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Note: This page contains sample records for the topic "alpha excluding radon" 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

Automatically processed alpha-track radon monitor  

DOE Patents [OSTI]

An automatically processed alpha-track radon monitor is provided which includes a housing having an aperture allowing radon entry, and a filter that excludes the entry of radon daughters into the housing. A flexible track registration material is located within the housing that records alpha-particle emissions from the decay of radon and radon daughters inside the housing. The flexible track registration material is capable of being spliced such that the registration material from a plurality of monitors can be spliced into a single strip to facilitate automatic processing of the registration material from the plurality of monitors. A process for the automatic counting of radon registered by a radon monitor is also provided.

Langner, G.H. Jr.

1993-01-12T23:59:59.000Z

2

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

E-Print Network [OSTI]

RADIATIOh RESEARCH 142,61-69 (1995) The Biological Effectiveness of Radon-ProgenyAlpha Particles., Huang, Y. and Hall, E. J. The Biological Effectiveness of Radon-Progeny Alpha Particles. 111. Quality estimates of values appropriate for the quality factor for radon progeny are significantly lower than those

Brenner, David Jonathan

3

A RESIDENTIAL RADON DAUGHTER MONITOR BASED ON ALPHA SPECTROSCOPY  

E-Print Network [OSTI]

send , "Measurement of Radon Progeny Concentration in Air bymeasuring concentrations of radon progeny i n indoor a i r .

Nazaroff, William W.

2010-01-01T23:59:59.000Z

4

A New Mechanism for DNA Alterations Induced by Alpha Particles Such as Those Emitted by Radon and Radon Progeny  

E-Print Network [OSTI]

The mechanism(s) by which alpha (a) particles like those emitted from inhaled radon and radon progeny cause their carcinogenic effects in the lung remains unclear. Although direct nuclear traversals by a-particles may be involved in mediating these outcomes, increasing evidence indicates that a particles can cause alterations in DNA in the absence of direct hits to cell nuclei. Using the occurrence of excessive sister chromatid exchanges (SCE) as an index of DNA damage in human lung fibroblasts, we investigated the hypothesis that a-particles may induce DNA damage through the generation of extracellular factors. We have found that a relatively low dose of a-particles can result in the generation of extracellular factors, which, upon transfer to unexposed normal human cells, can cause excessive SCE to an extent equivalent to that observed when the cells are directly irradiated with the same irradiation dose. A short-lived, SCEinducing factor(s) is generated in a-irradiated culture medium containing serum in the absence of cells. A more persistent SCE-inducing factor(s), which can survive freeze-thaw and is heat labile is produced by fibroblasts after exposure to the a-particles. These results indicate that the initiating target for a-particle-induced genetic changes can be larger than a cell's nucleus or even a whole cell. How transmissible factors like those observed here in vitro may extend to the in vivo condition in the context of a-particle-induced carcinogenesis in the respiratory tract remains to be determined. Environ Health Perspect 1 05(Suppl 5):1095-1101 (1997) Key words: alpha particles, radon/radon progeny, indirect radiation effects, high LET radiation,

Bruce E. Lehnert; Edwin H. Goodwin

5

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

E-Print Network [OSTI]

progeny (usually about 0.5). This forms the base for determining the exposure to radon progeny expressed methods for long-term passive measure- ments of radon progeny concentrations, despite that short

Yu, K.N.

6

Influence of Magnolol on the bystander effect induced by alpha-particle irradiation  

E-Print Network [OSTI]

. Introduction Alpha particles emitted from radon and radon progeny contribute the main part of the natural

Yu, K.N.

7

Radon detection  

DOE Patents [OSTI]

A detector for atmospheric radon using a long range alpha detector as its sensing element is described. An electrostatic filter removes ions from ambient air, while allowing radon atoms to pass into a decay cavity. Here, radon atoms are allowed to decay, creating air ions. These air ions are drawn by a fan through a second electrostatic filter which can be activated or deactivated, and into the long range alpha detector. With the second electrostatic filter activated, no air ions are allowed to pass, and the signal output from the long range alpha detector consists of only the electronic background. With the second electrostatic filter deactivated, air ions and cosmic rays will be detected. The cosmic ray contribution can be minimized by shielding. 3 figures.

MacArthur, D.W.; Allander, K.S.; Bounds, J.A.

