIRS thoron chamber with a 150 dm{sup 3} inner volume was utilized to provide three thoron intercomparisons. At present, the NIRS is the only laboratory world-wide that has carried out periodic thoron intercomparison of passive monitors. Fifty laboratories from 26 countries participated in the radon intercomparison, using six types of detectors (charcoal, CR-39, LR 115, polycarbonate film, electret plate, and silicon photodiode). Eighteen laboratories from 12 countries participated in the thoron intercomparisons, using two etch-track types (CR-39 and polycarbonate) detectors. The tests were made under one to three different exposures to radon and thoron. The data presented in this paper indicated that the performance quality of laboratories for radon measurement has been gradually increasing. Results of thoron exercises showed that the quality for thoron measurements still needs further development and additional studies are needed to improve its measuring methods. The present paper provides a summary of all radon and thoron international intercomparisons done at NIRS from 2007 to date and it describes the present status on radon and thoron passive, one-time cycle monitors.

Janik, M., E-mail: mirek@fml.nirs.go.jp; Ishikawa, T.; Omori, Y.; Kavasi, N. [National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, 263-8555 Chiba (Japan)] [National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, 263-8555 Chiba (Japan)

2014-02-15T23:59:59.000Z

20

Radon reduction and radon monitoring in the NEMO experiment  

E-Print Network (OSTI)

) Abstract: The first data of the NEMO 3 neutrinoless double beta decay experiment have shown that the radon in the LSM (Laboratoire Souterrain de Modane, depth of 4800 m w.e.), investigates the neutrinoless double beta decay (20) of various nuclei [1]. The observation of such a process will give us fundamental

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Ris-R-1201(EN) Radon Transport Modelling  

E-Print Network (OSTI)

in atmospheric pressure. It can also be used for flux calculations of radon from the soil surface or to model of soil gas and combined generation, radioactive decay, diffusion and advection of radon can be solved. Moisture is included in the model, and partitioning of radon between air, water and soil grains (adsorption

22

Thoron detection with an active Radon exposure meter—First results  

SciTech Connect

For state-of-the-art discrimination of Radon and Thoron several measurement techniques can be used, such as active sampling, electrostatic collection, delayed coincidence method, and alpha-particle-spectroscopy. However, most of the devices available are bulky and show high power consumption, rendering them unfeasible for personal exposition monitoring. Based on a Radon exposure meter previously realized at the Helmholtz Center Munich (HMGU), a new electronic prototype for Radon/Thoron monitoring is currently being developed, which features small size and weight. Operating with pin-diode detectors, the low-power passive-sampling device can be used for continuous concentration measurements, employing alpha-particle-spectroscopy and coincidence event registration to distinguish decays originating either from Radon or Thoron isotopes and their decay products. In open geometry, preliminary calibration measurements suggest that one count per hour is produced by a 11?Bq?m{sup ?3} Radon atmosphere or by a 15?Bq?m{sup ?3} Thoron atmosphere. Future efforts will concentrate on measurements in mixed Radon/Thoron atmospheres.

Irlinger, J., E-mail: josef.irlinger@helmholtz-muenchen.de; Wielunski, M.; Rühm, W. [ISS, Helmholtz Center Munich, Research Center for Environment and Health, 85764 Neuherberg (Germany)] [ISS, Helmholtz Center Munich, Research Center for Environment and Health, 85764 Neuherberg (Germany)

2014-02-15T23:59:59.000Z

23

Radon emissions  

Science Journals Connector (OSTI)

... SIR,-Wendy Barnaby (August 28) writes on the problem of radon emission from the tailings of uranium milling in Sweden. This problem would arise from ... that has to be treated. She describes Professor Robert O. Pohl's report that "radon can escape more easily from the broken ground of a mine than from an undisturbed ...

SVEN-ERIC BRUNNSJO

1975-10-09T23:59:59.000Z

24

Radon activity  

Science Journals Connector (OSTI)

... EXPOSURE to large quantities of radioactive radon gas in the home is associated with a high frequency of mutations in a gene ... controversial idea that leukaemia is more prevalent in countries where the average indoor concentration of radon is high. The blood samples were taken from 20 non-smoking adults from the ...

1991-05-23T23:59:59.000Z

25

Simulation of Radon Transport in Geothermal Reservoirs  

SciTech Connect

Numerical simulation of radon transport is a useful adjunct in the study of radon as an in situ tracer of hydrodynamic and thermodynamic numerical model has been developed to assist in the interpretation of field experiments. The model simulates transient response of radon concentration in wellhead geofluid as a function of prevailing reservoir conditions. The radon simulation model has been used to simulate radon concentration response during production drawdown and two flowrate transient tests in vapor-dominated systems. Comparison of model simulation with experimental data from field tests provides insight in the analysis of reservoir phenomena such as propagation of boiling fronts, and estimates of reservoir properties of porosity and permeability thickness.

Semprini, Lewis; Kruger, Paul

1983-12-15T23:59:59.000Z

26

Radon Training for Professionals  

E-Print Network (OSTI)

's International Radon Project, EPA, states, Canadian provinces, tribal nations, partner Regional Radon Training University. · MURC is widely respected as an international leader in radon training. · Your course is fromRadon Training for Professionals 2008-2009 www.cce.umn.edu/radon Regional Radon Training Center

Netoff, Theoden

27

Indoor Radon and Its Decay Products: Concentrations, Causes, and Control Strategies  

E-Print Network (OSTI)

in family dweiiings, Health Phys. 57, 465. BPA (1986).monitoring results from BPA's residential weatherizationWeatherization Program (BPA 1986). This program has

Nero, A.V.

2008-01-01T23:59:59.000Z

28

Indoor Radon and Its Decay Products: Concentrations, Causes, and Control Strategies  

E-Print Network (OSTI)

and a perspective on acceptable risks, that constitute themany people will deem the risk acceptable because of somethe level of risk that is considered acceptable can change.

Nero, A.V.

2008-01-01T23:59:59.000Z

29

It's Elemental - Isotopes of the Element Radon  

NLE Websites -- All DOE Office Websites (Extended Search)

Astatine Astatine Previous Element (Astatine) The Periodic Table of Elements Next Element (Francium) Francium Isotopes of the Element Radon [Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. Naturally Occurring Isotopes Radon has no naturally occurring isotopes. Known Isotopes Mass Number Half-life Decay Mode Branching Percentage 193 1.15 milliseconds Alpha Decay 100.00% 194 0.78 milliseconds Alpha Decay 100.00% 195 6 milliseconds Alpha Decay 100.00% 195m 5 milliseconds Alpha Decay 100.00% 196 4.4 milliseconds Alpha Decay 99.90% Electron Capture ~ 0.10% 197 53 milliseconds Alpha Decay 100.00% 197m 25 milliseconds Alpha Decay 100.00% 198 65 milliseconds Alpha Decay No Data Available

30

Development of radon sources with a high stability and a wide range  

SciTech Connect

A solid {sup 222}Rn (radon) source using a fibrous and porous SiC ceramic disk was developed. The emission rate of radon emanated from the disk depended on the content of {sup 226}Ra and the sintering temperature. A {sup 226}Ra sulfate ({sup 226}RaSO{sub 4}) solution was dropped on a fibrous SiC ceramic disk (33 mm?) of 1 mm in thickness, and sintered at 400 °C. The radon concentration from a disk containing {sup 226}Ra of 1.85 MBq was measured to be 38 kBq m{sup ?3} at a carrier airflow rate of 0.5 L min{sup ?1}. By adjusting the {sup 226}Ra content or the sweep airflow rate, the radon concentrations were easily controlled over a wide range of over three orders of magnitude. The concentration was very stable for a long term. The compactness of the source disk made is easy for handling the source container and the shielding of gamma radiation from {sup 226}Ra and its decay products. Such advantages in a radon generation system are desirable for experiments of high-level, large-scale radon exposure.

Fukutsu, K.; Yamada, Y. [National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage-ku, Chiba 263-8555 (Japan)] [National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage-ku, Chiba 263-8555 (Japan)

2013-12-15T23:59:59.000Z

31

Strange particle production in hadronic Z{sup 0} decays  

SciTech Connect

A study has been made of neutral strange baryons and pseudoscalar mesons produced in hadronic decays of the weak gauge boson V. The experiment was performed at the Stanford Linear Accelerator Center, which has the unique capability of colliding highly polarized electrons with unpolarized positrons. Overall production rates and spectra of the K{sup 0} and the {Lambda}{sup 0} (+{Lambda}{sup 0}) were measured and compared with other experiments as well as with Quantum Chromodynamics calculations. The combination of the small, stable beam spots produced by the SLAC Linear Collider (SLC) and the precision vertexing capabilities of the SLC Large Detector (SLD) permitted the separation of the hadronic events into three quark flavor-enriched samples. An unfolding was performed to obtain flavor-pure samples, and for the first time measurements were made of K{sup 0} and {Lambda}{sup 0} (+{Lambda}{sup 0}) production rates and spectra in uds, c, and b quark events at the Z{sup 0} pole. This measurement revealed significant production differences. Utilizing the large quark production asymmetry due to the polarized electron beam, high-purity quark and antiquark jet samples were obtained. The first measurement of production differences of the {Lambda}{sup 0} baryon in quark and antiquark jets was performed, which provided clear evidence for a leading particle effect at high momenta.

Baird, K.G. III

1996-04-01T23:59:59.000Z

32

Study of flavor-tagged baryon production in B decay  

E-Print Network (OSTI)

ARTICLES Study of flavor-tagged baryon production in B decay R. Ammar, 1 P. Baringer, 1 A. Bean, 1 D. Besson, 1 D. Coppage, 1 N. Copty, 1 R. Davis, 1 N. Hancock, 1 S. Kotov, 1 I. Kravchenko, 1 N. Kwak, 1 Y. Kubota, 2 M. Lattery, 2 J. K. Nelson, 2 S..., 4 K. Honscheid, 4 H. Kagan, 4 R. Kass, 4 J. Lee, 4 M. Sung, 4 C. White, 4 R. Wanke, 4 A. Wolf, 4 M. M. Zoeller, 4 X. Fu, 5 B. Nemati, 5 W. R. Ross, 5 P. Skubic, 5 M. Wood, 5 M. Bishai, 6 J. Fast, 6 E. Gerndt, 6 J. W. Hinson, 6 T. Miao, 6 D. H. Miller...

Baringer, Philip S.

1997-01-01T23:59:59.000Z

33

Radon in Soil Gas Above Bedrock Fracture Sets at the Shepley’s Hill Superfund Site  

SciTech Connect

The Idaho National Laboratory (INL) recently provided technical support for ongoing environmental remediation activities at the Shepley’s Hill remediation site near Devens, MA (Figure 1). The technical support was requested as follow-on work to an initial screening level radiation survey conducted in 2008. The purpose of the original study was to assess the efficacy of the INL-developed Backpack Sodium Iodide System (BaSIS) for detecting elevated areas of natural radioactivity due to the decay of radon-222 gases emanating from the underlying fracture sets. Although the results from the initial study were mixed, the BaSIS radiation surveys did confirm that exposed bedrock outcrops have higher natural radioactivity than the surficial soils, thus a high potential for detecting elevated levels of radon and/or radon daughter products. (INL 2009) The short count times associated with the BaSIS measurements limited the ability of the system to respond to elevated levels of radioactivity from a subsurface source, in this instance radon gas emanating from fracture sets. Thus, it was postulated that a different methodology be employed to directly detect the radon in the soil gases. The CR-39 particle track detectors were investigated through an extensive literature and technology search. The relatively long deployment or “detection” time of several days, as well as the sensitivity of the measurement and robustness of the detectors made the CR-39 technology promising for deployment at the Shepley’s Hill site.

J.R. Giles; T.L. McLing; M.V. Carpenter; C.J. Smith; W. Brandon

2012-12-01T23:59:59.000Z

34

Radiation and Radon from Natural Stone May 7, 2008  

E-Print Network (OSTI)

Radiation and Radon from Natural Stone May 7, 2008 W.J. Llope Rice University, Houston, TX 77005 is "radiation" and the other is "radon." Radioactive elements, by their very nature, seek stability by decaying the outside and cause damage to cells and DNA, potentially causing cancer. Also, naturally occurring Uranium

Llope, William J.

35

Radon-222 Daughter Concentrations in Uranium Mine Atmospheres  

Science Journals Connector (OSTI)

... undertaken to measure the concentrations of 210Pb and 210Po in uranium mine atmospheres at various radon daughter concentration levels, and to determine the amount of 210Pb in the mine atmosphere ... atmosphere relative to that which would be produced from the decay of the short-lived radon daughters deposited in the lungs. Radium-226 was also measured in air so as ...

RICHARD L. BLANCHARD

1969-07-19T23:59:59.000Z

36

NEANDC specialists meeting on yields and decay data of fission product nuclides  

SciTech Connect

Separate abstracts were prepared for the 29 papers presented. Workshop reports on decay heat, fission yields, beta- and gamma-ray spectroscopy, and delayed neutrons are included. An appendix contains a survey of the most recent compilations and evaluations containing fission product yield, fission product decay data, and delayed neutron yield information. (WHK)

Chrien, R.E.; Burrows, T.W. (eds.)

1983-01-01T23:59:59.000Z

37

Radon in Homes: Recent Developments  

Science Journals Connector (OSTI)

Radon in Homes: Recent Developments ... This report gives an update on current developments regarding the issue of radon in homes. ...

Charles H. Atwood

2006-10-01T23:59:59.000Z

38

Production cross section and topological decay branching fractions of the ? lepton  

E-Print Network (OSTI)

We report new measurements of the production cross section for the reaction e(+)e(?)??(+)?(?) at s?=29 GeV, as well as the topological decay branching fractions of the ? lepton. The data were taken with the High Resolution ...

Baringer, Philip S.

1989-08-01T23:59:59.000Z

39

Radon Progeny as a experimental tool for dosimetry of nanoaerosols  

NLE Websites -- All DOE Office Websites (Extended Search)

Radon Progeny as a experimental tool for dosimetry of nanoaerosols Radon Progeny as a experimental tool for dosimetry of nanoaerosols Title Radon Progeny as a experimental tool for dosimetry of nanoaerosols Publication Type Journal Article LBNL Report Number LBNL-117E Year of Publication 2009 Authors Ruzer, Lev S., and Michael G. Apte Journal Radiation Biology. Radioecology (Russian) Volume 49 Start Page Chapter Issue 3 Pagination 395-404 Other Numbers LBNL-117E Abstract The study of aerosol exposure and dosimetry measurements and related quantitation of health effects are important to the understanding of the consequences of air pollution, and are discussed widely in the scientific literature. During the last 10 years the need to correlate aerosol exposure and biological effects has become especially important due to rapid development of a new, revolutionary industry - nanotechnology. Nanoproduct commerce is predicted to top $1 trillion by 2015. Quantitative assessment of aerosol particle behavior in air and in lung deposition, and dosimetry in different parts of the lung, particularly for nanoaerosols, remains poor despite several decades of study. Direct measurements on humans are still needed in order to validate the hollow cast, animal studies, and lung deposition modeling. We discuss here the use of nanoscale radon decay products as an experimental tool in the study of local deposition and lung dosimetry for nanoaerosols. The issue of the safe use of radon progeny in such measurements is discussed based on a comparison of measured exposure in 3 settings: general population, miners, and in a human experiment conducted at the Paul Scherer Institute (PSI) in Switzerland. One of the properties of radon progeny is that they consist partly of 1 nm radioactive particles called unattached activity; having extremely small size and high diffusion coefficients, these particles can be potentially useful as radioactive tracers in the study of nanometer-sized aerosols. We present a theoretical and experimental study of the correlation between the unattached activity and aerosol particle surface area, together with a description of its calibration and method for measurement of the unattached fraction

40

Unattached radon progeny as an experimental tool for dosimetry of  

NLE Websites -- All DOE Office Websites (Extended Search)

Unattached radon progeny as an experimental tool for dosimetry of Unattached radon progeny as an experimental tool for dosimetry of nanoaerosols: Proposed method and research strategy Title Unattached radon progeny as an experimental tool for dosimetry of nanoaerosols: Proposed method and research strategy Publication Type Journal Article LBNL Report Number LBNL-117E Year of Publication 2010 Authors Ruzer, Lev S., and Michael G. Apte Journal Inhalation Toxicology Volume 22 Pagination 760-766 Abstract The study of aerosol exposure and dosimetry measurements and related quantitation of health effects are important to the understanding of the consequences of air pollution, and are discussed widely in the scientific literature. During the last 10 years the need to correlate aerosol exposure and biological effects has become especially important due to rapid development of a new, revolutionary industry - nanotechnology. Nanoproduct commerce is predicted to top $1 trillion by 2015. Quantitative assessment of aerosol particle behavior in air and in lung deposition, and dosimetry in different parts of the lung, particularly for nanoaerosols, remains poor despite several decades of study. Direct measurements on humans are still needed in order to validate the hollow cast, animal studies, and lung deposition modeling. We discuss here the use of nanoscale radon decay products as an experimental tool in the study of local deposition and lung dosimetry for nanoaerosols. The issue of the safe use of radon progeny in such measurements is discussed based on a comparison of measured exposure in 3 settings: general population, miners, and in a human experiment conducted at the Paul Scherer Institute (PSI) in Switzerland. One of the properties of radon progeny is that they consist partly of 1 nm radioactive particles called unattached activity; having extremely small size and high diffusion coefficients, these particles can be potentially useful as radioactive tracers in the study of nanometer-sized aerosols. We present a theoretical and experimental study of the correlation between the unattached activity and aerosol particle surface area, together with a description of its calibration and method for measurement of the unattached fraction

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Radon in Syrian houses  

Science Journals Connector (OSTI)

A nationwide investigation of radon levels in Syrian houses was carried out during the period 1991 - 1993. Passive radon diffusion dosemeters using polycarbonate detectors were distributed in houses all over Syria. Detectors were subjected to electrochemical etching to reveal latent tracks of alpha particles. The mean radon concentration in Syrian houses was found to be with some values several times higher. This investigation indicated that there were a few houses in Syria that require remedial action. Most houses that have high levels of radon were found in the southern area, especially in the Damascus governorate. The study also indicated that radon concentrations were higher in old houses built from mud with no tiling.

I Othman; M Hushari; G Raja; A Alsawaf

1996-01-01T23:59:59.000Z

42

Effect of radon dose on cleanup criteria and using RESRAD for chemical risk assessment  

SciTech Connect

The US Department of Energy has used RESRAD, a pathway analysis program developed at Argonne National Laboratory, in conjunction with the as low as reasonably achievable (ALARA) principle to develop site-specific residual radioactive material guidelines (cleanup criteria) for many sites. This study examines the effects of the radon pathway, recently added to the RESRAD program, on the calculation of uranium, radium, and thorium cleanup criteria. The results show that the derived uranium guidelines will not be affected by the radon ingrowth considerations. The effect of radon on radium and thorium generic guidelines is more significant, but the model does indicate that at the generic soil limits used for radium and thorium the indoor radon decay product concentrations would be below the 0.02 working level standard. This study also examines the feasibility of applying RESRAD to chemical risk assessment. The results show that RESRAD can perform risk assessment of toxic chemicals after simple modifications. Expansion of the RESRAD database to include chemical compounds will increase its capability to handle chemical risk assessments. 11 refs., 3 tabs.

Yu, C.; Cheng, J.-J. (Argonne National Lab., IL (United States)); Wallo, A. III (USDOE, Washington, DC (United States))

1991-01-01T23:59:59.000Z

43

Hadron production from resonance decay in relativistic collisions  

E-Print Network (OSTI)

A statistical model for decay and formation of heavy hadronic resonances is formulated. The resonance properties become increasingly uncertain with increasing resonance mass. Drawing on analogy with the situation in low-energy nuclear physics, we employ the Weisskopf approach to the resonance processes. In the large-mass limit, the density of resonance states in mass is governed by a universal Hagedorn-like temperature T_H. As resonances decay, progressively more and more numerous lighter states get populated. For T_H \\simeq 170 MeV, the model describes data for the hadron yield ratios at the RHIC and SPS energies under the extreme assumption of a single heavy resonance giving rise to measured yields.

Subrata Pal; Pawel Danielewicz

2005-05-17T23:59:59.000Z

44

Field-induced decay of quantum vacuum: visualizing pair production in a classical photonic system  

E-Print Network (OSTI)

The phenomenon of vacuum decay, i.e. electron-positron pair production due to the instability of the quantum electrodynamics vacuum in an external field, is a remarkable prediction of Dirac theory whose experimental observation is still lacking. Here a classic wave optics analogue of vacuum decay, based on light propagation in curved waveguide superlattices, is proposed. Our photonic analogue enables a simple and experimentally-accessible visualization in space of the process of pair production as break up of an initially negative-energy Gaussian wave packet, representing an electron in the Dirac sea, under the influence of an oscillating electric field.

Stefano Longhi

2010-09-01T23:59:59.000Z

45

Home Safety: Radon Gas  

E-Print Network (OSTI)

Every home should be tested for radon, an invisible, odorless, radioactive gas that occurs naturally. This publication explains the health risks, testing methods, and mitigation and reduction techniques....

Shaw, Bryan W.; Denny, Monica L.

1999-11-12T23:59:59.000Z

46

Leukaemia risks and radon  

Science Journals Connector (OSTI)

... SIR - A correlation has been established between domestic radon exposure and mutation in peripheral T lymphocytes1. Some caution must be exercised, however, ... result

SIMON P. WOLFF

1991-07-25T23:59:59.000Z

47

Thoron and decay products, beyond UNSCEAR 2006 Annex E  

Science Journals Connector (OSTI)

......uranium, tin, tantalum, niobium, rare earths, aluminum, some copper and...elevated radioactivity levels in phosphogypsum arising from the production of phosphate...226Ra 0.1-15 000 Residue (rare earth extraction) 228Ra 20-3000......

D. B. Chambers

2010-10-01T23:59:59.000Z

48

Follow-up study of indoor radon in Greek buildings  

Science Journals Connector (OSTI)

......Greece 3 Greek Atomic Energy Commission, Agia...the Greek Atomic Energy Commission (GAEC...exposure to radon in the home and workplace. It...m3 increase in the average radon concentration...the Greek Atomic Energy Commission (GAEC...increase in energy consumption from wood products......

A. Clouvas; S. Xanthos; M. Kolovou; C. Potiriadis; G. Takoudis; J. Guilhot

2013-12-01T23:59:59.000Z

49

Radon scare doubted  

Science Journals Connector (OSTI)

... University of Bristol claim, in last week's issue of the Lancet, that radioactive radon gas seeping into buildings may cause leukaemia and several other cancers. The team, led ... other cancers. The team, led by Denis Henshaw, correlated leukaemia records with average indoor radon concentrations across 14 countries. They believe that ...

Peter Aldhous

1990-05-03T23:59:59.000Z

50

Risk of radon  

Science Journals Connector (OSTI)

... 98) considered the individual lung cancer risk to the general population from indoor exposure to radon-222 and concluded that a current upper estimate is 10"4 per lifetime per working ... estimate, a further potentially major consideration was not included. The general background effect of radon was assessed by identifying lung cancer rates before cigarette smoking became popular. Those rates ...

ROBERT L. FLEISCHER

1981-09-17T23:59:59.000Z

51

Little danger from radon  

Science Journals Connector (OSTI)

... the potential alpha energy in air from any combination of the short-lived daughters of radon. 1 WL = 1.3 ? 10" MeV nT3). A recent survey ( ... Biol 23, 696-711; 1978) estimated that the average population exposure rate domestically to radon daughters for Great Britain is about 0.15 WLM per year.

K. D. CLIFF; B. L. DAVIES; J. A. REISSLAND

1979-05-03T23:59:59.000Z

52

Ionisation Potential of Radon  

Science Journals Connector (OSTI)

... WE have determined the ionisation potential of radon, using the well-known method,1 due to Hertz, of compensation of the negative ... xenon and krypton: it was found to be 2.6 volts. The quantity of radon used in different experiments was of the order of 300 millicuries. The volume of ...

F. HOLWECK; L. WERTENSTEIN

1930-09-20T23:59:59.000Z

53

Radon to predict earthquakes  

Science Journals Connector (OSTI)

... , at least in the West, is the apparently premonitory change in the emission of radon. In a brief conference abstract King (Eos, 56, 1019; 1975) recently reported ... conference abstract King (Eos, 56, 1019; 1975) recently reported that monitoring of the radon concentration in soil gas was begun in May 1975 at 18 sites along an active ...

Peter J. Smith

1976-05-13T23:59:59.000Z

54

Concentrations of Radon-222 in Coal Mines in England and Scotland  

Science Journals Connector (OSTI)

... in each mine and then taken to the Radiological Protection Service laboratory for content of radon to be measured. The sample was transferred to a vessel containing a zinc sulphide ... vessel containing a zinc sulphide screen held at a negative potential. The decay of the radon atoms produces positively charged radium-A atoms which are attracted to the screen, and ...

M. J. DUGGAN; D. M. HOWELL; P. J. SOILLEUX

1968-09-14T23:59:59.000Z

55

Radon-222 Emanation and the High Apparent Lead Isotope Ages in Lunar Dust  

Science Journals Connector (OSTI)

... 232Th decay chains may be a significant mechanism for a partial redistribution of the post-radon lead daughters. Kraner2 suggested that there may be an alpha-emitting radioactive deposit on ... radioactive deposit on the lunar surface as a result of the decay in space of radon isotopes which might diffuse out of lunar surface material. Turkevich3 reported evidence for such ...

J. A. S. ADAMS; PAULO M. BARRETTO; RONALD B. CLARK; JOE S. DUVAL

1971-05-21T23:59:59.000Z

56

Construction and measurements of a vacuum-swing-adsorption radon-mitigation system  

E-Print Network (OSTI)

Long-lived alpha and beta emitters in the $^{222}$Rn decay chain on (and near) detector surfaces may be the limiting background in many experiments attempting to detect dark matter or neutrinoless double-beta decay, and in screening detectors. In order to reduce backgrounds from radon-daughter plate-out onto the wires of the BetaCage during its assembly, an ultra-low-radon cleanroom is being commissioned at Syracuse University using a vacuum-swing-adsorption radon-mitigation system. The radon filter shows ~20$\\times$ reduction at its output, from 7.47$\\pm$0.56 to 0.37$\\pm$0.12 Bq/m$^3$, and the cleanroom radon activity meets project requirements, with a lowest achieved value consistent with that of the filter, and levels consistently < 2 Bq/m$^3$.

R. W. Schnee; R. Bunker; G. Ghulam; D. Jardin; M. Kos; A. S. Tenney

2014-04-23T23:59:59.000Z

57

Possible Anisotropies in the Production and Decay Correlations of the ??(958)  

Science Journals Connector (OSTI)

The spin and parity analysis of the ??(958) from the distribution of events on the ?+?-? and the ?+?-? Dalitz plots has been shown to favor JP=0- over 2-, but not conclusively. The Brookhaven National Laboratory-University of Michigan data reported here indicate anisotropies in the production and decay correlation angular distributions. Earlier Lawrence Berkeley Laboratory data dilute these effects. The observed anisotropies weaken the evidence for a JP=0- assignment for the ??(958).

G. R. Kalbfleisch; S. R. Borenstein; J. S. Danburg; R. C. Strand; V. Vanderburg; J. W. Chapman; R. K. Kiang; J. Lys; A. Rittenberg

1973-07-30T23:59:59.000Z

58

Search for invisible decays of Higgs bosons in the vector boson fusion and associated ZH production modes  

E-Print Network (OSTI)

A search for invisible decays of Higgs bosons is performed using the vector boson fusion and associated ZH production modes. In the ZH mode, the Z boson is required to decay to a pair of charged leptons or a b[bar over b] ...

Apyan, Aram

59

Decay Energies of Gaseous Fission Products and their Daughters for A=88 to 93  

Science Journals Connector (OSTI)

A systematic study of ?-decay energies has been made for mass-separated activities of Kr gaseous fission products and their daughters at the TRISTAN on-line separator facility at the Ames Laboratory research reactor. A well-type plastic scintillator was used in coincidence with a Ge(Li) ? detector to determine ?-group end-point energies and deduce Q values. The following ?-decay energies have been determined: Kr88, 2.93 ± 0.03 MeV; Rb88, 5.30 ± 0.06 MeV; Kr89, 4.93 ± 0.06 MeV; Kr90, 4.35 ± 0.05 MeV; Rb90, 6.32 ± 0.07 MeV; Kr91, 6.12 ± 0.07 MeV; Rb91, 5.68 ± 0.04 MeV; Kr92, 5.97 ± 0.08 MeV; Rb92, 7.58 ± 0.15 MeV; Sr92, 1.93 ± 0.03 MeV; Kr93, 8.3 ± 0.5 MeV; and Rb93, 7.23 ± 0.10 MeV. The decay energies are compared with previous measurements, systematics predictions, and two currently accepted mass relations. The energies are used to predict the ?-decay energies for 13 additional nuclei by means of systematics.

J. R. Clifford; W. L. Talbert; Jr.; F. K. Wohn; J. P. Adams; J. R. McConnell

1973-06-01T23:59:59.000Z

60

Czech primary radon measurement equipment  

Science Journals Connector (OSTI)

......radium needles in a depleted uranium shielding are used...for radon. Environ. Health. Perspect. (1991...exposure to Rn daughters. Health. Phys. (1998) 54...al. Radon and public health, report of the independent......

Ivo Burian; Petr Otahal; Josef Vosahlik; Eliska Pilecka

2011-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

ORNL-5489 Radon and Radon Daughter  

Office of Legacy Management (LM)

_._-l"." _._-l"." .-_ "...",.,~~-- ORNL-5489 Radon and Radon Daughter Measurements at and near the Former Middlesex Sampling Plant, Middlesex, New Jersey F. F. Haywood P. T. Perdue D. J . Chris tian R. W . Leggett H. W . Dickson T. E. Myric k ,--___ . . . ^.. Printed in the United States of America. Available from National Technical information Service US. Department of Commerce 5285 Port Royal Road, Springfield, Virginia 22161 NTIS price codes-Printed Copy: A04 Microfiche A01 This report was prepared as an account of work sponsored by an agency of the United StatesGovernment. Neither theU nited States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or

62

Radon programmes and health marketing  

Science Journals Connector (OSTI)

......possible way is to employ health marketing that draws...INTRODUCTION Being aware of health effects of the exposure...people that radon is dangerous. Generally, people...radon could not be so dangerous. Table-1. Risk perception...stronger evidence of radon health effects(4) WHO draws......

Ivana Fojtikova; Katerina Rovenska

2011-05-01T23:59:59.000Z

63

Radon: a bibliography  

SciTech Connect

The Lawrence Berkeley Laboratory, with the support of the Department of Energy, has developed a computerized database to manage research information in the area of building ventilation and indoor air quality. This literature survey contains references pertaining to the physical properties of radon and its daughters, instrumentation for their measurement, health effects, surveys and measurements, and regulatory information. The references in the bibliography are sequenced in alphabetical order and abstracts are included when supplied by the author. The objective of this report is to disseminate the bibliographic references compiled at the laboratory relating to radon research portion of the program. Interested database users are encouraged to contact the laboratory to receive instructions for direct database acess. A flyer describing the database is supplied at the end of the bibliography and a brief overview of the Radon Research porgram is given.

Lepman, S.R.; Boegel, M.L.; Hollowell, C.D.

1981-01-01T23:59:59.000Z

64

Beta Beams for Neutrino Production Heat Deposition from Decaying Ions in Superconducting Magnets  

E-Print Network (OSTI)

This report describes studies of energy deposition in superconducting magnets from secondary ions in the "beta beam" decay ring as described in the base-line scenario of the EURISOL Beta Beam Design Study. The lattice structure proposed in the Design Study has absorber elements inserted between the superconducting magnets to protect the magnet coils. We describe an efficient and small model made to carry out the study. The specially developed options in the beam code "ACCSIM" to track largely off-momentum particles has permitted to extract the necessary information to interface the transport and interaction code "FLUKA" with the aim to calculate the heat deposition in the magnets and the absorbers. The two beta emitters 18Ne10+ and 6He2+ used for neutrino and anti-neutrino production and their daughter ions have been tracked. The absorber system proposed in the Design Study is efficient to intercept the ions decayed in the arc straight sections as foreseen, however, the continuous decay in the dipoles induce ...

Wildner, Elena; Cerutti, F

2008-01-01T23:59:59.000Z

65

Beta Beams for neutrino production: Heat deposition from decaying ions in superconducting magnets  

E-Print Network (OSTI)

This note describes studies of energy deposition in superconducting magnets from secondary ions in the “beta beam” decay ring as described in the base-line scenario of the EURISOL Beta Beam Design Study. The lattice structure proposed in the Design Study has absorber elements inserted between the superconducting magnets to protect the magnet coils. We describe an efficient and small model made to carry out the study. The specially developed options in the beam code “ACCSIM” to track largely off-momentum particles has permitted to extract the necessary information to interface the transport and interaction code “FLUKA” with the aim to calculate the heat deposition in the magnets and the absorbers. The two beta emitters 18Ne10+ and 6He2+ used for neutrino and anti-neutrino production and their daughter ions have been tracked. The absorber system proposed in the Design Study is efficient to intercept the ions decayed in the arc straight sections as foreseen, however, the continuous decay in the dipol...

Wildner, Elena; Cerutti, Francesco

66

HIGLU and HDECAY: Programs for Higgs boson production at the LHC and Higgs boson decay widths  

Science Journals Connector (OSTI)

The total cross section for neutral Higgs boson production via the gluon fusion mechanism including NLO (two-loop) QCD corrections can be calculated numerically with the program HIGLU within the Standard Model (SM) as well as its minimal supersymmetric extension (MSSM). The program HDECAY determines the decay widths and branching ratios of the Higgs bosons within the SM and the MSSM, including the dominant higher-order corrections. The program is able to calculate the branching ratios of the MSSM Higgs bosons into standard and supersymmetric particles.

Michael Spira

1997-01-01T23:59:59.000Z

67

Observing Higgs boson production through its decay into ?-rays: A messenger for dark matter candidates  

Science Journals Connector (OSTI)

Abstract In this Letter, we study the ?-ray signatures subsequent to the production of a Higgs boson in space by dark matter annihilations. We investigate the cases where the Higgs boson is produced at rest or slightly boosted and show that such configurations can produce characteristic bumps in the ?-ray data. These results are relevant in the case of the Standard Model-like Higgs boson provided that the dark matter mass is about 63 GeV, 109 GeV or 126 GeV, but can be generalized to any other Higgs boson masses. Here, we point out that it may be worth looking for a 63 GeV line since it could be the signature of the decay of a Standard Model-like Higgs boson produced in space, as in the case of a di-Higgs final state if m ? ? 126 GeV . We show that one can set generic constraints on the Higgs boson production rates using its decay properties. In particular, using the Fermi-LAT data from the galactic center, we find that the dark matter annihilation cross section into ?+ a Standard Model-like Higgs boson produced at rest or near rest cannot exceed ? ? v ? ? a few 10 ? 25 cm 3 / s or ? ? v ? ? a few 10 ? 27 cm 3 / s respectively, providing us with information on the Higgs coupling to the dark matter particle. We conclude that Higgs bosons can indeed be used as messengers to explore the dark matter mass range.

Nicolás Bernal; Céline Bœhm; Sergio Palomares-Ruiz; Joseph Silk; Takashi Toma

2013-01-01T23:59:59.000Z

68

Production and FCNC decay of supersymmetric Higgs bosons into heavy quarks in the LHC  

E-Print Network (OSTI)

We analyze the production and subsequent decay of the neutral MSSM Higgs bosons (h = h^0, H^0, A^0) mediated by flavor changing neutral currents (FCNC) in the LHC collider. We have computed the h-production cross-section times the FCNC branching ratio, \\sigma(pp -> h -> qq') = \\sigma(pp -> h) B(h -> qq'), in the LHC focusing on the strongly-interacting FCNC sector. Here qq' is an electrically neutral pair of quarks of different flavors, the dominant modes being those containing a heavy quark: tc or bs. We determine the maximum production rates for each of these modes and identify the relevant regions of the MSSM parameter space, after taking into account the severe restrictions imposed by low energy FCNC processes. The analysis of \\sigma(pp -> h -> qq') singles out regions of the MSSM parameter space different from those obtained by maximizing only the branching ratio, due to non-trivial correlations between the parameters that maximize/minimize each isolated factor. The production rates for the bs channel can be huge for a FCNC process (0.1-1 pb), but its detection can be problematic. The production rates for the tc channel are more modest (10^{-3}-10^{-2} pb), but its detection should be easier due to the clear-cut top quark signature. A few thousand tc events could be collected in the highest luminosity phase of the LHC, with no counterpart in the SM.

Santi Bejar; Jaume Guasch; Joan Sola

2005-10-31T23:59:59.000Z

69

Radon in homes and other technologically enhanced radioactivity  

SciTech Connect

The results are described of recent observations at Argonne National Laboratory, contributing to our knowledge of such factors as the origin of high levels of radon in houses, its variability with time or otherwise, its uniformity throughout the house or otherwise, and the behavior and fate of the short-lived daughter-products. In a sample of 110 houses, mostly in the west suburban area of Chicago, 15% had radon concentrations in excess of 6 pCi litre/sup -1/ and 96% greater than 10 pCi litre /sup -1/. If this distribution is representative of all houses in the USA, the population being exposed to such high concentrations of radon is far greater than the number of people in Grand Junction being exposed to quite similar concentrations from technologically enhanced radioactivity. There is a great need for far more extensive data on radon in houses.

Rundo, J.; Toohey, R.E.

1983-01-01T23:59:59.000Z

70

EPA urges testing of homes for radon  

Science Journals Connector (OSTI)

EPA urges testing of homes for radon ... The action was based on cooperative surveys of home radon levels conducted by EPA and 17 states. ...

DAVID HANSON

1988-09-19T23:59:59.000Z

71

E-Print Network 3.0 - alpha-decay recoil products Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Summary: .A., Sherriff, B.L., Fleet, M.E., McCammon, C., 1991. Alpha-decay damage in titanite: American Mineralogist, 76... , G.R., Ewing, R.C., 1988. Alpha decay damage in...

72

How to live with radon  

Science Journals Connector (OSTI)

... hundred is from fumes, falls or fires. If potential deaths from indoor exposure to radon are included, home seems even less a haven. Participants at a recent meeting* ... included, home seems even less a haven. Participants at a recent meeting* agreed that radon is the most serious cause of human irradiation, attempted to quantify the consequences for ...

Michael O'Riordan

1988-01-28T23:59:59.000Z

73

Do radon anomalies predict earthquakes?  

Science Journals Connector (OSTI)

... THE discovery that the radon content of groundwater in a deep well increased significantly before the magnitude 5.3 Tashkent ... prompted many research groups in the USSR, China, Japan and the US to monitor radon levels in wells and springs in earthquake-prone zones. Many ...

Chi-Yu King

1981-09-24T23:59:59.000Z

74

Production and Decay Properties of Protactinium Isotopes of Mass 222 to 225 Formed in Heavy-Ion Reactions  

Science Journals Connector (OSTI)

Four ?-decay chains initiated by Pa225, Pa224, Pa223, and Pa222 were produced by the bombardment of thallium, lead, and bismuth targets with beams of Ne22, Ne20, F19, O18, O16, N15, and N14 at the Berkeley heavy-ion linear accelerator. The reaction products were transported from the reaction cell by the helium-jet technique and their decay was measured with a semiconductor detector. Energy values, excitation functions, half-lives, and genetic relationships of individual peaks were determined. Two new techniques based on the use of a time-to-amplitude converter were developed for the measurement of ?sec half-lives of daughter products, and five half-lives in the ?sec range were measured.These new ? data help to determine the trends in ?-decay energies for isotopes of odd-Z elements, particularly in the poorly defined region just above the 126-neutron shell. This allows more accurate predictions of ?-decay properties of many unknown nuclei. Some anomalous behavior of the apparent ?-decay energies for nuclei with 133 and 135 neutrons is pointed out.

Jørn Borggreen; Kalevi Valli; Earl K. Hyde

1970-11-01T23:59:59.000Z

75

UN PROCD DE DOSAGE CONTINU DU RADON DANS L'AIR ATMOSPHRIQUE. APPLICATION A LA PROSPECTION DE L'URANIUM  

E-Print Network (OSTI)

: it permits measurement of the activity of radioactive products of radon in air ; the air permits pass through176 UN PROC�D� DE DOSAGE CONTINU DU RADON DANS L'AIR ATMOSPH�RIQUE. APPLICATION A LA PROSPECTION DE radon de l'air atmo- sphérique. Une pompe à grand débit aspire l'air à analyser à travers un papier

Boyer, Edmond

76

Chemical Methods for Removing Radon and Radon Daughters from Air  

Science Journals Connector (OSTI)

...OF LUNG CANCER AMONG URANIUM MINERS, HEALTH PHYSICS 16 : 563 ( 1969...OF MINERS TO RADON, HEALTH PHYSICS 16 : 547 ( 1969...E., MORTALITY OF URANIUM MINERS IN RELATION TO...THROUGH SEPTEMBER 1967, HEALTH PHYSICS 16 : 571 ( 1969...

Lawrence Stein

1972-03-31T23:59:59.000Z

77

Search for invisible decays of Higgs bosons in the vector boson fusion and associated ZH production modes  

SciTech Connect

A search for invisible decays of Higgs bosons is performed using the vector boson fusion and associated ZH production modes. In the ZH mode, the Z boson is required to decay to a pair of charged leptons or a b b-bar quark pair. The searches use the 8 TeV pp collision dataset collected by the CMS detector at the LHC, corresponding to an integrated luminosity of up to 19.7 inverse femtobarns. Certain channels include data from 7 TeV collisions corresponding to an integrated luminosity of 4.9 inverse femtobarns. The searches are sensitive to non-standard-model invisible decays of the recently observed Higgs boson, as well as additional Higgs bosons with similar production modes and large invisible branching fractions. In all channels, the observed data are consistent with the expected standard model backgrounds. Limits are set on the production cross section times invisible branching fraction, as a function of the Higgs boson mass, for the vector boson fusion and ZH production modes. By combining all channels, and assuming standard model Higgs boson cross sections and acceptances, the observed (expected) upper limit on the invisible branching fraction at m[H] = 125 GeV is found to be 0.58 (0.44) at 95% confidence level. We interpret this limit in terms of a Higgs-portal model of dark matter interactions.

Chatrchyan, Serguei; et. al,

2014-08-01T23:59:59.000Z

78

Search for invisible decays of Higgs bosons in the vector boson fusion and associated ZH production modes  

E-Print Network (OSTI)

A search for invisible decays of Higgs bosons is performed using the vector boson fusion and associated ZH production modes. In the ZH mode, the Z boson is required to decay to a pair of charged leptons or a b b-bar quark pair. The searches use the 8 TeV pp collision dataset collected by the CMS detector at the LHC, corresponding to an integrated luminosity of up to 19.7 inverse femtobarns. Certain channels include data from 7 TeV collisions corresponding to an integrated luminosity of 4.9 inverse femtobarns. The searches are sensitive to non-standard-model invisible decays of the recently observed Higgs boson, as well as additional Higgs bosons with similar production modes and large invisible branching fractions. In all channels, the observed data are consistent with the expected standard model backgrounds. Limits are set on the production cross section times invisible branching fraction, as a function of the Higgs boson mass, for the vector boson fusion and ZH production modes. By combining all channels, and assuming standard model Higgs boson cross sections and acceptances, the observed (expected) upper limit on the invisible branching fraction at m[H] = 125 GeV is found to be 0.58 (0.44) at 95% confidence level. We interpret this limit in terms of a Higgs-portal model of dark matter interactions.

CMS Collaboration

2014-04-04T23:59:59.000Z

79

Baryon resonance production and dielectron decays in proton-proton collisions at 3.5 GeV  

E-Print Network (OSTI)

We report on baryon resonance production and decay in proton-proton collisions at a kinetic energy of $3.5$ GeV based on data measured with HADES. The exclusive channels $pp \\rightarrow np\\pi^{+}$ and $pp \\rightarrow pp\\pi^{0}$ as well as $pp \\rightarrow ppe^{+}e^{-}$ are studied simultaneously for the first time. The invariant masses and angular distributions of the pion-nucleon systems were studied and compared to simulations based on a resonance model ansatz assuming saturation of the pion production by an incoherent sum of baryonic resonances (R) with masses $<2~$ GeV/$c^2$. A very good description of the one-pion production is achieved allowing for an estimate of individual baryon-resonance production-cross-sections which are used as input to calculate the dielectron yields from $R\\rightarrow pe^+e^-$ decays. Two models of the resonance decays into dielectrons are examined assuming a point-like $RN \\gamma^*$ coupling and the dominance of the $\\rho$ meson. The results of model calculations are compared to data from the exclusive $ppe^{+}e^{-}$ channel by means of the dielectron and $pe^+e^-$ invariant mass distributions.

G. Agakishiev; A. Balanda; D. Belver; A. Belyaev; J. C. Berger-Chen; A. Blanco; M. Böhmer; J. L. Boyard; P. Cabanelas; S. Chernenko; A. Dybczak; E. Epple; L. Fabbietti; O. Fateev; P. Finocchiaro; P. Fonte; J. Friese; I. Fröhlich; T. Galatyuk; J. A. Garzón; R. Gernhäuser; K. Göbel; M. Golubeva; D. González-Díaz; F. Guber; M. Gumberidze; T. Heinz; T. Hennino; R. Holzmann; A. Ierusalimov; I. Iori; A. Ivashkin; M. Jurkovic; B. Kämpfer; T. Karavicheva; I. König; W. König; B. W. Kolb; G. Kornakov; R. Kotte; A. Krása; F. Krizek; R. Krücken; H. Kuc; W. Kühn; A. Kugler; A. Kurepin; V. Ladygin; R. Lalik; S. Lang; K. Lapidus; A. Lebedev; T. Liu; L. Lopes; M. Lorenz; L. Maier; A. Mangiarotti; J. Markert; V. Metag; B. Michalska; J. Michel; C. Müntz; L. Naumann; Y. C. Pachmayer; M. Pa\\lka; Y. Parpottas; V. Pechenov; O. Pechenova; J. Pietraszko; W. Przygoda; B. Ramstein; A. Reshetin; A. Rustamov; A. Sadovsky; P. Salabura; A. Schmah; E. Schwab; J. Siebenson; Yu. G. Sobolev; S. Spataro; B. Spruck; H. Ströbele; J. Stroth; C. Sturm; A. Tarantola; K. Teilab; P. Tlusty; M. Traxler; R. Trebacz; H. Tsertos; T. Vasiliev; V. Wagner; M. Weber; C. Wendisch; J. Wüstenfeld; S. Yurevich; Y. Zanevsky

2014-03-28T23:59:59.000Z

80

Search for resonant production of tt? decaying to jets in pp? collisions at ?{s}=1.96 TeV  

This Letter reports a search for non-standard model topquark resonances, Z', decaying to ttMs; ?W+bW-b? , where both W decay to quarks. We examine the top-antitop quark invariant mass spectrum for the presence of narrow resonant states. The search uses a data sample of p{bar p} collisions at a center of mass energy of 1.96 TeV collected by the CDF II detector at the Fermilab Tevatron, with an integrated luminosity of 2.8 fb-1. No evidence for top-antitop quark resonant production is found. We place upper limits on the production cross section times branching ratio for a specific topcolor assisted technicolor model with width of ?Z' = 0.012 MZ'. Within this model, we exclude Z' boson with masses below 805 GeV/c2 at the 95% confidence level.

Aaltonen, T [Helsinki Inst. of Phys.; Alvarez Gonzalez, B [Oviedo U.; Cantabria Inst. of Phys.; Amerio, S [INFN, Padua; Amidei, D [Michigan U.; Anastassov, A [Northwestern U.; Annovi, A [Frascati; Antos, J [Comenius U.; Apollinari, G [Fermilab; Appel, J A [Fermilab; Apresyan, A [Purdue U.; Arisawa, T [Waseda U.; Dubna, JINR

2011-10-11T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Radon - HPMC Occupational Health Services  

NLE Websites -- All DOE Office Websites (Extended Search)

Awareness Cold and Flu Prevention Hand Washing Healthy Sleep Heat Stress Radon Signs of a Heart Attack Signs of a Stroke Distracted Driving Coping with Stress & Change Skin Cancer...

82

Radon Content of the Atmosphere  

Science Journals Connector (OSTI)

... preliminary work. The absence of levels of a higher order suggests that the contribution of radon from this source does not represent a significant addition to the total atmospheric level. ... Domestic 0.70

W. ANDERSON; R. C. TURNER

1956-07-28T23:59:59.000Z

83

Radon programmes and health marketing  

Science Journals Connector (OSTI)

......programmes and projects Radon programmes and health marketing Ivana Fojtikova * Katerina Rovenska * Corresponding...basis? One possible way is to employ health marketing that draws together traditional marketing theories and science-based strategies to......

Ivana Fojtikova; Katerina Rovenska

2011-05-01T23:59:59.000Z

84

Radon Content of the Air  

Science Journals Connector (OSTI)

... namely, 0.009 and 0.018 micron. Hence it is not surprising that the radon values for the atmosphere as deduced from the filter paper method are too low. ... Bartholomew s Hospital in London a mean value of 0.94 x 10-16 curie radon/ml., and for May of the same year 0.28 x 10-16 curie ...

F. B?HOUNEK; M. MAJEROVÁ

1956-12-29T23:59:59.000Z

85

Cold Fusion Production and Decay of Neutron-Deficient Isotopes of Dubnium and Development of Extraction Systems for Group V Elements  

E-Print Network (OSTI)

of transfermium elements in cold fusion reactions." Physical1. Introduction Part I: Cold Fusion Production and Decay of1.2. Hot versus Cold Fusion 1.3. Excitation Functions 1.3.1.

Gates, Jacklyn M.

2008-01-01T23:59:59.000Z

86

Measurements of fiducial and differential cross sections for Higgs boson production in the diphoton decay channel at ?s = 8 TeV with ATLAS  

E-Print Network (OSTI)

Measurements of fiducial and differential cross sections are presented for Higgs boson production in proton-proton collisions at a centre-of-mass energy of ?s = 8 TeV. The analysis is performed in the H ? ?? decay channel ...

Taylor, Frank E.

87

Inclusive Search for Standard Model Higgs Boson Production in the WW Decay Channel using the CDF II Detector  

E-Print Network (OSTI)

We present a search for standard model (SM) Higgs boson production using ppbar collision data at sqrt(s) = 1.96 TeV, collected with the CDF II detector and corresponding to an integrated luminosity of 4.8 fb-1. We search for Higgs bosons produced in all processes with a significant production rate and decaying to two W bosons. We find no evidence for SM Higgs boson production and place upper limits at the 95% confidence level on the SM production cross section (sigma(H)) for values of the Higgs boson mass (m_H) in the range from 110 to 200 GeV. These limits are the most stringent for m_H > 130 GeV and are 1.29 above the predicted value of sigma(H) for mH = 165 GeV.

The CDF Collaboration; T. Aaltonen

2010-02-17T23:59:59.000Z

88

Light sfermion interplay in the 125 GeV MSSM Higgs production and decay at the LHC  

E-Print Network (OSTI)

We study the effects from light sfermions on the lightest Higgs boson production and decay at the Large Hadron Collider (LHC) within the Minimal Supersymmetric Standard Model (MSSM). We find that the scenario with light coloured sfermions -- stops or sbottoms -- has the potential to explain a non-universal alteration, as hinted by LHC data, of the gluon-gluon Fusion ($\\mu_{ggF}$) with respect to the Vector Boson Fusion ($\\mu_{VBF}$) event rates and, in particular, can predict $\\frac{\\mu_{VBF}}{\\mu_{ggF}}>1$ for all Higgs boson decay channels in large areas of the parameter space. We also find that the scenario with a light stop/sbottom can be complemented by the scenario in which the total Higgs width, $\\Gamma_{\\rm tot}$, is reduced due to a suppressed Yukawa coupling $Y_b$. In this case, the reduction of the Higgs production rates in the $ggF$ process which occurs in the maximal mixing scenario is compensated by the reduction of the $H\\to b\\bar{b}$ partial decay width, the largest component of $\\Gamma_{\\rm t...

Belyaev, Alexander; Moretti, Stefano; Thomas, Marc

2013-01-01T23:59:59.000Z

89

Search for Production of Invisible Final States in Single-Photon Decays of Upsilon(1S)  

E-Print Network (OSTI)

We search for single-photon decays of the Upsilon(1S) resonance, Upsilon->gamma+invisible, where the invisible state is either a particle of definite mass, such as a light Higgs boson A0, or a pair of dark matter particles, chi chi-bar. Both A0 and chi are assumed to have zero spin. We tag Upsilon(1S) decays with a dipion transition Upsilon(2S)->pi+pi-Upsilon(1S) and look for events with a single energetic photon and significant missing energy. We find no evidence for such processes in the mass range m_A0<=9.2 GeV and m_chi<=4.5 GeV in the sample of 98e6 Upsilon(2S) decays collected with the BaBar detector and set stringent limits on new physics models that contain light dark matter states.

P. del Amo Sanchez

2010-07-27T23:59:59.000Z

90

Search for Production of Invisible Final States in Single-Photon Decays of Gamma(1S)  

E-Print Network (OSTI)

We search for single-photon decays of the ?(1S) resonance, ???+invisible, where the invisible state is either a particle of definite mass, such as a light Higgs boson A[superscript 0], or a pair of dark matter particles, ...

Cowan, Ray Franklin

91

Production and decay mechanism of the B meson and the ?? system in ?+p interactions at 5 GeV/c  

Science Journals Connector (OSTI)

The production and decay properties of the B meson are studied in the reaction ?+p???+p at 5 GeV/c, where a cross section of 98±16 ?b is found for the final state pB+. The production angular distribution of the B+ shows a forward peak, a possible shoulder at t??0.25 GeV2, and a small backward peak. The most likely spin-parity assignment for the B is found to be 1+, and the D-wave fraction in the B decay is ? 11%. The differential cross section and density matrix elements of the B+ suggest a dominant ?-exchange contribution. The suppression of A2 exchange is also apparent in a study of the reaction ?+p?B0?++. We obtain for tp??<1 GeV2 an estimated cross section of 15±12 ?b for B0?++ production, which is about 5 times smaller than that of pB+ at the same t? region. The reaction ?????, extrapolated to the pion pole, is found to yield near the ?? threshold cross sections smaller than previously expected.

U. Karshon; G. Mikenberg; Y. Eisenberg; S. Pitluck; E. E. Ronat; A. Shapira; G. Yekutieli

1974-12-01T23:59:59.000Z

92

? decay of the very neutron-deficient isotopes 197–199Fr  

Science Journals Connector (OSTI)

Decay properties of the very neutron-deficient isotopes 197–199Fr were studied at the velocity filter Separator for Heavy Ion reaction Products (SHIP) at GSI in Darmstadt. The isotopes were produced in the 2n–4n evaporation channels of the fusion-evaporation reaction 60Ni+141Pr ? 201Fr*. Improved ?-decay properties of 199Fr were determined and the possible existence of two ?-decaying states in this nucleus is discussed. For the isotope 198Fr a broad ?-decay energy distribution was detected in the range of (7470–7930) keV and two ?-decaying states were observed with half-lives of 1.1(7) and 15(3) ms. The new isotope 197Fr was identified based on the observation of one ?-decay chain yielding E?=7728(15) keV and T1/2=0.6?0.3+3.0 ms. The systematics of reduced ?-decay widths are presented for neutron-deficient francium, radon, and astatine isotopes.

Z. Kalaninová; A. N. Andreyev; S. Antalic; F. P. Heßberger; D. Ackermann; B. Andel; M. C. Drummond; S. Hofmann; M. Huyse; B. Kindler; J. F. W. Lane; V. Liberati; B. Lommel; R. D. Page; E. Rapisarda; K. Sandhu; Š. Šáro; A. Thornthwaite; P. Van Duppen

2013-04-29T23:59:59.000Z

93

Characterizing the source of radon indoors  

SciTech Connect

Average indoor radon concentrations range over more than two orders of magnitude, largely because of variability in the rate at which radon enters from building materials, soil, and water supplies. Determining the indoor source magnitude requires knowledge of the generation of radon in source materials, its movement within materials by diffusion and convection, and the means of its entry into buildings. This paper reviews the state of understanding of indoor radon sources and transport. Our understanding of generation rates in and movement through building materials is relatively complete and indicates that, except for materials with unusually high radionuclide contents, these sources can account for observed indoor radon concentrations only at the low end of the range observed. Our understanding of how radon enters buildings from surrounding soil is poorer, however recent experimental and theoretical studies suggest that soil may be the predominant source in many cases where the indoor radon concentration is high. 73 references, 3 figures, 1 table.

Nero, A.V.; Nazaroff, W.W.

1983-09-01T23:59:59.000Z

94

Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs  

Science Journals Connector (OSTI)

Abstract Constraints are presented on the total width of the recently discovered Higgs boson, ? H , using its relative on-shell and off-shell production and decay rates to a pair of Z bosons, where one Z boson decays to an electron or muon pair, and the other to an electron, muon, or neutrino pair. The analysis is based on the data collected by the CMS experiment at the LHC in 2011 and 2012, corresponding to integrated luminosities of 5.1   fb ? 1 at a center-of-mass energy s = 7   TeV and 19.7   fb ? 1 at s = 8   TeV . A simultaneous maximum likelihood fit to the measured kinematic distributions near the resonance peak and above the Z-boson pair production threshold leads to an upper limit on the Higgs boson width of ? H < 22   MeV at a 95% confidence level, which is 5.4 times the expected value in the standard model at the measured mass of m H = 125.6   GeV .

2014-01-01T23:59:59.000Z

95

Radon programme: presence and future  

Science Journals Connector (OSTI)

......basement and ground floor, one-third...house, subsoil water level, construction...provide subsidy for remediation. The radon issue...protection) and remediation of existing exposure...providers of water are enforced...material and water at the market...to 4000) for remediation. The system......

J. Hulka

2008-06-01T23:59:59.000Z

96

Indoor radon: the deadliest pollutant  

Science Journals Connector (OSTI)

...chance to seep from the ground into homes in lethal...outdoor air, drinking water, and food (hatched...The most effective remediation approach is to reverse...a prominent radon remediation con-sultant in Mississauga...operator graded the ground before the basement...

RA Kerr

1988-04-29T23:59:59.000Z

97

Production and decay properties of the 1.9-s isomeric state in {sup 261}Rf  

SciTech Connect

The 1.9-s isomeric state ({sup 261}Rf{sup b}) in {sup 261}Rf was directly populated in the {sup 248}Cm({sup 18}O,5n){sup 261}Rf{sup b} reaction. Alpha and spontaneous fission (SF) decays of {sup 261}Rf{sup b}, as well as the 68-s state {sup 261}Rf{sup a}, was investigated with a rotating wheel apparatus under low background conditions attained by a gas-jet transport system coupled to the RIKEN gas-filled recoil ion separator. An identification of {sup 261}Rf{sup b} was based on {alpha}-{alpha} correlations linking {alpha} decays of {sup 261}Rf{sup b} and its daughter {sup 257}No. The {alpha}-particle energy of {sup 261}Rf{sup b} was measured to be 8.52 {+-} 0.05 MeV. The half-life was determined to be 1.9 {+-} 0.4 s based on both 8.52-MeV {alpha} and SF decays. The {alpha} and SF branches are 0.27 {+-} 0.06 and 0.73 {+-} 0.06, respectively. The cross section for the {sup 248}Cm({sup 18}O,5n){sup 261}Rf{sup b} reaction is {sigma}({sup 261}Rf{sup b}) = 11 {+-} 2 nb at 95.1 MeV, which gives a cross-section ratio of {sigma}({sup 261}Rf{sup a})/{sigma}({sup 261}Rf{sup b}) = 1.1 {+-} 0.2.

Haba, H.; Kaji, D.; Kikunaga, H.; Kudou, Y.; Morimoto, K.; Morita, K.; Ozeki, K.; Sumita, T.; Yoneda, A.; Kasamatsu, Y.; Komori, Y.; Ooe, K.; Shinohara, A. [Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198 (Japan); Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043 (Japan)

2011-03-15T23:59:59.000Z

98

Radon remediation and prevention status in 23 European countries  

Science Journals Connector (OSTI)

......mostly occurs at home. Existing...moreover, the average radon concentration...potential impact on energy consumption (qualitative...potential impact on energy consumption are not addressed...the national average radon concentration...Radon in homes and risk of......

O. Holmgren; H. Arvela; B. Collignan; M. Jiránek; W. Ringer

2013-12-01T23:59:59.000Z

99

Radon and Lung Cancer in the American Cancer Society Cohort  

Science Journals Connector (OSTI)

...Porstendorfer J , Reineking A.Radon: characteristics in...conversion coefficients for radon progeny for different...Epidemiology Reanalysis Project.Cambridge, MA:Health...Health Organization.International classification of diseases...gov/IEP/high-radon/files.html . 24...

Michelle C. Turner; Daniel Krewski; Yue Chen; C. Arden Pope III; Susan Gapstur; and Michael J. Thun

2011-03-01T23:59:59.000Z

100

Search for invisibly decaying Higgs bosons in e+e- -> Zoho production at sqrt(s) = 183 - 209 GeV  

E-Print Network (OSTI)

A search is performed for Higgs bosons decaying into invisible final states, produced in association with a Zo boson in e+e- collisions at energies between 183 and 209 GeV. The search is based on data samples collected by the OPAL detector at LEP corresponding to an integrated luminosity of about 660 pb-1. The analysis aims to select events containing the hadronic decay products of the Zo boson and large missing momentum, as expected from Higgs boson decay into a pair of stable weakly interacting neutral particles, such as the lightest neutralino in the Minimal Supersymmetric Standard Model. The same analysis is applied to a search for nearly invisible Higgs boson cascade decays into stable weakly interacting neutral particles. No excess over the expected background from Standard Model processes is observed. Limits on the production of invisibly decaying Higgs bosons produced in association with a Zo boson are derived. Assuming a branching ratio BR(ho->invisible)=1, a lower limit of 108.2 GeV is placed on the Higgs boson mass at the 95% confidence level. Limits on the production of nearly invisibly decaying Higgs bosons are also obtained.

The OPAL collaboration

2007-07-03T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Non-Thermal Production of Wino Dark Matter via the Decay of Long-Lived Particles  

E-Print Network (OSTI)

We consider supersymmetric models in which the neutral Wino is the lightest superparticle (LSP), and study the possibility that non-thermally produced Wino plays the role of dark matter. The thermal relic density of Wino is smaller than the present mass density of dark matter if wino mass is smaller than 2.9 TeV; however, even with smaller Wino mass, Wino can be the dominant component of dark matter if it is non-thermally produced by the decay of an exotic particle. In order to study such a possibility in detail, we perform a precise calculation of the present mass density of Wino produced by the exotic-particle decay, taking account of the following effects: (i) coannihilation among charged and neutral Winos, and (ii) Sommerfeld effect on the pair annihilation cross section of Winos. We consider several well-motivated cases where the exotic particle corresponds to cosmological moduli fields, gravitino, or axino, and discuss the implication of the Wino LSP for these cases.

Takeo Moroi; Minoru Nagai; Masahiro Takimoto

2013-03-05T23:59:59.000Z

102

Studies of multiparticle production in hadronic Z{sup 0} decays  

SciTech Connect

Hadronic decays of Z{sup 0} bosons produced in e{sup +}e{sup {minus}} annihilation are ideal for testing QCD. This thesis presents a measurement of the charged-particle multiplicity distribution and the first experimental study of the ratio of cumulant to factorial moments, using hadronic Z{sup 0} decays collected by the SLD experiment at SLAC. The author finds that this ratio, as a function of the moment-rank q, decreases sharply to a negative minimum at q = 5, which is followed by quasi-oscillations. These features are in qualitative agreement with expectations from higher-order perturbative QCD. The author also presents an analysis of the intermittency in rapidity phase space using the method of scaled factorial moments. It is found that both parton cascade and hard-gluon radiations contribute to the growth of the moments by studying the event-shape and jet-topology dependencies. All aspects of the data appear to be reproduced reasonably well by the QCD-based Monte Carlo model.

Jingchen Zhou

1996-12-01T23:59:59.000Z

103

Bounds on Invisible Higgs boson Decays from $t\\bar{t}H$ Production  

E-Print Network (OSTI)

We present an upper bound on the branching fraction of the Higgs boson to invisible particles, by recasting a CMS search for stop quarks decaying to $t\\bar{t}+\\missET$. The observed (expected) bound, BF($H\\rightarrow$inv.$)<0. 40 (0.65)$ at 95\\% CL, is the strongest direct limit to date, benefiting from a downward fluctuation in the CMS data in that channel. In addition, we combine this new constraint with existing published constraints to give an observed (expected) bound of BF($H\\rightarrow$inv.$)<0. 40 (0.40)$ at 95\\% CL, and show some of the implications for theories of dark matter which communicate through the Higgs portal.

Ning Zhou; Zepyoor Khechadoorian; Daniel Whiteson; Tim Tait

2014-07-31T23:59:59.000Z

104

SWOT analysis of the Czech Radon programme  

Science Journals Connector (OSTI)

......raising radon awareness and risk perception among the...3). To avoid this risk, new solutions and new...government departments (political subsidy), cooperation...underestimate the radon risk The positive influence...Low concern of banks, insurance companies and real estate......

I. Fojtíková

2014-07-01T23:59:59.000Z

105

An overview of Ireland's National Radon Policy  

Science Journals Connector (OSTI)

......for radon in drinking water of 500 Bq m3 and 1000 Bq m3 for public and private water supplies, respectively...the duty of care that a water supplier has towards...carried out in 38 531 ground floor classrooms and...extensive and successful remediation programme to reduce radon......

S. Long; D. Fenton

2011-05-01T23:59:59.000Z

106

Measurement of Radon in Soil Gas  

Science Journals Connector (OSTI)

... CONCENTRATIONS of the order of 100,000-1,000,000 pc. radon/m3 are found in the gases trapped in common soils and rock1. The estimation ... m3 are found in the gases trapped in common soils and rock1. The estimation of radon in the soil gas and the free atmosphere has been suggested as a tool for ...

K. G. VOHRA; M. C. SUBBARAMU; A. M. MOHAN RAO

1964-01-04T23:59:59.000Z

107

Concentration of Atmospheric Radon and Wind Direction  

Science Journals Connector (OSTI)

... in Lisbon, near the sea, is therefore excellent to test any probable relationship between radon concentration and wind directions since only half the possible wind directions are continental ones, ... since only half the possible wind directions are continental ones, therefore corresponding probably to higher radon concentrations. In order to study any correlation, the concentration of ...

F. BARREIRA

1961-06-17T23:59:59.000Z

108

The Radon Content of the Atmosphere  

Science Journals Connector (OSTI)

... MEASUREMENTS of the radon content of the atmosphere were made so long ago as 1905 by Eve1-2 in ... whole seemed to support the original suggestion of Elster and Geitel6 in 1903 that the radon in the atmosphere arises mainly from the soil. These workers noted that the highest ...

W. ANDERSON; W. V. MAYNEORD; R. C. TURNER

1954-09-04T23:59:59.000Z

109

Radon emanation on San Andreas Fault  

Science Journals Connector (OSTI)

... RADON is constantly emanated from the Earth into its atmosphere, normally in minute amounts. ... is constantly emanated from the Earth into its atmosphere, normally in minute amounts. Radon emanation is known to be anomalously large on active faults and to show temporal variations ...

Chi-Yu King

1978-02-09T23:59:59.000Z

110

Earth science: Radon and rock deformation  

Science Journals Connector (OSTI)

... crustal deformation. This ‘unproven’ category includes the well-documented precursory decrease and increase of radon concentration before the 1978 Izu-Oshima earthquake in Japan (Fig. 1), as well ... local electric field. Trique et al. now report that various phenomena — bursts of radon gas, changes of electric potential, and departures of ground tilt from that predicted on ...

Evelyn Roeloffs

1999-05-13T23:59:59.000Z

111

Determination of Radon and Thoron in Air  

Science Journals Connector (OSTI)

... A method for determination of radon favoured by the later investigators has been filtration of about 1 cubic metre of air ... of the activity found on the filter using a particle counter or ionization chamber ; radon passes through the filter and the short-lived activity observed is that of the four ...

G. B. COURTIER

1957-08-24T23:59:59.000Z

112

Radon and the risks of cancer  

Science Journals Connector (OSTI)

... of April, Denis Henshaw and colleagues1 published their finding of significant correlations between average indoor radon levels in different countries and the incidence of leukaemia and other cancers in children, ... a similar correlation for prostatic cancer2. Significant regional correlations have also been reported between indoor radon and acute myeloid leukaemia in Britain3 and Canada1.

Julian Peto

1990-05-31T23:59:59.000Z

113

Measurements of B[subscript c][superscript +] Production and Mass with the B[subscript c][superscript +]?J/??[superscript +] Decay  

E-Print Network (OSTI)

Measurements of B[subscript c][superscript +] production and mass are performed with the decay mode B[subscript c][superscript +]?J/??[superscript +] using 0.37??fb[superscript -1] of data collected in pp collisions at ...

Williams, Michael

114

Beauty production in pp collisions at $\\sqrt{s}$ = 2.76 TeV measured via semi-electronic decays  

E-Print Network (OSTI)

The ALICE collaboration at the LHC reports measurement of the inclusive production cross section of electrons from semi-leptonic decays of beauty hadrons with rapidity $|y|Electrons not originating from semi-electronic decay of beauty hadrons are suppressed using the impact parameter of the corresponding tracks. The production cross section of beauty decay electrons is compared to the result obtained with an alternative method which uses the distribution of the azimuthal angle between heavy-flavour decay electrons and charged hadrons. Perturbative QCD calculations agree with the measured cross section within the experimental and theoretical uncertainties. The integrated visible cross section, $\\sigma_{\\mathrm{b} \\rightarrow \\mathrm{e}} = 3.47\\pm0.40(\\mathrm{stat})^{+1.12}_{-1.33}(\\mathrm{sys})\\pm0.07(\\mathrm{norm}) \\mu$b, was extrapolated to full phase space using Fixed Order plus Next-to-Leading Log (FONLL) predictions to obtain the total b$\\bar{\\mathrm{b}}$ production cross section, $\\sigma_{\\mathrm{b\\bar{b}}} = 130\\pm15.1(\\mathrm{stat})^{+42.1}_{-49.8}(\\mathrm{sys})^{+3.4}_{-3.1}(\\mathrm{extr})\\pm2.5(\\mathrm{norm})\\pm4.4(\\mathrm{BR}) \\mu$b.

The ALICE Collaboration

2014-05-16T23:59:59.000Z

115

Search for WH production with a light Higgs boson decaying to prompt electron-jets in proton–proton collisions at  TeV with the ATLAS detector  

Science Journals Connector (OSTI)

A search is performed for WH production with a light Higgs boson decaying to hidden-sector particles resulting in clusters of collimated electrons, known as electron-jets. The search is performed with 2.04 fb?1 of data collected in 2011 with the ATLAS detector at the Large Hadron Collider in proton–proton collisions at . One event satisfying the signal selection criteria is observed, which is consistent with the expected background rate. Limits on the product of the WH production cross section and the branching ratio of a Higgs boson decaying to prompt electron-jets are calculated as a function of a Higgs boson mass in the range from 100 to 140 GeV.

G Aad; T Abajyan; B Abbott; J Abdallah; S Abdel Khalek; A A Abdelalim; O Abdinov; R Aben; B Abi; M Abolins; O S AbouZeid; H Abramowicz; H Abreu; B S Acharya; L Adamczyk; D L Adams; T N Addy; J Adelman; S Adomeit; P Adragna; T Adye; S Aefsky; J A Aguilar-Saavedra; M Agustoni; S P Ahlen; F Ahles; A Ahmad; M Ahsan; G Aielli; T P A Åkesson; G Akimoto; A V Akimov; M A Alam; J Albert; S Albrand; M Aleksa; I N Aleksandrov; F Alessandria; C Alexa; G Alexander; G Alexandre; T Alexopoulos; M Alhroob; M Aliev; G Alimonti; J Alison; B M M Allbrooke; L J Allison; P P Allport; S E Allwood-Spiers; J Almond; A Aloisio; R Alon; A Alonso; F Alonso; A Altheimer; B Alvarez Gonzalez; M G Alviggi; K Amako; C Amelung; V V Ammosov; S P Amor Dos Santos; A Amorim; S Amoroso; N Amram; C Anastopoulos; L S Ancu; N Andari; T Andeen; C F Anders; G Anders; K J Anderson; A Andreazza; V Andrei; X S Anduaga; S Angelidakis; P Anger; A Angerami; F Anghinolfi; A Anisenkov; N Anjos; A Annovi; A Antonaki; M Antonelli; A Antonov; J Antos; F Anulli; M Aoki; S Aoun; L Aperio Bella; R Apolle; G Arabidze; I Aracena; Y Arai; A T H Arce; S Arfaoui; J-F Arguin; S Argyropoulos; E Arik; M Arik; A J Armbruster; O Arnaez; V Arnal; A Artamonov; G Artoni; D Arutinov; S Asai; S Ask; B Åsman; L Asquith; K Assamagan; R Astalos; A Astbury; M Atkinson; B Auerbach; E Auge; K Augsten; M Aurousseau; G Avolio; D Axen; G Azuelos; Y Azuma; M A Baak; G Baccaglioni; C Bacci; A M Bach; H Bachacou; K Bachas; M Backes; M Backhaus; J Backus Mayes; E Badescu; P Bagnaia; Y Bai; D C Bailey; T Bain; J T Baines; O K Baker; S Baker; P Balek; F Balli; E Banas; P Banerjee; Sw Banerjee; D Banfi; A Bangert; V Bansal; H S Bansil; L Barak; S P Baranov; T Barber; E L Barberio; D Barberis; M Barbero; D Y Bardin; T Barillari; M Barisonzi; T Barklow; N Barlow; B M Barnett; R M Barnett; A Baroncelli; G Barone; A J Barr; F Barreiro; J Barreiro Guimarães da Costa; R Bartoldus; A E Barton; V Bartsch; A Basye; R L Bates; L Batkova; J R Batley; A Battaglia; M Battistin; F Bauer; H S Bawa; S Beale; T Beau; P H Beauchemin; R Beccherle; P Bechtle; H P Beck; K Becker; S Becker; M Beckingham; K H Becks; A J Beddall; A Beddall; S Bedikian; V A Bednyakov; C P Bee; L J Beemster; M Begel; S Behar Harpaz; C Belanger-Champagne; P J Bell; W H Bell; G Bella; L Bellagamba; M Bellomo; A Belloni; O Beloborodova; K Belotskiy; O Beltramello; O Benary; D Benchekroun; K Bendtz; N Benekos; Y Benhammou; E Benhar Noccioli; J A Benitez Garcia; D P Benjamin; M Benoit; J R Bensinger; K Benslama; S Bentvelsen; D Berge; E Bergeaas Kuutmann; N Berger; F Berghaus; E Berglund; J Beringer; P Bernat; R Bernhard; C Bernius; F U Bernlochner; T Berry; C Bertella; A Bertin; F Bertolucci; M I Besana; G J Besjes; N Besson; S Bethke; W Bhimji; R M Bianchi; L Bianchini; M Bianco; O Biebel; S P Bieniek; K Bierwagen; J Biesiada; M Biglietti; H Bilokon; M Bindi; S Binet; A Bingul; C Bini; C Biscarat; B Bittner; C W Black; J E Black; K M Black; R E Blair; J-B Blanchard; T Blazek; I Bloch; C Blocker; J Blocki; W Blum; U Blumenschein; G J Bobbink; V S Bobrovnikov; S S Bocchetta; A Bocci; C R Boddy; M Boehler; J Boek; T T Boek; N Boelaert; J A Bogaerts; A Bogdanchikov; A Bogouch; C Bohm; J Bohm; V Boisvert; T Bold; V Boldea; N M Bolnet; M Bomben; M Bona; M Boonekamp; S Bordoni; C Borer; A Borisov; G Borissov; I Borjanovic; M Borri; S Borroni; J Bortfeldt; V Bortolotto; K Bos; D Boscherini; M Bosman; H Boterenbrood; J Bouchami; J Boudreau; E V Bouhova-Thacker; D Boumediene; C Bourdarios; N Bousson; S Boutouil; A Boveia; J Boyd; I R Boyko; I Bozovic-Jelisavcic; J Bracinik; P Branchini; A Brandt; G Brandt; O Brandt; U Bratzler; B Brau; J E Brau; H M Braun; S F Brazzale; B Brelier; J Bremer; K Brendlinger; R Brenner; S Bressler; T M Bristow; D Britton; F M Brochu; I Brock; R Brock; F Broggi; C Bromberg; J Bronner; G Brooijmans; T Brooks; W K Brooks; G Brown; P A Bruckman de Renstrom; D Bruncko; R Bruneliere; S Brunet; A Bruni; G Bruni; M Bruschi; L Bryngemark; T Buanes; Q Buat; F Bucci; J Buchanan; P Buchholz; R M Buckingham; A G Buckley; S I Buda; I A Budagov; B Budick; L Bugge; O Bulekov; A C Bundock; M Bunse; T Buran; H Burckhart; S Burdin; T Burgess; S Burke; E Busato; V Büscher; P Bussey; C P Buszello; B Butler; J M Butler; C M Buttar; J M Butterworth; W Buttinger; M Byszewski; S Cabrera Urbán; D Caforio; O Cakir; P Calafiura; G Calderini; P Calfayan; R Calkins; L P Caloba; R Caloi; D Calvet; S Calvet; R Camacho Toro; P Camarri; D Cameron; L M Caminada; R Caminal Armadans; S Campana; M Campanelli; V Canale; F Canelli; A Canepa; J Cantero; R Cantrill; T Cao; M D M Capeans Garrido; I Caprini; M Caprini; D Capriotti; M Capua; R Caputo; R Cardarelli; T Carli; G Carlino; L Carminati; S Caron; E Carquin; G D Carrillo-Montoya; A A Carter; J R Carter; J Carvalho; D Casadei; M P Casado; M Cascella; C Caso; E Castaneda-Miranda; V Castillo Gimenez

2013-01-01T23:59:59.000Z

116

First Measurements of the Differential Cross Sections of Higgs Boson Production and Decay in the Four Lepton Final State  

E-Print Network (OSTI)

The discovery of a new scalar particle in the search for the Higgs boson at the Large Hadron Collider (LHC) was a great success for the ATLAS and CMS collaborations. Additional measurements of this new particle present opportunities to both test the Standard Model (SM) predictions for the Higgs boson and to search for non-SM properties of this new particle. This thesis presents measurements of the mass, signal strength, and production cross sections of the Higgs boson in the $H \\rightarrow ZZ^{(*)} \\rightarrow \\ell\\ell\\ell'\\ell' $($\\ell,\\ell'=e,\\mu$) decay channel. The cross section measurements are performed using 20.3 fb$^{-1}$ of $pp$ collisions at center of mass energy $\\sqrt{s}=8$ TeV collected by the ATLAS detector and the mass and signal strength measurements are performed using an additional 4.5 fb$^{-1}$ of $pp$ collisions at $\\sqrt{s}=7$ TeV. From the data in the $H \\rightarrow4\\ell$ channel, the best estimate of the mass is $124.51~\\pm~0.52~\\rm{(stat)}~\\pm 0.06~\\rm{(syst)}$ GeV. The signal str...

Stahlman, Jonathan Mark

117

National Radon Contractor Proficiency (RCP) Program. Proficiency report, June 1991  

SciTech Connect

The primary objective of the U.S. Environmental Protection Agency's (EPA) efforts to address the indoor radon problem is to reduce radon levels in buildings throughout the country. Achieving the objective requires a nationwide supply of capable radon mitigation contractors. In the Indoor Radon Abatement Act of 1988, Congress authorized EPA to establish a program to evaluate radon mitigation contractors and to provide the information to the public in cooperation with the States. The Radon Contractor Proficiency (RCP) Program was developed to assist States, EPA Regions, local government officials, and the public in selecting contractors who have demonstrated their proficiency in reducing indoor radon levels. The program is managed by the EPA Office of Radiation Programs' Radon Division. Under the voluntary program, radon contractors demonstrate their proficiency by meeting specific Program requirements. Individual contractors who meet these requirements are then listed in periodic RCP Proficiency Reports.

Not Available

1991-06-01T23:59:59.000Z

118

QA programme for radon and its short-lived progeny measuring instruments in NRPI Prague  

Science Journals Connector (OSTI)

......radon using a radium water solution standard with...to 2 bars of absolute atmospheric pressure with a system...store tank up to normal atmospheric pressure, which is...carnauba wax aerosol generator, pump, etc.) and...carnauba wax aerosol generator, production of well-defined......

K. Jílek; J. Thomas; M. Brabec

2008-06-01T23:59:59.000Z

119

Radon Series Comp. Appl. Math 8, 129 c de Gruyter 2009 Optimal consumption and investment with  

E-Print Network (OSTI)

Radon Series Comp. Appl. Math 8, 1�29 c de Gruyter 2009 Optimal consumption and investment investment/con- sumption problem for continuous time market models. By applying results from sto- chastic, together with margin tradings on certain financial products, the exposure to losses of investments

Paris-Sud XI, Université de

120

Search for chargino and neutralino production with a Higgs boson in the decay chain in one or three leptons final state events with ATLAS  

E-Print Network (OSTI)

Searches for direct production of chargino ($\\tilde{\\chi}_1^{\\pm}$) and neutralino ($\\tilde{\\chi}_0^{2}$) leading to final states characterized by the presence of a Higgs boson are reported. Events containing missing transverse momentum and one or three leptons are selected, and various channels sensitive to different Higgs decays are considered. The analyses use 20.3 fb$^{-1}$ in $R$-parity conserving phenomenological Minimal Supersymmetric Standard Models and in simplified supersymmetric models.

David, C; The ATLAS collaboration

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Search for Resonant Pair Production of Neutral Long-Lived Particles Decaying to bb in pp Collisions at sq root(s)=1.96 TeV  

SciTech Connect

We report on a first search for resonant pair production of neutral long-lived particles (NLLP) which each decay to a bb pair, using 3.6 fb{sup -1} of data recorded with the D0 detector at the Fermilab Tevatron collider. We search for pairs of displaced vertices in the tracking detector at radii in the range 1.6-20 cm from the beam axis. No significant excess is observed above background, and upper limits are set on the production rate in a hidden-valley benchmark model for a range of Higgs boson masses and NLLP masses and lifetimes.

Abazov, V. M.; Alexeev, G. D.; Kharzheev, Y. N.; Malyshev, V. L.; Tokmenin, V. V.; Vertogradov, L. S.; Yatsunenko, Y. A. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Abbott, B.; Gutierrez, P.; Hossain, S.; Jain, S.; Rominsky, M.; Severini, H.; Skubic, P.; Strauss, M. [University of Oklahoma, Norman, Oklahoma 73019 (United States); Abolins, M.; Benitez, J. A.; Brock, R.; Edmunds, D.; Hall, I. [Michigan State University, East Lansing, Michigan 48824 (United States)

2009-08-14T23:59:59.000Z

122

Search for pair production of scalar top quarks decaying to a tau lepton and a b quark in 1.96 TeV ppbar collisions  

SciTech Connect

I present the results of a search for pair production of scalar top quarks ({tilde t}{sub 1}) in an R-parity violating supersymmetric scenario using 322 pb{sup -1} of p{bar p} collisions at {radical}s = 1.96 TeV collected by the upgraded Collider Detector at Fermilab. I assume each {tilde t}{sub 1} decays into a {tau} lepton and a b quark, with branching ratio {beta}, and search for final states containing either an electron or a muon from a leptonic {tau} decay, a hadronically decaying {tau} lepton, and two or more jets. Two candidate events pass my final selection criteria, consistent with the expectation from standard model processes. I present upper limits on the cross section times branching ratio squared {sigma}({tilde t}{sub 1}{bar {tilde t}}{sub 1}) x {beta}{sup 2} as a function of the stop mass m({tilde t}{sub 1}). Assuming {beta} = 1, I set a 95% confidence level limit m({tilde t}{sub 1}) > 153 GeV=c{sup 2}. These limits are also fully applicable to the case of a pair produced third generation scalar leptoquark that decays into a {tau} lepton and a b quark.

Khotilovich, Vadim, G.; /Texas A-M

2008-05-01T23:59:59.000Z

123

Fiducial and differential cross sections of Higgs boson production measured in the four-lepton decay channel in pp collisions at ?s = 8 TeV with the ATLAS detector  

E-Print Network (OSTI)

Measurements of fiducial and differential cross sections of Higgs boson production in the H?ZZ*?4? decay channel are presented. The cross sections are determined within a fiducial phase space and corrected for detection ...

Taylor, Frank E.

124

Generalised finite radon transform for N x N images  

Science Journals Connector (OSTI)

This paper extends the domain of the finite radon transform (FRT) to apply to square arrays of arbitrary size. The FRT is a discrete formalism of the Radon transform that assumes the image is periodic over the finite array Z"N^2 and requires only arithmetic ... Keywords: Discrete projection, Discrete radon transform, Fourier slice theorem, Image representation

Andrew Kingston; Imants Svalbe

2007-10-01T23:59:59.000Z

125

CIPANP00 / 5/00 / Quebec, CA \\Lambda c : Not your average Bearyon 1 's: Absolute production and decay rates  

E-Print Network (OSTI)

CIPANP00 / 5/00 / Quebec, CA \\Lambda c : Not your average Bearyon 1 \\Lambda c 's: Absolute / 5/00 / Quebec, CA \\Lambda c : Not your average Bearyon 2 \\Lambda c ! \\LambdaX 1. If \\Lambda c decays, this talk) #12; CIPANP00 / 5/00 / Quebec, CA \\Lambda c : Not your average Bearyon 3 Technique: Charm

126

URANIUM MILL TAILINGS RADON FLUX CALCULATIONS  

E-Print Network (OSTI)

at the Piñon Ridge Property in western Montrose County, Colorado. The Piñon Ridge Mill includesURANIUM MILL TAILINGS RADON FLUX CALCULATIONS PI�ON RIDGE PROJECT MONTROSE COUNTY, COLORADO Submitted To: Energy Fuels Resources Corporation 44 Union Boulevard, Suite 600 Lakewood, Colorado 80228

127

SWOT analysis of the Czech Radon programme  

Science Journals Connector (OSTI)

......the population in healthy housing Aggressive sales campaigns...Czech men in having their new house in good shape Builders underestimate...Davies M., Wilkinson P. Home energy efficiency and radon related risk of...in low energy and passive houses in Austria. (2012) RADPAR......

I. Fojtíková

2014-07-01T23:59:59.000Z

128

Residential radon remediation: performance over 17 years  

Science Journals Connector (OSTI)

......covering about 1000 m2. Water drains into the basin...sub-slab ventilation remediation system installed, i...sub-slab ventilation remediation (Bq mSE). Measured...concentration with height above ground level. For example...had a sub-slab radon remediation system installed that......

Naomi H. Harley; Passaporn Chittaporn; Anthony Marsicano

2011-05-01T23:59:59.000Z

129

The production and decay of the top partner $T$ in the left-right twin higgs model at the ILC and CLIC  

E-Print Network (OSTI)

The left-right twin Higgs model (LRTHM) predicts the existence of the top partner $T$. In this work, we make a systematic investigation for the single and pair production of this top partner $T$ through the processes: $e^{+}e^{-}\\to t\\ov{T} + T\\bar{t}$ and $ T\\ov{T}$, the neutral scalar (the SM-like Higgs boson $h$ or neutral pseudoscalar boson $\\phi^{0}$) associate productions $e^{+}e^{-}\\to t\\ov{T}h +T\\bar{t}h$, $T\\ov{T}h$, $t\\ov{T}\\phi^{0}+T\\bar{t}\\phi^{0}$ and $ T\\ov{T}\\phi^{0}$. From the numerical evaluations for the production cross sections and relevant phenomenological analysis we find that (a) the production rates of these processes, in the reasonable parameter space, can reach the level of several or tens of fb; (b) for some cases, the peak value of the resonance production cross section can be enhanced significantly and reaches to the level of pb; (c) the subsequent decay of $T\\to \\phi^{+}b \\to t\\bar{b}b$ may generate typical phenomenological features rather different from the signals from other new physics models beyond the standard model(SM); and (d) since the relevant SM background is generally not large, some signals of the top partner $T$ predicted by the LRTHM may be detectable in the future ILC and CLIC experiments.