1994-01-25T23:59:59.000Z

8

I. Excluded Volume Effects in Ising Cluster Distributions and Nuclear Multifragmentation II. Multiple-Chance Effects in Alpha-Particle Evaporation  

SciTech Connect (OSTI)

In Part 1, geometric clusters of the Ising model are studied as possible model clusters for nuclear multifragmentation. These clusters may not be considered as non-interacting (ideal gas) due to excluded volume effect which predominantly is the artifact of the cluster's finite size. Interaction significantly complicates the use of clusters in the analysis of thermodynamic systems. Stillinger's theory is used as a basis for the analysis, which within the RFL (Reiss, Frisch, Lebowitz) fluid-of-spheres approximation produces a prediction for cluster concentrations well obeyed by geometric clusters of the Ising model. If thermodynamic condition of phase coexistence is met, these concentrations can be incorporated into a differential equation procedure of moderate complexity to elucidate the liquid-vapor phase diagram of the system with cluster interaction included. The drawback of increased complexity is outweighted by the reward of greater accuracy of the phase diagram, as it is demonstrated by the Ising model. A novel nuclear-cluster analysis procedure is developed by modifying Fisher's model to contain cluster interaction and employing the differential equation procedure to obtain thermodynamic variables. With this procedure applied to geometric clusters, the guidelines are developed to look for excluded volume effect in nuclear multifragmentation. In part 2, an explanation is offered for the recently observed oscillations in the energy spectra of {alpha}-particles emitted from hot compound nuclei. Contrary to what was previously expected, the oscillations are assumed to be caused by the multiple-chance nature of {alpha}-evaporation. In a semi-empirical fashion this assumption is successfully confirmed by a technique of two-spectra decomposition which treats experimental {alpha}-spectra has having contributions from at least two independent emitters. Building upon the success of the multiple-chance explanation of the oscillations, Moretto's single-chance evaporation theory is augmented to include multiple-chance emission and tested on experimental data to yield positive results.

Breus, Dimitry E.

2005-05-16T23:59:59.000Z

9

ALPHA-PARTICLE RADIOBIOLOGICAL EXPERIMENTS USING THIN CR-39 DETECTORS  

E-Print Network [OSTI]

. INTRODUCTION Alpha particles from inhaled radon progeny are the most important source of irradiation

Yu, K.N.

10

SUMMER TO SUMMER VARIATIONS IN INDOOR RADON  

E-Print Network [OSTI]

Indoor radon concentrations show a strong dependence on weather. winter tends to be associated with higher than average indoor radon, and summer with lower than average. However, in northern Virginia, the summer of 1988 was wetter than the summer of 1987. Consequently, the regional indoor radon during the summer of 1988 was about 30 % higher than during the summer of 1987, and indoor radon during the summer of 1988 actually exceeded the indoor radon level of the 1987-88 winter. Evidently care must be taken when attempting to estimate regional indoor radon concentrations, and homesite risk estimates should rely on long-term measurement intervals. Key word index: summer precipitation, soil capping, alpha-track radon monitors, home heating system, radon and radon progeny,

Paul Dibenenetto; Douglas G. Mose; George W. Mushrush

11

PASSIVE RADON PROGENY DOSIMETERS: FEASIBILITY STUDIES  

E-Print Network [OSTI]

Radon progeny measurements can improve dose estimates based on radon gas measurements alone. The airborne activity-size distribution ratio affects the available dose rate per unit radon. Measurements of surface deposited alpha activity and radon concentration can be used in a semi-empirical model to estimate the equilibrium ratio, the free fraction and airborne dose rate. Since residential atmospheres are dynamic, several measurement approaches, including electret ion chamber and track registration techniques, are being studied to develop passive, integrating detectors. Preliminary tests show good correlation between surface deposited activity or energy, airborne progeny concentrations and dose rate. Tests are underway to assess the performance in other home environments.

Daniel J. Steck; David Harrison; Said Rahman; Rad Elec Inc

12

Passive environmental radon detector study  

SciTech Connect (OSTI)

There are three stages at which the ambient air concentrations of radon-222 are monitored around the Uranium Mill Tailings Remedial Action (UMTRA) Project sites: before, during, and after construction. Pre-remedial-action measurements are taken for approximately 1 year. Monitoring is conducted during the entire duration of construction, and post-remedial-action monitoring is performed for approximately 1 year. Currently, the UMTRA Project uses Radtrak{reg_sign} brand alpha-track radon detectors for these environmental measurements. The purposes of radon monitoring around the UMTRA sites are (1) to determine background values around the site and pre-remedial-action conditions, (2) to control construction activities and monitor off-site releases, and (3) to compare post-remedial-action concentrations with pre-remedial-action values to demonstrate that radon concentrations have been reduced to approximately background levels. The Technical Assistance Contractor to the DOE for the UMTRA Project evaluated the performance of four different types of passive environmental radon detectors under both controlled laboratory conditions and field conditions at an unremediated UMTRA site. This study was undertaken to evaluate the accuracy and precision of four different passive, timeintegrating, environmental radon detectors in an effort to determine which brand of detector is best suited to measure environmental outdoor radon concentrations for the UMTRA Project. Voluntary manufacturer participation in the study was solicited by placing an advertisement in the Commerce Business Daily. All manufacturers participating in the study supplied the detectors and analysis free of charge.