Yao-Bei Liu; Zhen-Jun Xiao

2014-12-13T23:59:59.000Z

130

Radon in atmospheric studies: a review  

SciTech Connect

The distribution of the isotopes of radon in space and time, their physical characteristics, and their behavior in the dynamics of the atmosphere have presented challenges for many decades. /sup 220/Rn, /sup 222/Rn and their daughters furnish a unique set of tracers for the study of transport and mixing processes in the atmosphere. Appropriate applications of turbulent diffusion theory yield general agreement with measured profiles. Diurnal and seasonal variations follow patterns set by consideration of atmospheric stability. /sup 222/Rn has been used successfully in recent studies of nocturnal drainage winds and cumulus convection. Good results have been obtained using /sup 222/Rn and its long-lived /sup 210/Pb daughter as tracers in the study of continent-to-ocean and ocean-to-continent air mass trajectories, /sup 220/Rn (thoron) because of its short half-life of only 55 seconds has been used to measure turbulent diffusion within the first few meters of the earth's surface and to study the influence of meteorological variables on the rate of exhalation from the ground. Radon daughters attach readily to atmospheric particulate matter which makes it possible to study these aerosols with respect to size spectra, attachment characteristics, removal by gravitation and precipitation, and residence times in the troposphere. The importance of ionization by radon and its daughters in the lower atmosphere and its effect on atmospheric electrical parameters is well known. Knowledge of the mobility and other characteristics of radon daughter ions has led to applications in the study of atmospheric electrical environments under fair weather and thunderstorm conditions and in the formation of condensation nuclei. The availability of increasingly sophisticated analytical tools and atmospheric measurement systems can be expected to add much to our understanding of radon and its daughters as trace components of the atmospheric environment in the years ahead.

Wilkening, M.

1981-01-01T23:59:59.000Z

131

An investigation of radon exhalation rate and estimation of radiation doses in coal and fly ash samples  

Science Journals Connector (OSTI)

Coal is a technologically important material used for power generation. Its cinder (fly ash) is used in the manufacturing of bricks, sheets, cement, land filling etc. Coal and its by-products often contain significant amounts of radionuclides, including uranium which is the ultimate source of the radioactive gas radon. Burning of coal and the subsequent atmospheric emission cause the redistribution of toxic radioactive trace elements in the environment. In the present study, radon exhalation rates in coal and fly ash samples from the thermal power plants at Kolaghat (W.B.) and Kasimpur (U.P.) have been measured using sealed Can technique having LR-115 type II detectors. The activity concentrations of 238U, 232Th, and 40K in the samples of Kolaghat power station are also measured. It is observed that the radon exhalation rate from fly ash samples from Kolaghat is higher than from coal samples and activity concentration of radionuclides in fly ash is enhanced after the combustion of coal. Fly ash samples from Kasimpur show no appreciable change in radon exhalation. Radiation doses from the fly ash samples have been estimated from radon exhalation rate and radionuclide concentrations.

A.K. Mahur; Rajesh Kumar; Meena Mishra; D. Sengupta; Rajendra Prasad

2008-01-01T23:59:59.000Z

132

An investigation into the knowledge and attitudes towards radon testing among residents in a high radon area  

Science Journals Connector (OSTI)

The aim of this study was to investigate the knowledge and attitudes of residents in the Castleisland area to radon. Castleisland in Co. Kerry was described as a high radon area following the discovery of a house in the area with radon levels 245 times that of the national reference level. Residents in this area were then asked to measure their homes for radon in the Castleisland radon survey. The uptake of this measurement was 17%. In order to investigate this response rate further, a questionnaire was designed and distributed to residents in the Castleisland area. This questionnaire measured the testing history of the participants, the reasons for testing/not testing, the factors important to them when considering having their home tested, radon knowledge and finally intentions to measure their home for radon. It was found that the main reason people do not test their home for radon is that they believe their home does not have a problem. Optimistic bias was thought to play a role here. The subjective norm component of the theory of planned behaviour was found to have a significant independent contribution in the variation in intentions to measure one's home for radon and this in turn could be targeted to increase uptake of radon measurement in the future.

Susan Clifford; David Hevey; Gerard Menezes

2012-01-01T23:59:59.000Z

133

Ambient Radon-222 Monitoring in Amargosa Valley, Nevada  

SciTech Connect

As part of a program to characterize and baseline selected environmental parameters in the region around the proposed repository at Yucca Mountain, Nevada, ambient radon-222 monitoring was conducted in the rural community of Amargosa Valley, the community closest to the proposed repository site. Passive integrating radon monitors and a continuous radon monitoring instrument were deployed adjacent to the Community Environmental Monitoring Program (CEMP) (http://www.cemp.dri.edu/index.html) station located in the Amargosa Valley Community Center near the library. The CEMP station provided real-time ambient gamma exposure and meteorological data used to correct the integrated radon measurements as well as verify meteorological data collected by the continuous radon monitoring instrument. Additionally, different types of environmental enclosures that housed the monitors and instrument were used to determine if particular designs influenced the ambient radon measurements.

L.H. Karr; J.J. Tappen; D. Shafer; K.J. Gray

2008-06-05T23:59:59.000Z

134

High Radon Levels in Homes Spark Moves To Combat Pollutant  

Science Journals Connector (OSTI)

High Radon Levels in Homes Spark Moves To Combat Pollutant ... Federal, state agencies have initiated programs to monitor levels of this inert radioactive gas in homes in certain areas and work out control strategy ... Health care officials have been concerned about radon for more than 20 years, but public attention reached a new high recently with the discovery of high levels of radon inside homes in the New Jersey- Pennsylvania-New York area. ...

DAVID J. HANSON

1985-11-18T23:59:59.000Z

135

WHO network and international collaborative project on residential radon risk  

Science Journals Connector (OSTI)

This paper describes WHO's project on assessment of health risks from residential radon exposure and development of an evidence base for guidelines and policies for Member States. The project will assess global burden of disease associated with in-door radon exposure and provide tools for risk communication on radon risks and mitigation procedures. The purpose of the paper is to draw attention and encourage participation of the international scientific community and national authorities to the new initiative of WHO.

Zhanat Carr; Michael Repacholi

2005-01-01T23:59:59.000Z

136

Search for Resonant Pair Production of long-lived particles decaying to b anti-b in p anti-p collisions at s**(1/2) = 1.96-TeV  

SciTech Connect

We report on a first search for production of Higgs bosons decaying into neutral long-lived particles (NLLP) which each decay to a b{bar b} pair, using 3.6 fb{sup -1} of data recorded with the D0 detector at the Fermilab Tevatron collider. We search for pairs of displaced vertices in the tracking detector at radii in the range 1.6-20 cm from the beam axis. No significant excess is observed above background, and upper limits are set on the production rate in a hidden-valley benchmark model for a range of Higgs boson masses and NLLP masses and lifetimes.

Abazov, V.M.; /Dubna, JINR; Abbott, B.; /Oklahoma U.; Abolins, M.; /Michigan State U.; Acharya, B.S.; /Tata Inst.; Adams, M.; /Illinois U., Chicago; Adams, T.; /Florida State U.; Aguilo, E.; /Alberta U. /Simon Fraser U. /York U., Canada /McGill U.; Ahsan, M.; /Kansas State U.; Alexeev, G.D.; /Dubna, JINR; Alkhazov, G.; /St. Petersburg, INP; Alton, A.; /Michigan U. /Northeastern U.

2009-06-01T23:59:59.000Z

137

Preparations for Measurement of Electroweak Boson Production Cross-Sections using the Electron Decay Modes, with the Compact Muon Solenoid Detector  

E-Print Network (OSTI)

The Compact Muon Solenoid was designed to make discoveries at the TeV scale : to elucidate the nature of electroweak symmetry breaking and to search for physics beyond the Standard Model. For any such discovery to be credible, it must first be demonstrated that the CMS detector is understood. One mechanism to make this demonstration is to measure “standard candle” processes, such as W and Z production. This thesis describes preparations undertaken to make these measurements using the electron decay modes, with an integrated luminosity of 10 inverse picobarns of collision data. The energy resolution of the electromagnetic calorimeter was measured in test beam data. An improved method of deriving the optimised weights necessary for amplitude reconstruction is described. The measurement of electron charge using tracks is impaired by the electron showering in the tracker material. A novel charge measurement technique that is complementary to the existing method was assessed. Missing transverse energy is a pow...

Wardrope, D R

2009-01-01T23:59:59.000Z

138

Radon-222 progeny surface deposition and resuspension - residential materials  

SciTech Connect

In evaluating the hazards from indoor {sup 222}Rn, it is imperative that the behavior of the four short-lived particulate progeny are fully understood since they are the radioisotopes that deliver most of the radiobiological damage to occupants. One known characteristic of these radon progeny is that they deposit (plate out) onto macroscopic surfaces. Some of these plated-out atoms become resuspended when they disintegrate and decay to the next progeny, in particular, {sup 218}Po. Both of these mechanisms, plateout and resuspension, affect the airborne population of the individual daughters and their impact on the radiation energy delivered to the human respiratory system. There are two specific and separate areas of concern, One is that monitoring {sup 222} Rn levels alone, such as with charcoal canisters, is obviously not sufficient to determine the radiation dose since the daughters are never in absolute equilibrium with {sup 222}Rn. Further, from an internal dose standpoint, the {open_quotes}unattached{close_quotes} fraction (free ions) of the daughters are believed, by virtue of their deeper tissue depositions in the tracheo-bronchial tract, to deliver the greatest dose in the body. Currently, there are virtually no data on the measurements of both plateout rates and resuspension factors for specific individual residential material surfaces. This report presents experimental data of plateout rates in an indoor house for typical indoor materials. Results of measurements of resuspension factors for some of the materials are provided.

Leonard, B.E.

1994-12-31T23:59:59.000Z

139

Applications of radon distribution and radon flux for the determination of oceanic mixing and air-sea gas exchange  

E-Print Network (OSTI)

APPLICATIONS OF RADON DISTRIBUTION AND RADON FLUX FOR THE DETERS 1INATION Ol OCEANIC IvfIXING AND AIR -SEA GAS EXCHA NGE A Thesis by ROBERT I. EWIS BREWER Submitted to the Graduate College oi T e xa s A '4 I'. 1 Univ c r s i ty in partial... luiiillment of the requirement for the degree of KIASTER OF SCIENCE May 1977 Major Subject: Oceanography APPLICATIONS OF RADON DIS TBIBUTION AND RADON FLUX FOR THE DETERMINATION OF OCEANIC MIXING A ND AIR ? SEA GAS EXCIdA NGE A Thesis by ROBERT LEWIS...

Brewer, Robert Lewis

2012-06-07T23:59:59.000Z

140

B Decay  

NLE Websites -- All DOE Office Websites (Extended Search)

Decay Decay B mesons are short-lived and decay inside the beam pipe, which is about 2.5 cm (1 inch) in diameter. Physicists project the tracks seen in the detector elements outside the beampipe back to where the particles must have traveled inside the beam pipe. We call a point where particles collide or decay a vertex. A way to identify a B meson is to look for two vertices with a gap between them. On the left is a standard event picture. On the right is a blowup of what happens close to the collision point inside the beam pipe. The vertex is where the B meson along with other particles was created and the secondary vertex is where it decayed. The solid green lines are the actual tracks of the decay particles outside the beam pipe. The dotted lines are the projection of the tracks into the beam pipe. Where they intersect are the vertices. The B travels between the first vertex and the secondary vertex along the black dotted line before it decays. Thus, the gap between the two vertices is a measure of the lifetime of the B meson. We will be looking for this decay length in our data. We will find a minimum or "threshold" value that will tell us to save events for further analysis.

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Radon release and dispersion from an open pit uranium mine  

SciTech Connect

Radon-222 flux from representative sections of the United Nuclear St. Anthony open-pit mine complex was measured. The collected radon was adsorbed on activated charcoal and the radon activity was measured by gamma spectroscopy. System design, calibration, and the procedure to determine radon flux density (pCi/m/sup 2/.s) are described. A continuous series of radon flux densities were measured over a 5-month period at a control point in the mine. The average flux density at the control point was 1.9 pCi/m/sup 2/.s. A close correlation between radon flux density variations and changes in barometric pressure was observed by a comparison of meteorological data and average daily radon flux density measured at the control point. The release rate from each section of the mine was calculated from the average radon flux density and the area of the section, as determined from enlarged aerial photographs. The average radon flux density for eight locations over the ore-bearing section was 7.3 pCi/m/sup 2/.s. The average flux density for four locations over undisturbed topsoil was 0.17 pCi/m/sup 2/.s. The average Ra-226 content of ten samples taken from the ore-bearing region was 102 pCi/g ore. The ratio of radon flux density to radium content (specific flux) was 0.072. The release rate from the entire St. Anthony open pit was determined to be 3.5 x 10/sup 5/ pCi/s. This rate is comparable to the natural release of radon from one square mile of undisturbed topsoil. 16 refs., 31 figs., 11 tabs.

Kisieleski, W.E.

1980-06-01T23:59:59.000Z

142

ENDF/B-VII.1 Nuclear Data for Science and Technology: Cross Sections, Covariances, Fission Product Yields and Decay Data  

E-Print Network (OSTI)

testing of the ENDF/B-VII.1 library is provided for a variety of quantities: For nuclear criticalityENDF/B-VII.1 Nuclear Data for Science and Technology: Cross Sections, Covariances, Fission Product Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia 11 Nuclear Research and Consultancy Group, P

Danon, Yaron

143

Extracellular Factor(s) following Exposure to ? Particles Can Cause Sister Chromatid Exchanges in Normal Human Cells  

Science Journals Connector (OSTI)

...Energy-funded projects entitled Latent...emitted from inhaled radon and radon progeny...inhaled radon and radon progeny cause lung...Energy-funded projects entitled oeLatentExpression...Nos. 1 "3,International Corn mission for...Nero (ed), Radon and Its Decay Products...

Bruce E. Lehnert and Edwin H. Goodwin

1997-06-01T23:59:59.000Z

144

Radon control systems in existing and new construction: a review  

Science Journals Connector (OSTI)

......home. In crawl spaces, the sheeting is...infiltration after construction. The results of...techniques in new construction are presented in...radon levels Crawl space Minimal Moderate...Modifications to heating, ventilation and...public and private sector radon mitigation......

Naureen Mahbub Rahman; Bliss L. Tracy

2009-08-01T23:59:59.000Z

145

Indoor radon problem in energy efficient multi-storey buildings  

Science Journals Connector (OSTI)

......Against Radon at Home and at Work Indoor radon problem in energy efficient multi-storey...amount of the total energy consumption in developed countries...approaches for designing energy-efficient buildings...registration of 1 h average value. Dwellers......

I. V. Yarmoshenko; A. V. Vasilyev; A. D. Onishchenko; S. M. Kiselev; M. V. Zhukovsky

2014-07-01T23:59:59.000Z

146

Radon control systems in existing and new construction: a review  

Science Journals Connector (OSTI)

......intervals after remediation, perhaps once...radon in the ground can penetrate...buildings from ground water and from building...holes around the water or electricity...Another option for remediation in existing homes...drawn from the ground by thermal convection...non-pressurised ground water solved the radon......

Naureen Mahbub Rahman; Bliss L. Tracy

2009-08-01T23:59:59.000Z

147

Indoor Dose Conversion Coefficients for Radon Progeny for Different  

E-Print Network (OSTI)

Indoor Dose Conversion Coefficients for Radon Progeny for Different Ambient Environments K . N . Y ambient environments on the indoor radon dose (in terms of the dose conversion coefficient or DCC of the human respiratory tract. Epidemiological studies of under- ground miners of uranium and other minerals

Yu, K.N.

148

Search for direct production of charginos and neutralinos decaying via the 125 GeV Higgs boson in $\\sqrt{s}$ = 8 TeV $pp$ collisions with the ATLAS detector  

E-Print Network (OSTI)

A search for the direct pair production of charginos and neutralinos $pp\\to\\tilde{\\chi}_1^\\pm\\tilde{\\chi}_2^0$ is presented, where the chargino decays via a $W$ boson $\\tilde{\\chi}_1^\\pm\\to \\tilde{\\chi}_1^0 (W^{\\pm}\\to\\ell^{\\pm}\

The ATLAS collaboration

2014-01-01T23:59:59.000Z

149

Search for direct pair production of a chargino and a neutralino decaying to the 125 GeV Higgs boson in $\\sqrt{s}$ = 8 TeV pp collisions with the ATLAS detector  

E-Print Network (OSTI)

A search is presented for the direct pair production of a chargino and a neutralino $pp\\to\\tilde{\\chi}^\\pm_1\\tilde{\\chi}^0_2$, where the chargino decays to the lightest neutralino and the $W$ boson, $\\tilde{\\chi}^\\pm_1 \\to \\tilde{\\chi}^0_1 (W^{\\pm}\\to\\ell^{\\pm}\

,; ATLAS Collaboration

2015-01-01T23:59:59.000Z

150

Determination of radon concentrations of the Dikili geothermal area in western turkey  

Science Journals Connector (OSTI)

......Figure 3 shows the average indoor radon concentrations...the Turkish Atomic Energy Commission for indoor...distribution of average indoor radon concentrations...Variation of the average indoor radon concentrations...and bottling, the consumption of interest in the...against radon-222 at home and at work, ICRP......

Y. Yarar; T. Günaydi; N. Çelebi

2006-04-01T23:59:59.000Z

151

The Austrian radon activities on the way to the national radon action plan  

Science Journals Connector (OSTI)

......radon concentration in water or air)-is listed...well as workplace on ground floor and basement level...building materials, water). A list of issues...type, measurement, remediation and prevention measures...situation (annual mean, ground floor, no basement......

V. Gruber; W. Ringer; G. Wurm; W. Haider

2014-07-01T23:59:59.000Z

152

The Austrian radon activities on the way to the national radon action plan  

Science Journals Connector (OSTI)

......AGES - Austrian Agency for Health and Food Safety, National...the OIB-3 guideline under dangerous immissions and refers to the...radon exposure and associated health risks(4), which is covered...within the Austrian Agency for Health and Food Safety (AGES......

V. Gruber; W. Ringer; G. Wurm; W. Haider

2014-07-01T23:59:59.000Z

153

Determination of Airborne Fission Product Radioactivity using Gamma-Ray Spectrometry  

Science Journals Connector (OSTI)

... portion thereof by means of an end-window Geiger-Miiller counter or other suitable detector. Radon and thoron along with their radioactive daughter products are universally present in surface air in ... determine airborne fission product radioactivity it is necessary to differentiate it from that arising from radon and thoron daughters. The concentration of ...

P. F. GUSTAFSON; S. S. BRAR; U. C. MISHRA

1962-08-11T23:59:59.000Z

154

Latest results of NEXT-DEMO, the prototype of the NEXT 100 double beta decay experiment  

E-Print Network (OSTI)

NEXT-DEMO is a 1:4.5 scale prototype of the NEXT100 detector, a high-pressure xenon gas TPC that will search for the neutrinoless double beta decay of $^{136}$Xe. X-ray energy depositions produced by the de-excitation of Xenon atoms after the interaction of gamma rays from radioactive sources have been used to characterize the response of the detector obtaining the spatial calibration needed for close-to-optimal energy resolution. Our result, 5.5% FWHM at 30 keV, extrapolates to 0.6% FWHM at the Q value of $^{136}$Xe. Additionally, alpha decays from radon have been used to measure several detection properties and parameters of xenon gas such as electron-ion recombination, electron drift velocity, diffusion and primary scintillation light yield. Alpha spectroscopy is also used to quantify the activity of radon inside the detector, a potential source of background for most double beta decay experiments.

Serra, L; Martin-Albo, J; Sorel, M; Gomez-Cadenas, J J

2014-01-01T23:59:59.000Z

155

National radon database documentation. Volume 5. The EPA/state residential radon surveys: Years 5 and 6. Final report 1986-1992  

SciTech Connect

The National Radon Database has been developed by the U.S. Environmental Protection Agency (EPA) to distribute information collected in two recently completed radon surveys: the EPA/State Residential Radon Surveys, Years 1 to 6; and The National Residential Radon Survey. The goals of the state radon surveys were twofold. Some measure of the distribution of radon levels among residences was desired for major geographic areas within each state and for each state as a whole. In addition, it was desired that each state survey would be able to identify areas of potentially high residential radon concentrations (hot spots) in the state, enabling the state to focus its attention on areas where indoor radon concentrations might pose a greater health threat. The document discusses year 5, 1990-91. The areas surveyed are: Arkansas; Illinois; Maryland; Eastern Cherokee Nation; Mississippi; Texas; and Washington.

Not Available

1993-01-01T23:59:59.000Z

156

Search for the production of ZW and ZZ boson pairs decaying into charged leptons and jets in proton-antiproton collisions at sqrt[s]=1.96 TeV  

SciTech Connect

We present a measurement of the production cross section for ZW and ZZ boson pairs in final states with a pair of charged leptons, from the decay of a Z boson, and at least two jets, from the decay of a W or Z boson, using the full sample of proton-antiproton collisions recorded with the CDF II detector at the Tevatron, corresponding to 8.9 fb^(-1) of integrated luminosity. We increase the sensitivity to vector boson decays into pairs of quarks using a neural network discriminant that exploits the differences between the spatial spread of energy depositions and charged-particle momenta contained within the jet of particles originating from quarks and gluons. Additionally, we employ new jet energy corrections to Monte Carlo simulations that account for differences in the observed energy scales for quark and gluon jets. The number of signal events is extracted through a simultaneous fit to the dijet mass spectrum in three classes of events: events likely to contain jets with a heavy-quark decay, events likely to contain jets originating from light quarks, and events that fail these identification criteria. We determine the production cross section to be 2.5 +2.0 -1.0 pb (< 6.1 pb at the 95% confidence level), consistent with the standard model prediction of 5.1 pb.

Aaltonen, Timo Antero; et al,

2013-11-13T23:59:59.000Z

157

Energy deposition and radiation quality of radon and radon daughters. Final report  

SciTech Connect

This program was aimed at creating a quantitative physical description, at the micrometer and nanometer levels, of the physical interactions of the alpha particles from radon and its daughters with cells at risk in the bronchial epithelium. The authors calculated alpha-particle energy spectra incident upon the cells and also energy deposition spectra in micrometer- and nanometer-sized sites as a function of cell depth, site size, airway diameter, activities of {sup 218}Po and {sup 214}Po, and other parameters. These data are now being applied, using biophysical models of radiation effects, to predict cell killing, mutations, and cell transformation. The model predictions are then compared to experimental biophysical, biochemical, and biological information. These studies contribute to a detailed understanding of the mechanisms of the biological effectiveness of the radiations emitted by radon and its progeny.

Karam, L.R.; Caswell, R.S.

1996-09-09T23:59:59.000Z

158

Radiative Decay of the Muon  

Science Journals Connector (OSTI)

The radiative decay of the muon, ?+?e++?+?e+?¯?, has been measured using muons from the Columbia University Nevis synchrocyclotron. The decay products e+ and ? were observed at relative angles near 180°, using scintillation counters and two 9-in.×10-in. NaI crystals, which enabled simultaneous measurement of the positron and ? energies. The pulses from the crystals were displayed on oscilloscopes and photographed, and the measured amplitudes of these pulses were calibrated using the positron spectrum of the nonradiative decay. The two-dimensional energy spectrum for positrons and ?'s was obtained for about 900 events, after subtraction of background. This spectrum and the measured rate, obtained by normalizing to the nonradiative decay, were compared with theoretical predictions for the radiative decay. The results were in good agreement with the theory, within statistics, for the case of pure V-A coupling.

E. Bogart; E. DiCapua; P. Némethy; A. Strelzoff

1967-04-25T23:59:59.000Z

159

Observables in the decays of B to two vector mesons  

Science Journals Connector (OSTI)

In general there are nine observables in the decay of a B meson to two vector mesons defined in terms of polarization correlations of these mesons. Only six of these can be detected via the subsequent decay angular distributions because of parity conservation in those decays. The remaining three require the measurement of the spin polarization of one of the decay products.

Cheng-Wei Chiang and Lincoln Wolfenstein

2000-03-10T23:59:59.000Z

160

Exposure to radon in dwellings in the Sharri community, Kosovo  

Science Journals Connector (OSTI)

......major cause of lung cancer, second only to cigarette...course of prospecting for uranium between 1983 and 1989...because they were hit by depleted uranium projectiles during the...although no impact of depleted uranium on radon levels was......

M. Bahtijari; J. Vaupotic; A. Gregoric; P. Stegnar; I. Kobal

2008-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

History of the measurement of radon in central Bohemia  

Science Journals Connector (OSTI)

......is radium needles in depleted uranium shielding. The chamber's...Jerabek J. Lung cancer risk in relation to long-term...radiation exposure in uranium mines. Trnovec T...Holecek J. Study of lung cancer and residential radon......

Ivo Burian; Petr Otahal

2008-06-01T23:59:59.000Z

162

Measurement of indoor radon concentration in kindergartens in Sofia, Bulgaria  

Science Journals Connector (OSTI)

......significance of the overall factors for indoor radon concentration was tested by analysis of variance (ANOVA) and Kruskal-Wallis non-parametric test at a significance level of 95 %. Number of measurements, minimum, median, maximum, GM......

Kremena Ivanova; Zdenka Stojanovska; Martina Tsenova; Viktor Badulin; Bistra Kunovska

2014-11-01T23:59:59.000Z

163

Radon in context of natural radiation exposure: the Czech experience  

Science Journals Connector (OSTI)

......doses from ingestion of water are reasonably avertable...and intervention (remediation of existing exposure...effective dose caused by water containing 1000 Bq l1...radon concentrations in ground water vary from some Becquerel......

J. Hulka

2008-06-01T23:59:59.000Z

164

Some aspects of the radon problem in Kazakhstan  

Science Journals Connector (OSTI)

Publisher Summary Preliminary analysis shows that the population of Kazakhstan lives primarily in potentially dangerous areas from the radioactivity exposure point of view. According to selected studies, radon isotope PAEC values in premises where people stay for long times may exceed allowable levels by several times. At the same time, on account of insufficient organization of work on a national scale, lack of funds, standard methods and metrology equipment, no radon studies are actually performed even in those regions where geological rock structure and availability of tectonic faults suggest that an excess radon concentration in residential and public buildings may be anticipated. Preliminary recorded data from independent studies show that increased radon concentrations in living premises are typical of the Republic. The survey of population exposure from natural sources of ionizing radiation in Akchatau village in Zhezkazgan oblast and the survey done in Almaty are insufficient to understand and solve the problem in Kazakhstan in general.

V.N. Sevostyanov

2005-01-01T23:59:59.000Z

165

Effect of Irradiating the Tubercle Bacillus with Radon  

Science Journals Connector (OSTI)

... tubercle bacillus (1 mgm./c.c.) using the whole of the radiation of radon dissolved in the culture. The teclinique we have elaborated enables us to obtain reproducible ... -radiations aro negligible.) The following results are observed.

P. BONET-MAURY; H. R. OLIVIER

1939-11-11T23:59:59.000Z

166

Analysis of Gamma Radiation from a Radon Source: Indications of a Solar Influence  

E-Print Network (OSTI)

This article presents an analysis of about 29,000 measurements of gamma radiation associated with the decay of radon in a sealed container at the Geological Survey of Israel (GSI) Laboratory in Jerusalem between 28 January 2007 and 10 May 2010. These measurements exhibit strong variations in time of year and time of day, which may be due in part to environmental influences. However, time-series analysis reveals a number of periodicities, including two at approximately 11.2 year$^{-1}$ and 12.5 year$^{-1}$. We have previously found these oscillations in nuclear-decay data acquired at the Brookhaven National Laboratory (BNL) and at the Physikalisch-Technische Bundesanstalt (PTB), and we have suggested that these oscillations are attributable to some form of solar radiation that has its origin in the deep solar interior. A curious property of the GSI data is that the annual oscillation is much stronger in daytime data than in nighttime data, but the opposite is true for all other oscillations. This may be a systematic effect but, if it is not, this property should help narrow the theoretical options for the mechanism responsible for decay-rate variability.

Peter A. Sturrock; Gideon Steinitz; Ephraim Fischbach; Daniel Javorsek, II; Jere H. Jenkins

2012-05-01T23:59:59.000Z

167

Radon attenuation handbook for uranium mill tailings cover design  

SciTech Connect

This handbook has been prepared to facilitate the design of earthen covers to control radon emission from uranium mill tailings. Radon emissions from bare and covered uranium mill tailings can be estimated from equations based on diffusion theory. Basic equations are presented for calculating surface radon fluxes from covered tailings, or alternately, the cover thicknesses required to satisfy a given radon flux criterion. Also described is a computer code, RAECOM, for calculating cover thicknesses and surface fluxes. Methods are also described for measuring diffusion coefficients for radon, or for estimating them from empirical correlations. Since long-term soil moisture content is a critical parameter in determining the value of the diffusion coefficient, methods are given for estimating the long-term moisture contents of soils. The effects of cover defects or advection are also discussed and guidelines are given for determining if they are significant. For most practical cases, advection and cover defect effects on radon flux can be neglected. Several examples are given to demonstrate cover design calculations, and an extensive list of references is included. 63 references, 18 figures, 6 tables.

Rogers, V.C.; Nielson, K.K.; Kalkwarf, D.R.

1984-04-01T23:59:59.000Z

168

Indoor and soil gas radon simultaneous measurements for the purpose of detail analysis of radon entry pathways into houses  

Science Journals Connector (OSTI)

......on the modification of the standard BD method described in detail...concentration is variable during the standard indoor measurement campaign...symmetric against each other and standard indoor radon measurement...householder activities, including HVAC (heating, ventilation and......

A. Fronka

2011-05-01T23:59:59.000Z

169

Incidence characteristics of alpha particles on detectors irradiated in a radon progeny atmosphere  

E-Print Network (OSTI)

regarding short-lived radon prog- eny has attracted much attention in the field of radon dosimetry. Nuclear state nuclear track detectors (SSNTDs). Here, we should mention the double detector method, in which one

Yu, K.N.

170

Protection from radon exposure at home and at work in the directive 2013/59/Euratom  

Science Journals Connector (OSTI)

......RL for (annual average) radon concentration...as an annual average) exceeding the...as programmes on energy saving and indoor...due to tobacco consumption, energy saving and other...et al. Radon in homes and lung cancer......

F. Bochicchio

2014-07-01T23:59:59.000Z

171

Indoor radon in rural dwellings of the South-Pannonian region  

Science Journals Connector (OSTI)

......are possibly due to the uranium content of deep underground...Lj. Simple method for depleted uranium determination. Jpn J...underestimate the radon-related health risk. The elevated radon...explained by elevated uranium levels of surface soil......

S. Forkapic; I. Bikit; J. Slivka; Lj. Conkic; M. Veskovic; N. Todorovic; E. Varga; D. Mrda; E. Hulber

2007-02-01T23:59:59.000Z

172

The Particle Adventure | Particle decays and annihiliations | Confusion  

NLE Websites -- All DOE Office Websites (Extended Search)

Confusion about Confusion about decays Confusion about decays Many heavy elements decay into simpler things. But a close observation of these decays reveals several confusing problems. Consider uranium-238 decay. A lump of uranium-238 will decay at a constant rate such that in 4,460,000,000 years -- give or take a few days -- half the uranium will be gone. But there is no way to tell when a specific uranium atom will decay; it could decay five minutes from now, or in ten billion years. Why will an atom decay only according to some probability? Uranium-238 has a mass of 238.0508 atomic mass units (u). It can decay into thorium (234.0436 u) and an alpha particle (4.0026 u). But uranium's mass minus the mass of its decay products is 0.0046 u. Why is there missing mass?

173

Alpha decay of Fr215  

Science Journals Connector (OSTI)

The ?-decay property of Fr215 has been studied by the pulsed-beam method, in which Fr215 was produced in the Bi209(C12,?2n) reaction and its ? decay was measured between natural beam bursts of the cyclotron. The ground state of Fr215 was found to decay with E?=9.355±0.010 MeV and t12=0.12±0.02 ?sec. The reduced ? width of Fr215 is shown to fit the systematical trend of N=128 isotones very well and to agree with the simple shell-model calculation. Distributions of recoil angles for reaction products in the (C12,?xn) reaction were found to be quite different from those for (C12,xn) products, giving a convenient method of distinguishing these reaction products.[NUCLEAR REACTIONS Bi209(C12,xn), Bi209(C12,?xn), E=73-80 MeV; measured ? decay and W(?) of reaction products, E?, t12; deduced ?-decay width of Fr215.

T. Nomura; K. Hiruta; M. Yoshie; O. Hashimoto

1974-03-01T23:59:59.000Z

174

THE EFFECT OF RADON TRANSPORT IN GROUNDWATER UPON GAMMA-RAY BOREHOLE LOGS  

E-Print Network (OSTI)

Estimation of the Lung Tissue Dose from Inhalation of Radon and Daughters," Health Physics 10, 1137 Federal Radiation

Nelson, P.H.

2010-01-01T23:59:59.000Z

175

Rectangular discrete radon transform for buildings extraction from high resolution satellite images  

Science Journals Connector (OSTI)

This paper presents a new approach titled Rectangular Discrete Radon Transform (RDRT) which is based on the generalization of the classical Radon transform to project the images with rectangular objects instead of straight lines. The RDRT was conceived ... Keywords: high resolution satellite image, rectangular buildings, rectangular discrete radon transform

Elouedi Ines; Hamouda Atef; Rojbani Hmida

2012-06-01T23:59:59.000Z

176

1) Title of the paper: Lossless Compression Based on a Discrete and Exact Radon Transform: A  

E-Print Network (OSTI)

the difference between several sim- ilar finite Radon projections. Two differential encoding tech- niques are needed to efficiently encode the Radon trans- formed data. An intra-projection encoding technique in such projections. The second step consists in encoding the similarities between Radon projections

Autrusseau, Florent

177

DTW for Matching Radon Features: A Pattern Recognition and Retrieval Method  

E-Print Network (OSTI)

. This allows to exploit the Radon property to include both boundary as internal structure of shapes, whileDTW for Matching Radon Features: A Pattern Recognition and Retrieval Method Santosh K.C.1 , Bart. It is basically based on dynamic programming for matching the Radon features. The key char- acteristic

Boyer, Edmond

178

Seasonal variation of radon concentrations in UK homes  

Science Journals Connector (OSTI)

The patterns of seasonal variation of radon concentrations were measured in 91 homes in five regions of the UK over a period of two years. The results showed that there was no significant difference between the regions in the pattern or magnitude of seasonal variation in radon concentrations. The arithmetic mean variation was found to be close to that found previously in the UK national survey. Differences in the pattern between the two years of the study were not significant. Two-thirds of homes in the study followed the expected pattern of high radon in the winter and low radon in the summer. Most of the rest showed little seasonal variation, and a few showed a reversed seasonal pattern. The study does not provide any clear evidence for the recorded house characteristics having an effect on the seasonal variation in radon concentrations in UK homes, though the statistical power for determining such effects is limited in this study. The magnitude of the seasonal variation varied widely between homes. Analysis of the individual results from the homes showed that because of the wide variation in the amount of seasonal variation, applying seasonal correction factors to the results of three-month measurements can yield only relatively small improvements in the accuracy of estimates of annual mean concentrations.

J C H Miles; C B Howarth; N Hunter

2012-01-01T23:59:59.000Z

179

Semileptonic Decays  

SciTech Connect

The following is an overview of the measurements of the CKM matrix elements |V{sub cb}| and |V{sub ub}| that are based on detailed studies of semileptonic B decays by the BABAR and Belle Collaborations and major advances in QCD calculations. In addition, a new and improved measurement of the ratios R(D{sup (*)}) = {Beta}({bar B} {yields} D{sup (*)}{tau}{sup -}{bar {nu}}{sub {tau}})/{Beta}({bar B} {yields} D{sup (*)}{ell}{sup -}{bar {nu}}{sub {ell}}) is presented. Here D{sup (*)} refers to a D or a D* meson and {ell} is either e or {mu}. The results, R(D) = 0.440 {+-} 0.058 {+-} 0.042 and R(D*) = 0.332 {+-} 0.024 {+-} 0.018, exceed the Standard Model expectations by 2.0{sigma} and 2.7{sigma}, respectively. Taken together, they disagree with these expectations at the 3.4{sigma} level. The excess of events cannot be explained by a charged Higgs boson in the type II two-Higgs-doublet model.

Luth, Vera G.; /SLAC

2012-10-02T23:59:59.000Z

180

Indoor radon concentrations in the town of Niksic, Montenegro  

Science Journals Connector (OSTI)

......ac.yu 1 Faculty of Natural Sciences and Mathematics...filter, which allows radon gas to enter the chamber volume...ranges from 7 Bq m3 (Cyprus) to 120 Bq m3 (Albania...283-291. Monograph Rare Gas Geochemistry - Applications...Montenegro. | Faculty of Natural Sciences and Mathematics......

N. Antovic; P. Vukotic; R. Zekic; R. Ilic

2007-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Achievements and current activities of the Canadian radon program  

Science Journals Connector (OSTI)

......territorial governments to review the Canadian radon...of practices and standards for radiation protection...Quality assurance plans have been established...the USA and the Standards Council of Canada...2008 to develop a standard protocol for mapping...such as ground uranium concentration from......

Jing Chen; Ken Ford; Jeff Whyte; Kelley Bush; Deborah Moir; Jack Cornett

2011-07-01T23:59:59.000Z

182

Dennis, Eberhart, Dulikravich & Radons FINITE ELEMENT SIMULATION OF COOLING  

E-Print Network (OSTI)

). The simulations performed in this study consider ice packs applied to head and neck as well as using a head-cooling1 Dennis, Eberhart, Dulikravich & Radons FINITE ELEMENT SIMULATION OF COOLING OF REALISTIC 3-D Rapid cooling of the brain in the first minutes following the onset of cerebral ischemia

Dennis, Brian

183

Indoor radon problem in energy efficient multi-storey buildings  

Science Journals Connector (OSTI)

......estimated. INTRODUCTION The problems of energy saving and energy efficiency are in the spotlight of society. Buildings account for a...percentile exceeds 10 and only in one room it is 4. In each house, the minimal registered radon concentration drops below......

I. V. Yarmoshenko; A. V. Vasilyev; A. D. Onishchenko; S. M. Kiselev; M. V. Zhukovsky

2014-07-01T23:59:59.000Z

184

Radon control systems in existing and new construction: a review  

Science Journals Connector (OSTI)

......maintenance. In the active/passive house ventilation system, natural...unique characteristics of each house, the level of radon, the...soil gases as well, increases energy efficiency, uses a passive system that...walls before it can enter the house (wall suction) or blows air......

Naureen Mahbub Rahman; Bliss L. Tracy

2009-08-01T23:59:59.000Z

185

Distillation purification and radon assay of liquid xenon  

SciTech Connect

We succeeded to reduce the Kr contamination in liquid xenon by a factor of 1/1000 with a distillation system in Kamioka mine. Then, the remaining radioactivities (Radon and Kr) in purified liquid xenon were measured with the XMASS prototype detector. In this talk, the distillation system and the remaining internal radioactivity levels are reported.

Takeuchi, Yasuo [Kamioka Observatory, ICRR, Univ. of Tokyo, Kamioka-cho, Hida-shi, Gifu 506-1205 (Japan)

2005-09-08T23:59:59.000Z

186

Long-Term Observations of Indoor and Outdoor Radon Concentrations  

Science Journals Connector (OSTI)

......Radiation Protection Dosimetry Article Long-Term Observations of Indoor and Outdoor...Lapere Two sets of data obtained by long-term observations of radon concentration...phosphogypsum was used. Around a nuclear waste storage place containing radium, 22 dosemeters......

J. Uyttenhove; R. Lapere

1988-08-01T23:59:59.000Z

187

Radon control systems in existing and new construction: a review  

Science Journals Connector (OSTI)

......air-tightness of a home. The quantities...estimates of the total average radon entry rate...buildings due to energy saving measures or...measures are costs, energy consumption, incomplete diagnostic...process. Surveys among home-owners could provide......

Naureen Mahbub Rahman; Bliss L. Tracy

2009-08-01T23:59:59.000Z

188

The history of radon from a Swedish perspective  

Science Journals Connector (OSTI)

......increase when saving energy by decreasing...rate during the energy crisis in 1974...The country-averages of the indoor...representative sampling of consumption water in Sweden...recommendations of 1993 for homes and workplaces...regarding the averages, with radon...is unfit for consumption. More than 100......

Gun Astri Swedjemark

2004-07-01T23:59:59.000Z

189

The newest international trend about regulation of indoor radon  

Science Journals Connector (OSTI)

......AL of 400 Bq m3 for above-ground workplaces and an AL in the...soil, building materials or water. A list of elements to be...100-200(18) aAbove-ground workplaces. bUnderground workplaces...RADPAR-Radon Prevention and Remediation, grant agreement No. 20081217......

Francesco Bochicchio

2011-07-01T23:59:59.000Z

190

Content based image hashing via wavelet and radon transform  

Science Journals Connector (OSTI)

Image hash function based on the image content has applications in watermarking, authentication and image retrieval. This paper presents an algorithm for generating an image hash that is robust against content-preserving modifications and at the same ... Keywords: image hashing, radon transform, wavelet transform

Xin C. Guo; Dimitrios Hatzinakos

2007-12-01T23:59:59.000Z

191

Spherical radon transforms and mathematical problems of thermoacoustic tomography  

E-Print Network (OSTI)

The spherical Radon transform (SRT) integrates a function over the set of all spheres with a given set of centers. Such transforms play an important role in some newly developing types of tomography as well as in several areas of mathematics...

Ambartsoumian, Gaik

2009-06-02T23:59:59.000Z

192

Measurement of CP Violation in B[0 over s] ? ?? decays  

E-Print Network (OSTI)

A measurement of the decay time-dependent CP-violating asymmetry in B[0 over s] ? ?? decays is presented, along with measurements of the T-odd triple-product asymmetries. In this decay channel, the CP-violating weak phase ...

Counts, Ian Thomas Hunt

193

Radon releases from Australian uranium mining and milling projects: assessing the UNSCEAR approach  

Science Journals Connector (OSTI)

The release of radon gas and progeny from the mining and milling of uranium-bearing ores has long been recognised as a potential radiological health hazard. The standards for exposure to radon and progeny have decreased over time as the understanding of their health risk has improved. In recent years there has been debate on the long-term releases (10,000 years) of radon from uranium mining and milling sites, focusing on abandoned, operational and rehabilitated sites. The primary purpose has been estimates of the radiation exposure of both local and global populations. Although there has been an increasing number of radon release studies over recent years in the USA, Australia, Canada and elsewhere, a systematic evaluation of this work has yet to be published in the international literature. This paper presents a detailed compilation and analysis of Australian studies. In order to quantify radon sources, a review of data on uranium mining and milling wastes in Australia, as they influence radon releases, is presented. An extensive compilation of the available radon release data is then assembled for the various projects, including a comparison to predictions of radon behaviour where available. An analysis of cumulative radon releases is then developed and compared to the UNSCEAR approach. The implications for the various assessments of long-term releases of radon are discussed, including aspects such as the need for ongoing monitoring of rehabilitation at uranium mining and milling sites and life-cycle accounting.

Gavin M. Mudd

2008-01-01T23:59:59.000Z

194

Production  

Science Journals Connector (OSTI)

Production is obtained from proved reserves but the determinants of the scale of production in the industry and country components of the world total are many and complex with some unique to the individual com...

D. C. Ion

1980-01-01T23:59:59.000Z

195

Radon flux measurements on Gardinier and Royster phosphogypsum piles near Tampa and Mulberry, Florida  

SciTech Connect

As part of the planned Environmental Protection Agency (EPA) radon flux monitoring program for the Florida phosphogypsum piles, Pacific Northwest Laboratory (PNL), under contract to the EPA, constructed 50 large-area passive radon collection devices and demonstrated their use at two phosphogypsum piles near Tampa and Mulberry, Florida. The passive devices were also compared to the PNL large-area flow-through system. The main objectives of the field tests were to demonstrate the use of the large-area passive radon collection devices to EPA and PEI personnel and to determine the number of radon flux measurement locations needed to estimate the average radon flux from a phosphogypsum pile. This report presents the results of the field test, provides recommendations for long-term monitoring, and includes a procedure for making the radon flux measurements.

Hartley, J.N.; Freeman, H.D.

1986-01-01T23:59:59.000Z

196

The effectiveness of radon preventive and remedial measures in Irish homes  

Science Journals Connector (OSTI)

It is estimated that approximately 100?000 Irish homes have radon concentrations above the reference level of 200 Bq m?3. To minimise the number of new homes with this problem, building regulations require that all new homes built since July 1998 in high radon areas are installed with radon barriers during construction. Measurements on local authority homes in a number of high radon areas have allowed the impact of these new regulations to be assessed. In County Cork a reduction of up to 70% in the mean radon concentration was observed in homes built since 1998 relative to those built before this date. A reduction in both the number of homes exceeding the reference level and the maximum concentration measured in homes was also measured. Homes exceeding the reference level were remediated with the use of an active sump. The results of this remedial work are also presented and show that the mean reduction in radon concentration achieved was 92%.

S Long; D Fenton; M Cremin; A Morgan

2013-01-01T23:59:59.000Z

197

HIGH TEMPERATURE TREATMENT OF INTERMEDIATE-LEVEL RADIOACTIVE WASTES - SIA RADON EXPERIENCE  

SciTech Connect

This review describes high temperature methods of low- and intermediate-level radioactive waste (LILW) treatment currently used at SIA Radon. Solid and liquid organic and mixed organic and inorganic wastes are subjected to plasma heating in a shaft furnace with formation of stable leach resistant slag suitable for disposal in near-surface repositories. Liquid inorganic radioactive waste is vitrified in a cold crucible based plant with borosilicate glass productivity up to 75 kg/h. Radioactive silts from settlers are heat-treated at 500-700 0C in electric furnace forming cake following by cake crushing, charging into 200 L barrels and soaking with cement grout. Various thermochemical technologies for decontamination of metallic, asphalt, and concrete surfaces, treatment of organic wastes (spent ion-exchange resins, polymers, medical and biological wastes), batch vitrification of incinerator ashes, calcines, spent inorganic sorbents, contaminated soil, treatment of carbon containing 14C nuclide, reactor graphite, lubricants have been developed and implemented.

Sobolev, I.A.; Dmitriev, S.A.; Lifanov, F.A.; Kobelev, A.P.; Popkov, V.N.; Polkanov, M.A.; Savkin, A.E.; Varlakov, A.P.; Karlin, S.V.; Stefanovsky, S.V.; Karlina, O.K.; Semenov, K.N.

2003-02-27T23:59:59.000Z

198

Measurement of the production and muonic decay rate of W and Z bosons in pp¯ collisions at ?s =1.8 TeV  

Science Journals Connector (OSTI)

An analysis of proton-antiproton collisions at ?s =1.8 TeV recorded with the Collider Detector at Fermilab (CDF) yields ?(pp¯?WX)B(W???)=2.21±0.22 nb and ?(pp¯?ZX)B(Z ??+?-)=0.226±0.032 nb. The ratio is R?=?WB(W???)/?ZB(Z??+?-)=9.8±1.2. Combining with previous CDF electron results gives ?WB(W?l?)=2.20±0.20 nb, ?ZB(Z?l+l-)=0.214±0.023 nb, and Rl=10.0±0.8. We extract the ratios of the coupling constants g?/ge and g?/g?. Using standard model assumptions we deduce the inverse branching ratio B-1(W?l?), the width ?(W), and a decay-mode-independent lower bound on the top quark mass of 45 GeV/c2 (95% C.L.).

F. Abe et al.

1992-07-06T23:59:59.000Z

199

Production  

Energy.gov (U.S. Department of Energy (DOE))

Algae production R&D focuses on exploring resource use and availability, algal biomass development and improvements, characterizing algal biomass components, and the ecology and engineering of...

200

E-Print Network 3.0 - au radon gaz Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

est gal au rapport des intensits du tube de radon... place au milieu d'un tube Fis. 2. Une enveloppe ... Source: Ecole Polytechnique, Centre de mathmatiques Collection:...

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

E-Print Network 3.0 - atmospheric radon-222 concentration Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

1. Radon-222... concentrations in air include ... Source: Baskaran, Mark - Department of Geology, Wayne State University Collection: Geosciences ; Chemistry 30 1.0 MAJOR STUDIES...

202

National Radon Database. Volume 5. The EPA/state residential radon surveys: AR, IL, MD, MT, MS, TX, VA, WA and the Eastern Cherokee Nation, 1990-1992 (5 1/4 inch 1. 2mb) (for microcomputers). Data file  

SciTech Connect

The National Radon Database (NRDB) was developed by the United States Environmental Protection Agency (USEPA) to distribute information in two recent radon surveys: the EPA/State Residential Radon Surveys and the National Residential Radon Survey. The National Residential Radon Surveys collected annual average radon measurements on all levels of approximately 5,700 homes nationwide. Information collected during survey includes a detailed questionnaire on house characteristics, as well as radon measurements. The radon survey data for Volume 6 is contained on two diskettes. The data diskettes are accompanied by comprehensive documentation on the design and implementation of the survey, the development and use of sampling weights, a summary of survey results, and information concerning the household questionnaire.

Not Available

1992-01-01T23:59:59.000Z

203

National Radon Database. Volume 5. The EPA/state residential radon surveys: AR, IL, MD, MT, MS, TX, VA, WA, and the Eastern Cherokee Nation, 1990-1992 (3 1/2 inch, 1. 44mb) (for microcomputers). Data file  

SciTech Connect

The National Radon Database (NRDB) was developed by the United States Environmental Protection Agency (USEPA) to distribute information in two recent radon surveys: the EPA/State Residential Radon Surveys and the National Residential Radon Survey. The National Residential Radon Surveys collected annual average radon measurements on all levels of approximately 5,700 homes nationwide. Information collected during survey includes a detailed questionnaire on house characteristics, as well as radon measurements. The radon survey data for Volume 6 is contained on two diskettes. The data diskettes are accompanied by comprehensive documentation on the design and implementation of the survey, the development and use of sampling weights, a summary of survey results, and information concerning the household questionnaire.

Not Available

1992-01-01T23:59:59.000Z

204

A Prototype Radon Filter for Air A typical, recurring problem in low-background physics is the contamination of sensitive  

E-Print Network (OSTI)

is the contamination of sensitive surfaces of experimental apparata with the radioactive decay products of 222Rn . What since all its daughters are short-lived and decay away in a few days (see the 232Th radioactive chain.1: The 232Th natural radioactive chain. Diffusion of thoron (220Rn) and plate out of its daughters doesn

205

Exotic decay model and alpha decay studies  

SciTech Connect

In exotic decay studies, the lifetime of alpha emission occurs crucially in the branching ratio calculation. In this work, we extend our previous exotic decay model to calculate the same. But, in this case unlike in the exotic decay, the redistribution of charge for given masses of the fragments has to be taken into account since the charge-to-mass ratio of the alpha fragment differs from that of the parent nucleus. We have therefore modified the Yukawa-plus-exponential potential in the post-scission region in our model suitably so as to allow the required charge redistribution among the fragments in the region between sharp contact and the point up to which the finite-range effects persist. The success of this model for alpha decay is as good as for the exotic decay studies.

Shanmugam, G.; Kamalaharan, B. (Department of Physics, Presidency College, Madras 600005, India (IN))

1990-04-01T23:59:59.000Z

206

Technical Report No.7, Investigation of radon and helium as possible fluid-phase precursors to earthquakes. Technical Report No. 2, Additional task: Radon, helium and geochemical monitoring on the Palmdale uplift.  

E-Print Network (OSTI)

Imperial Valley) HELIUM AND All with RADON IN WELL SAMPLES of the wells in the Southern Network are geothermal

Craig, H; Lupton, J E; Chung, Y; Horowitz, R M

1977-01-01T23:59:59.000Z

207

Influence of energy-saving measures on the radon concentration in some kindergartens in the Czech Republic  

Science Journals Connector (OSTI)

......Radon at Home and at Work Influence of energy-saving...obtain the average activity...current energy consumption standards...that recent energy-saving...long-term average indoor radon...et al. Home energy efficiency......

I. Fojtikova; K. Navratilova Rovenska

2014-07-01T23:59:59.000Z

208

Moduli Decays and Gravitinos  

SciTech Connect

One proposed solution of the moduli problem of string cosmology requires that the moduli are quite heavy, their decays reheating the universe to temperatures above the scale of nucleosynthesis. In many of these scenarios, the moduli are approximately supersymmetric; it is then crucial that the decays to gravitinos are helicity suppressed. In this paper, we discuss situations where these decays are, and are not, suppressed. We also comment on a possible gravitino problem from inaton decay.

Dine, Michael; Kitano, Ryuichiro; Morisse, Alexander; Shirman, Yuri

2006-04-21T23:59:59.000Z

209

Calculated secondary yields for proton broadband using DECAY TURTLE  

SciTech Connect

The calculations for the yields were done by Al Sondgeroth and Anthony Malensek. The authors used the DECAY deck called PBSEC{_}E.DAT from the CMS DECKS library. After obtaining the run modes and calibration modes from the liaison physicist, they made individual decay runs, using DECAY TURTLE from the CMS libraries and a production spectrum subroutine which was modified by Anthony, for each particle and decay mode for all particle types coming out of the target box. Results were weighted according to branching ratios for particles with more than one decay mode. The production spectra were produced assuming beryllium as the target. The optional deuterium target available to broadband will produce slightly higher yields. It should be noted that they did not include pion yields from klong decays because they could not simulate three body decays. Pions from klongs would add a very small fraction to the total yield.

Sondgeroth, A.

1995-02-01T23:59:59.000Z

210

A study of radon-222 concentrations in North Carolina groundwater  

SciTech Connect

The groundwater of 400 North Carolina homes was sampled to ascertain the distribution and extent of {sup 222}Rn in North Carolina groundwater. Arithmetic mean (AM) and geometric mean (GM) concentrations of 1,816 pCi L{sup {minus}1} and 656 pCi L{sup {minus}1} were found for the state. These results indicate that two-thirds of 114{degree}C. homes served by groundwater exceed the EPA proposed 300 pCi L{sup {minus}1} maximum contaminant level (MCL). Only 2% of NC homes exceeded 10,000 pCi L-1. The Eastern region had the lowest radon concentrations by far, with a GM of 2-)0 pCi L{sup {minus}1}. The Central region and Western region had GM`s of 794 pCi L{sup {minus}1} and 1,032 pCi L{sup {minus}1} respectively. The groundwater data approached a log normal distribution. No consistent trends were noted in the relationship between indoor radon concentrations and groundwater radon concentrations. A correlation coefficient of 0.00921 revealed a very weak linear relationship.

Evans, J.P.

1992-12-31T23:59:59.000Z

211

Radon emanation measurement using French and Russian track detectors  

Science Journals Connector (OSTI)

This paper presents the first results of a new Franco-Russian project: the International Centre for Radon Expertise (I.C.R.E.). The objectives of this center include determining the sources and contents of natural radioactive gases and their radioactive daughters in order to provide protection against radiation for the population and the environment, and trace the migration of radioactive elements in the soil and plants. Passive radon measurement techniques developed in France and in Russia have been used together to conduct preliminary studies. The results of a comparison of the two techniques, applied both in laboratory and outdoors, are also presented. In order to develop the one passive technique that will be used in future studies, the possibility of optimization using various French and Russian detectors has been investigated. Attempts have been made to compare the response of original measurement cells with nuclear track detectors. Comparisons of such track detector responses have been performed at the university of Franche-Comte in France using various radon environmental conditions (atmospheric gas, soil gas and in water).

D Klein; V Pautov; A Chambaudet; G Barenboim

1995-01-01T23:59:59.000Z

212

Decay of Np241  

Science Journals Connector (OSTI)

The decay of a 16-minute neptunium activity attributed to Np241 has been studied with anthracene and sodium iodide scintillation counters. The principal mode of decay appears to be a beta group decaying to the ground state of Pu241 with a beta end-point energy of 1.36±0.10 Mev.

R. Vandenbosch

1959-01-01T23:59:59.000Z

213

Production  

Energy.gov (U.S. Department of Energy (DOE))

Algae production R&D focuses on exploring resource use and availability, algal biomass development and improvements, characterizing algal biomass components, and the ecology and engineering of cultivation systems.

214

Lead-210 and Polonium-210 in Grass  

Science Journals Connector (OSTI)

... that a large part of such activity may originate as a decay product of atmospheric radon (Table 1), which is afterwards deposited on to the grass by rainfall.

C. R. HILL

1960-07-16T23:59:59.000Z

215

A modelling methodology for the analysis of radon potential based on environmental geology and geographically weighted regression  

Science Journals Connector (OSTI)

Many countries have promoted environmental studies and established national radon programmes in order to identify those geographical areas where high indoor exposure risk of people to this radioactive gas are more likely to be found (often referred to ... Keywords: Environmental geology, Environmental radon potential modelling, Geographically Weighted Regression, Geostatistic, Indoor radon, Local spatial effect

Antonio Pasculli; Sergio Palermi; Annalina Sarra; Tommaso Piacentini; Enrico Miccadei

2014-04-01T23:59:59.000Z

216

Soil gas radon measurements in a region of the Bohemian Massif: investigations in the framework of an Austrian pilot study  

Science Journals Connector (OSTI)

......AGES - Austrian Agency for Health and Food Safety, Competence...the Austrian population. The health effects of indoor radon have...radon concentrations may be dangerous(2). Most people are exposed...According to the WHO, the actual health risk of indoor radon was underestimated......

Claudia Seidel; Andreas Baumgartner; Wolfgang Ringer; Joachim Gräser; Harry Friedmann; Heribert Kaineder; Franz Josef Maringer

2011-05-01T23:59:59.000Z

217

Search for pair production of scalar top quarks decaying to a tau lepton and a b quark in 1.96-tev ppbar collisions  

E-Print Network (OSTI)

I present the results of a search for pair production of scalar top quarks (~t1) in an R-parity violating supersymmetric scenario using 322 pb_1 of pp collisions at ps = 1.96 TeV collected by the upgraded Collider Detector at Fermilab. I assume each...

Khotilovich, Vadim Gennadyevich

2009-05-15T23:59:59.000Z

218

Glossary Term - Beta Decay  

NLE Websites -- All DOE Office Websites (Extended Search)

Avogadro's Number Avogadro's Number Previous Term (Avogadro's Number) Glossary Main Index Next Term (Beta Particle) Beta Particle Beta Decay Beta decay results in the emission of an electron and antineutrino, or a positron and neutrino. Beta decay is one process that unstable atoms can use to become more stable. There are two types of beta decay, beta-minus and beta-plus. During beta-minus decay, a neutron in an atom's nucleus turns into a proton, an electron and an antineutrino. The electron and antineutrino fly away from the nucleus, which now has one more proton than it started with. Since an atom gains a proton during beta-minus decay, it changes from one element to another. For example, after undergoing beta-minus decay, an atom of carbon (with 6 protons) becomes an atom of nitrogen (with 7 protons).

219

Development and management of a radon assessment strategy suitable for underground railway tunnelling projects  

Science Journals Connector (OSTI)

......annum for the duration of each project. INTRODUCTION The construction...best practice at the time of project development and for tunnelling...national authorities are at liberty to choose a different (lower...throughout the duration of the project. Pylon radon gas and radon......

C. J. Purnell; G. Frommer; K. Chan; A. A. Auch

2004-04-01T23:59:59.000Z

220

Mobility determination of lead isotopes in glass for retrospective radon measurements  

Science Journals Connector (OSTI)

......Fig-1 where Pb is seen to be depleted in the diffused profiles in...Radon in homes and risk of lung cancer: collaborative analysis of...radonexposure assessment and lung cancer risk. J. Exposure Anal...radon exposure and risk of lung cancer in Missouri. Am. J. Public......

Mikko Laitinen; Iiro Riihimäki; Jörgen Ekman; A. R. Ananda Sagari; Lennart B. Karlsson; Somjai Sangyuenyongpipat; Sergey Gorelick; Heikki Kettunen; Heikki Penttilä; Ragnar Hellborg; Timo Sajavaara; Johan Helgesson; Harry J. Whitlow

2008-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Monitoring trends in civil engineering and their effect on indoor radon  

Science Journals Connector (OSTI)

......Against Radon at Home and at Work Monitoring...discussed. The effect of energy-efficient construction...high radon levels in energy-efficient new houses...level of 26 % in average. Among the various...for such trends are energy-efficient construction...the overall energy consumption. New building concepts......

W. Ringer

2014-07-01T23:59:59.000Z

222

IMPLEMENTATION OF THE NEW INTERNATIONAL STANDARDS IN SWISS LEGISLATION ON RADON PROTECTION IN DWELLINGS  

Science Journals Connector (OSTI)

......is to be given to the remediation of new builds that fail...prevent the entry of water, water steam and radon. It...direct contact with the ground or with a dirt-floor...Proportionality of radon remediation The switch from a limit......

Martha Palacios (Gruson); Fabio Barazza; Christophe Murith; Salome Ryf

2014-10-01T23:59:59.000Z

223

Radon impact in patients with broncho-pulmonary cancer in centre areas of Transylvania  

Science Journals Connector (OSTI)

Lung cancer is the most frequent cause of mortality caused by malignancies in the world. Radon, the second recognized carcinogenic agent involved in the development of lung cancer, after smoking, is a noble gas with a high mobility. By being continuously ... Keywords: lung cancer, morpho-pathological type of the lung cancer, prevention, radon, smoking, smoking cessation

Doina Adina Todea; Constantin Cosma; Loredana Elena Rosca; Andreea Cristina Herescu; Tiberius Dicu; Natalia Neagoe

2009-09-01T23:59:59.000Z

224

Journal of Hazardous Materials 132 (2006) 98110 Assessment of environmental radon hazard using human  

E-Print Network (OSTI)

. Dosimetric calculations gave a dose conversion coefficient of 15 mSv/WLM, which is higher than the value 5 m rights reserved. Keywords: Radon; Radon progeny; Human respiratory tract; Dose conversion coefficient serve as an indicator of underground uranium ores. It can also pass the surface between the soil

Yu, K.N.

225

Meteorological Conditions Dependence of Radon Concentration in the Air above the Atlantic Ocean  

Science Journals Connector (OSTI)

... very likely to happen in June, and, finally, we have connected the concentration of radon and of its descendants to the origin of the air masses, for the air ... If the air comes from the north-west of France or from Great Britain, its radon concentration is always between 10 and 27 pc./m3; the mean speed wind blowing ...

J. FONTAN; D. BLANC; A. BOUVILLE; J. LACAZE

1963-02-09T23:59:59.000Z

226

Use of Radon to Trace the Flow Pattern of Gases in Furnaces  

Science Journals Connector (OSTI)

... cm.) has shown that the method is quite practicable. A 20 millicurie sample of radon was mixed with air in a gas-holder of about 350 litres capacity, and ... 4,000 litres per min. The aperture was of such size as to give the radon-air about the same linear velocity as the main stream. Samples of the gas ...

R. MAYORCAS; M. W. THRING

1943-12-18T23:59:59.000Z

227

Radon-222, CO, CH4 and Continental Dust over the Greenland and Norwegian Seas  

Science Journals Connector (OSTI)

... The experiment was undertaken to investigate the relationships between these parameters and air mass trajectories. Radon (222Rn)-a radioactive rare gas emanating essentially from large continental land areas-and dust ... removed by coagulation and fallout or washed out by rain or fog, although comparison of radon level and dust data may be helpful in tracing the trajectory and mixing of air ...

R. E. LARSON; R. A. LAMONTAGNE; P. E. WILKNISS; W. I. WITTMANN

1972-12-08T23:59:59.000Z

228

Radon emanation and electric potential variations associated with transient deformation near reservoir lakes  

Science Journals Connector (OSTI)

... Two of the most often cited earthquake precursors are radon emanation and electric potential variations, but these few reported examples have generally been deemed ... few reported examples have generally been deemed questionable. If a mechanism relating crustal deformation to radon emanation or electrical signals does indeed exist, it is thought to involve fluids. Some ...

M. Trique; P. Richon; F. Perrier; J. P. Avouac; J. C. Sabroux

1999-05-13T23:59:59.000Z

229

New radon cancer hazard study no cause for alarm in Britain  

Science Journals Connector (OSTI)

... subject of a major health study to determine how cancers caused by the emission of radon gas from their foundations can be prevented. ... gas from their foundations can be prevented.Radon-222, a naturally occurring radioactive gas emitted from igneous rock with uranium content such ...

Bill Johnstone

1987-02-05T23:59:59.000Z

230

Fault location by radon and mercury detection at an active volcano in Nicaragua  

Science Journals Connector (OSTI)

... Radon was detected using a sensitive film enclosed in Track Etch Detector Cups which were buried ... -30 days. Analyses of the tracks on the film were performed by the manufacturer. Radon is reported as tracks per mm2 per 30 days (0.91 tracks per mm2 ...

William B. Crenshaw; Stanley N. Williams; Richard E. Stoiber

1982-11-25T23:59:59.000Z

231

Study on radon and radium concentrations in drinking water in west region of Iran  

E-Print Network (OSTI)

One of the most important characterizations of social health is existence the availability of safe drinking water. Since one of the sources of water contamination is nuclear contamination from radon gas, so in this research radon 222 concentration levels in water supplies in the Toyserkan (a region located in the west of Iran) is investigated. For measuring radon gas in water wells and springs Lucas chamber method is used. Review the results of these measurements that taken from 15th place show that, only five sites have radon concentrations above the limit dose. To reduce radon concentration, it is better to keep water in open pools in contact with air before the water is delivered to users.

Forozani, Ghasem

2011-01-01T23:59:59.000Z

232

Search for Production of Heavy Particles Decaying to Top Quarks and Invisible Particles in $p\\bar{p}$ collisions at $\\sqrt{s}=1.96$ TeV  

SciTech Connect

We present a search for a new particle T{prime} decaying to a top-quark via T{prime} {yields} t + X, where X is an invisible particle. In a data sample with 4.8 fb{sup -1} of integrated luminosity collected by the CDF II detector at Fermilab in p{bar p} collisions with {radical}s = 1.96 TeV, we search for pair production of T0 in the lepton+jets channel, p{bar p} {yields} t{bar t} + XX {yields} {ell}{nu}bqq{prime}b + XX. We interpret our results primarily in terms of a model where T{prime} are exotic fourth generation quarks and X are dark matter particles. The data are consistent with standard model expectations, and we set 95% confidence level limits on the generic production of T{prime}{bar T}{prime} {yields} t{bar t} + XX. We apply these limits to the dark matter model and exclude the fourth generation exotic quarks T{prime} at 95% confidence level up to m{sub T{prime}} = 360 GeV/c{sup 2} for m{sub x} {<=} 100 GeV/c{sup 2}.

Aaltonen, T.; /Helsinki Inst. of Phys.; Alvarez Gonzalez, B.; /Oviedo U. /Cantabria Inst. of Phys.; Amerio, S.; /INFN, Padua; Amidei, D.; /Michigan U.; Anastassov, A.; /Northwestern U.; Annovi, A.; /Frascati; Antos, J.; /Comenius U.; Apollinari, G.; /Fermilab; Appel, J.A.; /Fermilab; Apresyan, A.; /Purdue U.; Arisawa, T.; /Waseda U. /Dubna, JINR

2011-03-01T23:59:59.000Z

233

Measurement of Higgs boson production in the diphoton decay channel in $pp$ collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector  

E-Print Network (OSTI)

A measurement of the production processes of the recently discovered Higgs boson is performed in the two-photon final state using 5.4 fb$^{-1}$ of proton-proton collisions data at $\\sqrt{s}=7$ TeV and 20.3 fb$^{-1}$ at $\\sqrt{s}=8$ TeV collected by the ATLAS detector at the Large Hadron Collider. The number of observed Higgs boson decays to diphotons divided by the corresponding Standard Model prediction, called the signal strength, is found to be $\\mu = 1.17 \\pm 0.27$ at the value of the Higgs boson mass measured by ATLAS, $m_{H}$ = 125.4 GeV. The analysis is optimized to measure the signal strengths for individual Higgs boson production processes at this value of $m_{H}$. They are found to be $\\mu_{\\mathrm{ggF}} = 1.32 \\pm 0.38$, $\\mu_{\\mathrm{VBF}} = 0.8 \\pm 0.7$, $\\mu_{{WH}} = 1.0 \\pm 1.6 $, $\\mu_{{ZH}} = 0.1 ^{+3.7}_{-0.1} $, $\\mu_{{t\\bar{t}H}} = 1.6 ^{+2.7}_{-1.8} $, for Higgs boson production through gluon fusion, vector-boson fusion, and in association with a $W$ or $Z$ boson or a top-quark pair, respectively. Compared with the previously published ATLAS analysis, the results reported here also benefit from a new energy calibration procedure for photons and the subsequent reduction of the systematic uncertainty on the diphoton mass resolution. No significant deviations from the predictions of the Standard Model are found.

ATLAS Collaboration

2014-09-09T23:59:59.000Z

234

Decay of accelerated particles  

Science Journals Connector (OSTI)

We study how the decay properties of particles are changed by acceleration. It is shown that under the influence of acceleration (1) the lifetime of particles is modified and (2) new processes (such as the decay of the proton) become possible. This is illustrated by considering scalar models for the decay of muons, pions, and protons. We discuss the close conceptual relation between these processes and the Unruh effect.

Rainer Müller

1997-07-15T23:59:59.000Z

235

Neutrinoless Quadruple Beta Decay  

E-Print Network (OSTI)

We point out that lepton number violation is possible even if neutrinos are Dirac particles. We illustrate this by constructing a simple model that allows for lepton number violation by four units only. As a consequence, neutrinoless double beta decay is forbidden, but neutrinoless quadruple beta decay is possible: $(A,Z) \\to (A,Z+4) + 4 e^-$. We identify three candidate isotopes for this decay, the most promising one being Nd-150 due to its high $Q_{0\

Julian Heeck; Werner Rodejohann

2013-06-03T23:59:59.000Z

236

Majorons and muon decay  

Science Journals Connector (OSTI)

The existence of a massless Goldstone boson coupling to neutrinos in theories with spontaneous violation of a global B-L symmetry may be consequential in precision measurements of the parameters in muon decay. We calculate the decay parameters for ??eMM, where the Majoron M is the Goldstone boson, and discuss limits on the Majoron-neutrino coupling.

T. Goldman; Edward W. Kolb; G. J. Stephenson; Jr.

1982-11-01T23:59:59.000Z

237

Muon Decay Deep Underground  

Science Journals Connector (OSTI)

A measurement of delayed coincidences characteristic of muon decay has been made at a depth of 1440-hg/cm2 standard rock with a 200-liter liquid scintillation detector. These results are consistent with the decay rate predicted from the depth-intensity curve for the penetrating component of the cosmic rays, providing independent evidence that this component is energetic muons.

W. R. Kropp; Jr.; F. Reines; R. M. Woods; Jr.

1968-06-17T23:59:59.000Z

238

Rare hadronic B decays  

E-Print Network (OSTI)

Rare hadronic B-meson decays allow us to study CP violation. The class of B decays final states containing two vector mesons provides a rich set of angular correlation observables to study. This article reviews some of the recent experimental results from the BaBar and Belle collaborations.

A. J. Bevan

2006-06-02T23:59:59.000Z

239

Neutrinoless double beta decay  

Science Journals Connector (OSTI)

Present status of the search for 0??? decay and of the related theoretical questions is reviewed. The mechanism of the decay and how to recognize it is discussed first followed by the relation of the effective neutrino Majorana mass and the oscillation parameters and the problems of nuclear matrix elements. The planned ? 100 kg experiments are briefly described.

Petr Vogel

2006-01-01T23:59:59.000Z

240

BES Results on Charmonium Decays and Transitions  

E-Print Network (OSTI)

Results are reported based on samples of 58 million $J/\\psi$ and 14 million $\\psi(2S)$ decays obtained by the BESII experiment. Improved branching fraction measurements are determined, including branching fractions for $J/\\psi\\to\\pi^+\\pi^-\\pi^0$, $\\psi(2S)\\to \\pi^0 J/\\psi$, $\\eta J/\\psi$, $\\pi^0 \\pi^0 J/\\psi$, anything $J/\\psi$, and $\\psi(2S)\\to\\gamma\\chi_{c1},\\gamma\\chi_{c2}\\to\\gamma\\gamma\\jpsi$. Using 14 million $\\psi(2S)$ events, $f_0(980)f_0(980)$ production in $\\chi_{c0}$ decays and $K^*(892)^0\\bar K^*(892)^0$ production in $\\chi_{cJ}~(J=0,1,2)$ decays are observed for the first time, and branching ratios are determined.

Frederick A. Harris

2004-09-29T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Recent Results on Semileptonic Decays at Babar  

SciTech Connect

Some recent BABAR results on semileptonic decays are presented. They focus on the determination of the CKM matrix elements |V{sub ub}| and |V{sub cb}| in inclusive and exclusive b {yields} u{ell}v and b {yields} c{ell}v decays, and on form factors measurement in exclusive c {yields} s{ell}v decays. Semileptonic decays play a crucial role in the determination of the unitarity triangle parameters: decays of the b quark give access to the CKM matrix elements |V{sub ub}| and |V{sub cb}|, while charm decays provide a way to validate lattice QCD computations through form factors measurements. Such calculations provide theoretical inputs that are used, especially, in the b sector. A lot of new results have been obtained by the BABAR collaboration during the last years, thanks to the large b{bar b} and c{bar c} production cross-sections and to the large recorded statistics. Some of these measurements are presented here.

Serrano, Justine; /Orsay, LAL

2011-11-07T23:59:59.000Z

242

B Decay Length  

NLE Websites -- All DOE Office Websites (Extended Search)

Threshold Decay Length Threshold Decay Length Data from 292 B events are in an Excel spreadsheet that looks like this table. To find the threshold decay length: Sort the data by descending decay lengths, dt. Run Event No. B Mass GeV/c2 ptB GeV/c dt cm Velocity v/c Lab Lifetime sec Rest Lifetime sec Bin 65160 642324 5.277 7.966 0.388 66500 89978 5.274 20.508 0.940 Get the data. Make a histogram of decay lengths. Rather than graphing all the lengths as individual points, physicists group the data. They consider the range of the data and divide it into "bins" of equal size. A histogram is a graph of the number of events in each bin vs. the bin range. We are looking for the smallest decay length that fits the exponential curve. This will indicate the length of the decay as detemined by that experimental run.

243

Event generator for J/? and ?(2S) decay  

Science Journals Connector (OSTI)

We have developed a Monte Carlo generator for simulating charmonium J/? and ?(2S) inclusive decay. In the model, charmonium decay via gluons is described by the QCD partonic theory, and the partonic hadronization is handled by the LUND model. Extended C- and G-parity conservation are assumed and abnormal suppression effects of charmonium decay are included. This model reproduces the properties of hadronic events in the charmonium inclusive decay, such as the branching ratios of hadronic resonance, the ratios of stable hadrons and the radiative products, and as the global properties of hadronic events.

J. C. Chen, G. S. Huang, X. R. Qi, D. H. Zhang, and Y. S. Zhu

2000-06-23T23:59:59.000Z

244

Ground radon survey of a geothermal area in Hawaii | Open Energy  

Open Energy Info (EERE)

radon survey of a geothermal area in Hawaii radon survey of a geothermal area in Hawaii Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Ground radon survey of a geothermal area in Hawaii Abstract Rates of ground radon emanation, inthe Puna geothermal area on the lower east riftof Kilauea volcano, were measured by alpha particle sensitive cellulose nitrate films. The survey successfully defined an area of thermal significance associated with the rift structure,and suggests that a thermally driven ground gas convection system exists within, and peripheralto, the rift. This type of survey was found suitable for the basaltic island environment characteristic of Hawaii and is now used in Hawaii as a routine geothermal exploration technique. Author Malcolm E. Cox Published Journal

245

Radon Concentration in Groundwater in the Central Region of Gyeongju, Korea - 13130  

SciTech Connect

Radon is a naturally occurring radioactive gas that is a well known cause of lung cancer through inhalation. Nevertheless, stomach cancer can also occur if radon-containing water is ingested. This study measured the radon concentration in groundwater for drinking or other domestic uses in the central region of Gyeongju, Korea. The groundwater samples were taken from 11 points chosen from the 11 administrative districts in the central region of Gyeongju by selecting a point per district considering the demographic distribution including the number of tourists who visit the ancient ruins and archaeological sites. The mean radon concentrations in the groundwater samples ranged from 14.38 to 9050.73 Bq.m{sup -3}, which were below the recommendations by the U.S. EPA and WHO. (authors)

Lee, Jung Min; Lee, A. Rim; Park, Chan Hee; Moon, Joo Hyun [Dongguk University, Seokjangdong, Gyeongju, Gyeongbuk, 780-714 (Korea, Republic of)] [Dongguk University, Seokjangdong, Gyeongju, Gyeongbuk, 780-714 (Korea, Republic of)

2013-07-01T23:59:59.000Z

246

Radon entry rate analyses using in situ tracer gas method application  

Science Journals Connector (OSTI)

......underestimate the complexity of energy retrofitting itself. In...Hazards Associated With Home Energy Retrofits. (2012) The National Renewable Energy Laboratory, U.S. Department...for the purpose of radon mitigation effectiveness proper evaluation......

A. Fro?ka; K. Jílek

2014-07-01T23:59:59.000Z

247

Preventing radon in new homes well worth it in the UK  

Science Journals Connector (OSTI)

Implementing basic preventive measures against radon in new homes is likely to be a “highly cost effective public health intervention”, with the potential to make a “modest but worthwhile” contribution to reducin...

2009-02-01T23:59:59.000Z

248

Indoor radon concentration measurements in some dwellings of the Penisola Sorrentina, South Italy  

Science Journals Connector (OSTI)

......multiple groups were performed by non-parametric Kruskal-Wallis test. All statistical analyses were performed using...values are represented by dots. The application of Kruskal-Wallis test demonstrated that the annual radon concentrations......

Maria Quarto; Mariagabriella Pugliese; Filomena Loffredo; Vincenzo Roca

2013-09-01T23:59:59.000Z

249

Radon levels and doses in dwellings in two villages in Kosovo, affected by depleted uranium  

Science Journals Connector (OSTI)

......villages in Kosovo, affected by depleted uranium G. Nafezi 1 A. Gregoric 2...included in the study was hit by depleted uranium projectiles during the North...1999. Although no impact of depleted uranium on radon levels has been observed......

G. Nafezi; A. Gregoric; J. Vaupotic; M. Bahtijari; M. Kuqali

2014-02-01T23:59:59.000Z

250

RADIATIOh RESEARCH 142,61-69 (1995) The Biological Effectiveness of Radon-ProgenyAlpha Particles.  

E-Print Network (OSTI)

for uranium miners or on data derived from A-bomb sur- vivors; comparison of domestic radon risk estimates studied. (d)The conversion from effective dose per unit exposure in a mine to effective dose per unit

Brenner, David Jonathan

251

Development and application of the scintillation flask technique for the measurement of indoor radon-222 concentrations  

E-Print Network (OSTI)

continuous occupancy to conservatively calculate the number of WLM/year a person might receive. 29 TABLE 6 Radon Exposures (WLM/yr) in Selective Buildings on the Texas A 6 M University Campus. Minimum" ~MLM/ r Maximum* ~MLM/ Average* ~MLM... continuous occupancy to conservatively calculate the number of WLM/year a person might receive. 29 TABLE 6 Radon Exposures (WLM/yr) in Selective Buildings on the Texas A 6 M University Campus. Minimum" ~MLM/ r Maximum* ~MLM/ Average* ~MLM...

Vasquez, Gerard Michael

2012-06-07T23:59:59.000Z

252

The influence of fractal size distribution of covers on radon exhalation from uranium mill tailings  

Science Journals Connector (OSTI)

Tailings produced during mining and milling of uranium ores represent potentially large volumes of low level radioactive materials. A typical environmental problem associated with mill tailings is radon emanation. Covering tailings is widely applied to reduce radon exhalation rate. In this paper, the fractal theories and field covering tests are used to study the fractal characters of size distribution of six types of covering materials, including waste rock, sand, laterite, kaolin, mixture of sand and laterite, and mixture of waste rock and laterite, and their influences on radon exhalation. The size distributions of uranium tailings and the six aforementioned covering materials all exhibit a good fractal structure. The contents of fine grain increase with the increasing value of fractal dimension. The results of field radon measurement show that the radon emanation rate of tailings without covers is 14.7–18.6 Bq/m2 s. Covering tests were carried out of the six abovementioned covering materials with thickness of 0.4 m, 0.8 m, 1.2 m, 1.6 m and 2.0 m. The results indicate that the application of these materials for cover layers can decrease the radon exhalation rate markedly. The effectiveness of a cover layer in reducing radon exhalation is related to its fractal texture of size distribution. Under the same thickness conditions, the attenuation coefficient of radon exhalation rate increases with the increasing fractal dimension of size distribution of covers. The empirical expressions of the attenuation coefficients in relation to fractal dimension D of size distribution and thickness x of covers is obtained for evaluating the effectiveness of final covers for uranium tailings impoundments.

Kaixuan Tan; Zehua Liu; Liangshu Xia; Junwen Lv; Hanqiao Hu

2012-01-01T23:59:59.000Z

253

Estimation of heat and chemical fluxes from a seafloor hydrothermal vent field using radon measurements  

Science Journals Connector (OSTI)

... exists at about 200 m above the depth of the vent field12'13. Distinct excess radon levels have been observed at Endeavour both in vent water and in the effluent plume ... vent water and in the effluent plume up to 17 km from the ridge axis14.Radon is a chemically inert gas with a radioactive half life of 3.85 days. ...

N. D. Rosenberg; J. E. Lupton; D. Kadko; R. Collier; M. D. Lilley; H. Pak

1988-08-18T23:59:59.000Z

254

Development of a method for determination of radon emanation from small soil samples  

E-Print Network (OSTI)

DEVELOPMENT OF A METHOD FOR DETERMINATION OF RADON EMANATION FROM S~ SOIL SAMPLES A Thesis by MICHAEL VINCENT MADONIA Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 1990 Major Subject: Health Physics DEVELOPMENT OF A METHOD FOR DETERMINATION OF RADON EMANATION FROM SMALL SOIL SAMPLES A Thesis by MICHAEL VINCENT MADONIA Approved as to style and content by: Milton E. Mc...

Madonia, Michael Vincent

2012-06-07T23:59:59.000Z

255

Charmless B Decays  

SciTech Connect

Rare charmless hadronic B decays are a good testing ground for the standard model. The dominant amplitudes contributing to this class of B decays are CKM suppressed tree diagrams and b {yields} s or b {yields} d loop diagrams (''penguins''). These decays can be used to study interfering standard model (SM) amplitudes and CP violation. They are sensitive to the presence of new particles in the loops, and they provide valuable information to constrain theoretical models of B decays. The B factories BABAR at SLAC and Belle at KEK produce B mesons in the reaction e{sup +}e{sup -} {yields} {Upsilon}(4S) {yields} B{bar B}. So far they have collected integrated luminosities of about 406 fb{sup -1} and 600 fb{sup -1}, respectively. The results presented here are based on subsets of about 200-500 fb{sup -1} and are preliminary unless a journal reference is given.

Gradl, Wolfgang; /Edinburgh U.

2007-03-06T23:59:59.000Z

256

Neutrinoless Double $?$-Decay  

E-Print Network (OSTI)

The neutrinoless double $\\beta$-decay is reviewed. Model independent evidence in favor of neutrino masses and mixing is briefly summarized. The data of the recent experiments on the search for $0\

S. M. Bilenky

2004-03-23T23:59:59.000Z

257

Influence of radon diffusion on the /sup 210/Pb distribution in sediments  

SciTech Connect

A mathematical model is presented which describes the distribution of radon 222 in sediments having a constant or variable depth distribution of radium 226. The model is extended to the distribution of lead 210, taking into account the mobility of radon (the precursor of /sup 210/Pb) within the sediment column. The /sup 210/Pb model is compared, at constant radium activity, with the conventional approach which disregards the radon diffusion when estimating sedimentation rates by the /sup 210/Pb method. The ratio between apparent and real sedimentation rate, s'/s, expressed as a function of three dimensionless parameters, demonstrates the importance of the radon diffusion effect. This effect is particularly important for sediments with small initial excess /sup 210/Pb activity, small sedimentation rate, large radon diffusivity, or a combination of these factors. Applied to Lake Geneva, the sedimentation is estimated to be larger by 30--50% than the original value by Krishnaswami et al, (1971). In sediments which are mixed at the surface (physical mixing or bioturbation), the /sup 210/PB activity in the mixed layer is diminished compared to that in the settling sediment material (Robbins et al., 1977), and radon diffusion makes the activity difference even larger, especially for low initial excess /sup 210/Pb activity, small sedimentation rate, and large mixing intensity. This result may be of importance for the balance of /sup 210/Pb in an aquatic system if the calculations are based on activities measured in the sediment.

Imboden, D.M.; Stiller, M.

1982-01-20T23:59:59.000Z

258

Decay of Np93232  

Science Journals Connector (OSTI)

The decay of Np93232 has been studied by ? spectroscopy with a Ge(Li) spectrometer. The energies and relative intensities of 24 ? peaks have been determined. A decay scheme with two new energy levels at 1098.2 and 1146.3 keV is proposed. The level at 1193.9 keV has been confirmed. Electron-capture branching intensities are given.

R. Weiss-Reuter; H. Münzel; G. Pfennig

1972-10-01T23:59:59.000Z

259

Double Beta Decay  

E-Print Network (OSTI)

The motivation, present status, and future plans of the search for the neutrinoless double beta decay are reviewed. It is argued that, motivated by the recent observations of neutrino oscillations, there is a reasonable hope that neutrinoless double beta decay corresponding to the neutrino mass scale suggested by oscillations, of about 50 meV, actually exists. The challenges to achieve the sensitivity corresponding to this mass scale, and plans to overcome them, are described.

Steven R. Elliott; Petr Vogel

2002-02-27T23:59:59.000Z

260

Search for WH production with a light Higgs boson decaying to prompt electron-jets in proton–proton collisions at root s= 7 TeV with the ATLAS detector  

E-Print Network (OSTI)

of the Standard Model (SM) Higgs boson [3–5] at this mass.and the branching ratio of a Higgs boson decaying to promptas a function of a Higgs boson mass in the range from 100 to

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Search for the Standard Model Higgs boson decaying to two W bosons at CMS .  

E-Print Network (OSTI)

??In this thesis, we search for the production of the Standard Model Higgs boson at the Large Hadron Collider, through its decay mode to two… (more)

Xie, Si, Ph. D. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

262

Lead-210 and Polonium-210 in Human Tissues  

Science Journals Connector (OSTI)

... Table 1. RADON DECAY PKODUCTS Nuclide Half-life (ref. 2) Decay ... DECAY PKODUCTS Nuclide Half-life (ref. 2) DecayRadon Short-lived daughters

R. V. OSBORNE

1963-07-20T23:59:59.000Z

263

Slepton Discovery in Electroweak Cascade Decay  

E-Print Network (OSTI)

The LHC studies on the MSSM slepton sector have mostly been focused on direct slepton Drell-Yan pair production. In this paper, we analyze the case when the sleptons are lighter than heavy neutralinos and can appear in the on-shell decay of neutralino states. In particular, we have studied the \\chi_1^\\pm \\chi_2^0 associated production, with the consequent decays of \\chi_1^\\pm and \\chi_2^0 via on-shell sleptons. The invariant mass of the lepton pairs, m_{\\ell\\ell}, from the neutralino decay has a distinctive triangle shape with a sharp kinematic cutoff. We discuss the utilization of this triangle shape in m_{\\ell\\ell} distribution to identify the slepton signal. We studied the trilepton plus missing E_T signal and obtained the effective cross section, \\sigma \\times BR \\times acceptance, that is needed for a 5\\sigma discovery as a function of the cutoff mass for the LHC with center of mass energy 14 TeV and 100 fb^{-1} integrated luminosity. Our results are model independent such that they could be applied to other models with similar decay topology. When applied to the MSSM under simple assumptions, it is found that with 100 fb^{-1} integrated luminosity, a discovery reach in the left-handed slepton mass of about 600 GeV could be reached, which extends far beyond the slepton mass reach in the usual Drell-Yan studies.

Jonathan Eckel; William Shepherd; Shufang Su

2011-11-10T23:59:59.000Z

264

Nuclear Instruments and Methods in Physics Research A 564 (2006) 319323 Passive monitoring of the equilibrium factor inside a radon exposure  

E-Print Network (OSTI)

-lived radon progeny contributes about half of the total exposure of human beings to ionizing radiation of the determined ranges of F for a few LR 115 SSNTDs can give a very good estimate of the true equilibrium factor. It is also well known that the radon dose delivered to the lungs is not attributed to the radon gas itself

Yu, K.N.

265

Giant resonance decay  

SciTech Connect

Decay studies of giant multipole resonances are discussed, emphasizing the role of Coulomb excitation with intermediate energy heavy ions, which can provide very large cross sections for both isoscalar and isovector resonances. We discuss measurement of the photon decay of one and two phonon giant resonances, reporting results where available. It is pointed out throughout the presentation that the use of E1 photons as a tag'' provides a means to observe weakly excited resonances that cannot be observed in the singles spectra. 30 refs., 16 figs., 1 tab.

Beene, J.R.; Bertrand, F.E.

1990-01-01T23:59:59.000Z

266

Large Hadron Collider Probe of Supersymmetric Neutrinoless Double-Beta-Decay Mechanism  

Science Journals Connector (OSTI)

In the minimal supersymmetric extension to the standard model, a nonzero lepton number violating coupling ?111? predicts both neutrinoless double-beta-decay and resonant single slepton production at the LHC. We show that, in this case, if neutrinoless double beta decay is discovered in the next generation of experiments, there exist good prospects to observe single slepton production at the LHC. Neutrinoless double beta decay could otherwise result from a different source (such as a nonzero Majorana neutrino mass). Resonant single slepton production at the LHC can therefore discriminate between the ?111? neutrinoless double-beta-decay mechanism and others.

B. C. Allanach; C. H. Kom; H. Päs

2009-08-25T23:59:59.000Z

267

WHY SEARCH FOR DOUBLE BETA DECAY?  

E-Print Network (OSTI)

the search for neutrinoless double beta decay may prove verySearching for neutrinoless double beta decay is the onlysensitivity of neutrinoless double beta decay. The potential

Kayser, B.

2010-01-01T23:59:59.000Z

268

Predicting New Hampshire Indoor Radon Concentrations from geologic information and other covariates  

SciTech Connect

Generalized geologic province information and data on house construction were used to predict indoor radon concentrations in New Hampshire (NH). A mixed-effects regression model was used to predict the geometric mean (GM) short-term radon concentrations in 259 NH towns. Bayesian methods were used to avoid over-fitting and to minimize the effects of small sample variation within towns. Data from a random survey of short-term radon measurements, individual residence building characteristics, along with geologic unit information, and average surface radium concentration by town, were variables used in the model. Predicted town GM short-term indoor radon concentrations for detached houses with usable basements range from 34 Bq/m{sup 3} (1 pCi/l) to 558 Bq/m{sup 3} (15 pCi/l), with uncertainties of about 30%. A geologic province consisting of glacial deposits and marine sediments, was associated with significantly elevated radon levels, after adjustment for radium concentration, and building type. Validation and interpretation of results are discussed.

Apte, M.G.; Price, P.N.; Nero, A.V.; Revzan, K.L.

1998-05-01T23:59:59.000Z

269

An indoor radon survey of the X-ray rooms of Mexico City hospitals  

SciTech Connect

This paper presents the results of measurements of indoor radon concentrations in the X-ray rooms of a selection of hospitals in the metropolitan area of Mexico City. The metropolitan area of Mexico City is Mexico's largest metropolitan area by population; the number of patients requiring the use of X-rays is also the highest. An understanding of indoor radon concentrations in X-ray rooms is necessary for the estimation of the radiological risk to which patients, radiologists and medical technicians are exposed. The indoor radon concentrations were monitored for a period of six months using nuclear track detectors (NTD) consisting of a closed-end cup system with CR-39 (Lantrack Registered-Sign ) polycarbonate as detector material. The indoor radon concentrations were found to be between 75 and 170 Bq m{sup -3}, below the USEPA-recommended indoor radon action level for working places of 400 Bq m{sup -3}. It is hoped that the results of this study will contribute to the establishment of recommended action levels by the Mexican regulatory authorities responsible for nuclear safety.

Juarez, Faustino [Facultad de Ciencias, Universidad Autonoma del Estado de Mexico, Instituto Literario No. 100. Estado de Mexico, 50000, Mexico. Instituto de Geofisica, Universidad Nacional Autonoma de Mexico, Circuito (Mexico); Reyes, Pedro G. [Facultad de Ciencias, Universidad Autonoma del Estado de Mexico, Instituto Literario No. 100. Estado de Mexico, 50000 (Mexico); Espinosa, Guillermo [Instituto de Fisica, Universidad Nacional Autonoma de Mexico, Circuito Exterior Ciudad Universitaria, Mexico D.F. Cp.04510 (Mexico)

2013-07-03T23:59:59.000Z

270

Problems Found Using a Radon Stripping Algorithm for Retrospective Assessment of Air Filter Samples  

SciTech Connect

An evaluation of a large number of air sample filters was undertaken using a commercial alpha and beta spectroscopy system employing a passive implanted planar silicon (PIPS) detector. Samples were only measured after air flow through the filters had ceased. Use of a commercial radon stripping algorithm was implemented to discriminate anthropogenic alpha activity on the filters from the radon progeny. When uncontaminated air filters were evaluated, the results showed that there was a time-dependent bias in both average estimates and measurement dispersion of anthropogenic activity estimates with the relative bias being small compared to the dispersion, indicating that the system would not give false positive indications for an appropriately set decision level. By also measuring environmental air sample filters simultaneously with electroplated alpha filters, use of the radon stripping algorithm demonstrated a number of substantial unexpected deviations from calibrated values indicating that the system would give false negative indications. Use of the current algorithm is, therefore, not recommended for general assay applications. Use of the PIPS detector should only be utilized for gross counting without appropriate modifications to the curve-fitting algorithm. As a screening method, the radon stripping algorithm might be expected to see elevated alpha activities on air sample filters (not due to radon progeny) around the 200 disintegrations per minute level.

Robert Hayes

2008-04-01T23:59:59.000Z

271

Use of a Radon Stripping Algorithm for Retrospective Assessment of Air Filter Samples  

SciTech Connect

An evaluation of a large number of air sample filters was undertaken using a commercial alpha and beta spectroscopy system employing a passive implanted planar silicon (PIPS) detector. Samples were only measured after air flow through the filters had ceased. Use of a commercial radon stripping algorithm was implemented to discriminate anthropogenic alpha and beta activity on the filters from the radon progeny. When uncontaminated air filters were evaluated, the results showed that there was a time-dependent bias in both average estimates and measurement dispersion with the relative bias being small compared to the dispersion. By also measuring environmental air sample filters simultaneously with electroplated alpha and beta sources, use of the radon stripping algorithm demonstrated a number of substantial unexpected deviations. Use of the current algorithm is therefore not recommended for assay applications and so use of the PIPS detector should only be utilized for gross counting without appropriate modifications to the curve fitting algorithm. As a screening method, the radon stripping algorithm might be expected to see elevated alpha and beta activities on air sample filters (not due to radon progeny) around the 200 dpm level.

Robert Hayes

2009-01-23T23:59:59.000Z

272

In-vivo measurements of Pb-210 to determine cumulative exposure to radon daughters: A pilot study  

SciTech Connect

The objective of this study is to demonstrate the feasibility of estimating cumulative exposure of individuals to low concentrations of radon by measuring the amount of Pb-A-10 in their skeletons. This report presents progress to date establishing the validity of an vivo technique to measure skeletal burdens of Pb-210, accumulated from exposure to radon and radon progeny. With the skeletal content of Pb--210 and a model for Pb metabolism, cumulative exposure to radon and its short-lived daughters (radon/daughters) may be calculated for use in deriving a dose-response relationship between lung cancer and exposure to radon/daughters. Data are presented for 29 subjects exposed to above-average'' radon concentrations in their homes, showing the correlation between measured Pb--210 burdens, and measured pCi/l and WLM exposure estimates. Their results are compared to measurements of a population of 24 subject's presumed exposed to average concentrations. Measurements of a Pennsylvania family exposed for a year in a home with an extremely high radon content are also presented. Update of results of an ongoing study of the biological half-time of Pb--210 in man involving measurements, of a retired radiation worker with a 40 year old skeletal burden of Pb-210.

Laurer, G.R.; Cohen, N. (New York Univ. Medical Center, Tuxedo, NY (United States). Dept. of Environmental Medicine); Stark, A.; Ju, C. (New York State Dept. of Health, Albany, NY (United States). Bureau of Environmental and Occupational Epidemiology)

1991-05-01T23:59:59.000Z

273

Removal of Xenon and Radon from Contaminated Atmospheres with Dioxygenyl Hexafluoroantimonate, O2SbF6  

Science Journals Connector (OSTI)

... process gas, and the excess fluorine must be removed afterwards. I have shown that radon, the heaviest noble gas, can be collected by oxidation with liquid bromine trifluoride and ... ). I report here further experiments with a dioxygenyl salt, O2SbF6, which reacts with radon and xenon at 25 C and which appears very promising as a reagent for removing ...

L. STEIN

1973-05-04T23:59:59.000Z

274

Vacuum Energy Decay  

E-Print Network (OSTI)

The problem of the vacuum energy decay is studied through the analysis of the vacuum survival amplitude ${\\mathcal A}(z, z')$. Transition amplitudes are computed for finite time-span, $Z\\equiv z^\\prime-z$, and their {\\em late time} behavior is discussed up to first order in the coupling constant, $\\l$.

Enrique Álvarez; Roberto Vidal

2011-11-09T23:59:59.000Z

275

Theory of Beta Decay  

Science Journals Connector (OSTI)

......pseudoscalar coupling constant, (13 1) Schwarzschild gave the data on He6 (Sc57b). thesis...data of ft values in the beta decay of mirror transitions between doubly closed shell...Ann. of Phys. 2 (1957), 407. A. Schwarzschild, Ph. D. Thesis, Columbia University......

M. Morita

1963-03-01T23:59:59.000Z

276

Training Activities on Radioactive Waste Management at Moscow SIA -Radon-: Experience, Practice, Theory  

SciTech Connect

Management of radioactive waste relates to the category of hazardous activities. Hence the requirements to the professional level of managers and personnel working in this industry are very high. Education, training and examination of managers, operators and workers are important elements of assuring safe and efficient operation of radioactive waste management sites. The International Education Training Centre (IETC) at Moscow State Unitary Enterprise Scientific and Industrial Association 'Radon' (SIA 'Radon'), in co-operation with the International Atomic Energy Agency (IAEA), has developed expertise and provided training to waste management personnel for the last 10 years. The paper summarizes the current experience of the SIA 'Radon' in the organisation and implementation of the IAEA sponsored training and others events and outlines some of strategic educational elements, which IETC will continue to pursue in the coming years. (authors)

Batyukhnova, O.G.; Arustamov, A.E.; Dmitriev, S.A.; Agrinenko, V.V. [SUE SIA -Radon-, The 7-th Rostovsky Lane 2/14, Moscow (Russian Federation); Ojovan, M.I. [Immobilisation Science Laboratory, University of Sheffield, Sir Robert Hadfield Building (United Kingdom); Drace, Z. [International Atomic Energy Agency, Vienna (Austria)

2008-07-01T23:59:59.000Z

277

Nuclear Structure Aspects of Neutrinoless Double Beta Decay  

E-Print Network (OSTI)

We decompose the neutrinoless double-beta decay matrix elements into sums of products over the intermediate nucleus with two less nucleons. We find that the sum is dominated by the J^pi=0^+ ground state of this intermediate nucleus for both the light and heavy neutrino decay processes. This provides a new theoretical tool for comparing and improving nuclear structure models. It also provides the connection to two-nucleon transfer experiments.

B. A. Brown; M. Horoi; R. A. Sen'kov

2014-09-25T23:59:59.000Z

278

Nuclear Structure Aspects of Neutrinoless Double Beta Decay  

E-Print Network (OSTI)

We decompose the neutrinoless double-beta decay matrix elements into sums of products over the intermediate nucleus with two less nucleons. We find that the sum is dominated by the J^pi=0^+ ground state of this intermediate nucleus for both the light and heavy neutrino decay processes. This provides a new theoretical tool for comparing and improving nuclear structure models. It also provides the connection to two-nucleon transfer experiments.

Brown, B A; Sen'kov, R A

2014-01-01T23:59:59.000Z

279

Radon concentrations in ground and drinking water in the state of Chihuahua, Mexico  

Science Journals Connector (OSTI)

This paper reports 222Rn concentrations in ground and drinking water of nine cities of Chihuahua State, Mexico. Fifty percent of the 114 sampled wells exhibited 222Rn concentrations exceeding 11 Bq/L, the maximum contaminant level (MCL) recommended by the USEPA. Furthermore, around 48% (123 samples) of the tap-water samples taken from 255 dwellings showed radon concentrations over the MCL. There is an apparent correlation between total dissolved solids and radon concentration in ground-water. The high levels of 222Rn found may be entirely attributed to the nature of aquifer rocks.

L. Villalba; L. Colmenero Sujo; M.E. Montero Cabrera; A. Cano Jiménez; M. Rentería Villalobos; C.J. Delgado Mendoza; L.A. Jurado Tenorio; I. Dávila Rangel; E.F. Herrera Peraza

2005-01-01T23:59:59.000Z

280

Technical manual, redesigned ARC-2A automatic radon counter. Final report  

SciTech Connect

The ARC-2A Automatic Radon Counter (Serial No. 87003) was manufactured in 1987 by Ocean Communication Systems, Inc, Panama City, Florida. It was designed as a stand-alone system, but was consistently plagued with problems. The manufacturer could not repair the machine. The ARC-2A was completely redesigned at NCCOSC RDT and E Division. It is now interfaced to a computer. A new manual was written with updated information and user instructions. The ARC-2A is an integral part of ongoing electro-optic propagation studies.... Radon, Electro-optics, Aerosol.

Littfin, K.M.

1992-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

The improvement of methods used to estimate radon concentration in air using nuclear track film  

E-Print Network (OSTI)

THE IMPROVEMENT OF METHODS USED TO ESTIMATE RADON CONCENTRATION IN AIR USING NUCLEAR TRACK FILM A Thesis by JAMES G. JESSICK Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December t 9BB Major Subject: Health Physics THE IMPROVEMENT OF METHODS USED TO ESTIMATE RADON CONCENTRATION IN AIR USING NUCLEAR TRACK FILM A Thesis by JAMES G. JESSICK Approved as to style and content by: Milton E...

Jessick, James G.

2012-06-07T23:59:59.000Z

282

Handbook on string decay  

E-Print Network (OSTI)

We explain simple semi-classical rules to estimate the lifetime of any given highly-excited quantum state of the string spectrum in flat spacetime. We discuss both the decays by splitting into two massive states and by massless emission. As an application, we study a solution describing a rotating and pulsating ellipse which becomes folded at an instant of time -- the ``squashing ellipse''. This string interpolates between the folded string with maximum angular momentum and the pulsating circular string. We explicitly compute the quantum decay rate for the corresponding quantum state, and verify the basic rules that we propose. Finally, we give a more general (4-parameter) family of closed string solutions representing rotating and pulsating elliptical strings.

Roberto Iengo; Jorge G. Russo

2006-01-11T23:59:59.000Z

283

Bremsstrahlung in ? decay  

Science Journals Connector (OSTI)

A quantum mechanical analysis of the bremsstrahlung in ? decay of 210Po is performed in close reference to a semiclassical theory. We clarify the contribution from the tunneling, mixed, outside barrier regions, and from the wall of the inner potential well to the final spectral distribution, and discuss their interplay. We also comment on the validity of semiclassical calculations, and the possibility to eliminate the ambiguity in the nuclear potential between the alpha particle and daughter nucleus using the bremsstrahlung spectrum.

N. Takigawa; Y. Nozawa; K. Hagino; A. Ono; D. M. Brink

1999-02-01T23:59:59.000Z

284

Hybrid meson decay from lattice QCD  

E-Print Network (OSTI)

Besides the conventional hadrons containing valence quarks and valence antiquarks, quantum chromodynamics (QCD) suggests the existence of the hybrid hadrons containing valence gluons in addition to the quarks and antiquarks, and some experiments may have found some. A decisive experimental confirmation of its existence, however, is still needed. At present, lattice simulations have offered the practicable ways of theoretically guiding us to search for the hybrid states. In this dissertation, we study the spectroscopy and the decay rate of the heavy hybrid mesons made of a heavy $b$ quark, a heavy $\\bar b$ antiquark, and a gluon ($b\\bar{b}g$) to selected channels, and use lattice methods to extract the transition matrix elements in full QCD. We are particular interested in the spin-exotic hybrid mesons. For sufficiently heavy quarks (e.g., $b$ quark), we use the leading Born-Oppenheimer (LBO) approximation to calculate the static potential energy at all $b\\bar{b}$ separations. Then, by solving the Schr\\"odinger equation with this potential, we reconstruct the motion of the heavy quarks. In a similar way we can determine decay rates. In this dissertation, we use the numerical lattice method to calculate the mass of the $f_0$ meson at a single lattice spacing and light quark mass, namely, $m_{f_0} = (768 \\pm 136)$ MeV. Most of all we consider the decay channels involving the production of a scalar meson. We obtain the partial decay rate ($\\Gamma$) for the channel $ H \\rightarrow \\chi_b + \\pi + \\pi $, namely, $ \\Gamma = 3.62(98)$ MeV. All of our results are consistent with those of other researchers. Knowledge of the masses and the decay rates should help us considerably in experimental searches for the hybrid mesons.

Ziwen Fu

2011-03-08T23:59:59.000Z

285

Concentrations of dissolved radon-222 in water from selected wells and springs in Idaho, 1989-91  

SciTech Connect

Concentrations of dissolved radon-222, a naturally occurring radioactive gas, are found in water in Idaho. The U.S. Geological Survey collected water samples for radon-222 analyses from 338 Idaho wells and springs during 1989-91. These water samples were collected as part of ongoing monitoring programs with the Idaho Department of Water Resources and the U.S. Department of Energy. Concentrations of dissolved radon-222 in 372 of the water samples ranged from -58{+-}30 to 5,715{+-}66 picocuries per liter; the mean and median concentrations were 446{+-}35 and 242{+-}25 picocuries per liter, respectively.

Cecil, L.D.; Parliman, D.J.; Edwards, D.D.; Young, H.W.

1994-11-01T23:59:59.000Z

286

Protection from radon exposure at home and at work in the directive 2013/59/Euratom  

Science Journals Connector (OSTI)

......national action plan). The basic...basic safety standards. On the other...are kept under review. This situation...transpose such standards into national...Radon action plan) and in Annex...schedules for reviews of the action plan (10) strategy......

F. Bochicchio

2014-07-01T23:59:59.000Z

287

Radon entry rate analyses using in situ tracer gas method application  

Science Journals Connector (OSTI)

......indoor environment, standard methods of radon diagnosis...ventilation (specific modes of HVAC systems operation...for new houses given in standards. Table-5. Results...efforts to comply with the standard requirements on new buildings...services in buildings like HVAC systems, water and gas......

A. Fro?ka; K. Jílek

2014-07-01T23:59:59.000Z

288

Monitoring trends in civil engineering and their effect on indoor radon  

Science Journals Connector (OSTI)

......with natural floors and clay houses. RADON AND ENERGY-EFFICIENT...In the European Union, the housing sector is currently responsible...building to reach a high level of energy efficiency. Within the EU-project...37 low-energy and passive houses in Austria. Both long-term......

W. Ringer

2014-07-01T23:59:59.000Z

289

A TIME-DEPENDENT METHOD FOR CHARACTERIZING THE DIFFUSION OF RADON-222 IN CONCRETE  

SciTech Connect

The porosity and diffusion length of concrete have been determined by measuring the time-dependent diffusion of radon through a thin slab of the material, One surface of the slab is exposed to a large, fixed radon concentration beginning at t=0. The radon that diffuses out of a portion of the opposite surface is collected during several contiguous time intervals. The total activity collected over a set of intervals beginning at t=0 and the steady-state flux of activity are used to calculate the porosity and diffusion length, As a test of these parameters, they are then used to predict the activity collected during other time intervals and for other sample thicknesses, Samples from two types of concrete were tested: one type yielded a porosity of 0.068 and a diffusion length of 12.6 cm; the respective values for the other were 0.32 and 16.9 cm. The predicted and experimental results agreed well, thereby verifying the assumption that concrete may be treated as a homogenous diffusion medium for radon.

Zapalac, Geordie H.

1981-07-01T23:59:59.000Z

290

Prevention of Lung Cancer by Remediation of Residential Exposure to Radon Daughters  

Science Journals Connector (OSTI)

......Exposure to Radon Daughters J.A. Mahaffey F.T. Cross J.R. Johnson M.C. Baechler The United States Bonneville Power Administration (BPA), as a part of an energy conservation programme in the states of Washington, Oregon, Idaho, Wyoming......

J.A. Mahaffey; F.T. Cross; J.R. Johnson; M.C. Baechler

1991-06-01T23:59:59.000Z

291

Dosimetric and epidemiological approaches to assessing radon doses?can the differences be reconciled?  

Science Journals Connector (OSTI)

......reconcile the two approaches. This is of importance...INTRODUCTION The management of the risk of...based on one of two approaches. The first uses...National Academy of Sciences and National Research...Amsterdam: Elsevier Science) (2003). Dosimetric...epidemiological approaches to assessing radon......

John W. Stather

2004-12-01T23:59:59.000Z

292

Does the Addition of Fly Ash to Concrete Present a Radon Hazard? J. A. Siegel1  

E-Print Network (OSTI)

Street, Suite 450, Austin, Texas, 78701, USA Summary: Fly ash, a waste material from coal-fired power of fly ash [9]. Fly ash is a waste material from coal fired power plants; when added to concrete, fly ashDoes the Addition of Fly Ash to Concrete Present a Radon Hazard? J. A. Siegel1 , M. Juenger1 and J

Siegel, Jeffrey

293

Filter for on-line air monitor unaffected by radon progeny and method of using same  

DOE Patents (OSTI)

An apparatus for testing air having contaminants and radon progeny therein. The apparatus includes a sampling box having an inlet for receiving the air and an outlet for discharging the air. The sampling box includes a filter made of a plate of sintered stainless steel. The filter traps the contaminants, yet allows at least a portion of the radon progeny to pass therethrough. A method of testing air having contaminants and radon progeny therein. The method includes providing a testing apparatus that has a sampling box with an inlet for receiving the air and an outlet for discharging the air, and has a sintered stainless steel filter disposed within said sampling box; drawing air from a source into the sampling box using a vacuum pump; passing the air through the filter; monitoring the contaminants trapped by the filter; and providing an alarm when a selected level of contaminants is reached. The filter traps the contaminants, yet allows at least a portion of the radon progeny to pass therethrough.

Phillips, Terrance D. (Aiken, SC); Edwards, Howard D. (Augusta, GA)

1999-01-01T23:59:59.000Z

294

RADON AND RADIUM CONCENTRATION IN WATER FROM NORTH-WEST OF ROMANIA AND THE ESTIMATED DOSES  

Science Journals Connector (OSTI)

......524 Bq l1 with the average of 0.085 Bq l1...population during the consumption of water. Table-2 shows that the average of committed effective...expected doses from the consumption of water in Romania...Assessment for Radon in Homes and Workplaces...International Atomic Energy Agency. International......

M. Moldovan; V. Benea; D. C. Ni??; B. Papp; B. D. Burghele; N. Bican-Bri?an; C. Cosma

2014-07-01T23:59:59.000Z

295

Diurnal and seasonal variability of outdoor radon concentration in the area of the NRPI Prague  

Science Journals Connector (OSTI)

......Against Radon at Home and at Work Diurnal...designed to be low energy consuming and independent...NRPI, where hourly averages of temperature and...Typical current consumption of the entire station...Diurnal and monthly averages of measured atmospheric...are given monthly averages of a v, of the......

K. Jilek; M. Slezákova; J. Thomas

2014-07-01T23:59:59.000Z

296

CORRELATIVE AND MULTIVARIATE ANALYSIS OF INCREASED RADON CONCENTRATION IN UNDERGROUND LABORATORY  

Science Journals Connector (OSTI)

......regression methods for the indoor radon measurements. Nucl. Technol. Radiat. Prot. (2014) 29(1):17-23. 4 Brun R. , Rademakers F. ROOT-an object oriented data analysis framework. Nucl. Inst. Methods Phys. Res. A (1997) 389:81. 5 Hoecker......

Dimitrije M. Maleti?; Vladimir I. Udovi?i?; Radomir M. Banjanac; Dejan R. Jokovi?; Aleksandar L. Dragi?; Nikola B. Veselinovi?; Jelena Filipovi?

2014-07-01T23:59:59.000Z

297

Radon spectroscopy of packet delay Andre Broido, Ryan King, Evi Nemeth, kc claffy  

E-Print Network (OSTI)

techniques, specifically the Radon transform previously applied in geophysics [6] and computer tomography [7 the feasibility of Internet spectroscopy techniques for analysis of rate limiting, packet interarrival delay packet trace data, we find that delay's quantization in micro- and millisecond range is ubiquitous

California at San Diego, University of

298

395NUCLEAR ENGINEERING AND TECHNOLOGY, VOL.37 NO.4, AUGUST 2005 CONSTRUCTION OF AN ENVIRONMENTAL RADON  

E-Print Network (OSTI)

395NUCLEAR ENGINEERING AND TECHNOLOGY, VOL.37 NO.4, AUGUST 2005 CONSTRUCTION OF AN ENVIRONMENTAL RADON MONITORING SYSTEM USING CR-39 NUCLEAR TRACK DETECTORS GIL HOON AHN* and JAI-KI LEE1 National Nuclear Management & Control Agency 305-600, POX 114 Yuseong, Daejeon, Korea 1 Dept. of Nuclear

299

CP violations in ?± meson decay  

Science Journals Connector (OSTI)

We study the pion decays with intermediate on-shell neutrinos N into two electrons and a muon, ?± ? e±N ? e±e±??. We investigate the branching ratios Br± = [?(?? ? e?e??+?) ± ?(?+ ? e+e+???)]/?(?? ? all) and the CP asymmetry ratio for such decays, in the scenario with two different on-shell neutrinos. If N is Dirac, only the lepton number conserving (LC) decays contribute (LC: ? = ?e or ); if N is Majorana, both LC and lepton number violating (LV) decays contribute (LV: or ? = ??). The results show that the CP asymmetry is in general very small, but increases and becomes ~1 when the masses of the two intermediate neutrinos get closer to each other, i.e., when their mass difference becomes comparable with their decay width, . The observation of CP violation in pion decays would be consistent with the existence of the well-motivated ?MSM model with two almost degenerate heavy neutrinos.

Gorazd Cveti?; C S Kim; Jilberto Zamora-Saá

2014-01-01T23:59:59.000Z

300

Semileptonic B and Lambda_b Decays and Local Duality in QCD  

E-Print Network (OSTI)

The inclusive and exclusive semileptonic decay distributions for b -> c decay are computed in the Shifman-Voloshin limit. The inclusive decay distributions (computed using an operator product expansion) depend on quark masses, and the exclusive decay distributions depend on hadron masses. Nevertheless, we show explicitly how the first two terms in the 1/m expansion match between the inclusive and exclusive decays. Agreement between the inclusive and exclusive decay rates requires a minimum smearing region of size Lambda_QCD before local duality holds in QCD. The alpha_s corrections to the inclusive and exclusive decay rates are also shown to agree to order (log m)/m^2. The alpha_s/m^2 corrections are used to obtain the alpha_s correction to Bjorken's inequality on the slope of the Isgur-Wise function.

C. Glenn Boyd; Benjamin Grinstein; Aneesh V. Manohar

1995-11-03T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

A precision measurement of the muon decay parameter delta  

E-Print Network (OSTI)

The muon decay parameter delta characterizes momentum dependence of the parity-violating muon decay asymmetry. A new measurement of delta has been performed using the first physics data recorded by the TWIST experiment at TRIUMF. The obtained value, delta=0.74964+-0.00066(stat.)+-0.00112(syst.), is consistent with the Standard Model expectation delta=3/4. This is the first determination of delta performed using a blind analysis technique. Combined with other data, the measurement sets new model-independent limits on effective right-handed couplings of the muon. Improved limits on the product of another muon decay parameter, xi, and the muon polarization in pion decay, Pmu, are obtained in the form: 0.9960Pmu*xi<=xi<1.0040, at 90% confidence level. Implications for left-right symmetric models are discussed.

Gaponenko, Andrei

2011-01-01T23:59:59.000Z

302

A precision measurement of the muon decay parameter delta  

E-Print Network (OSTI)

The muon decay parameter delta characterizes momentum dependence of the parity-violating muon decay asymmetry. A new measurement of delta has been performed using the first physics data recorded by the TWIST experiment at TRIUMF. The obtained value, delta=0.74964+-0.00066(stat.)+-0.00112(syst.), is consistent with the Standard Model expectation delta=3/4. This is the first determination of delta performed using a blind analysis technique. Combined with other data, the measurement sets new model-independent limits on effective right-handed couplings of the muon. Improved limits on the product of another muon decay parameter, xi, and the muon polarization in pion decay, Pmu, are obtained in the form: 0.9960Pmu*xi<=xi<1.0040, at 90% confidence level. Implications for left-right symmetric models are discussed.

Andrei Gaponenko

2011-04-14T23:59:59.000Z

303

Calculation of gamma radiation dose rate and radon concentration due to granites used as building materials in Iran  

Science Journals Connector (OSTI)

......G. Magusa, North Cyprus, via Mersin 10, Turkey Natural radioactivity concentrations...equivalent from all natural sources of radiation...health(4). Radon gas is a radionuclide present...to determining the natural radioactivity concentration......

A. Abbasi

2013-07-01T23:59:59.000Z

304

Identification of anomalous radon concentrations due to geodynamic processes by elimination of Rn variations caused by other factors  

Science Journals Connector (OSTI)

......dissolved in underground water (Mishel 1987...fluctuations in atmospheric pressure (Dowell...usually a major generator of radon in underground...convection due to lower atmospheric heating. Towards...the underground water, at Fuchu Observatory......

M. Finkelstein; S. Brenner; L. Eppelbaum; E. Ne'Eman

1998-05-01T23:59:59.000Z

305

Influence of energy-saving measures on the radon concentration in some kindergartens in the Czech Republic  

Science Journals Connector (OSTI)

......improvements to the energy efficiency of the buildings...increasing the energy efficiency of buildings...villa-type house built at the...et al. Home energy efficiency and radon related...Energy and Passive Houses in Austria......

I. Fojtikova; K. Navratilova Rovenska

2014-07-01T23:59:59.000Z

306

Formation of $??$ atoms in $K_{?4} decay  

E-Print Network (OSTI)

We derive the decay rate of $\\pi\\mu$ atom formation in $K_{\\mu 4}$ decay. Using the obtained expressions we calculate the decay rate of atom formation and point out that considered decay can give a noticeable contribution as a background to the fundamental decay $K^+\\to \\pi^+\

S. R. Gevorkyan; A. V. Tarasov; O. O. Voskresenskaya

2009-12-01T23:59:59.000Z

307

Sediment-water chemical exchange in the coastal zone traced by in situ radon-222 flux measurements  

SciTech Connect

In situ radon-222 flux experiments conducted in benthic chambers in Cape Lookout Bight, a small marine basin on the North Carolina coast, reveal that enhanced chemical transport across the sediment-water interface during summer months is caused by abiogenic bubble tube structures. Transport rates for dissolved radon, methane, and ammonium more than three times greater than those predicted on the basis of molecular diffusion occur when open tubes are maintained by semidiurnal low-tide bubbling.

Martens, C.S. (Univ. of North Carolina, Chapel Hill); Kipphut, G.W.; Klump, J.V.

1980-04-18T23:59:59.000Z

308

Decay of Ar41  

Science Journals Connector (OSTI)

A weak gamma ray has been found in the decay of Ar41 to K41. The energy of the gamma ray is 1.664±0.007 MeV; and its intensity, relative to that of the strong 1.293-MeV gamma ray, is (5±2)×10-4. It is concluded from the results of conincidence measurements that this gamma ray is the result of a beta-ray branch from Ar41 leading to an excited state in K41 at 1.664 MeV. The associated logft value is found to be 7.7±0.3. The spin and parity of the 1.664-MeV state in K41 are most probably 52+ or 72+.

William W. Pratt

1965-08-09T23:59:59.000Z

309

B, D and K Decays  

SciTech Connect

The present report documents the results of Working Group 2: B, D and K decays, of the workshop on Flavor in the Era of the LHC, held at CERN from November 2005 through March 2007. With the advent of the LHC, we will be able to probe New Physics (NP) up to energy scales almost one order of magnitude larger than it has been possible with present accelerator facilities. While direct detection of new particles will be the main avenue to establish the presence of NP at the LHC, indirect searches will provide precious complementary information, since most probably it will not be possible to measure the full spectrum of new particles and their couplings through direct production. In particular, precision measurements and computations in the realm of flavor physics are expected to play a key role in constraining the unknown parameters of the Lagrangian of any NP model emerging from direct searches at the LHC. The aim of Working Group 2 was twofold: on one hand, to provide a coherent, up-to-date picture of the status of flavor physics before the start of the LHC; on the other hand, to initiate activities on the path towards integrating information on NP from high-p{sub T} and flavor data. This report is organized as follows. In Sec. 1, we give an overview of NP models, focusing on a few examples that have been discussed in some detail during the workshop, with a short description of the available computational tools for flavor observables in NP models. Sec. 2 contains a concise discussion of the main theoretical problem in flavor physics: the evaluation of the relevant hadronic matrix elements for weak decays. Sec. 3 contains a detailed discussion of NP effects in a set of flavor observables that we identified as 'benchmark channels' for NP searches. The experimental prospects for flavor physics at future facilities are discussed in Sec. 4. Finally, Sec. 5 contains some assessments on the work done at the workshop and the prospects for future developments.

Artuso, M.; Asner, D.M.; Ball, P.; Baracchini, E.; Bell, G.; Beneke, M.; Berryhill, J.; Bevan, A.; Bigi, I.I.; Blanke, M.; Bobeth, Ch.; Bona, M.; Borzumati, F.; Browder, T.; Buanes, T.; Buchalla, G.; Buchmuller, O.; Buras, A.J.; Burdin, S.; Cassel, D.G.; Cavanaugh, R.; /Syracuse U. /Carleton U. /Durham U., IPPP /Rome U. /INFN, Rome /Karlsruhe U. /RWTH Aachen U. /Fermilab /Queen Mary, U. of London /Notre Dame U. /Munich, Tech. U. /Munich, Max Planck Inst. /Dortmund U. /Annecy, LAPP /ICTP, Trieste /Taiwan, Natl. Central U. /Hawaii U. /Bergen U. /Munich U. /CERN /Liverpool U.

2008-03-07T23:59:59.000Z

310

Rare b hadron decays at the LHC  

E-Print Network (OSTI)

With the completion of Run~I of the CERN Large Hadron Collider, particle physics has entered a new era. The production of unprecedented numbers of heavy-flavoured hadrons in high energy proton-proton collisions allows detailed studies of flavour-changing processes. The increasingly precise measurements allow to probe the Standard Model with a new level of accuracy. Rare $b$ hadron decays provide some of the most promising approaches for such tests, since there are several observables which can be cleanly interpreted from a theoretical viewpoint. In this article, the status and prospects in this field are reviewed, with a focus on precision measurements and null tests.

Blake, T; Hiller, G

2015-01-01T23:59:59.000Z

311

Search for neutrinoless decays of the ? lepton  

E-Print Network (OSTI)

We have searched for neutrinoless ? decays into three charged particles. Evidence of such decays would demonstrate nonconservation of lepton flavor and, in some cases, lepton number. We see no signal for any such neutrinoless ? decays and set upper...

Baringer, Philip S.

1990-02-01T23:59:59.000Z

312

NIDC: Online Catalog of Isotope Products | Request a New Product  

NLE Websites -- All DOE Office Websites (Extended Search)

Request a New Product Request a New Product Step 1 - Enter the new product's criteria below. Element Name Actinium Aluminum Americium Antimony Argon Arsenic Astatine Barium Berkelium Beryllium Bismuth Bohrium Boron Bromine Cadmium Caesium Calcium Californium Carbon Cerium Chlorine Chromium Cobalt Copernicium Copper Curium Darmstadtium Dubnium Dysprosium Einsteinium Erbium Europium Fermium Fluorine Francium Gadolinium Gallium Germanium Gold Hafnium Hassium Helium Holmium Hydrogen Indium Iodine Iridium Iron Krypton Lanthanum Lawrencium Lead Lithium Lutetium Magnesium Manganese Meitnerium Mendelevium Mercury Molybdenum Neodymium Neon Neptunium Nickel Niobium Nitrogen Nobelium Osmium Oxygen Palladium Phosphorus Platinum Plutonium Polonium Potassium Praseodymium Promethium Protactinium Radium Radon Rhenium Rhodium Roentgenium Rubidium Ruthenium Rutherfordium Samarium Scandium Seaborgium Selenium Silicon Silver Sodium Strontium Sulfur Tantalum Technetium Tellurium Terbium Thallium Thorium Thulium Tin Titanium Tungsten Ununhexium Ununoctium Ununpentium Ununquadium Ununseptium Ununtrium Uranium Vanadium Xenon Ytterbium Yttrium Zinc Zirconium

313

CP VIOLATION IN KL DECAYS Updated May 2010 by L. Wolfenstein (Carnegie-Mellon Univer-  

E-Print Network (OSTI)

­ 1­ CP VIOLATION IN KL DECAYS Updated May 2010 by L. Wolfenstein (Carnegie-Mellon Univer- sity), T violation in the weak interactions, it appeared that the product CP was a good symmetry. In 1964 CP violation was observed in K0 decays at a level given by the parameter 2.3 � 10-3. A unified treatment of CP

314

CP VIOLATION IN KL DECAYS Updated April 2012 by L. Wolfenstein (Carnegie-Mellon Uni-  

E-Print Network (OSTI)

­ 1­ CP VIOLATION IN KL DECAYS Updated April 2012 by L. Wolfenstein (Carnegie-Mellon Uni- versity and P violation in the weak interactions, it appeared that the product CP was a good symmetry. In 1964 CP violation was observed in K0 decays at a level given by the parameter 2.3 � 10-3. A unified

315

Study of CP Asymmetry in the Neutral B Meson Decays to Two Charged Pions  

E-Print Network (OSTI)

Study of CP Asymmetry in the Neutral B Meson Decays to Two Charged Pions Nakadaira Takeshi1 December 2002 1 nakadair@hep.phys.s.u-tokyo.ac.jp #12;Abstract We present the measurement of CP + - CP eigenstate and identify the flavor of the accompanying B meson from its decay products. From

Aihara, Hiroaki

316

Search for the Standard Model Higgs boson decaying to two W bosons at CMS  

E-Print Network (OSTI)

In this thesis, we search for the production of the Standard Model Higgs boson at the Large Hadron Collider, through its decay mode to two W bosons, which each in turn decay into a charged lepton and a neutrino. The Higgs ...

Xie, Si, Ph. D. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

317

CDF/PUB/EXOTIC/PUBLIC/10737 Search for a Standard Model Higgs Boson Decaying Into Photons  

E-Print Network (OSTI)

CDF/PUB/EXOTIC/PUBLIC/10737 Search for a Standard Model Higgs Boson Decaying Into Photons at CDF) A search for the SM Higgs boson in the diphoton decay channel is reported using data corre- sponding are set on the production cross section times the H branching fraction for hypothetical Higgs boson

Fermilab

318

Searches for supersymmetric particles produced in Z-boson decay  

Science Journals Connector (OSTI)

We have searched for supersymmetric particles in 528 Z decays with the Mark II detector at the SLAC Linear Collider. We place 95%-confidence-level lower mass limits on degenerate squarks, nondegenerate up-type squarks, nondegenerate down-type squarks, charginos, pair-produced unstable neutralinos, and neutralinos from associated production.

T. Barklow et al.

1990-06-18T23:59:59.000Z

319

Validation and Testing of ENDF/B-VII Decay Data  

SciTech Connect

The nuclear decay library developed for the ORIGEN code was upgraded from ENDF/B-VI.8 to -VII.0 and released in the SCALE nuclear modeling and simulation code system in 2011. Experience with the ENDF/B-VII.0 library identified serious errors and performance issues in the evaluated decay sublibrary. Initially, errors were identified in the decay scheme for the 238U series, leading to large discrepancies in the gamma emission rate for uranium. Further testing of the fission product decay data revealed significant performance issues with ENDF/B-VII.0 relative to the previous release of ENDF/B-VI. To address the performance issues, the decay data library in SCALE was upgraded to ENDF/B-VII.1 and released as an update for users in 2013. This paper describes the practical impact of the ENDF/B-VII.0 decay data performance issues on common code applications, and the validation and testing performed on the updated ORIGEN libraries developed from the ENDF/B-VII.1 sublibrary.

Gauld, Ian C [ORNL] [ORNL; Pigni, Marco T [ORNL] [ORNL; Ilas, Germina [ORNL] [ORNL

2014-01-01T23:59:59.000Z

320

Top Quark Properties from Top Pair Events and Decays  

SciTech Connect

Over a decade since the discovery of the top quark we are still trying to unravel mysteries of the heaviest observed particle and learn more about its nature. The continuously accumulating statistics of CDF and DO data provide the means for measuring top quark properties with ever greater precision and the opportunity to search for signs of new physics that could be manifested through subtle deviations from the standard model in the production and decays of top quarks. In the following we present a slice of the rich program in top quark physics at the Fermilab Tevatron: measurements of the properties of top quark decays and searches for unusual phenomena in events with pair produced tops. In particular, we discuss the most recent and precise CDF and DO measurements of the transverse polarization of W bosons from top decays, branching ratios and searches for flavor-changing neutral current decays, decays into charged Higgs and invisible decays. These analyses correspond to integrated luminosities ranging from 0.9 to 2.7 fb{sup -1}.

Ivanov, A.; /UC, Davis

2008-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Vus and neutron beta decay  

E-Print Network (OSTI)

We discuss the effect of the recent change of $V_{\\rm us}$ by three standard deviations on the standard model predictions for neutron beta decay observables. We also discuss the effect the experimental error bars of $V_{\\rm us}$ have on such predictions. Refined precision tests of the standard model will be made by a combined effort to improve measurements in neutron beta decay and in strangeness-changing decays. By itself the former will yield very precise measurements of $V_{\\rm ud}$ and make also very precise predictions for $V_{\\rm us}$.

A. Garcia; G. Sanchez-Colon

2010-06-28T23:59:59.000Z

322

Identification techniques for highly boosted W bosons that decay into hadrons  

E-Print Network (OSTI)

In searches for new physics in the energy regime of the LHC, it is becoming increasingly important to distinguish single-jet objects that originate from the merging of the decay products of W bosons produced with high ...

Apyan, Aram

323

Analysis of an esoteric interpretation of a threshold in beta decay  

Science Journals Connector (OSTI)

A threshold associated with a small mixing of a heavy neutrino in beta decay cannot be interpreted as due to the production of a fictitious neutral scalar in conjunction with a light neutrino.

G. Karl; V. Novikov; J. J. Simpson

1992-11-01T23:59:59.000Z

324

Follow-up study of indoor radon in Greek buildings  

Science Journals Connector (OSTI)

......brick). The main heating sources are oil products, natural gas and electricity. However, due to the economical situation...number 9 in Figure-1) which includes Athens, the capital of Greece. Attica is the most populated region of Greece......

A. Clouvas; S. Xanthos; M. Kolovou; C. Potiriadis; G. Takoudis; J. Guilhot

2013-12-01T23:59:59.000Z

325

Computer code for double beta decay QRPA based calculations  

E-Print Network (OSTI)

. The Enriched Xenon Observatory for neutrinoless double beta decay (EXO) will search for the rare decays

Bertulani, Carlos A. - Department of Physics and Astronomy, Texas A&M University

326

Measurement of natural radioactivity and radon exhalation rate in fly ash samples from a thermal power plant and estimation of radiation doses  

Science Journals Connector (OSTI)

Fly ash produced by coal-burning in thermal power station has become a subject of world wide interest in recent years because of its diverse uses in construction activities and considerable economic and environmental importance. Fly ash is used in the production of bricks, sheets, cement and also in land filling etc. Indian coals used in thermal power plants are found to have high ash contents, resulting in the production of large amount of fly ash. Coal contains radionuclides including uranium (the source of inert gas radon), Th and K. Thus coal combustion results in enhanced concentration of natural radionuclides 226Ra, 232Th and 40K. Since these radionuclides concentration in fly ash plays an important role in health physics it is important to measure radionuclides concentration in fly ash. In the present work enhanced radioactivity and radon exhalation rate from fly ash samples collected from a thermal power plant of NTPC (National Thermal Power Corporation), Dadri (U.P.) India, have been measured. A high resolution gamma ray spectroscopic system has been used for the measurement of natural radioactivity (226Ra, 232Th and 40K). Gamma spectrometric measurements were carried out at Inter-University Accelerator Centre, New Delhi using a coaxial n-type \\{HPGe\\} detector (EG&G, ORTEC, Oak Ridge, USA). Activity concentration of 226Ra varies from 81.8 ± 2.2 to 177.3 ± 10.0 Bq kg?1 with an average value of 118.6 ± 7.4 Bq kg?1 and of 232Th from 111.6 ± 3.2 to 178.5 ± 3.9 Bq kg?1 with an average value of 147.0 ± 3.4 Bq kg?1. 40K activity was found to be below detection limit in some samples while other samples have shown potassium activity to vary from 365.9 ± 4.8 to 495.9 ± 6.2 Bq kg?1 with an average value of 352.0 ± 4.5 Bq kg?1. Surface radon exhalation rates (EA) and Mass exhalation rates (EM) in these samples were measured by “Sealed can technique” using LR-115 type II track detectors. EA is found to vary from 80.1 ± 9.3 to 242.7 ± 16.3 mBq m?2 h?1 with an average value 155.5 ± 12.8 mBq m?2 h?1, while EM varies from 3.1 ± 0.4 to 9.3 ± 0.6 mBq kg?1 h?1 with an average value of 6.0 ± 0.5 mBq kg?1 h?1. Radium equivalent activity (Raeq), related to the external gamma dose and internal dose due to radon and its daughters range from 283.2 to 422.4 Bq kg?1 with an average value of 353.9 Bq kg?1. The calculated values of external hazard index (Hex) vary from 0.77 to 1.87 with an average value of 1.03. Most of the samples show the value of Raeq close to the allowed upper limit of 370 Bq kg?1 and Hex close to unity respectively except in two samples. Annual effective dose varies from 0.15 to 0.23 mSv y?1 with an average value 0.19 mSv y?1.

Mamta Gupta; Ajay Kumar Mahur; Rati Varshney; R.G. Sonkawade; K.D. Verma; Rajendra Prasad

2013-01-01T23:59:59.000Z

327

CP violation in sbottom decays  

E-Print Network (OSTI)

We study CP asymmetries in two-body decays of bottom squarks into charginos and tops. These asymmetries probe the SUSY CP phases of the sbottom and the chargino sector in the Minimal Supersymmetric Standard Model. We identify the MSSM parameter space where the CP asymmetries are sizeable, and analyze the feasibility of their observation at the LHC. As a result, potentially detectable CP asymmetries in sbottom decays are found, which motivates further detailed experimental studies for probing the SUSY CP phases.

Frank F. Deppisch; Olaf Kittel

2010-03-26T23:59:59.000Z

328

Neutrinoless Double Beta-Decay  

E-Print Network (OSTI)

The neutrinoless double $\\beta$-decay of nuclei is reviewed. We discuss neutrino mixing and 3x3 PMNS neutrino mixing matrix. Basic theory of neutrinoless double $\\beta$-decay is presented in some details. Results of different calculations of nuclear matrix element are discussed. Experimental situation is considered. The Appendix is dedicated to E. Majorana (brief biography and his paper in which the theory of Majorana particles is given)

S. M. Bilenky

2010-01-12T23:59:59.000Z

329

BABAR searches for New Physics in B decays to invisible final states The Standard Model (SM) of particle physics has been proven by numerous experiments over  

E-Print Network (OSTI)

BABAR searches for New Physics in B decays to invisible final states The Standard Model (SM for invisible decays of neutral B mesons, where unobservable particles are created in the final state, either exclusively or accompanied by a single photon. The invisible decay products are neutral particles

Wechsler, Risa H.

330

IMPORTANCE OF NEUTRINOLESS DOUBLE BETA DECAY Abstract  

E-Print Network (OSTI)

number violation in nature and what is its magnitude. The neutrinoless double beta decay experiment can

U. Sarkar; Utpal Sarkar

331

NIDC: Online Catalog of Isotope Products | Product Search  

NLE Websites -- All DOE Office Websites (Extended Search)

Product Search Product Search Step 1 - Enter your search criteria below. Element Name Actinium Aluminum Americium Antimony Argon Arsenic Astatine Barium Berkelium Beryllium Bismuth Bohrium Boron Bromine Cadmium Caesium Calcium Californium Carbon Cerium Chlorine Chromium Cobalt Copernicium Copper Curium Darmstadtium Dubnium Dysprosium Einsteinium Erbium Europium Fermium Fluorine Francium Gadolinium Gallium Germanium Gold Hafnium Hassium Helium Holmium Hydrogen Indium Iodine Iridium Iron Krypton Lanthanum Lawrencium Lead Lithium Lutetium Magnesium Manganese Meitnerium Mendelevium Mercury Molybdenum Neodymium Neon Neptunium Nickel Niobium Nitrogen Nobelium Osmium Oxygen Palladium Phosphorus Platinum Plutonium Polonium Potassium Praseodymium Promethium Protactinium Radium Radon Rhenium Rhodium Roentgenium Rubidium Ruthenium Rutherfordium Samarium Scandium Seaborgium Selenium Silicon Silver Sodium Strontium Sulfur Tantalum Technetium Tellurium Terbium Thallium Thorium Thulium Tin Titanium Tungsten Ununhexium Ununoctium Ununpentium Ununquadium Ununseptium Ununtrium Uranium Vanadium Xenon Ytterbium Yttrium Zinc Zirconium

332

Method for the preparation of radon-211. [Patent application  

DOE Patents (OSTI)

A method is claimed for the production of /sup 211/Rn which can be easily isolated from the target and obtained in high yields. It is claimed that the radioisotope /sup 211/Rn can be prepared by the bombardment of /sup 209/Bi with /sup 7/Li particles using the nuclear reaction /sup 209/Bi(/sup 7/Li,5n)/sup 211/Rn. The /sup 211/Rn can be isolated from the target quite easily by degassing at elevated temperatures and the radiochemical purity of the product is better than 98%. It can thus be used as a generator system for /sup 211/At which is of potential interest in biomedical applications. The excitation function for this reaction is about from 40 to 60 MeV and the cross section for /sup 211/Rn production reaches 650 mb at 53 MeV producing a saturation yield of 5.5 ..mu..Ci/nA.

Meyer, G.J.; Lambrecht, R.M.

1980-10-10T23:59:59.000Z

333

In-vivo measurements of Pb-210 to determine cumulative exposure to radon daughters: A pilot study. Final report, 1 March, 1990--May 31, 1991  

SciTech Connect

The objective of this study is to demonstrate the feasibility of estimating cumulative exposure of individuals to low concentrations of radon by measuring the amount of Pb-A-10 in their skeletons. This report presents progress to date establishing the validity of an vivo technique to measure skeletal burdens of Pb-210, accumulated from exposure to radon and radon progeny. With the skeletal content of Pb--210 and a model for Pb metabolism, cumulative exposure to radon and its short-lived daughters (radon/daughters) may be calculated for use in deriving a dose-response relationship between lung cancer and exposure to radon/daughters. Data are presented for 29 subjects exposed to ``above-average`` radon concentrations in their homes, showing the correlation between measured Pb--210 burdens, and measured pCi/l and WLM exposure estimates. Their results are compared to measurements of a population of 24 subject`s presumed exposed to average concentrations. Measurements of a Pennsylvania family exposed for a year in a home with an extremely high radon content are also presented. Update of results of an ongoing study of the biological half-time of Pb--210 in man involving measurements, of a retired radiation worker with a 40 year old skeletal burden of Pb-210.

Laurer, G.R.; Cohen, N. [New York Univ. Medical Center, Tuxedo, NY (United States). Dept. of Environmental Medicine; Stark, A.; Ju, C. [New York State Dept. of Health, Albany, NY (United States). Bureau of Environmental and Occupational Epidemiology

1991-05-01T23:59:59.000Z

334

TRANSFER PRODUCTS FROM THE REACTIONS OF HEAVY IONS  

E-Print Network (OSTI)

The Radiochemistry of Americium and Curium, Subcommittee onthe feasibility of new americium isotope production.arising from the decay of americium isotopes, so extreme

Thomas III, K.E.

2010-01-01T23:59:59.000Z

335

Experimental charmonium decay results from BES  

E-Print Network (OSTI)

Based on 14 million psi(2S) and 58 million J/psi events collected by the BESII detector, the leptonic decay of psi(2S) into $\\tau^+\\tau^-$, psi(2S) multi-body decays, chi_cJ decays, and J/psi hadronic decays are studied, and the branching fractions of these decays are reported. These results may shed light on the understanding of QCD.

Ping Rong-Gang; F. A. Harris; for BES collaboration

2007-11-23T23:59:59.000Z

336

Design of a wall-less proportional counter for microdosimetry in nanometer dimensions  

E-Print Network (OSTI)

this study. It is interesting that radon and its decay products, primarily ? emitters, contribute 55% of the background effective dose, averaged over the United States. Radon is common in indoor air and uranium miners who were exposed to high levels... of radon daughters have developed lung cancers. When talking about the interactions of radiations at the microdosimetric level, our quantitative description of interactions shifts from conventional average quantities, like absorbed dose and LET...

Rayadurgam, Sripriya

2006-08-16T23:59:59.000Z

337

Evidence for the decay X(3872) -> J/\\psi\\omega  

SciTech Connect

We present a study of the decays B{sup 0,+} --> J/{psi}{pi}{sup +}{pi}{sup -}{pi}{sup 0}K{sup 0,+}, using 467x10{sup 6} B{anti B} pairs recorded with the BABAR detector. We present evidence for the decay mode X(3872) --> J/{psi}{omega}, with product branching fractions B(B{sup +} --> X(3872)K{sup +}) x B(X(3872) --> J/{psi}{omega}) = [0.6 {+-} 0.2(stat) {+-} 0.1(syst)] x 10{sup -5}, and B(B{sup 0} --> X(3872)K{sup 0}) x B(X(3872) --> J/{psi}{omega}) = [0.6 {+-} 0.3(stat) {+-} 0.1(syst)] x 10{sup -5}. A detailed study of the {pi}{sup +}{pi}{sup -}{pi}{sup 0} mass distribution from X(3872) decay favors a negative-parity assignment.

del Amo Sanchez, P.; Lees, J.P.; Poireau, V.; Prencipe, E.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Martinelli, M.; Palano, A.; Pappagallo, M.; /INFN, Bari /Bari U.; Eigen, G.; Stugu, B.; Sun, L.; /Bergen U.; Battaglia, M.; Brown, D.N.; Hooberman, B.; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G.; Osipenkov, I.L.; Tanabe, T.; /UC, Berkeley /Birmingham U. /Ruhr U., Bochum /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UC, Riverside /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. /Dortmund U. /Dresden, Tech. U. /Ecole Polytechnique /Edinburgh U. /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /INFN, Ferrara /Frascati /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /Indian Inst. Tech., Guwahati /Harvard U. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa State U. /Iowa State U. /Johns Hopkins U. /Paris U., VI-VII /LLNL, Livermore /Liverpool U. /Queen Mary, U. of London /Royal Holloway, U. of London /Royal Holloway, U. of London /Louisville U. /Mainz U., Inst. Kernphys. /Manchester U. /Maryland U. /Massachusetts U., Amherst /MIT /McGill U. /INFN, Milan /Milan U. /INFN, Milan /INFN, Milan /Milan U. /Mississippi U. /Montreal U. /INFN, Naples /Naples U. /NIKHEF, Amsterdam /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /INFN, Padua /Padua U. /INFN, Padua /INFN, Padua /Padua U. /Paris U., VI-VII /INFN, Perugia /Perugia U. /INFN, Pisa /Pisa U. /INFN, Pisa /Pisa, Scuola Normale Superiore /INFN, Pisa /Pisa U. /INFN, Pisa /Princeton U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /Rostock U. /Rutherford /DAPNIA, Saclay /SLAC /South Carolina U. /Southern Methodist U. /Stanford U., Phys. Dept. /SUNY, Albany /Tel Aviv U. /Tennessee U. /Texas U. /Texas U., Dallas /INFN, Turin /Turin U. /INFN, Trieste /Trieste U. /Valencia U. /Victoria U. /Warwick U. /Wisconsin U., Madison

2011-08-11T23:59:59.000Z

338

Radon concentrations in three underground lignite mines in Turkey  

Science Journals Connector (OSTI)

......being operated by the Aegean Lignite Enterprise (Ege Linyitleri...determined in three underground lignite mines, namely Tuncbilek...which is the main state body of lignite coal production, processing...of TKi. GLi Tuncbilek coal reserve, which is located on the mid-west......

S. Çile; N. Altinsoy; N. Çelebi

2010-01-01T23:59:59.000Z

339

Topic 20: t Procedures November 29, 2011  

E-Print Network (OSTI)

, tasteless noble gas, occurring naturally as the decay product of uranium. It is one of the densest radiation and is the most variable from location to location. Radon gas from natural sources can accumulate

Watkins, Joseph C.

340

t Procedures A curve has been found representing the frequency distribution of values of the means of such samples,  

E-Print Network (OSTI)

gas, occurring naturally as the decay product of uranium. It is one of the densest substances to ionizing radiation and is the most variable from location to location. Radon gas from natural sources can

Watkins, Joseph C.

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Regulation of cytochrome P450 3A4 gene expression through modulating pregnane X receptor transcriptional activity by NF-? aryl hydrocarbon receptor and xenobiotics  

E-Print Network (OSTI)

), Uranium (U), Vanadium (V) Industrial chemicals include environmental pollutants and waste chemicals such as PBBs, PCBs, dioxins and furans, estrogens in the environment, pulp mill effluents, heavy metals, Radon and Radon decay products, Asbestos....6 Immunocytochemistry?????????.????????.??.... 66 2.7 Reporter gene assay???????????????????.??. 66 2.8 Western blot analysis???????????.???????.??.. 66 2.9 GST pull-down???????????????????????. 67 2.10 Co...

Gu, Xinsheng

2009-05-15T23:59:59.000Z

342

Cancer link to power cables exaggerated, say critics  

Science Journals Connector (OSTI)

... denies that it has shown any such link. In their paper, "Enhanced deposition of radon daughter nuclei in the vicinity of power frequency magnetic fields", Denis Henshaw and colleagues ... colleagues speculate about a possible link between certain types of cancers and the inhalation of radon decay products that are influenced by electric fields. But they

Ehsan Masood

1996-02-15T23:59:59.000Z

343

Hazards below Ground  

Science Journals Connector (OSTI)

... of lung cancer among uranium miners is continued exposure to the radioactive decay products of radon-22. These are polonium-218, lead-214, bismuth-214 and polonium-214. It ... lead-214, bismuth-214 and polonium-214. It is known that some of the radon daughters contained in the air breathed by miners are retained in the respiratory system. ...

1967-10-14T23:59:59.000Z

344

The ENVIRAD project: a way to control and to teach how to protect from high indoor radon level  

Science Journals Connector (OSTI)

The environmental radioactivity (ENVIRAD) project involves students of Italian secondary schools with the aim to make them acquainted with the radon measurement techniques. The first step of the project has consisted of the introduction of the participants into some themes not treated in usual curricula to supply the student with the cultural skill to carry out survey about radon concentrations in the school and eventually in other buildings. The second ENVIRAD's part is the creation of a network for the continuous on-line measurements of radon exhalation from soil for geophysical applications. The feasibility of the project has been verified by 1-year work with a pilot school during the season 2002/2003. In the following year, 18 schools will join the project.

A.M. Esposito; M. Ambrosio; E. Balzano; L. Gialanella; M. Pugliese; V. Roca; M. Romano; C. Sabbarese; G. Venoso

2005-01-01T23:59:59.000Z

345

Rare exclusive hadronic W decays in a t-tbar environment  

E-Print Network (OSTI)

The large cross section for t-tbar production at the LHC and at any future hadron collider provides a high-statistics and relatively clean environment for a study of W boson properties: after tagging on a leptonic decay of one of the Ws and the two b-jets, an additional W still remains in the event. We study the prospect of making the first exclusive hadronic decay of a fundamental boson of the standard model, using the decay modes W to pi gamma and W to pi pi pi, and other related decays. By using strong isolation criteria, which we impose by searching for jets with a single particle constituent, we show that the three particle hadronic W decays have potential to be measured at the LHC. The possibility of measuring an involved spectrum of decay products could considerably expand our knowledge of how the W decays, and experimental techniques acquired in making these measurements would be useful for application to future measurements of exclusive hadronic Higgs boson decays.

Michelangelo Mangano; Tom Melia

2014-10-28T23:59:59.000Z

346

Rare exclusive hadronic W decays in a t-tbar environment  

E-Print Network (OSTI)

The large cross section for t-tbar production at the LHC and at any future hadron collider provides a high-statistics and relatively clean environment for a study of W boson properties: after tagging on a leptonic decay of one of the Ws and the two b-jets, an additional W still remains in the event. We study the prospect of making the first exclusive hadronic decay of a fundamental boson of the standard model, using the decay modes W to pi gamma and W to pi pi pi, and other related decays. By using strong isolation criteria, which we impose by searching for jets with a single particle constituent, we show that the three particle hadronic W decays have potential to be measured at the LHC. The possibility of measuring an involved spectrum of decay products could considerably expand our knowledge of how the W decays, and experimental techniques acquired in making these measurements would be useful for application to future measurements of exclusive hadronic Higgs boson decays.

Mangano, Michelangelo

2014-01-01T23:59:59.000Z

347

Hadronically decaying color-adjoint scalars at the LHC  

E-Print Network (OSTI)

We study the phenomenology of the pair-production of scalar color-octet electroweak singlet states at the LHC. Such states appear in many extensions of the Standard Model. They can be pair-produced copiously at the LHC and will signal themselves as resonances in multijet final states. Beyond the QCD pair-production process we consider a vectorlike confinement scenario with an additional color-octet vector state. These vector particles can be produced in the s-channel and through their decay contribute to the scalar pair production. We point out the differences between the two hypotheses and device a strategy to distinguish them.

Steffen Schumann; Adrien Renaud; Dirk Zerwas

2011-08-15T23:59:59.000Z

348

Thermodynamics of decaying vacuum cosmologies  

Science Journals Connector (OSTI)

The thermodynamic behavior of decaying vacuum cosmologies is investigated within a manifestly covariant formulation. Such a process corresponds to a continuous, irreversible energy flow from the vacuum component to the created matter constituents. It is shown that if the specific entropy per particle remains constant during the process, the equilibrium relations are preserved. In particular, if the vacuum decays into photons, the energy density ? and average number density of photons n scale with the temperature as ??T4 and n?T3. The temperature law is determined and a generalized Planckian-type form of the spectrum, which is preserved in the course of the evolution, is also proposed. Some consequences of these results for decaying vacuum FRW-type cosmologies as well as for models with "adiabatic" photon creation are discussed.

J. A. S. Lima

1996-08-15T23:59:59.000Z

349

Time dependent particle emission from fission products  

SciTech Connect

Decay heating following nuclear fission is an important factor in the design of nuclear facilities; impacting a variety of aspects ranging from cooling requirements to shielding design. Calculations of decay heat, often assumed to be a simple product of activity and average decay product energy, are complicated by the so called 'pandemonium effect'. Elucidated in the 1970's this complication arises from beta-decays feeding high-energy nuclear levels; redistributing the available energy between betas and gammas. Increased interest in improving the theoretical predictions of decay probabilities has been, in part, motivated by the recent experimental effort utilizing the Total Absorption Gamma-ray Spectrometer (TAGS) to determine individual beta-decay transition probabilities to individual nuclear levels. Accurate predictions of decay heating require a detailed understanding of these transition probabilities, accurate representation of particle decays as well as reliable predictions of temporal inventories from fissioning systems. We will discuss a recent LANL effort to provide a time dependent study of particle emission from fission products through a combination of Quasiparticle Random Phase Approximation (QRPA) predictions of beta-decay probabilities, statistical Hauser-Feshbach techniques to obtain particle and gamma-ray emissions in statistical Hauser-Feshbach and the nuclear inventory code, CINDER.

Holloway, Shannon T [Los Alamos National Laboratory; Kawano, Toshihiko [Los Alamos National Laboratory; Moller, Peter [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

350

Current Algebras and Meson Decays  

Science Journals Connector (OSTI)

By using quark-algebra equal-time commutation relations and a smooth pole-dominated form for the vector-vector-axial-vector vertex in the high-energy limit, one can describe the radiative decays of the vector mesons and the ??3? decay in excellent agreement with experimental data. It is shown, however, that if we exploit all equations this procedure gives, we get into contradictions. By introducing a non-smooth amplitude, the contradictions can be eliminated in such a way that the good predictions of the smooth case remain unaltered. The various aspects of the results are discussed.

Tibor Nagy

1970-04-01T23:59:59.000Z

351

Interference Effects in Leptonic Decays  

Science Journals Connector (OSTI)

It is proven that in any leptonic decay experiment in which the lepton masses and charges may be neglected, and in which no pseudoscalar correlations are measured, all V·A interference terms will be antisymmetric under exchange of the two leptons, while the pure V and A terms will be symmetric. If the experiment measures a pseudoscalar correlation, these conclusions are reversed. Even if the lepton masses cannot be ignored (e.g., for ?0??-+?¯+p, or low-energy ? decay) it is still true that no V·A interference may appear when scalars are measured, and only V·A interference may contribute when pseudoscalars are measured, providing that the lepton spins and momenta are not directly observed. Thus experiments can be devised that involve no interference effects, or only interference effects. This theorem holds independently of the strangeness change, spin change, energy transfer, or of any particular assumptions about the form of the V and A currents. It proves most useful when it is difficult or tedious to calculate transition rates directly. Applications are discussed, including possible tests of the Feynman-Gell-Mann theory in nonunique forbidden ? decay, of the nature of the leptonic ?0 and K0 decay interaction, and of the charge symmetry properties of weak interactions.

Steven Weinberg

1959-07-15T23:59:59.000Z

352

?-Meson Decay into Three Electrons  

Science Journals Connector (OSTI)

The decay ?-?e-+e-+e+ via internal conversion is computed using a phenomenological matrix element for the ?e? interaction. The result is compared with present experimental limits for this process and the results concerning the form factors in the matrix element are discussed. The energy distribution of the emitted electrons is also computed.

M. Bander and G. Feinberg

1960-08-15T23:59:59.000Z

353

Beta decay of Ga-62  

E-Print Network (OSTI)

We report a study of the beta decay of Ga-62, whose dominant branch is a superallowed 0(+)-->0(+) transition to the ground state of Zn-62. We find the total half-life to be 115.84+/-0.25 ms. This is the first time that the Ga-62 half-life has been...

Hyman, BC; Iacob, VE; Azhari, A.; Gagliardi, Carl A.; Hardy, John C.; Mayes, VE; Neilson, RG; Sanchez-Vega, M.; Tang, X.; Trache, L.; Tribble, Robert E.

2003-01-01T23:59:59.000Z

354

Search for an Invisibly-Decaying Higgs Boson at LEP  

E-Print Network (OSTI)

A search for a Higgs boson produced in e^+e^- collisions in association with a Z boson and decaying into invisible particles is performed. Data collected at LEP with the L3 detector at centre-of-mass energies from 189 GeV to 209 GeV are used, corresponding to an integrated luminosity of 0.63/fb. Events with hadrons, electrons or muons with visible masses compatible with a Z boson and missing energy and momentum are selected. They are consistent with the Standard Model expectations. A lower limit of 112.3 GeV is set at 95% confidence level on the mass of the invisibly-decaying Higgs boson in the hypothesis that its production cross section equals that of the Standard Model Higgs boson. Relaxing this hypothesis, upper limits on the production cross section are derived.

L3 Collaboration

2005-01-13T23:59:59.000Z

355

Bragg scattering measurement of atmospheric plasma decay  

Science Journals Connector (OSTI)

The decay processes of the plasma layers generated by two intersecting microwave pulses in 1 torr dry air are investigated by Bragg scattering method. The results of measurement show that the electrons decay i...

Y. S. Zhang; S. P. Kuo

1991-04-01T23:59:59.000Z

356

Causes and Control of Wood Decay,  

E-Print Network (OSTI)

1 Causes and Control of Wood Decay, Degradation & Stain #12;2 Contents Moisture .................................................................................3 Wood Degradation: Causes and Control..............................4 Weathering......................................................................................................4 Naturally Decay-resistant Species...........................................................5 Wood

357

Searches for a heavy Higgs boson decaying into WW, ZZ in final states with hadronic jets and neutrinos  

Science Journals Connector (OSTI)

The H ? ZZ ? 2?2q decay mode has the largest branching fraction among all H?ZZ modes considered at CMS, about 20 times larger than that of the fully leptonic final state, and since all four decay products are ...

Giovanni Petrucciani

2013-01-01T23:59:59.000Z

358

NEUTRINOLESS DOUBLE BETA DECAY AND ITS “INVERSE”  

E-Print Network (OSTI)

subsequently published arguments, non-observation of neutrinoless double beta decay has, to date, no bearing on

Clemens A. Heusch; Peter Minkowski

1996-01-01T23:59:59.000Z

359

Neutrinoless Double Beta Decay and CP Violation  

E-Print Network (OSTI)

neutrinoless double beta decay in the case of two neutrino generations (or when the third generation leptons do

Patrick J. O’donnell; Utpal Sarkar

1993-01-01T23:59:59.000Z

360

Decays of near BPS heterotic strings  

Science Journals Connector (OSTI)

The decay of highly excited massive string states in compactified heterotic string theories is discussed. We calculate the decay rate and spectrum of states carrying momentum and winding in the compactified direction. The longest lived states in the spectrum are near Bogomol’nyi-Prasad-Sommerfield (BPS) states whose decay is dominated by a single decay channel of massless radiation which brings the state closer to being BPS.

Michael Gutperle and Darya Krym

2006-10-20T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Imperfect World of $??$-decay Nuclear Data Sets  

E-Print Network (OSTI)

The precision of double-beta ($\\beta\\beta$) decay experimental half lives and their uncertainties is reanalyzed. The method of Benford's distributions has been applied to nuclear reaction, structure and decay data sets. First-digit distribution trend for $\\beta\\beta$-decay T$_{1/2}^{2\

B. Pritychenko

2015-01-09T23:59:59.000Z

362

Double beta decay: experiments and theory review  

E-Print Network (OSTI)

Neutrinoless double beta decay is one of the most powerful tools to set the neutrino mass absolute scale and establish whether the neutrino is a Majorana particle. After a summary of the neutrinoless double beta decay phenomenology, the present status of the experimental search for this rare decay is reported and the prospects for next generation experiments are reviewed.

A. Nucciotti

2007-07-15T23:59:59.000Z

363

A First Look at Tree Decay An Introduction to How Injury and Decay Affect Trees  

E-Print Network (OSTI)

A First Look at Tree Decay An Introduction to How Injury and Decay Affect Trees by Kevin T. Smith Look at Tree Decay Photosynthesis and decay are the two most essential processes in nature. Photosynthesis by green plants captures and stores energy from the sun. This energy is used to form wood

364

Radon monitoring in groundwater samples from some areas of northern Rajasthan, India, using a RAD7 detector  

Science Journals Connector (OSTI)

......and groundwater. Natural water contains dissolved...rocks(1). Radon gas and its radioactive...water samples from Cyprus and Greece in the...16.29.3 (8) Cyprus 0.3-20 5.9...water in Greece and Cyprus: implications to...water from various natural sources using nuclear......

Asha Rani; Rohit Mehra; Vikas Duggal

2013-03-01T23:59:59.000Z

365

The Dispersion of Radon Above Deeply Buried Uranium Ore: Millennium Deposit, Athabasca Basin, SK , K Hattori1  

E-Print Network (OSTI)

The Dispersion of Radon Above Deeply Buried Uranium Ore: Millennium Deposit, Athabasca Basin, SK M, Ottawa, ON, 2 Cameco Corporation, Saskatoon, SK Depth Profiles Canada Mining Innovation Council Natural., Portella, P., Olson, R.A., 2007. Unconformity- associated uranium deposits of the Athabasca Basin

366

A pilot study of the dependence of radon concentration on the tectonic structures, using simple geophysical methods  

Science Journals Connector (OSTI)

......concentration of 40K and uranium is more or less stable. The low radon and uranium concentrations measured...supported by the research plan MSM6840770040 of...McMurry P. H. A review of atmospheric aerosol...Plastino W. , et al. Uranium groundwater anomalies...main unit with standard accessories, multi-electrode......

L. Thinova; A. Fronka; K. Rovenska

2011-05-01T23:59:59.000Z

367

Residential Radon Exposure, Histologic Types, and Lung Cancer Risk. A Case–Control Study in Galicia, Spain  

Science Journals Connector (OSTI)

...a federal action plan for saving lives...Radon_Action_Plan.pdf . 6. A citizen's...exposure? A systematic review.Int J Radiat Biol...and American Indian uranium miners: an update...carcinoma in German uranium miners.Cancer 2006...was measured using standard procedures. Results...

Juan Miguel Barros-Dios; Alberto Ruano-Ravina; Mónica Pérez-Ríos; Margarita Castro-Bernárdez; Jose Abal-Arca; and Marta Tojo-Castro

2012-06-01T23:59:59.000Z

368

Residential Radon Exposure, Histologic Types, and Lung Cancer Risk. A Case–Control Study in Galicia, Spain  

Science Journals Connector (OSTI)

...in miners (WISMUT Mining Company) have revealed...Perez-Rios Writing, review, and/or revision...a federal action plan for saving lives...Radon_Action_Plan.pdf . 6. A citizen's...exposure? A systematic review.Int J Radiat Biol...was measured using standard procedures. Results...

Juan Miguel Barros-Dios; Alberto Ruano-Ravina; Mónica Pérez-Ríos; Margarita Castro-Bernárdez; Jose Abal-Arca; and Marta Tojo-Castro

2012-06-01T23:59:59.000Z

369

Estimation of mean annual effective dose through radon concentration in the water and indoor air of Islamabad and Murree  

Science Journals Connector (OSTI)

......strength to the energy of alpha particle...particles of different energies. Different isotopes...different alpha energies and produce different...about 30 min, the average radon content is...estimate of water consumption (60 la1), respectively...having ventilated homes structure, though......

N. Ali; E. U. Khan; P. Akhter; F. Khan; A. Waheed

2010-09-01T23:59:59.000Z

370

Radon (Rn-222) and thoron (Rn-220) emanation fractions from three separate formations of oil field pipe scale  

E-Print Network (OSTI)

because of the external radiation exposure but also because of the radon gas emissions, both of which are due to the radioactive minerals contained in the scale. It was believed that the structure of the scale is formed tightly enough to prevent much...

Fruchtnicht, Erich Harold

2004-11-15T23:59:59.000Z

371

Radon concentration in drinking water and supplementary exposure in Bia-tei mining area, Bihor county (Romania)  

Science Journals Connector (OSTI)

......partially of the Sectoral Operational Programme-Increase of Economic Competitiveness co-financed by the European Regional Development...Heloisa F. Radon (222Rn) concentration in indoor air near the coal mining area of Nui Beo, North of Vietnam. J. Environ. Radioact......

Mircea Moldovan; Dan Constantin Nita; Alexandra Cucos-Dinu; Tiberius Dicu; Nicoleta Bican-Brisan; Constantin Cosma

2014-03-01T23:59:59.000Z

372

Amplitudes for the analysis of the decay $J/?\\to K^{+} K^{-} ?^0$  

E-Print Network (OSTI)

We construct an analytical model for two channel, two-body scattering amplitudes, and then apply it in the description of the three-body $J/\\psi \\to K^+K^-\\pi^0$ decay. In the construction of the partial wave amplitudes, we combine the low energy resonance region with the Regge asymptotic behavior determined from direct two-body production. We find that resonance production in the $K\\pi$ channel in $J/\\psi$ decays seems to differ from that observed in direct $K\\pi$ production, while the mass distribution in the $K\\bar K$ channel may be compatible.

Peng Guo; Ryan Mitchell; Matthew Shepherd; Adam P. Szczepaniak

2011-12-14T23:59:59.000Z

373

Electromagnetic corrections to final state interactions in $K\\to 3?$ decays  

E-Print Network (OSTI)

The final state interactions of pions in decays $K^\\pm\\to\\pi^\\pm\\pi^0\\pi^0$ are considered using the methods of quantum mechanics. We show how to incorporate the electromagnetic effects in the amplitudes of these decays and to work out the relevant expressions valid above and below the two charged pions production threshold $M_c=2m$. The electromagnetic corrections are given as evaluated in a potential model.

S. R. Gevorkyan; A. V. Tarasov; O. O. Voskresenskaya

2007-02-03T23:59:59.000Z

374

Searching for Smoking Gun Signatures of Decaying Dark Matter  

E-Print Network (OSTI)

Clear methods to differentiate between decaying and annihilating dark matter (DM) scenarios are still by and large unavailable. In this note, we study the potential astrophysical signatures of a new class of hidden sector decaying DM models, which can address the recent cosmic ray measurements. Such models may produce primary photons and/or neutrinos at large rates, correlated with the leptonic production. The photon and neutrino spectra will then contain sharp features at the TeV scale. We demonstrate the discovery potential for upcoming and future measurements by FERMI, HESS, AGIS and IceCube/DeepCore. We show that these models may be discovered in the near future. Specifically, measurements of diffuse gamma rays by FERMI can detect the start of a hard photon feature. We argue that these hard spectra can be produced by decaying dark matter and be consistent with current constraints, but are difficult to reconcile with models of annihilating DM. Consequently the measurement of a hard spectral feature, in correlation with the current cosmic ray measurements, will strongly favor decaying DM models. Finally we comment on the preliminary results from the Inner Galaxy presented by the FERMI collaboration.

Joshua T. Ruderman; Tomer Volansky

2009-07-27T23:59:59.000Z

375

Results on charmed meson decays from Mark III  

SciTech Connect

We report recent results on charmed meson decays, obtained using the Mark III detector at SPEAR. The first topic discussed is the observation of e/sup +/e/sup -/ ..-->.. D/sub s/D/sub s/* at ..sqrt..s = 4.14 GeV. The D/sub s/* is detected as a peak in the mass distribution recoiling from D/sub s//sup + -/ ..-->.. phi..pi../sup + -/. The mass of the D/sub s/* is found to be (2109.3 +- 2.1 +- 3.1)MeV/c/sup 2/, yielding a D/sub s/*-D/sub s/ mass difference of (137.9 +- 2.1 +- 4.3) MeV/c/sup 2/. The production cross section times branching ratio is also measured. Next, a search for the decay D/sup +/ ..-->.. ..mu../sup +/nu/sub ..mu../ is described. A preliminary upper limit (90% CL) on B(D/sup +/ ..-->.. ..mu../sup +/nu/sub ..mu../) of 8.4 x 10/sup -4/ is obtained, corresponding to an upper limit on the decay constant f/sub D/ of 340 MeV/c/sup 2/. Finally, we present results of a search for the lepton family number violating decay D/sup 0/ ..-->.. ..mu..e. We find B(D/sup 0/ ..-->.. ..mu..e) < 1.5 x 10/sup -4/ at 90% CL.

Wasserbaech, S.R.

1987-04-01T23:59:59.000Z

376

Heavy flavor production in the STAR experiment  

E-Print Network (OSTI)

In this paper, recent STAR heavy flavor measurements in proton-proton and heavy-ion collisions are highlighted. We report studies of open charm mesons, reconstructed directly from hadronic decay products, and studies of electrons from semi-leptonic decays of heavy flavor hadrons. We also present J/$\\psi$ measurements via the di-electron decay channel at various collision systems and energies. In Au+Au collisions the energy dependence of J/$\\psi$ production measured at $\\sqrt{s_{NN}}$ = 39, 62.4 and 200 GeV is shown. Finally, prospects of heavy flavor measurements with the STAR detector upgrades are discussed.

Barbara Trzeciak; for the STAR Collaboration

2014-09-11T23:59:59.000Z

377

Assessment of radon concentration and external gamma radiation level in the environs of Narwapahar uranium mine, India and its radiological significance  

Science Journals Connector (OSTI)

In the environs of uranium mining, milling and processing facilities and in the uranium mineralized terrain, a little higher ambient radon concentration and gamma radiation level may be expected in comparison ...

B. K. Rana; R. M. Tripathi; J. S. Meena…

2011-11-01T23:59:59.000Z

378

Evolution of density perturbations in decaying vacuum cosmology  

SciTech Connect

We study cosmological perturbations in the context of an interacting dark energy model, in which the cosmological term decays linearly with the Hubble parameter, with concomitant matter production. A previous joint analysis of the redshift-distance relation for type Ia supernovas, barionic acoustic oscillations, and the position of the first peak in the anisotropy spectrum of the cosmic microwave background has led to acceptable values for the cosmological parameters. Here we present our analysis of small perturbations, under the assumption that the cosmological term, and therefore the matter production, are strictly homogeneous. Such a homogeneous production tends to dilute the matter contrast, leading to a late-time suppression in the power spectrum. Nevertheless, an excellent agreement with the observational data can be achieved by using a higher matter density as compared to the concordance value previously obtained. This may indicate that our hypothesis of homogeneous matter production must be relaxed by allowing perturbations in the interacting cosmological term.

Borges, H. A.; Pigozzo, C. [Instituto de Fisica, Universidade Federal da Bahia, Salvador, BA (Brazil); Carneiro, S. [Instituto de Fisica, Universidade Federal da Bahia, Salvador, BA (Brazil); International Centre for Theoretical Physics, Trieste (Italy); Fabris, J. C. [Institut d'Astrophysique de Paris, Paris (France)

2008-02-15T23:59:59.000Z

379

Robust Hydraulic Fracture Monitoring (HFM) of Multiple Time Overlapping Events Using a Generalized Discrete Radon Transform  

E-Print Network (OSTI)

In this work we propose a novel algorithm for multiple-event localization for Hydraulic Fracture Monitoring (HFM) through the exploitation of the sparsity of the observed seismic signal when represented in a basis consisting of space time propagators. We provide explicit construction of these propagators using a forward model for wave propagation which depends non-linearly on the problem parameters - the unknown source location and mechanism of fracture, time and extent of event, and the locations of the receivers. Under fairly general assumptions and an appropriate discretization of these parameters we first build an over-complete dictionary of generalized Radon propagators and assume that the data is well represented as a linear superposition of these propagators. Exploiting this structure we propose sparsity penalized algorithms and workflow for super-resolution extraction of time overlapping multiple seismic events from single well data.

Ely, Gregory

2013-01-01T23:59:59.000Z

380

Non-adiabatic perturbations in decaying vacuum cosmology  

SciTech Connect

We investigate a spatially flat Friedmann-Lemaître-Robertson-Walker cosmology in which a decaying vacuum term causes matter production at late times. Assuming a decay proportional to the Hubble rate, the ratio of the background energy densities of dark matter and dark energy changes with the cosmic scale factor as a{sup ?3/2}. The intrinsically non-adiabatic two-component perturbation dynamics of this model is reduced to a single second-order equation. Perturbations of the vacuum term are shown to be negligible on scales that are relevant for structure formation. On larger scales, dark-energy perturbations give a somewhat higher contribution but remain always smaller than the dark-matter perturbations.

Zimdahl, W.; Fabris, J.C. [Departamento de Física, Universidade Federal do Espírito Santo, Vitória, ES (Brazil); Borges, H.A.; Carneiro, S. [Instituto de Física, Universidade Federal da Bahia, Salvador, BA (Brazil); Hipólito-Ricaldi, W.S., E-mail: winfried.zimdahl@pq.cnpq.br, E-mail: humberto@ufba.br, E-mail: saulo.carneiro@pq.cnpq.br, E-mail: fabris@pq.cnpq.br, E-mail: whipolito@gmail.com [Departamento de Ciências Matemáticas e Naturais, UFES, São Mateus, ES (Brazil)

2011-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

ATLAS sensitivity to Wtb anomalous couplings in top quark decays  

E-Print Network (OSTI)

We study the sensitivity of the ATLAS experiment to Wtb anomalous couplings in top pair production with semileptonic decay, pp -> t tbar -> W+ b W- bbar, with one of the W bosons decaying leptonically and the other hadronically. Several observables are examined, including the W helicity fractions and new quantities recently introduced, such as the ratios of helicity fractions and some angular asymmetries defined in the W rest frame. The dependence on anomalous couplings of all these observables has been previously obtained. In this work we show that some of the new observables also have smaller systematic uncertainties than the helicity fractions, with a dependence on anomalous couplings similar or stronger than for helicity fractions. Consequently, their measurement can significantly improve the limits on anomalous couplings. Moreover, the most sensitive measurements can be combined. In this case, the precision achieved in the determination of Wtb anomalous couplings can be of a few percent in the semileptonic channel alone.

J. A. Aguilar-Saavedra; J. Carvalho; N. Castro; A. Onofre; F. Veloso

2007-12-17T23:59:59.000Z

382

Microbial biomass and production associated with decaying leaf ...  

Science Journals Connector (OSTI)

freshwater wetland ecosystem located in Hale County, Ala- bama (325430 N .... evaporated to dryness under a stream of nitrogen gas at. 30C. Ergosterol in ...

2000-06-05T23:59:59.000Z

383

Production and Decay of Mediæval Stained Glass1  

Science Journals Connector (OSTI)

... THE earliest direct evidence as to the methods of mediaeval glass-painting is contained in the treatise of Theophilusv (“Diversarum Artium Schedula”), which ... half of the twelfth century; here one finds detailed instructions for the making of the glass as well as for its formation into the flat sheets or “tables” in which ...

1907-05-02T23:59:59.000Z

384

Z decay confronts nonstandard scenarios  

Science Journals Connector (OSTI)

We show that recent data from the CERN e+e- collider LEP on the Z line shape and decays give stringent new constraints on mixing of e and ? with exotics and Z-Z’ mixing. Even in nonstandard models, where both the visible and the invisible part of the Z width are modified, a fourth light neutrino is unlikely unless substantial mixings between neutrinos and exotics are allowed. If the gluino is detectable at the Fermilab Tevatron then the lighter-chargino mass is tightly constrained (>42 GeV).

Gautam Bhattacharyya; Amitava Raychaudhuri; Amitava Datta; S. N. Ganguli

1990-06-11T23:59:59.000Z

385

Nonspectator contributions to inclusive charmless B decays  

Science Journals Connector (OSTI)

The light quarks inside B mesons are usually treated as spectators and do not affect the decay rates which are assumed to be purely due to b quark decays. In this paper we calculate the nonspectator contributions to inclusive charmless B decays due to the spectator effects. We find that the nonspectator contributions to the branching ratio for B0 are small (<2×10-4), but the contributions to ?S=0 and ?S=-1, B- decay branching ratios can be as large as -7.5×10-4 and 2×10-3, and can modify the main three-body spectator b decay branching ratios by 10% and 20%, respectively. These contributions may play an important role in rare charmless B decays.

Wu-Sheng Dai; Xiao-Gang He; Xue-Qian Li; Gang Zhao

1999-06-22T23:59:59.000Z

386

Charged track multiplicity in B meson decay  

Science Journals Connector (OSTI)

We have used the CLEO II detector to study the multiplicity of charged particles in the decays of B mesons produced at the ?(4S) resonance. Using a sample of 1.5×106 B meson pairs, we find the mean inclusive charged particle multiplicity to be 10.71±0.02-0.15+0.21 for the decay of the pair. This corresponds to a mean multiplicity of 5.36±0.01-0.08+0.11 for a single B meson. Using the same data sample, we have also extracted the mean multiplicities in semileptonic and nonleptonic decays. We measure a mean of 7.82±0.05-0.19+0.21 charged particles per BB¯ decay when both mesons decay semileptonically. When neither B meson decays semileptonically, we measure a mean charged particle multiplicity of 11.62±0.04-0.18+0.24 per BB¯ pair.

G. Brandenburg et al. (CLEO Collaboration)

2000-03-07T23:59:59.000Z

387

Neutrinos from Decaying Muons, Pions, Kaons and Neutrons in Gamma Ray Bursts  

E-Print Network (OSTI)

In the internal shock model of gamma ray bursts ultrahigh energy muons, pions, neutrons and kaons are likely to be produced in the interactions of shock accelerated relativistic protons with low energy photons (KeV-MeV). These particles subsequently decay to high energy neutrinos/antineutrinos and other secondaries. In the high internal magnetic fields of gamma ray bursts, the ultrahigh energy charged particles ($\\mu^+$, $\\pi^+$, $K^+$) lose energy significantly due to synchrotron radiations before decaying into secondary high energy neutrinos and antineutrinos. The relativistic neutrons decay to high energy antineutrinos, protons and electrons. We have calculated the total neutrino flux (neutrino and antineutrino) considering the decay channels of ultrahigh energy muons, pions, neutrons and kaons. We have shown that the total neutrino flux generated in neutron decay can be higher than that produced in $\\mu^+$ and $\\pi^+$ decay. The charged kaons being heavier than pions, lose energy slowly and their secondary total neutrino flux is more than that from muons and pions at very high energy. Our detailed calculations on secondary particle production in $p\\gamma$ interactions give the total neutrino fluxes and their flavour ratios expected on earth. Depending on the values of the parameters (luminosity, Lorentz factor, variability time, spectral indices and break energy in the photon spectrum) of a gamma ray burst the contributions to the total neutrino flux from the decay of different particles (muon, pion, neutron and kaon) may vary and they would also be reflected on the neutrino flavour ratios.

Reetanjali Moharana; Nayantara Gupta

2012-05-27T23:59:59.000Z

388

??? Decay Mode of Neutral K Mesons  

Science Journals Connector (OSTI)

The decay K??++?-+?, ??e++e- has been observed in the film of the UCRL 72-in. hydrogen bubble chamber exposed to a beam of 1325-MeV/c momentum negative pions. This event unambiguously fits only the decay mode K??+?+?, but because the K's life span is almost exactly one K10 lifetime it is impossible to say whether it is a direct ??? or inner bremsstrahlung accompanying normal K10?2? decay.

D. Stern

1962-10-01T23:59:59.000Z

389

Direct CP violation in B decays  

E-Print Network (OSTI)

We review recent experimental results on direct CP violation. The hot topic is a measurement in charmless two-body decays of B0, B+. In connection to this the first analogous measurements in Bs0 and Lambda_b0 decays are now available. Furthermore first evidence for direct CP violation in B+ decays is obtained from Dalitz plot analyzes of the K+pi-pi+ final state at B-factories. The last group of discussed results probes the b -> c\\bar{c}d transition in attempt to resolve the discrepancy between Belle and BABAR experiments in CP violation in the B0 -> D+D- decays.

M. Kreps

2008-06-30T23:59:59.000Z

390

Nuclear beta-decay measurements and |Vud|  

E-Print Network (OSTI)

Some recent work in nuclear beta decay related to the value of |Vud| is described along with some near-term goals for future measurements.

Dan Melconian

2011-08-11T23:59:59.000Z

391

New limits for neutrinoless tau decays  

E-Print Network (OSTI)

double beta decays, neutrino oscillations, Z!l11l22 decays, and other rare pro- cesses. In particular, there are strict limits on muon neutrino- less decays: B(m!eg),4.9310211 and B(m!eee),2.4 310212 at 90% confidence level @18#. However, lepton num- ber... particles and on the new coupling constants. The most optimistic branching fraction predictions are at the level of about 1026. Constraints on lepton flavor violation come from studies of rare and forbidden K , p, and m decays, e-m conversions, neutrinoless...

Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Darling, C.; Davis, Robin E. P.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan; Zhou, L.

1998-05-01T23:59:59.000Z

392

Review of double beta decay experiments  

E-Print Network (OSTI)

The brief review of current experiments on search and studying of double beta decay processes is done. Best present limits on $\\langle m_{\

A. S. Barabash

2014-03-12T23:59:59.000Z

393

Spectroscopy of element 115 decay chains  

SciTech Connect

A high-resolution a, X-ray and -ray coincidence spectroscopy experiment was conducted at the GSI Helmholtzzentrum fu r Schwerionenforschung. Thirty correlated a-decay chains were detected following the fusion-evaporation reaction 48Ca + 243Am. The observations are consistent with previous assignments of similar decay chains to originate from element Z = 115. The data includes first candidates of fingerprinting the decay step Mt --> Bh with characteristic X rays. For the first time, precise spectroscopy allows the derivation of excitation schemes of isotopes along the decay chains starting with elements Z > 112. Comprehensive Monte-Carlo simulations accompany the data analysis. Nuclear structure models provide a first level interpretation.

Rudolph, Dirk [Lund University, Sweden; Forsberg, U. [Lund University, Sweden; Golubev, P. [Lund University, Sweden; Sarmiento, L. G. [Lund University, Sweden; Yakushev, A. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Andersson, L.-L. [Johannes Gutenberg-Universitaet Mainz, Mainz, Germany; Di Nitto, A. [Johannes Gutenberg-Universitaet Mainz, Mainz, Germany; Duehllmann, Ch. E. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Gates, J. M. [Lawrence Berkeley National Laboratory (LBNL); Gregorich, K. E. [Lawrence Berkeley National Laboratory (LBNL); Gross, Carl J [ORNL; Hessberger, F. P. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Herzberg, R.-D [University of Liverpool; Khuyagbaatar, J. [Johannes Gutenberg-Universitaet Mainz, Mainz, Germany; Kratz, J. V. [Johannes Gutenberg-Universitaet Mainz, Mainz, Germany; Rykaczewski, Krzysztof Piotr [ORNL; Schaedel, M. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Aberg, S. [Lund University, Sweden; Ackermann, D. [GSI-Hemholtzzentrum fur Schwerionenforschung, Darmstadt, Germany; Block, M. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Brand, H. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Carlsson, B. G. [Lund University, Sweden; Cox, D. [University of Liverpool; Derkx, X. [Johannes Gutenberg-Universitaet Mainz, Mainz, Germany; Eberhardt, K. [Johannes Gutenberg-Universitaet Mainz, Mainz, Germany; Even, J. [Johannes Gutenberg-Universitaet Mainz, Mainz, Germany; Fahlander, C. [Lund University, Sweden; Gerl, J. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Jaeger, E. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Kindler, B. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Krier, J. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Kojouharov, I. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Kurz, N. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Lommel, B. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Mistry, A. [University of Liverpool; Mokry, C. [Johannes Gutenberg-Universitaet Mainz, Mainz, Germany; Nitsche, H. [Lawrence Berkeley National Laboratory (LBNL); Omtvedt, J. P. [Paul Scherrer Institut, Villigen, Switzerland; Papadakis, P. [University of Liverpool; Ragnarsson, I. [Lund University, Sweden; Runke, J. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Schaffner, H. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Schausten, B. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Thoerle-Pospiech, P. [Johannes Gutenberg-Universitaet Mainz, Mainz, Germany; Torres, T. [Gesellschaft fur Schwerionenforschung (GSI), Germany; Traut, T. [Johannes Gutenberg-Universitaet Mainz, Mainz, Germany; Trautmann, N. [Johannes Gutenberg-Universitaet Mainz, Mainz, Germany; Tuerler, A. [Paul Scherrer Institut, Villigen, Switzerland; Ward, A. [University of Liverpool; Ward, D. E. [Lund University, Sweden; Wiehl, N. [Johannes Gutenberg-Universitaet Mainz, Mainz, Germany

2013-01-01T23:59:59.000Z

394

Phenomenology of charmless hadronic B decays  

E-Print Network (OSTI)

The decays of $B$ mesons to a pair of charmless pseudoscalar mesons ($PP$ decays) or to a vector and pseudoscalar meson ($VP$ decays) have been analyzed within the framework of flavor SU(3) symmetry and the Kobayashi-Maskawa mechanism of CP violation. Separate $PP$ and $VP$ fits proved to be successful in describing the experimental data (branching ratios, CP asymmetries and time-dependent parameters). Decay magnitudes and relative weak and strong phases have been extracted from the fits. Values of the weak phase $\\gamma$ were found to be consistent with the current indirect bounds from other analyses of CKM parameters.

Suprun, D A

2005-01-01T23:59:59.000Z

395

Phenomenology of charmless hadronic B decays  

E-Print Network (OSTI)

The decays of $B$ mesons to a pair of charmless pseudoscalar mesons ($PP$ decays) or to a vector and pseudoscalar meson ($VP$ decays) have been analyzed within the framework of flavor SU(3) symmetry and the Kobayashi-Maskawa mechanism of CP violation. Separate $PP$ and $VP$ fits proved to be successful in describing the experimental data (branching ratios, CP asymmetries and time-dependent parameters). Decay magnitudes and relative weak and strong phases have been extracted from the fits. Values of the weak phase $\\gamma$ were found to be consistent with the current indirect bounds from other analyses of CKM parameters.

Denis A. Suprun

2004-10-22T23:59:59.000Z

396

Review of double beta decay experiments  

E-Print Network (OSTI)

The brief review of current experiments on search and studying of double beta decay processes is done. Best present limits on $\\langle m_{\

Barabash, A S

2014-01-01T23:59:59.000Z

397

Neutron Inelastic Scattering Processes as Background for Double-Beta Decay Experiments  

E-Print Network (OSTI)

We investigate several Pb$(n,n'\\gamma$) and Ge$(n,n'\\gamma$) reactions. We measure $\\gamma$-ray production from Pb$(n,n'\\gamma$) reactions that can be a significant background for double-beta decay experiments which use lead as a massive inner shield. Particularly worrisome for Ge-based double-beta decay experiments are the 2041-keV and 3062-keV $\\gamma$ rays produced via Pb$(n,n'\\gamma$). The former is very close to the ^{76}Ge double-beta decay endpoint energy and the latter has a double escape peak energy near the endpoint. Excitation $\\gamma$-ray lines from Ge$(n,n'\\gamma$) reactions are also observed. We consider the contribution of such backgrounds and their impact on the sensitivity of next-generation searches for neutrinoless double-beta decay using enriched germanium detectors.

D. -M. Mei; S. R. Elliott; A. Hime; V. Gehman; K. Kazkaz

2007-04-03T23:59:59.000Z

398

Measurement of CP-violating asymmetries in B0 decays to CP eigenstates  

E-Print Network (OSTI)

We present measurements of time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurement uses a data sample of 23 million Upsilon(4S)-->B-anti-B decays collected by the BABAR detector at the PEP-II asymmetric B Factory at SLAC. In this sample, we find events where one neutral B meson is fully reconstructed in a CP eigenstate containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the Standard Model is proportional to sin2beta, is derived from the decay time distributions in such events. The result is sin2beta=0.34 +/- 0.20 (stat) +/- 0.05 (syst).

Aubert, Bernard; De Bonis, I; Gaillard, Jean-Marc; Jérémie, A; Karyotakis, Yu; Lees, J P; Robbe, P; Tisserand, V; Palano, A; Chen, G P; Chen, J C; Qi, N D; Rong, G; Wang, P; Zhu, Y S; Eigen, G; Reinertsen, P L; Stugu, B; Abbott, B; Abrams, G S; Borgland, A W; Breon, A B; Brown, D N; Button-Shafer, J; Cahn, R N; Clark, A R; Dardin, S; Day, C; Dow, S F; Elioff, T; Fan, Q; Gaponenko, I A; Gill, M S; Goozen, F R; Gowdy, S J; Gritsan, A; Groysman, Y; Jacobsen, R G; Jared, R C; Kadel, R W; Kadyk, J; Karcher, A; Kerth, L T; Kipnis, I; Kluth, S; Kolomensky, Yu G; Kral, J F; Lafever, R; Le Clerc, C; Levi, M E; Lewis, S A; Lionberger, C A; Liu, T; Long, M; Lynch, G; Marino, M; Marks, K; Matuk, C A; Meyer, A B; Mokhtarani, A; Momayezi, M; Nyman, M A; Oddone, P J; Ohnemus, J; Oshatz, D; Patton, S; Perazzo, A; Peters, C; Pope, W; Pripstein, M; Quarrie, D R; Rasson, J E; Roe, N A; Romosan, A; Ronan, Michael T; Shelkov, V G; Stone, R; Telnov, A V; Weber, T; Wenzel, W A; Zisman, M S; Bright-Thomas, P G; Harrison, T J; Hawkes, C M; Kirk, A; Knowles, D J; O'Neale, S W; Watson, A T; Watson, N K; Deppermann, T; Koch, H; Krug, J; Kunze, M; Lewandowski, B; Peters, K; Schmücker, H; Steinke, M; Andress, J C; Barlow, N R; Bhimji, W; Chevalier, N; Clark, P J; Cottingham, W N; De, N; De Groot, J G H; Dyce, N; Foster, B; Mass, A; McFall, J D; Wallom, D; Wilson, F F; Abe, K; Hearty, C; Mattison, T S; McKenna, J A; Thiessen, D; Camanzi, B; Jolly, S; McKemey, A K; Tinslay, J; Blinov, V E; Bukin, A D; Bukin, D A; Buzykaev, A R; Dubrovin, M S; Golubev, V B; Ivanchenko, V N; Kolachev, G M; Korol, A A; Kravchenko, E A; Onuchin, A P; Salnikov, A A; Serednyakov, S I; Skovpen, Yu I; Telnov, V I; Yushkov, A N; Lankford, A J; Mandelkern, M A; McMahon, S; Stoker, D P; Ahsan, A; Buchanan, C; Chun, S; Branson, J G; MacFarlane, D B; Prell, S; Rahatlou, S; Raven, G; Sharma, V; Burke, S; Campagnari, C; Dahmes, B; Hale, D; Hart, P A; Kuznetsova, N; Kyre, S; Levy, S L; Long, O; Lu, A; Richman, J D; Verkerke, W; Witherell, M; Yellin, S; Beringer, J; Dorfan, D E; Eisner, A M; Frey, A; Grillo, A A; Grothe, M; Heusch, C A; Johnson, R P; Kröger, W; Lockman, W S; Pulliam, T; Sadrozinski, H F W; Schalk, T L; Schmitz, R E; Schumm, B A; Seiden, A; Spencer, E N; Turri, M; Walkowiak, W; Williams, D C; Chen, E; Dubois-Felsmann, G P; Dvoretskii, A; Hanson, J E; Hitlin, D G; Metzler, S; Oyang, J; Porter, F C; Ryd, A; Samuel, A; Weaver, M; Yang, S; Zhu, R Y; Devmal, S C; Geld, T L; Jayatilleke, S M; Mancinelli, G; Meadows, B T; Sokoloff, M D; Bloom, P; Fahey, S; Ford, W T; Gaede, F; Van Hoek, W C; Johnson, D R; Michael, A K; Nauenberg, U; Olivas, A; Park, H; Rankin, P; Roy, J; Sen, S; Smith, J G; Wagner, D L; Blouw, J; Harton, J L; Krishnamurthy, M; Soffer, A; Toki, W H; Warner, D W; Wilson, R J; Zhang, J; Brandt, T; Brose, J; Colberg, T; Dahlinger, G; Dickopp, M; Dubitzky, R S; Eckstein, P; Futterschneider, H; Krause, R; Maly, E; Müller-Pfefferkorn, R; Otto, S; Schubert, Klaus R; Schwierz, R; Spaan, B; Wilden, L; Behr, L; Bernard, D; Bonneaud, G R; Brochard, F; Cohen-Tanugi, J; Ferrag, S; Fouque, G; Gastaldi, F; Matricon, P; Mora de Freitas, P; Renard, C; Roussot, E; T'Jampens, S; Thiebaux, C; Vasileiadis, G; Verderi, M; Anjomshoaa, A; Bernet, R; Di Lodovico, F; Khan, A; Muheim, F; Playfer, S; Swain, J E; Falbo, M; Bozzi, C; Dittongo, S; Folegani, M; Piemontese, L; Treadwell, E; Anulli, F; Baldini-Ferroli, R; Calcaterra, A; De Sangro, R; Falciai, D; Finocchiaro, G; Patteri, P; Peruzzi, I M; Piccolo, M; Xie, Y; Zallo, A; Bagnasco, S; Buzzo, A; Contri, R; Crosetti, G; Lo Vetere, M; Macri, M; Monge, M R; Pallavicini, M; Passaggio, S; Pastore, F C; Patrignani, C; Pia, M G; Robutti, E; Santroni, A; Morii, M; Bartoldus, R; Dignan, T; Hamilton, R; Mallik, U; Cochran, J; Crawley, H B; Fischer, P A; Lamsa, J; McKay, R; Meyer, W T; Rosenberg, E I; Albert, J N; Beigbeder-Beau, C; Benkebil, M; Breton, D; Cizeron, R; Du, S; Grosdidier, G; Hast, C; Höcker, A; Le Peltier, V; Lutz, A M; Plaszczynski, S; Schune, M H; Trincaz-Duvoid, S; Truong, K D; Valassi, Andrea; Wormser, G; Bionta, R M; Brigljevic, V; Brooks, A; Fackler, O; Fujino, D; Lange, D J; Mugge, M; O'Connor, T G; Pedrotti, B; Shi, X; Van Bibber, K; Wenaus, T J; Wright, D M; Wuest, C R; Yamamoto, B; Carroll, M; Fry, J R; Gabathuler, Erwin; Gamet, R; George, M; Kay, M; Payne, D J; Sloane, R J; Touramanis, C; Aspinwall, M L; Bowerman, D A; Dauncey, P D; Egede, U; Eschrich, I; Gunawardane, N J W; Martin, R; Nash, J A; Price, D R; Sanders, P; Smith, D; Azzopardi, D E; Back, J J; Dixon, P; Harrison, P F; Newman-Coburn, D; Potter, R J L; Shorthouse, H W; Strother, P; Vidal, P B; Williams, M I; Cowan, G; George, S; Green, M G; Kurup, A; Marker, C E; McGrath, P; McMahon, T R; Salvatore, F; Scott, I; Vaitsas, G; Brown, D; Davis, C L; Ford, K; Li, Y; Pavlovich, J; Allison, J; Barlow, R J; Boyd, J T

2001-01-01T23:59:59.000Z

399

Improvements on Decay Heat Summation Calculations by Means of Total Absorption Gamma-ray Spectroscopy Measurements  

SciTech Connect

The decay heat of fission products plays an important role in predictions of the heat released by nuclear fuel in reactors. In this contribution we present results of the analysis of the measurement of the beta decay of some refractory isotopes that were considered possible important contributors to the decay heat in reactors. The measurements presented here were performed at the IGISOL facility of the University of Jyvaeskylae, Finland. In our measurements we have combined for the first time a Penning trap (JYFLTRAP), which was used as a high resolution isobaric separator, with a total absorption spectrometer. The results of the measurements as well as their consequences for decay heat summation calculations are discussed.

Algora, A.; Sonzogni, A.; Algora, A.; Jordan, D.; Tain, J. L.; Rubio, B.; Agramunt, J.; Caballero, L.; Nacher, E.; Perez-Cerdan, A. B.; Molina, F.; Krasznahorkay, A.; Hunyadi, M. D.; Gulyas, J.; Vitez, A.; Csatlos, M.; Csige, L.; Aysto, J.; Penttila, H.; Rinta-Antila, S.; Moore, I.; Eronen, T.; Jokinen, A.; Nieminen, A.; Hakala, J.; Karvonen, P.; Kankainen, A.; Hager, U.; Sonoda, T.; Saastamoinen, A.; Rissanen, J.; Kessler, T.; Weber, C.; Ronkainen, J.; Rahaman, S.; Elomaa, V.; Burkard, K.; Hueller, W.; Batist, L.; Gelletly, W.; Yoshida, T.; Nichols, A. L.; Sonzogni, A.; Perajarvi, K.

2011-08-01T23:59:59.000Z

400

Assessment of the radiological impact of gamma and radon dose rates at former U mining sites in Central Asia  

Science Journals Connector (OSTI)

An assessment of the radiological situation due to exposure to gamma radiation, radon and thoron was carried out at selected former uranium mining and processing sites in the Central Asian countries of Kazakhstan, Kyrgyzstan, Uzbekistan and Tajikistan. Gamma dose rate measurements were made using various field instruments and radon/thoron measurements were carried out using discriminative radon (222Rn)/thoron (220Rn) solid state nuclear track detectors (SSNTD). The detectors were exposed for an extended period of time, including at least three seasonal periods in a year, in different outdoor and indoor public and residential environments at the selected uranium legacy sites. The results showed that gamma, Rn and Tn doses were in general low, which consequently implies a low/relatively low radiological risk. The major radiation hazard is represented by abandoned radioactive filtration material that was being used as insulation by some Minkush residents (Kyrgyzstan) for a longer period of time. Annual radiation doses of several hundred mSv could be received as a consequence of using this material domestically. In addition, the gamma and Rn/Tn dose rates at Digmai, Tajikistan, could reach values of several 10 mSv/a. The doses of ionizing radiation deriving from external radiation (gamma dose rate), indoor radon and thoron with their short-lived progenies in several cases exceeded the recommended annual effective dose threshold level of 10 mSv. At none of the sites investigated did the individual annual effective doses exceed 30 mSv, the internationally recommended value for considering intervention. Current doses of ionizing radiation do not represent a serious hazard to the health of the resident public, but this issue should be adequately addressed to further reduce needless exposure of the resident public to ionizing radiation.

P. Stegnar; I. Shishkov; M. Burkitbayev; B. Tolongutov; M. Yunusov; R. Radyuk; B. Salbu

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Low Radioactivity Crystals for Neutrinoless Double Beta Decay Detectors  

Science Journals Connector (OSTI)

The production of crystals needed for rare events physics represent a relatively new exciting challenge in the field of materials science and engineering. Extremely low concentration of radioactive impurities and very high crystal perfection is required for the crystals to be used in experiments in which the main concerns are the reduction of the background and the use of high sensitivity detectors. A further complication is the fact that for an experiment with a significant discovery potential relatively large quantities of crystals are needed. The present work makes a review of the general problems related to the production of crystals for rare events physics and gives details related to the production of the TeO 2 crystals needed for the major experiment in this field using bolometric technique namely the CUORE experiment. The potential use of crystals for future double beta decay experiments is also discussed.

Ioan Dafinei; CUORE Collaboration

2011-01-01T23:59:59.000Z

402

Time?dependent theory of alpha decay  

Science Journals Connector (OSTI)

Using Green’s function techniques a time?dependent theory of ? decay in the standard one?body model is developed. Formulas are obtained for the decay rate and ? energy. These formulas are combined with experimental information to show that to a good approximation the i n i t i a l ??particle wave function vanishes on or near the nuclear surface.

Michael G. Fuda

1984-01-01T23:59:59.000Z

403

Gross Theory of ?-Decay and Shell Effects  

Science Journals Connector (OSTI)

......nuclear final state measured fr:orn the parent. Although actual decays pro- Gross Theory of f3-Decay and Shell Effects 137 ceed only to the region of negative values of E, we extend our consideration to the positive region. Now, we can regard the whole......

Takayoshi Kondoh; Masami Yamada

1976-03-01T23:59:59.000Z

404

Spectroscopy and decays of charm and bottom  

SciTech Connect

After a brief review of the quark model, we discuss our present knowledge of the spectroscopy of charm and bottom mesons and baryons. We go on to review the lifetimes, semileptonic, and purely leptonic decays of these particles. We conclude with a brief discussion B and D mixing and rare decays.

Butler, J.N.

1997-10-01T23:59:59.000Z

405

Observing Nucleon Decay in Lead Perchlorate  

E-Print Network (OSTI)

Lead perchlorate, part of the OMNIS supernova neutrino detector, contains two nuclei, 208Pb and 35Cl, that might be used to study nucleon decay. Both would produce signatures that will make them especially useful for studying less-well-studied neutron decay modes, e.g., those in which only neutrinos are emitted.

R. N. Boyd; T. Rauscher; S. D. Reitzner; P. Vogel

2003-07-22T23:59:59.000Z

406

Strong effects in weak nonleptonic decays  

SciTech Connect

In this report the weak nonleptonic decays of kaons and hyperons are examined with the hope of gaining insight into a recently proposed mechanism for the ..delta..I = 1/2 rule. The effective Hamiltonian for ..delta..S = 1 weak nonleptonic decays and that for K/sup 0/-anti K/sup 0/ mixing are calculated in the six-quark model using the leading logarithmic approximation. These are used to examine the CP violation parameters of the kaon system. It is found that if Penguin-type diagrams make important contributions to K ..-->.. ..pi pi.. decay amplitudes then upcoming experiments may be able to distinguish the six-quark model for CP violation from the superweak model. The weak radiative decays of hyperons are discussed with an emphasis on what they can teach us about hyperon nonleptonic decays and the ..delta..I = 1/2 rule.

Wise, M.B.

1980-04-01T23:59:59.000Z

407

Magnetic field decay in model SSC dipoles  

SciTech Connect

We have observed that some of our model SSC dipoles have long time constant decays of the magnetic field harmonics with amplitudes large enough to result in significant beam loss, if they are not corrected. The magnets were run at constant current at the SSC injection field level of 0.3 tesla for one to three hours and changes in the magnetic field were observed. One explanation for the observed field decay is time dependent superconductor magnetization. Another explanation involves flux creep or flux flow. Data are presented on how the decay changes with previous flux history. Similar magnets with different Nb-Ti filament spacings and matrix materials have different long time field decay. A theoretical model using proximity coupling and flux creep for the observed field decay is discussed. 10 refs., 5 figs., 2 tabs.

Gilbert, W.S.; Althaus, R.F.; Barale, P.J.; Benjegerdes, R.W.; Green, M.A.; Green, M.I.; Scanlan, R.M.

1988-08-01T23:59:59.000Z

408

Improved Limits on $B^{0}$ Decays to Invisible $(+gamma)$ Final States  

SciTech Connect

We establish improved upper limits on branching fractions for B{sup 0} decays to final states where the decay products are purely invisible (i.e., no observable final state particles) and for final states where the only visible product is a photon. Within the Standard Model, these decays have branching fractions that are below the current experimental sensitivity, but various models of physics beyond the Standard Model predict significant contributions for these channels. Using 471 million B{bar B} pairs collected at the {Upsilon} (4S) resonance by the BABAR experiment at the PEP-II e{sup +}e{sup -} storage ring at the SLAC National Accelerator Laboratory, we establish upper limits at the 90% confidence level of 2.4 x 10{sup -5} for the branching fraction of B{sup 0} {yields} invisible and 1.7 x 10{sup -5} for the branching fraction of B{sup 0} {yields} invisible + {gamma}.

Lees, J.P.; Poireau, V.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Palano, A.; /Bari U. /INFN, Bari; Eigen, G.; Stugu, B.; /Bergen U.; Brown, David Nathan; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G.; /LBL, Berkeley /UC, Berkeley; Koch, H.; Schroeder, T.; /Ruhr U., Bochum; Asgeirsson, D.J.; Hearty, C.; Mattison, T.S.; McKenna, J.A.; So, R.Y.; /British Columbia U.; Khan, A.; /Brunel U.; Blinov, V.E.; /Novosibirsk, IYF /UC, Irvine /UC, Riverside /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. /Dortmund U. /Dresden, Tech. U. /Ecole Polytechnique /Edinburgh U. /Ferrara U. /INFN, Ferrara /Frascati /Genoa U. /INFN, Genoa /Indian Inst. Tech., Guwahati /Harvard U. /Harvey Mudd Coll. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa State U. /Iowa State U. /Johns Hopkins U. /Orsay, LAL /LLNL, Livermore /Liverpool U. /Queen Mary, U. of London /Royal Holloway, U. of London /Louisville U. /Mainz U., Inst. Kernphys. /Manchester U., Comp. Sci. Dept. /Maryland U. /Massachusetts U., Amherst /MIT /McGill U. /Milan U. /INFN, Milan /Mississippi U. /Montreal U. /Naples U. /INFN, Naples /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U.; /more authors.; ,

2013-11-01T23:59:59.000Z

409

QCD analysis of inclusive B decay into charmonium  

Science Journals Connector (OSTI)

We compute the decay rates and H-energy distributions of B mesons into the final state H+X, where H can be any one of the S-wave or P-wave charmonia, at next-to-leading order in the strong coupling. We find that a significant fraction of the observed J/?,?? and ?c must be produced through cc¯ pairs in a color octet state and should therefore be accompanied by more than one light hadron. At the same time we obtain stringent constraints on some of the long-distance parameters for color octet production.

M. Beneke; F. Maltoni; I. Z. Rothstein

1999-01-21T23:59:59.000Z

410

Electromagnetic transitions and ? decay of the 223Pa nucleus  

Science Journals Connector (OSTI)

Actinides with N?132 present the best explored region of pear shape nuclei. Still almost no spectroscopic information is available for the heaviest elements, Z=91–98, which are predicted to be octupole instable. The lack of data for the latter nuclei results from the high fission probability encountered in the heavy-ion reactions used to populate them. In order to overcome this handicap, an ?-decay tagging technique was used to identify ? rays in 223Pa produced through the 208Pb(19F,4n) reaction. A new value of 4.9(4) ms for the half-life of 223Pa was obtained as a by-product.

F. Hoellinger; B. J. P. Gall; N. Schulz; N. Amzal; P. A. Butler; P. T. Greenlees; D. Hawcroft; J. F. C. Cocks; K. Helariutta; P. M. Jones; R. Julin; S. Juutinen; H. Kankaanpää; H. Kettunen; P. Kuusiniemi; M. Leino; M. Muikku; D. Savelius

1999-10-04T23:59:59.000Z

411

What can we learn from neutrinoless double beta decay experiments?  

E-Print Network (OSTI)

312 P. Vogel, “Limits From Neutrinoless Double-Beta Decay (Assumptions No detected neutrinoless double ?-decay lightestscale (1 ± 0.05 eV), No neutrinoless double ?-decay lightest

Bahcall, John N.

2009-01-01T23:59:59.000Z

412

Neutrinoless Double Beta Decay in Light of SNO Salt Data  

E-Print Network (OSTI)

14] P. Vogel, “Limits From Neutrinoless Double-Beta Decay (Higgs, can also cause neutrinoless double-beta decay (seeLBNL-53996 Neutrinoless Double Beta Decay in Light of SNO

Murayama, Hitoshi

2009-01-01T23:59:59.000Z

413

Proceedings of 7th Pacific Rim Bio-based Composite Symposium. Nanjing, China. October Mechanical Properties and Decay Resistance of Wood-Polymer  

E-Print Network (OSTI)

. Mechanical Properties and Decay Resistance of Wood-Polymer Composites Modified with Chitosan Copper Complexes complexes (CCC); fungal decay resistance; mechanical properties; wood-polymer composite ABSTRACT Wood-polymer composites (WPC) have been extensively used for building products, automotive, packaging materials, and other

414

Neutrinoless double beta decay and nuclear matrix elements  

Science Journals Connector (OSTI)

The fundamental importance of searching for neutrinoless double?beta decay (0????decay) is widely recognized. Observation of the decay would tell us that the total lepton number is not conserved and that consequently neutrinos are massive Majorana fermions. The 0????decay is discussed in context of neutrino oscillation data. The perspectives of the experimental 0????decay searches are analyzed. The importance of reliable determination of the 0????decay nuclear matrix elements is pointed out.

2011-01-01T23:59:59.000Z

415

Feed Materials Production Center annual environmental report for calendar 1989  

SciTech Connect

The mission of the Department of Energy's (DOE) Feed Materials Production Center (FMPC) has been to process uranium for United States' defense programs. On July 10, 1989, the FMPC suspended production operations, but remains on standby for certain segments of production. The FMPC also manages the storage of some radioactive and hazardous materials. As part of its operations, the FMPC continuously monitors the environment to determine that it is operating within federal and state standards and guidelines regarding emission of radioactive and nonradioactive materials. Data collected from the FMPC monitoring program are used to calculate estimates of radiation dose for residents due to FMPC operations. For 1989, the estimate of dose through the air pathway, excluding radon, indicated that people in the area were exposed to less than 6% of the DOE guideline established to protect the public from radiation exposure. When radon emissions are included, the dose from FMPC operations during 1989 was less than 22% of the annual background radiation dose in the Greater Cincinnati area. This report is a summary of FMPC's environmental activities and monitoring program for 1989. An Environmental Compliance Self-Assessment presents the FMPC's efforts to comply with environmental regulations through June 1990. 44 refs., 48 figs.

Dugan, T.A.; Gels, G.L.; Oberjohn, J.S.; Rogers, L.K.

1990-10-01T23:59:59.000Z

416

Uranium-238 and thorium-232 series concentrations in soil, radon-222 indoor and drinking water concentrations and dose assessment in the city of Aldama, Chihuahua, Mexico  

Science Journals Connector (OSTI)

High-resolution gamma spectrometry was used to determine the concentration of 40K, 238U and 232Th series in soil samples taken from areas surrounding the city of Aldama, in Chihuahua. Results of indoor air short-time sampling, with diffusion barrier charcoal detectors, revealed relatively high indoor radon levels, ranging from 29 to 422 Bq/m3; the radon concentrations detected exceeded 148 Bq/m3 in 76% of the homes tested. Additionally, liquid scintillation counting showed concentrations of radon in drinking water ranging from 4.3 to 42 kBq/m3. The high activity of 238U in soil found in some places may be a result of the uranium milling process performed 20 years ago in the area. High radon concentrations indoor and in water may be explained by assuming the presence of uranium-bearing rocks underneath of the city, similar to a felsic dike located near Aldama. The estimated annual effective dose of gamma radiation from the soil and radon inhalation was 3.83 mSv.

L. Colmenero Sujo; M.E. Montero Cabrera; L. Villalba; M. Rentería Villalobos; E. Torres Moye; M. García León; R. García-Tenorio; F. Mireles García; E.F. Herrera Peraza; D. Sánchez Aroche

2004-01-01T23:59:59.000Z

417

Production of Meson Pairs Involving $L \  

E-Print Network (OSTI)

We present a formalism for studying the exclusive production or decay of mesons with any value of the internal orbital angular momentum L. As an application, we discuss the production of meson pairs (involving tensor and pseudotensor mesons) in photon-photon collisions.

Houra-Yaou, L; Parisi, J; Murgia, F; Hansson, J

1997-01-01T23:59:59.000Z

418

Excited quark production at the CERN LHC  

Science Journals Connector (OSTI)

We study the production of excited quarks q? of spin-1/2 predicted by composite models. Production rates, signatures, and backgrounds are discussed for the CERN LHC. We estimate the discovery mass reach for the excited quarks decaying to jet+photon.

O. Çak?r and R. Mehdiyev

1999-06-22T23:59:59.000Z

419

Photoproduction and Decay of Light Mesons in CLAS  

SciTech Connect

We present preliminary experimental results on photoproduction and decay of light mesons measured with CLAS setup at JLAB . This include Dalitz decay of pseudoscalar and vector mesons, radiative decay of pseudoscalar mesons as well hadronic decays of pseudoscalar and vector mesons. The collected high statistics in some of decay channels exceeds the world data by an order of magnitude and some other decay modes are observed for the first time. It is shown how the CLAS data will improve the world data on transition form factors of light mesons, Dalitz plot analyses, branching ratios of rare decay modes and other fundamental properties potentially accessible through the light meson decays.

Amaryan, Moskov Jamalovich [Old Dominion University

2013-08-01T23:59:59.000Z

420

A Search for Neutrinoless Double Beta Decay of Te-130.  

E-Print Network (OSTI)

??This dissertation describes an experimental search for neutrinoless double beta (0???) decay of 130Te. An observation of 0??? decay would establish that neutrinos are Majorana… (more)

Bryant, Adam Douglas

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Search for: "neutrinoless double beta decay" | DOE PAGES  

Office of Scientific and Technical Information (OSTI)

neutrinoless double beta decay" Find + Advanced Search Advanced Search All Fields: "neutrinoless double beta decay" Title: Full Text: Bibliographic Data: Creator Author: Name...

422

Explaining the CMS eejj Excess With R?parity Violating Supersymmetry and Implications for Neutrinoless Double Beta Decay  

E-Print Network (OSTI)

IPPP/14/78, DCPT/14/156 Explaining the CMS eejj Excess With R?parity Violating Supersymmetry and Implications for Neutrinoless Double Beta Decay Ben Allanach,1 Sanjoy Biswas,2 Subhadeep Mondal,3 and Manimala Mitra4 1DAMTP, CMS, Wilberforce Road... production, followed by the three body decays of neutralino and chargino via R-parity violating coupling. These fit the excess for slepton and sneutrino masses around 2 TeV. This scenario can further be tested in neutrinoless double beta decay experiment (0...

Allanach, Ben; Biswas, Sanjoy; Mondal, Subhadeep; Mitra, Manimala

2015-01-01T23:59:59.000Z

423

An investigation of radon release and mobility in the subsurface environment. Final project report  

SciTech Connect

Processes affecting transport of volatile species in the shallow soil column have recently been recognized as having a substantial impact on a broad array of real world problems. Investigations of volatile transport have ranged from studies of probable health impacts of radon infiltration into homes to pesticide and volatile organic contaminant mobility in the soil column. The objectives of many of these studies has been the development of numerical models of vapor phase (and solute) transport in shallow soils. An early model, LEACHM, developed by Hutson and Wagenent was recently modified enabling it to describe both solute and vapor phase transport of volatile chemicals in the soil. Subsequent tests of the latter model, named LEACHV, showed that use outside of a very restricted range of soil conditions resulted in large mass balance errors and unreasonable values for soil gas concentrations and vapor flux. The present research was undertaken in an effort to identify and correct the subroutines responsible for the problems and to allow the model to describe vapor phase transport in a much broader range of soil conditions.

Thomas, D.

1997-06-01T23:59:59.000Z

424

Radioactive Decay of Lutetium-174  

Science Journals Connector (OSTI)

Ytterbium oxide enriched to 98.4% in the 174 mass number was irradiated with 6-Mev protons. An activity of approximately 165-day half-life was produced and assigned to Lu174 by the identification of the ytterbium K x-ray and of the activities produced by similar proton irradiations of the other enriched isotopes of ytterbium. The observed activity of Lu174 consists of the L and K x-rays of ytterbium and 76.6- and 1228-kev gamma rays which are in coincidence. Because no beta radiation exists in the activity of Lu174, the mode of decay is solely by electron capture to Yb174. Approximately 31% of the disintegrations of Lu174 are to the ground state of Yb174. In addition to the 76.6-kev level of Yb174, there is a 1305-kev level with a spin of 0+. The transitions of Lu174 to the 1305-kev level of Yb174 are by L capture only and the percentages of electron capture to the 76.6- and 1305-kev levels of Yb174 are approximately 59 and 10, respectively. A spin of 1- is assigned to the ground state of Lu174.

R. G. Wilson and M. L. Pool

1960-01-15T23:59:59.000Z

425

Quarkonium momentum distributions in photoproduction and B decay  

Science Journals Connector (OSTI)

According to our present understanding many J/? production processes proceed through a colored cc¯ state followed by the emission of soft particles in the quarkonium rest frame. The kinematic effect of soft particle emission is usually a higher-order effect in the non-relativistic expansion, but becomes important near the kinematic end point of quarkonium energy (momentum) distributions. In an intermediate region a systematic resummation of the non-relativistic expansion leads to the introduction of so-called “shape functions.” In this paper we provide an implementation of the kinematic effect of soft gluon emission which is consistent with the non-relativistic shape function formalism in the region where it is applicable and which models the extreme end point region. We then apply the model to photoproduction of J/? and J/? production in B meson decay. A satisfactory description of B decay data is obtained. For inelastic charmonium photoproduction we conclude that a sensible comparison of theory with data requires a transverse momentum cut larger than the currently used 1 GeV.

M. Beneke; G. A. Schuler; S. Wolf

2000-06-26T23:59:59.000Z

426

Can Dark Matter Decay in Dark Energy?  

E-Print Network (OSTI)

We analyze the interaction between Dark Energy and Dark Matter from a thermodynamical perspective. By assuming they have different temperatures, we study the possibility of occurring a decay from Dark Matter into Dark Energy, characterized by a negative parameter $Q$. We find that, if at least one of the fluids has non vanishing chemical potential, for instance $\\mu_x0$, the decay is possible, where $\\mu_x$ and $\\mu_{dm}$ are the chemical potentials of Dark Energy and Dark Matter, respectively. Using recent cosmological data, we find that, for a fairly simple interaction, the Dark Matter decay is favored with a probability of $\\sim 93%$ over the Dark Energy decay. This result comes from a likelihood analysis where only background evolution has been considered.

S. H. Pereira; J. F. Jesus

2009-02-26T23:59:59.000Z

427

Double Beta Decay Constraint on Composite Neutrinos  

Science Journals Connector (OSTI)

......Constraint on Composite Neutrinos Eiichi Takasugi Department of Physics, Osaka University, Toyonaka 560 Neutrinoless double beta decay (betabeta)0v occurs through the magnetic coupling of dimension five operator whose coupling constant is......

Eiichi Takasugi

1997-10-01T23:59:59.000Z

428

27 contribution to weak electromagnetic decays  

Science Journals Connector (OSTI)

We notice that the assumption of octet dominance of the Cabibbo weak Hamiltonian is not required to explain the weak electromagnetic decays. In order to explain large asymmetry parameter ?(?+?p?) we consider ?7 contribution to the parity-violating Hamiltonian.

Ramesh C. Verma and M. P. Khanna

1978-12-01T23:59:59.000Z

429

Probing QCD with Rare Charmless $B$ Decays  

SciTech Connect

Rare charmless hadronic B decays are a good testing ground for QCD. In this paper we describe a selection of new measurements made by the BABAR and BELLE collaborations.

Gradl, Wolfgang

2006-07-07T23:59:59.000Z

430

Uncertainty evaluation of delayed neutron decay parameters  

E-Print Network (OSTI)

parameters fit their individual measurement data well in spite of these differences. This dissertation focuses on evaluation of the errors and methods of delayed neutron relative yields and decay constants for thermal fission of U-235. Various numerical...

Wang, Jinkai

2009-05-15T23:59:59.000Z

431

Rare decays at the LHCb experiment  

E-Print Network (OSTI)

Rare decays of beauty and charm hadrons offer a rich playground to make precise tests of the Standard Model and look for New Physics at the level of quantum corrections. A review of recent LHCb results will be presented.

Luca Pescatore

2014-10-09T23:59:59.000Z

432

Three-body decay of (6)Be  

E-Print Network (OSTI)

Three-body correlations for the ground-state decay of the lightest two-proton emitter (6)Be are studied both theoretically and experimentally. Theoretical studies are performed in a three-body hyperspherical-harmonics cluster model...

Grigorenko, L. V.; Wiser, T. D.; Mercurio, K.; Charity, R. J.; Shane, R.; Sobotka, L. G.; Elson, J. M.; Wuosmaa, A. H.; Banu, A.; McCleskey, M.; Trache, L.; Tribble, Robert E.; Zhukov, M. V.

2009-01-01T23:59:59.000Z

433

Phenomenology of neutrinoless double beta decay  

E-Print Network (OSTI)

This paper reviews the current status and future outlook of neutrinoless double beta decay searches, which try to provide an answer to the fundamental question of whether neutrinos are Dirac or Majorana particles.

Gómez-Cadenas, J J

2015-01-01T23:59:59.000Z

434

Phenomenology of neutrinoless double beta decay  

E-Print Network (OSTI)

This paper reviews the current status and future outlook of neutrinoless double beta decay searches, which try to provide an answer to the fundamental question of whether neutrinos are Dirac or Majorana particles.

J. J. Gómez-Cadenas; Justo Martín-Albo

2015-02-02T23:59:59.000Z

435

Electrical Analogs of Atomic Radiative Decay Processes  

E-Print Network (OSTI)

Simple electrical circuits are analyzed, and the results show that for high frequencies they have frequency and time responses identical to the spontaneous radiative decays of atoms. As an illustration of the analogy a ...

Fontana, Peter R.; Srivastava, Rajendra P.

1977-03-01T23:59:59.000Z

436

CP Violation in Other Bs Decays  

E-Print Network (OSTI)

The recent experimental results of CP violation in Bs decays other than in the J/psi phi final state are discussed. Included are the resonant components and $\\phi_s$ determination in Bs -> J/psi pi+ pi-, CP asymmetries in Bs -> h+ h'- decays, and the Bs effective lifetimes in the CP-even state K+ K- and the CP-odd state J/psi f0(980).

L. Zhang; for the LHCb Collaboration

2012-08-24T23:59:59.000Z

437

Neutrinoless double beta decay with scalar bilinears  

E-Print Network (OSTI)

One possible probe to physics beyond the standard model is to look for scalar bilinears, which couple to two fermions of the standard model. We point out that the scalar bilinears allow new diagrams contributing to the neutrinoless double beta decay. The upper bound on the neutrinoless double beta decay lifetime would then give new constraints on the ratio of the masses of these scalars to their couplings to the fermions.

H. V. Klapdor-Kleingrothaus; U. Sarkar

2002-11-18T23:59:59.000Z

438

Decays of intermediate vector bosons, radiative corrections and QCD jets  

Science Journals Connector (OSTI)

We investigate decay properties of the intermediate vector bosons W± and Z0. QED and QCD radiative corrections to leptonic and hadronic decay modes are calculated. Implications of the results for decay widths, branching ratios, determination of the number of neutrino species, e-?-? universality and properties of hadronic jets produced in W± and Z0 decays are examined.

David Albert; William J. Marciano; Daniel Wyler; Zohreh Parsa

1980-01-01T23:59:59.000Z

439

Calculated final state probability distributions for T2 -decay measurements  

E-Print Network (OSTI)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 1.6.1 Neutrinoless double beta decay . . . . . . . . . . . . . . . . . . . . 19 1.6.2 Cosmological

Washington at Seattle, University of - Department of Physics, Electroweak Interaction Research Group

440

Radiative Decay Modes of the Muon  

Science Journals Connector (OSTI)

A 5-in. freon bubble chamber was used to search for the following decay modes of the ?+ meson: (1) ?+?e++?, (2) ?+?e++e-+e+, (3) ?+?e++?0+?¯0+?, (4) ?+?e++?0+?¯0+e++e-. Two exposures were made at the Carnegie Institute of Technology synchrocyclotron. A total of 200 000 pictures were taken yielding 3.3×105 ?+ meson decays.A total of 3×105 ?+ decays were examined for mode (1). No decays consistent with this mode were found. The upper limit on the branching ratio Rrad was found to be Rrad=(?+?e++?)(?+?e++?0+?¯0)<2.5×10-5.A total of 3.3×105 ?+ decays were scanned for mode (2) and no such decays were observed. The limit on the branching ratio R3e was found to be R3e=(?+?e++e-+e+)(?+?e++?0+?¯0)<4×10-6.The internal bremsstrahlung rate (mode 3) was measured for two values of E?0 (the minimum photon energy detected). The results were RIB=(?+?e++?0+?¯0+?)(?+?e++?0+?¯0), RIB=(1.4±0.4)×10-2, E?0=10 Mev, RIB=(3.3±1.3)×10-3, E?0=20 Mev.The rate of internal conversion of internal bremsstrahlung [mode (4)] was found to be RIC=(?+?e++?0+?¯0+e++e-)(?+?e++?0+?¯0)=(2.2±1.5)×10-5, E0=10 Mev, where E0 is the minimum energy of the internally converted ? ray.A summary is given of previous experiments on these decay modes and results are discussed with special reference to the intermediate boson scheme of weak four-fermion interactions.

R. R. Crittenden; W. D. Walker; J. Ballam

1961-03-15T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Theoretical uncertainties in the nuclear matrix elements of neutrinoless double beta decay: The transition operator  

SciTech Connect

We explore the theoretical uncertainties related to the transition operator of neutrinoless double-beta (0???) decay. The transition operator used in standard calculations is a product of one-body currents, that can be obtained phenomenologically as in Tomoda [1] or Šimkovic et al. [2]. However, corrections to the operator are hard to obtain in the phenomenological approach. Instead, we calculate the 0??? decay operator in the framework of chiral effective theory (EFT), which gives a systematic order-by-order expansion of the transition currents. At leading orders in chiral EFT we reproduce the standard one-body currents of Refs. [1] and [2]. Corrections appear as two-body (2b) currents predicted by chiral EFT. We compute the effects of the leading 2b currents to the nuclear matrix elements of 0??? decay for several transition candidates. The 2b current contributions are related to the quenching of Gamow-Teller transitions found in nuclear structure calculations.

Menéndez, Javier [Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt (Germany)

2013-12-30T23:59:59.000Z

442

12. CP violation in meson decays 1 12. CP VIOLATION IN MESON DECAYS  

E-Print Network (OSTI)

12. CP violation in meson decays 1 12. CP VIOLATION IN MESON DECAYS Revised May 2012 by D. Kirkby (UC Irvine) and Y. Nir (Weizmann Institute). The CP transformation combines charge conjugation C, for example, a left-handed electron e- L is transformed under CP into a right-handed positron, e+ R. If CP

443

12. CP violation in meson decays 1 12. CP VIOLATION IN MESON DECAYS  

E-Print Network (OSTI)

12. CP violation in meson decays 1 12. CP VIOLATION IN MESON DECAYS Revised August 2009 by D. Kirkby (UC Irvine) and Y. Nir (Weizmann Institute). The CP transformation combines charge conjugation C, for example, a left-handed electron e- L is transformed under CP into a right-handed positron, e+ R. If CP

444

Rare and forbidden decays of D Mesons  

SciTech Connect

The authors summarize the results of two recent searches for flavor-changing neutral current, lepton-flavor violating, and lepton-number violating decays of D{sup +}, D{sub s}{sup +}, and D{sup 0} mesons (and their antiparticles) into modes containing muons and electrons. using data from Fermilab charm hadroproduction experiment E791, they examined D{sup +} and D{sub s}{sup +} {pi}{ell}{ell} and {Kappa}{ell}{ell} decay modes and the D{sup 0} dilepton decay modes containing either {ell}{sup +}{ell}{sup {minus}}, a {rho}{sup 0}, {bar {Kappa}}*{sup 0}, or {phi} vector meson, or a non-resonant {pi}{pi}, {Kappa}{pi}, or {Kappa}{Kappa} pair of pseudoscalar mesons. No evidence for any of these decays was found. Therefore, the authors presented branching-fraction upper limits at 90% confidence level for the 51 decay modes examined. Twenty-six of these modes had no previously reported limits, and eighteen of the remainder were reported with significant improvements over previously published results.

David A. Sanders et al.

2001-05-23T23:59:59.000Z

445

Random matrix description of decaying quantum systems  

E-Print Network (OSTI)

This contribution describes a statistical model for decaying quantum systems (e.g. photo-dissociation or -ionization). It takes the interference between direct and indirect decay processes explicitely into account. The resulting expressions for the partial decay amplitudes and the corresponding cross sections may be considered a many-channel many-resonance generalization of Fano's original work on resonance lineshapes [Phys. Rev 124, 1866 (1961)]. A statistical (random matrix) model is then introduced. It allows to describe chaotic scattering systems with tunable couplings to the decay channels. We focus on the autocorrelation function of the total (photo) cross section, and we find that it depends on the same combination of parameters, as the Fano-parameter distribution. These combinations are statistical variants of the one-channel Fano parameter. It is thus possible to study Fano interference (i.e. the interference between direct and indirect decay paths) on the basis of the autocorrelation function, and thereby in the regime of overlapping resonances. It allows us, to study the Fano interference in the limit of strongly overlapping resonances, where we find a persisting effect on the level of the weak localization correction.

T. Gorin

2005-10-04T23:59:59.000Z

446

Leptonic B Decays at BaBar  

SciTech Connect

The authors will present the most recent results on leptonic B decays B{sup {+-}(0)} {yields} K*{sup {+-}(0)} {nu}{bar {nu}} and B{sup {+-}} {yields} {mu}{sup {+-}}{nu}, based on the data collected by the BaBar detector at PEP-II, an asymmetric e{sup +}e{sup -} collider at the center of mass energy of the {Upsilon}(4S) resonance. Rare B decays have always been a standard probe for New Physics (NP) searches. The very low Standard Model (SM) rate of these decays often make them unaccessible with the present experimental datasets, unless NP effects enhance the rate up to the current experimental sensitivity. Moreover, as NP effects can modify the decay kinematic, particular attention must be payed in order to perform a model independent analysis. A B-Factory provides an unique environment where to investigate these processes. The high number of B{bar B} pairs produced by a B-Factory often allows to approach the needed experimental sensitivity. Moreover, the clean environment and the closed kinematic of the initial state enable to obtaining a very pure sample where to look for these decays.

Monorchio, Diego; /INFN, Naples /Naples U.

2011-09-13T23:59:59.000Z

447

Neutron decay beyond the standard model.  

SciTech Connect

The authors discuss {beta} decay interactions in extensions of the Standard Model, and the role of {beta} decay experiments in obtaining information on them. Nuclear and neutron {beta} decay played an important role in the development of the Standard Model (SM). Today a major motivation for their further experimental study is the importance of searching for new-interactions. Despite the remarkable success of the SM, for many theoretical reasons the existence of new physics is expected. In fact, we have already the first strong experimental evidence, in the form of neutrino oscillations, that some extension of the SM is required. In this talk we shall discuss {beta} decay interactions in extensions of the SM [1]. We shall review the existing bounds on new interactions provided by {beta} decay experiments, and consider the constraints on them from other sources. In the next section we focus on time-reversal (T) invariant contributions. In Section 3 we discuss briefly the contributions from the T-violating components of the new interactions. Section 4 contains our conclusions.

Herczeg, P. (Peter)

2001-01-01T23:59:59.000Z

448

Baryons and Dark Matter from the Late Decay of a Supersymmetric Condensate  

E-Print Network (OSTI)

The possibility that both the baryon asymmetry and dark matter arise from the late decay of a population of supersymmetric particles is considered. If the decay takes place below the LSP freeze out temperature, a nonthermal distribution of LSPs results. With conserved $R$ parity these relic LSPs contribute to the dark matter density. A net asymmetry can exist in the population of decaying particles if it arises from coherent production along a supersymmetric flat direction. The asymmetry is transferred to baryons if the condensate decays through the lowest order nonrenormalizable operators which couple to $R$ odd combinations of standard model particles. This also ensures at least one LSP per decay. The relic baryon and LSP number densities are then roughly equal. The ratio of baryon to dark matter densities is then naturally $\\Omegab / \\OmegaLSP \\sim {\\cal O}(\\mb / \\mLSP)$. The resulting upper limit on the LSP mass is model dependent but in the range ${\\cal O}(30-140)$ GeV. The total relic density is related to the order at which the flat direction which gives rise to the condensate is lifted. The observed density is obtained for a direction which is lifted by a fourth order Planck scale suppressed operator in the superpotential.

Scott Thomas

1995-06-09T23:59:59.000Z

449

Computer program for the sensitivity calculation of a CR-39 detector in a diffusion chamber for radon measurements  

SciTech Connect

Computer software for calculation of the sensitivity of a CR-39 detector closed in a diffusion chamber to radon is described in this work. The software consists of two programs, both written in the standard Fortran 90 programming language. The physical background and a numerical example are given. Presented software is intended for numerous researches in radon measurement community. Previously published computer programs TRACK-TEST.F90 and TRACK-VISION.F90 [D. Nikezic and K. N. Yu, Comput. Phys. Commun. 174, 160 (2006); D. Nikezic and K. N. Yu, Comput. Phys. Commun. 178, 591 (2008)] are used here as subroutines to calculate the track parameters and to determine whether the track is visible or not, based on the incident angle, impact energy, etching conditions, gray level, and visibility criterion. The results obtained by the software, using five different V functions, were compared with the experimental data found in the literature. Application of two functions in this software reproduced experimental data very well, while other three gave lower sensitivity than experiment.

Nikezic, D., E-mail: nikezic@kg.ac.rs; Stajic, J. M. [Faculty of Science, University of Kragujevac, R. Domanovica 12, Kragujevac 34000 (Serbia)] [Faculty of Science, University of Kragujevac, R. Domanovica 12, Kragujevac 34000 (Serbia); Yu, K. N. [Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue (Hong Kong)] [Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue (Hong Kong)

2014-02-15T23:59:59.000Z

450

Rogers, V.C., K.K. Nielson, 1991, "Multiphase Radon Generation and Transport in Porous Minerals," Health Physics Vol. 60, No. 6, 807-813.  

E-Print Network (OSTI)

Radioactivity (TENR) Cause by Non-Uranium Mining, October 16-19, Szczyrk, Poland. Usman, S.S., H.Spitz, and J Limited presented at the Nuclear Regulatory Commission Uranium Recovery Licensing Workshop, January 11 to Monitor Radon Emissions from Uranium Tailings," Contract Number EP-D-05-002, Work Assignment No. 4

451

Estimation of dose contribution from 226Ra, 232Th and 40K radon exhalation rates in soil samples from Shivalik foot hills in India  

Science Journals Connector (OSTI)

......than the limit (370 Bq kg1) set in the 1979 Organization for Economic Co-operation and Development report. The calculated values...of radon exhalation rate and estimation of radiation doses in coal and fly ash samples. Appl. Radiat. Isot. (2008) 66:401-406......

R. P. Chauhan; Pooja Chauhan; Anil Pundir; Sunil Kamboj; Vakul Bansal; R. S. Saini

2014-01-01T23:59:59.000Z

452

Measurements of B?Ds(+)X decays  

E-Print Network (OSTI)

. THE B?DS ?*?1D¯ ?*? DECAY RATES In the dominant process leading to a two-body decay of the type B!Ds(*)1D (*), shown in Fig. 1, the Ds(*)1 is pro- duced from the fragmentation of the W1. The analogous b!u transitions lead to final states like Ds1p2...*5280 MeV, Vcb50.038, tB51.52 ps , and ua1u51.07 @14#, which was derived from B0!D (*)1p2/r2 decays. The CLEO II values are the values of Table VIII with all of the errors added in quadrature. Model Ds 1D¯ Ds* 1D¯ Ds 1D¯* Ds* 1D¯* BSW @19# 1.69 0.99 0...

Baringer, Philip S.

1996-05-01T23:59:59.000Z

453

Factorization in B ---> V gamma decays  

SciTech Connect

The factorization properties of the radiative decays B {yields} V{gamma} are analyzed at leading order in 1/m{sub b} using the soft-collinear effective theory. It is shown that the decay amplitudes can be expressed in terms of a B {yields} V form factor evaluated at q{sup 2} = 0, light-cone distribution amplitudes of the B and V mesons, and calculable hard-scattering kernels. The renormalization-group equations in the effective theory are solved to resum perturbative logarithms of the different scales in the decay process. Phenomenological implications for the B {yields} K*{gamma} branching ratio, isospin asymmetry, and CP asymmetries are discussed, with particular emphasis on possible effects from physics beyond the Standard Model.

Becher, Thomas; /Fermilab; Hill, Richard J.; /SLAC; Neubert, Matthias; /Cornell U., LEPP

2005-03-01T23:59:59.000Z

454

Rare K decays: Challenges and Perspectives  

E-Print Network (OSTI)

At this stage of the LHC program, the prospect for a new physics signal in the very rare K ---> pi nu nu bar decays may be dented, but remains well alive thanks to their intrinsic qualities. First, these decays are among the cleanest observables in the quark flavor sector. When combined with their terrible suppression in the Standard Model, they thus offer uniquely sensitive probes. Second, the LHC capabilities are not ideal for all kinds of new physics, even below the TeV scale. For example, rather elusive scenarios like natural-SUSY-like hierarchical spectrum, baryon number violation, or new very light but very weakly interacting particles may well induce deviations in rare K decays. Even though experimentalists should brace themselves for tiny deviations, these modes thus have a clear role to play in the LHC era.

Christopher Smith

2014-09-22T23:59:59.000Z

455

Correlations and the neutrinoless double beta decay  

Science Journals Connector (OSTI)

We explore the influence of the deformation on the nuclear matrix elements of the neutrinoless double beta decay (NME) concluding that the difference in deformation ?or more generally on the amount of quadrupole correlations? between parent and grand daughter nuclei quenchs strongly the decay. We discuss how varies the nuclear matrix element of 76 Ge decay when the wave functions of the two nuclei involved in the transition are constrained to reproduce the experimental occupancies. In the Interacting Shell Model description the value of the NME is enhanced about 15% compared to previous calculations whereas in the QRPA the NME’s are reduced by 20%–30% thus the discrepancies between both approaches diminish.

J. Menéndez; A. Poves; E. Caurier; F. Nowacki

2009-01-01T23:59:59.000Z

456

Factorization in B to V gamma Decays  

SciTech Connect

The factorization properties of the radiative decays B {yields} V{gamma} are analyzed at leading order in 1/mb using the soft-collinear effective theory. It is shown that the decay amplitudes can be expressed in terms of a B {yields} V form factor evaluated at q{sup 2} = 0, light-cone distribution amplitudes of the B and V mesons, and calculable hard-scattering kernels. The renormalization-group equations in the effective theory are solved to resume perturbative logarithms of the different scales in the decay process. Phenomenological implications for the B {yields} K*{gamma} branching ratio, isospin asymmetry, and CP asymmetries are discussed, with particular emphasis on possible effects from physics beyond the Standard Model.

Becher, T

2005-03-28T23:59:59.000Z

457

Time reversal invariance - a test in free neutron decay  

SciTech Connect

Time reversal invariance violation plays only a small role in the Standard Model, and the existence of a T-violating effect above the predicted level would be an indication of new physics. A sensitive probe of this symmetry in the weak interaction is the measurement of the T-violating ''D''-correlation in the decay of free neutrons. The triple-correlation D{sigma}{sub n}{center_dot}p{sub e} x p{sub v} involves three kinematic variables, the neutron spin, electron momentu, and neutrino (or proton) momentum, and changes sign under time reversal. This experiment detects the decay products of a polarized cold neutron beam with an octagonal array of scintillation and solid-state detectors. Data from first run at NIST's Cold Neutron Research Facility give a D-coefficient of -0.1 {+-} 1.3(stat.) {+-} 0.7(syst) x 10{sup -3}. This measurement has the greatest bearing on extensions to the Standard model that incorporate leptoquarks, although exotic fermion and lift-right symmetric models also allow a D as large as the present limit.

Lising, Laura J.

1999-05-18T23:59:59.000Z

458

EFFECT OF TRITIUM AND DECAY HELIUM ON WELDMENT FRACTURE TOUGHNESS  

SciTech Connect

The fracture toughness data collected in this study are needed to assess the long-term effects of tritium and its decay product on tritium reservoirs. The results show that tritium and decay helium have negative effects on the fracture toughness properties of stainless steel and its weldments. The data and report from this study has been included in a material property database for use in tritium reservoir modeling efforts like the Technology Investment Program ''Lifecycle Engineering for Tritium Reservoirs''. A number of conclusions can be drawn from the data: (1) For unexposed Type 304L stainless steel, the fracture toughness of weldments was two to three times higher than the base metal toughness. (2) Tritium exposure lowered the fracture toughness properties of both base metals and weldments. This was characterized by lower J{sub Q} values and lower J-da curves. (3) Tritium-exposed-and-aged base metals and weldments had lower fracture toughness values than unexposed ones but still retained good toughness properties.

Morgan, M; Scott West, S; Michael Tosten, M

2006-09-26T23:59:59.000Z

459

Atmos. Chem. Phys., 10, 89698982, 2010 www.atmos-chem-phys.net/10/8969/2010/  

E-Print Network (OSTI)

of uniform radon flux density. 1 Introduction Radon-222, or radon, is a radioactive noble gas which is ex- haled by soil and rock to the atmosphere. Radioactive decay is the only significant removal process, so

Meskhidze, Nicholas

460

Nonfactorization in Cabibbo-favored B decays  

Science Journals Connector (OSTI)

We assume universal values for the color-singlet (?1) and color-octet (?8) nonfactorization parameters in B decays. Two sets of color-favored processes and one set of color-suppressed processes were used to give quantitative estimates of these parameters. It has been found (by calculating the branching ratios for a large number of Cabibbo-favored B decays) that the values ?1(?0)=-0.06±0.03 and ?8(?0)=0.12±0.02 improve significantly the predictions of the factorization model.

F. M. Al-Shamali and A. N. Kamal

1999-02-10T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

One-particle inclusive semileptonic B decays  

Science Journals Connector (OSTI)

We propose a method for a QCD based calculation of one-particle inclusive decays of the form B?D¯X or B?D*X. It is based on the heavy mass limit and a short distance expansion of the amplitudes, which yield a power series in the parameter 1/MX2 for the spectra and in ?QCDmb/(mb-mc)2 for the rates. We study the leading term of this expansion for the case of the semileptonic decays B?D¯Xl+?.

Christopher Balzereit and Thomas Mannel

1998-12-22T23:59:59.000Z

462

On the neutrinoless double ?{sup +}/EC decays  

SciTech Connect

The neutrinoless double positron-emission/electron-capture (0??{sup +}/EC) decays are studied for the magnitudes of the involved nuclear matrix elements (NMEs). Decays to the ground state, 0{sub gs}{sup +}, and excited 0{sup +} states are discussed. The participant many-body wave functions are evaluated in the framework of the quasiparticle random-phase approximation (QRPA). Effective, G-matrix-derived nuclear forces are used in realistic single-particle model spaces. The channels ?{sup +}?{sup +}, ?{sup +}EC, and the resonant neutrinoless double electron capture (R0?ECEC) are discussed.

Suhonen, Jouni [Department of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä (Finland)

2013-12-30T23:59:59.000Z

463

Fission decay in intermediate heavy ion reactions  

SciTech Connect

Results are presented on cross sections, parallel and perpendicular momentum transfers, charge loss and velocity systematics for fission following reactions of Fe and Nb projectiles at 50--100 MeV/A on targets of Ta, Au, and Th. The results at 100 MeV/A are compared to a detailed multistage deexcitation model. The initial collision is modeled with an intranuclear cascade. The resultant excited target residues then undergo a fast preequilibrium decay stage followed by a statistical decay involving nucleon evaporation and fission. Results from this modeling are in reasonable agreement with experimental data. 14 refs., 11 figs.

Britt, H.C.

1990-10-03T23:59:59.000Z

464

Decay study of Inm104,g  

Science Journals Connector (OSTI)

The Ing104 and Inm104 nuclei have been produced by means of the following reactions: Cd106(p,3n), Mo92(14N,2n), Mo92(16O,p3n), Mo92(20Ne,3p5n). Their decay has been investigated after mass separation. From ?+, ?, and x direct spectra and ?-?-T, ?-x-T, and ?-?-T coincidences, a Cd104 level scheme has been constructed. The observation of an intense background of statistical ? rays, emitted after strong ? decay to high energy levels, resolves the problems of previously published work concerning ?-ray intensities, spin determinations, and QEC values.

J. Vanhorenbeeck; E. Coenen; P. Decrock; P. Dendooven; K. Deneffe; M. Huyse; G. Reusen; P. Van Duppen; J. Wauters; P. del Marmol

1989-04-01T23:59:59.000Z

465

A1-?-? System and ??l?? Decay  

Science Journals Connector (OSTI)

It is pointed out that an accurate experimental determination of the ratio r of the structure-dependent axial-vector to the vector contribution in ??l?? decay can settle the question of subtraction in the dispersion relation for the relevant amplitude which determines the axial-vector contribution in this decay, as well as in the electromagnetic form factor of the pion. Further, it is shown that the value of r is sensitive to the value of the parameter ? which enters into the A1-?-? system for theoretical determination of the A1??? and ??2? widths.

Riazuddin and Fayyazuddin

1968-07-25T23:59:59.000Z

466

BaBar: Rare Charmless B Decays  

SciTech Connect

Three two body and two resonance decays of the B mesons have been measured using data from the BABAR detector: B{sup 0} {yields} {pi}{sup {+-}}, K{sup {-+}}, K{sup +}K{sup -}, K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} and B{sup 0} {yields} a{sub 1}{sup +}(1260){pi}{sup -}. The branching ratio and that of some intermediate resonances are presented along with the Cp asymmetry of the decay B{sup 0} {yields} K*{sup +}{pi}{sup -}.

Hutchcroft, D.; /Liverpool U.

2006-04-14T23:59:59.000Z

467

Electromagnetic corrections to pseudoscalar decay constants  

E-Print Network (OSTI)

The effects of electromagnetic interactions on pseudoscalar decay constants are investigated. Using a compact QED and QCD action we are able to resolve differences of about 0.1 MeV. We obtain the preliminary results f_pi^0-f_pi^+/- =0.09(3) MeV and f_D^0-f_D^+/- =0.79(11) MeV for light and charmed pseudoscalar decay constants on a N_f=2 nonperturbatively improved Sheikholeslami-Wohlert ensemble.

Benjamin Glaessle; Gunnar S. Bali

2011-11-16T23:59:59.000Z

468

Neutrinoless double beta decay and neutrino masses  

Science Journals Connector (OSTI)

Neutrinoless double beta decay (0???) is a promising test for lepton number violating physics beyond the standard model (SM) of particle physics. There is a deep connection between this decay and the phenomenon of neutrino masses. In particular we will discuss the relation between 0??? and Majorana neutrino masses provided by the so-called Schechter-Valle theorem in a quantitative way. Furthermore we will present an experimental cross check to discriminate 0??? from unknown nuclear background using only one isotope i.e. within one experiment.

Michael Duerr

2012-01-01T23:59:59.000Z

469

Nuclear Structure and Decay Data: Current Status and Future Perspectives  

Science Journals Connector (OSTI)

The nuclear structure databases provide physicists around the world with a useful collection of reliable and well documented datasets. The Evaluated Nuclear Structure Data File (ENSDF) database produced by the International Nuclear Structure and Decay Data Network (NSDD) under the auspices of the International Atomic Energy Agency (IAEA) contains evaluated experimental information for all known nuclei. The bibliographical database Nuclear Science References (NSR) provides references to published data in the field of Nuclear Physics. The Experimental Unevaluated Nuclear Data List (XUNDL) provides a method for rapid access to formatted (compiled) data from recently published articles. Detailed information regarding these databases as well as other products and services can be found at the National Nuclear Data Center (NNDC) and IAEA web portals.

Filip G. Kondev; Jagdish K. Tuli; International Nuclear Structure and Decay Data Network

2006-01-01T23:59:59.000Z

470

Neutrinoless double beta decay in deformed nuclei: its implications in particle and nuclear physics .  

E-Print Network (OSTI)

??In my thesis, we calculated the Nuclear Matrix Elements (NME) for neutrinoless double beta decay (0??? decay). Neutrinoless double beta decay is a rare nuclear… (more)

Fang, DongLiang

2011-01-01T23:59:59.000Z

471

The use of radon (Rn-222) and volatile organic compounds in monitoring soil gas to localize NAPL contamination at a gas station in Rio Claro, São Paulo State, Brazil  

Science Journals Connector (OSTI)

Abstract This study focuses on the presence of radon (222Rn) and volatile organic compounds (VOCs) in soil gases at a gas station located in the city of Rio Claro, São Paulo, Brazil, where a fossil fuel leak occurred. The spatial distribution results show a correlation between 222Rn and VOCs, consistent with the fact that radon gas has a greater chemical affinity with organic phases than with water. This finding demonstrates that the presence of a residual hydrocarbon phase in an aquifer can retain radon, leading to a reduced radon content in the soil gas. The data in this study confirm the results of previous investigations, in which the method used in this study provided a preliminary fingerprint of a contaminated area. Furthermore, the data analysis time is brief, and only simple equipment is required.

E.Q. Barbosa; J.A. Galhardi; D.M. Bonotto

2014-01-01T23:59:59.000Z

472

CP violation in charged-kaon decay  

Science Journals Connector (OSTI)

The CP-violating asymmetry [?(K+??+?+?-) -?(K-??-?-?+)]/[? (K+??+?+?-)+?(K- ??-?-?+)] is determined by CP violation in kaon decay amplitudes. We derive an expression for this asymmetry in the standard six-quark model including CP violation from both strong and electromagnetic penguin-type diagrams.

B. Grinstein; Soo-Jong Rey; Mark B. Wise

1986-03-01T23:59:59.000Z

473

Nuclear physics aspects of double beta decay  

E-Print Network (OSTI)

Comprehensive description of the phenomenology of the $\\beta\\beta$ decay is given, with emphasis on the nuclear physics aspects. After a brief review of the neutrino oscillation results and of motivation to test the lepton number conservation, the mechanism of the $0\

Petr Vogel

2008-07-15T23:59:59.000Z

474

Radioactivity: Olympic Games: dirty and decaying?  

Science Journals Connector (OSTI)

Radioactivity: Olympic Games: dirty and decaying? Awards: SciCast rewards the best in scientific short films Conference: Teachers conference is big in Boston Workshop: Experts and teachers mingle in Mexico Awards: Olympiad holds lavish ceremony Cinema: Indiana Jones has a skull full of physics Conference: ESERA announces Turkish delight for 2009 Forthcoming Events

475

Muon decay in a laser field  

Science Journals Connector (OSTI)

We investigate the change in the decay rate of a muon caused by embedding it in the field of a laser. A previous paper found that the change could be large, as much as an order of magnitude. We find the more intuitive result that the change is small and give analytic expressions for the small corrections.

Duane A. Dicus; Arsham Farzinnia; Wayne W. Repko; Todd M. Tinsley

2009-01-12T23:59:59.000Z

476

Neutrinoless Double $?$-Decay: Status and Future  

E-Print Network (OSTI)

A brief summary of the status of neutrino masses, mixing and oscillations is presented. Neutrinoless double $\\beta$-decay is considered. Predictions for the effective Majorana mass are reviewed. A possible test of the calculations of nuclear matrix elements of the $0\

S. M. Bilenky

2005-09-11T23:59:59.000Z

477

Study of Michel spectrum of tau decay  

E-Print Network (OSTI)

This thesis is the beginning of a larger project to use BaBar to examine weak couplings through leptonic [tau] decay. I will use the ratio of Br... and Br... and the Michel parameters [rho] and [eta]. which describe the ...

Ackerman, Nicole (Nicole L.)

2007-01-01T23:59:59.000Z

478

Search for rare and forbidden eta ' decays  

E-Print Network (OSTI)

We have searched for rare and forbidden decays of the eta' meson in hadronic events at the CLEO II detector. The search is conducted on 4.80 fb(-1) of e(+)e(-) collisions at 10.6 GeV center-of-mass energy at the Cornell Electron Storage Ring. We...

Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Davis, Robin E. P.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan; Zhou, X.

2000-01-01T23:59:59.000Z

479

Search for neutrinoless ? decays: ??e? and ????  

E-Print Network (OSTI)

A search for the lepton-family-number-violating decays ??e? and ???? has been performed using CLEO II data. No evidence of a signal has been found and the corresponding upper limits are B(??e?)<2.7×10(-6) and B(????)<3.0×10(-6) at 90% C.L....

Baringer, Philip S.

1997-04-01T23:59:59.000Z

480

O?[]O? nuclear ?-decay of ?²Ga  

E-Print Network (OSTI)

The branching ratio for the ?-Decay of ?²Ga to the first excited O? state in ?²Zn has been measured. It is possible to use this branching ratio to test the theoretical method of calculating the [] component of the charge correction term [], which...

Hyman, Bruce Carl

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "radon decay products" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Neutrinoless Double Beta Decay and ??Mass Determination  

Science Journals Connector (OSTI)

The search for Neutrinoless Double Beta Decay could improve our knowledge on neutrino properties. After a brief discussion on the implications of the observation of this rare process I will introduce the experimental approaches and review the prospects of the search for this nuclear transition.

M. Pedretti

2005-01-01T23:59:59.000Z

482

Development of a combined model of tissue kinetics and radiation response of human bronchiolar epithelium with single cell resolution  

E-Print Network (OSTI)

cells of the airways due to internal exposure to alpha-particle emitters, e.g. radon. Inhalation of radon, a colorless and odorless gas, one of the products of the decay of uranium which occurs naturally in the earth?s crust, is the second major cause... epithelial tissue plays an important role in normal lung physiology. square4 lung epithelia are target tissues for occupational internal exposures and for radon exposure (26); square4 the epithelium of bronchioles appears to be the origin...

Ostrovskaya, Natela Grigoryevna

2006-10-30T23:59:59.000Z

483

Measuring CP violation in 3- and 4-body decays  

E-Print Network (OSTI)

Multibody charm decays have a rich phenomenology and potentially unique sensitivity to CP violation. In these proceedings we discuss recent results, challenges and prospects in searches for CP violation in three and four body charm decays.

Jonas Rademacker

2013-12-17T23:59:59.000Z

484

Leptonic $D_s$ decays at $B$-factories  

E-Print Network (OSTI)

We review recent measurements of leptonic $D_s$-meson decays performed by Belle and BaBar collaborations. Described measurements enable experimental extraction of the $D_s$-meson decay constant which can be compared with lattice QCD calculations.

A. Zupanc

2013-01-30T23:59:59.000Z

485

Sensitivity of CUORE to Neutrinoless Double-Beta Decay  

E-Print Network (OSTI)

Sensitivity of CUORE to Neutrinoless Double-Beta Decay b c,:Results of the Search for Neutrinoless D o u b l e - B e t ah e i n a , Evidence for neutrinoless double beta decay, M o

Alessandria, F.

2013-01-01T23:59:59.000Z

486

A Search for Neutrinoless Double Beta Decay of Te-130  

E-Print Network (OSTI)

Bolometric experiments for neutrinoless double beta 3.2.1A Search for Neutrinoless Double Beta Decay of Te by AdamSpring 2010 A Search for Neutrinoless Double Beta Decay of

Bryant, Adam Douglas

2010-01-01T23:59:59.000Z

487

/ Search for Neutrinoless Double Beta Decay with CUORE  

E-Print Network (OSTI)

neutrinoless double beta decay (??0?) in 130 Te and other rare processes. The observation of ??0? would

Elena Ferri

488

CP violation in fermion pair decays of neutral boson particles  

Science Journals Connector (OSTI)

We study CP violation in fermion pair decays of neutral boson particles with spin 0 or 1. We study a new asymmetry to measure CP violation in ?, KL??+?- decays and discuss the possibility of measuring it experimentally. For the spin-1 particles case, we study CP violation in the decays of J/? to SU(3) octet baryon pairs. We show that these decays can be used to put stringent constraints on the electric dipole moments of ?, ?, and ?.

Xiao-Gang He; J. P. Ma; Bruce McKellar

1994-05-01T23:59:59.000Z

489

CP violation for neutral charmed meson decays into CP eigenstates  

Science Journals Connector (OSTI)

The CP asymmetries for the decays of the neutral charmed meson into CP eigenstates are carefully studied. Formulas and numerical...

Dong-Sheng Du

2007-04-01T23:59:59.000Z

490

Hadronic B_u and B_d decays  

E-Print Network (OSTI)

I present latest measurements from the B factories of branching fractions for B meson decays to hadronic two- and three-body final states. These include the rate of doubly Cabibbo-suppressed charge states of charmed mesons in two-body decays, charmed baryons and other structure seen in baryonic B decays, and charmless mesonic two-body decays in comparison with estimates from theory.

W. T. Ford

2008-10-02T23:59:59.000Z

491

Search for neutrinoless decays of the tau lepton  

E-Print Network (OSTI)

. The upper limits obtained for 22 decay branching fractions are several times more stringent than those set previously....

Ammar, Raymond G.; Ball, S.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Copty, N.; Davis, Robin E. P.; Hancock, N.; Kelly, M.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan; Lam, H.

1994-10-01T23:59:59.000Z

492

Threshold resummed spectra in semi-inclusive B decays  

E-Print Network (OSTI)

I discuss some aspects of the universality of soft gluon dynamics in semileptonic and radiative decays at the threshold region.

Giulia Ricciardi

2006-07-05T23:59:59.000Z

493

Search for Invisibly Decaying Higgs Bosons with Large Decay Width Using the OPAL Detector at LEP  

E-Print Network (OSTI)

This paper describes a topological search for an invisibly decaying Higgs boson,H, produced via the Bjorken process (e+e- -> HZ). The analysis is based on data recorded using the OPAL detector at LEP at centre-of-mass energies from 183 to 209 GeV corresponding to a total integrated luminosity of 629pb-1. In the analysis only hadronic decays of the Z boson are considered. A scan over Higgs boson masses from 1 to 120 GeV and decay widths from 1 to 3000 GeV revealed no indication for a signal in the data. From a likelihood ratio of expected signal and Standard Model background we determine upper limits on cross-section times branching ratio to an invisible final state. For moderate Higgs boson decay widths, these range from about 0.07pb Mh = 60GeV) to 0.57pb (Mh = 114GeV). For decay widths above 200GeV the upper limits are of the order of 0.15pb. The results can be interpreted in general scenarios predicting a large invisible decay width of the Higgs boson. As an example we interpret the results in the so-called stealthy Higgs scenario. The limits from this analysis exclude a large part of the parameter range of this scenario experimentally accessible at LEP2.

The OPAL collaboration

2006-10-18T23:59:59.000Z

494

Effect of resonance decays on hadron elliptic flows  

E-Print Network (OSTI)

Within the quark coalescence model, we study effects of resonance decays, and of the quark momentum distribution in hadrons, on the elliptic flows of stable hadrons. We find that, with the exception of rho-meson decays, the resonance decays could...

Greco, V.; Ko, Che Ming.

2004-01-01T23:59:59.000Z

495

The Majorana Neutrinoless Double-Beta Decay Experiment  

E-Print Network (OSTI)

The Majorana Neutrinoless Double-Beta Decay Experiment Pre-conceptual Design Proposal November 22 Motivation for Neutrinoless Double-Beta Decay Experiments . . . . . . . . . 4 2.1.1 Community Guidance Neutrinoless Double-Beta Decay Results . . . . . . . . . . . . . . . . . . . . 12 2.5 Next

Washington at Seattle, University of - Department of Physics, Electroweak Interaction Research Group

496

Sensitivity of CUORE to Neutrinoless Double-Beta Decay  

E-Print Network (OSTI)

of CUORE to Neutrinoless Double-Beta Decay b c,:L d e f F .s t results on neutrinoless double beta decay of T e w i t hthe study of neutrinoless double beta decay, J . C r y s t .

Alessandria, F.

2013-01-01T23:59:59.000Z

497

E-Print Network 3.0 - alpha-emitters radon lung Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Health- Publications and Products Collection: Environmental Sciences and Ecology 4 REPORT NO. 8 radiation hazards Summary: precludesdrawing definite conclusions from them....

498

7/3/08 6:50 AMBuzzword: Radon: Consumer Reports Home & Garden Blog Page 1 of 3http://blogs.consumerreports.org/home/2008/06/radon-counters.html#comments  

E-Print Network (OSTI)

that results from the natural decay of uranium in soil and rock. The gas moves up from the ground and can. A professor of geology at the University of Akron tested 52 samples of the most popular granites used

Llope, William J.

499

APT radionuclide production experiment  

SciTech Connect

Tritium ({sup 3}H, a heavy isotope of hydrogen) is produced by low energy neutron-induced reactions on various elements. One such reaction is n+{sup 3}He {yields}>{sup 3}H+{sup 1}H in which {sup 3}He is transmuted to tritium. Another reaction, which has been used in reactor production of tritium, is the n+{sup 6}Li {yields}> {sup 3}H+{sup 4}He reaction. Accelerator Production of Tritium relies on a high-energy proton beam to produce these neutrons using the spallation reaction, in which high-energy proton beam to produce these neutrons using the spallation reaction, in which high-energy protons reacting with a heavy nucleus produce a shower of low-energy neutrons and a lower-mass residual nucleus. It is important to quantify the residual radionuclides produced in the spallation target for two reasons. From an engineering point of view, one must understand short-lived isotopes that may contribute to decay heat. From a safety viewpoint, one must understand what nuclei and decay gammas are produced in order to design adequate shielding, to estimate ultimate waste disposal problems, and to predict possible effects due to accidental dispersion during operation. The authors have performed an experiment to measure the production of radioisotopes in stopping-length W and Pb targets irradiated by a 800 MeV proton beam, and are comparing the results to values obtained from calculations using LAHET and MCNP. The experiment was designed to pay particular attention to the short half-life radionuclides, which have not been previously measured. In the following, they present details of the experiment, explain how they analyzed the data and obtain the results, how they perform the calculations, and finally, how the experimental data agree with the calculations.

Ullmann, J.L.; Gavron, A.; King, J.D. [and others

1994-07-02T23:59:59.000Z

500

Search for Single Top Quark Production at HERA  

E-Print Network (OSTI)

A search for single top quark production is performed in the full ep data sample collected by the H1 experiment at HERA, corresponding to an integrated luminosity of 474 pb^-1. Decays of top quarks into a b quark and a W boson with subsequent leptonic or hadronic decay of the W are investigated. A multivariate analysis is performed to discriminate top quark production from Standard Model background processes. An upper limit on the top quark production cross section via flavour changing neutral current processes sigma (ep -> etX) < 0.25 pb is established at 95% CL. Limits on the anomalous coupling kappa_{tu gamma} are derived.

Aaron, F D; Alexa, C; Alimujiang, K; Andreev, V; Antunovic, B; Asmone, A; Backovic, S; Baghdasaryan, A; Barrelet, E; Bartel, W; Begzsuren, K; Belousov, A; Bizot, J C; Boudry, V; Bozovic-Jelisavcic, I; Bracinik, J; Brandt, G; Brinkmann, M; Brisson, V; Bruncko, D; Bunyatyan, A; Buschhorn, G; Bystritskaya, L; Campbell, A J; Cantun Avila, K B; Cassol-Brunner, F; Cerny, K; Cerny, V; Chekelian, V; Cholewa, A; Contreras, J G; Coughlan, J A; Cozzika, G; Cvach, J; Dainton, J B; Daum, K; Deak, M; de Boer, Y; Delcourt, B; Del Degan, M; Delvax, J; De Roeck, A; De Wolf, E A; Diaconu, C; Dodonov, V; Dossanov, A; Dubak, A; Eckerlin, G; Efremenko, V; Egli, S; Eliseev, A; Elsen, E; Falkiewicz, A; Favart, L; Fedotov, A; Felst, R; Feltesse, J; Ferencei, J; Fischer, D J; Fleischer, M; Fomenko, A; Gabathuler, E; Gayler, J; Ghazaryan, S; Glazov, A; Glushkov, I; Goerlich, L; Gogitidze, N; Gouzevitch, M; Grab, C; Greenshaw, T; Grell, B R; Grindhammer, G; Habib, S; Haidt, D; Helebrant, C; Henderson, R C W; Hennekemper, E; Henschel, H; Herbst, M; Herrera, G; Hildebrandt, M; Hiller, K H; Hoffmann, D; Horisberger, R; Hreus, T; Jacquet, M; Janssen, M E; Janssen, X; Jonsson, L; Jung, Andreas Werner; Jung, H; Kapichine, M; Katzy, J; Kenyon, I R; Kiesling, C; Klein, M; Kleinwort, C; Kluge, T; Knutsson, A; Kogler, R; Kostka, P; Kraemer, M; Krastev, K; Kretzschmar, J; Kropivnitskaya, A; Kruger, K; Kutak, K; Landon, M P J; Lange, W; Lastovicka-Medin, G; Laycock, P; Lebedev, A; Leibenguth, G; Lendermann, V; Levonian, S; Li, G; Lipka, K; Liptaj, A; List, B; List, J; Loktionova, N; Lopez-Fernandez, R; Lubimov, V; Lytkin, L; Makankine, A; Malinovski, E; Marage, P; Marti, Ll; Martyn, H U.; Maxfield, S J; Mehta, A; Meyer, A B; Meyer, H; Meyer, H; Meyer, J; Michels, V; Mikocki, S; Milcewicz-Mika, I; Moreau, F; Morozov, A; Morris, J V; Mozer, Matthias Ulrich; Mudrinic, M; Muller, K; Murin, P; Naumann, Th; Newman, P R; Niebuhr, C; Nikiforov, A; Nowak, G; Nowak, K; Nozicka, M; Olivier, B; Olsson, J E; Osman, S; Ozerov, D; Palichik, V; Panagoulias, I; Pandurovic, M; Papadopoulou, Th; Pascaud, C; Patel, G D; Pejchal, O; Perez, E; Petrukhin, A; Picuric, I; Piec, S; Pitzl, D; Placakyte, R; Pokorny, B; Polifka, R; Povh, B; Preda, T; Radescu, V; Rahmat, A J; Raicevic, N; Raspiareza, A; Ravdandorj, T; Reimer, P; Rizvi, E; Robmann, P; Roland, B; Roosen, R; Rostovtsev, A; Rotaru, M; Ruiz Tabasco, J E; Rurikova, Z; Rusakov, S; Salek, D; Sankey, D P C; Sauter, M; Sauvan, E; Schmitt, S; Schmitz, C; Schoeffel, L; Schoning, A; Schultz-Coulon, H C; Sefkow, F; Shaw-West, R N; Shtarkov, L N; Shushkevich, S; Sloan, T; Smiljanic, Ivan; Soloviev, Y; Sopicki, P; South, D; Spaskov, V; Specka, Arnd E; Staykova, Z; Steder, M; Stella, B; Stoicea, G; Straumann, U.; Sunar, D; Sykora, T; Tchoulakov, V; Thompson, G; Thompson, P D; Toll, T; Tomasz, F; Tran, T H; Traynor, D; Trinh, T N; Truol, P; Tsakov, I; Tseepeldorj, B; Turnau, J; Urban, K; Valkarova, A; Vallee, C; Van Mechelen, P; Vargas Trevino, A; Vazdik, Y; Vinokurova, S; Volchinski, V; von den Driesch, M; Wegener, D; Wissing, Ch; Wunsch, E; Zacek, J; Zalesak, J; Zhang, Z; Zhokin, A; Zimmermann, T; Zohrabyan, H; Zomer, F; Zus, R; 10.1016/j.physletb.2009.06.057

2009-01-01T23:59:59.000Z