Not Available

1992-03-01T23:59:59.000Z

13

Passive environmental radon detector study  

SciTech Connect (OSTI)

There are three stages at which the ambient air concentrations of radon-222 are monitored around the Uranium Mill Tailings Remedial Action (UMTRA) Project sites: before, during, and after construction. Pre-remedial-action measurements are taken for approximately 1 year. Monitoring is conducted during the entire duration of construction, and post-remedial-action monitoring is performed for approximately 1 year. Currently, the UMTRA Project uses Radtrak[reg sign] brand alpha-track radon detectors for these environmental measurements. The purposes of radon monitoring around the UMTRA sites are (1) to determine background values around the site and pre-remedial-action conditions, (2) to control construction activities and monitor off-site releases, and (3) to compare post-remedial-action concentrations with pre-remedial-action values to demonstrate that radon concentrations have been reduced to approximately background levels. The Technical Assistance Contractor to the DOE for the UMTRA Project evaluated the performance of four different types of passive environmental radon detectors under both controlled laboratory conditions and field conditions at an unremediated UMTRA site. This study was undertaken to evaluate the accuracy and precision of four different passive, timeintegrating, environmental radon detectors in an effort to determine which brand of detector is best suited to measure environmental outdoor radon concentrations for the UMTRA Project. Voluntary manufacturer participation in the study was solicited by placing an advertisement in the Commerce Business Daily. All manufacturers participating in the study supplied the detectors and analysis free of charge.

Not Available

1992-03-01T23:59:59.000Z

14

A study of the polyethylene membrane used in diffusion chambers for radon gas concentration measurements  

E-Print Network [OSTI]

enhanced. This is explained by enhanced deposition of radon progeny on the outside surface of the PE these deposited radon progeny to reach the SSNTD. We will present the PE thickness which can stop the alpha

Yu, K.N.

15

The relation of seismic activity and radon concentration  

SciTech Connect (OSTI)

Radon, which is the largest source of natural ionizing radiation, reaches to surface as gas or dissolved form in the ground water. Emanation of radon can has a profile is disposed to increasing or decreasing depending on the effects of meteorological events or crust movements. In this work, the radon concentration in soil gas, which is transported from soil to AlphaGUARD, is continuously measured in Mytilene (Greece). A graph of radon concentration is prepared for comparison with simultaneous earthquake data. As a consequence of comparison, we determined that the radon concentration indicates anomalies before the earthquakes.

Kulali, Feride, E-mail: feridekulali@gmail.com, E-mail: iskender@fef.sdu.edu.tr; Akkurt, ?skender, E-mail: feridekulali@gmail.com, E-mail: iskender@fef.sdu.edu.tr [Suleyman Demirel University, Science and Art Faculty, Isparta-Turkey (Turkey); Vogiannis, Efstratios, E-mail: svog@env.aegean.gr [Department of Environmental Studies, University of the Aegean,Mytilene (Greece)

2014-10-06T23:59:59.000Z

16

Home Safety: Radon Gas  

E-Print Network [OSTI]

Every home should be tested for radon, an invisible, odorless, radioactive gas that occurs naturally. Radon is estimated to be the second leading cause of lung cancer in the United States. However, with proper equipment, radon is easy to detect... poten- tial for radon (Fig. 1), homes in Texas have been found to have radon levels that exceed U.S. Environ- mental Protection Agency (EPA) recommendations. Every home is susceptible to a radon gas problem. Health/cancer risks Radon produces...

Shaw, Bryan W.; Denny, Monica L.

1999-11-12T23:59:59.000Z

17

RADON: A BIBLIOGRAPHY  

E-Print Network [OSTI]

of uranium nine atmospheres. HASL-220 63 \\2t-W. A S R C :U. Radon flask monitor. HASL-330 17 p.. 08/-/77. ABSTRACT: Aof radon daughters. HASL-325 RADON WORKSHOP: FEBRUARY 1977.

Lepman, S.R.

2010-01-01T23:59:59.000Z

18

RADON: A BIBLIOGRAPHY  

E-Print Network [OSTI]

p. , 1971. Rodgers, J. C. Radon progeny exposure measurementH. , Abner, C. H. A new radon progeny personnel dosimeter.in buildings due to radon progeny. HEALTH PHYS. 3112): 119-

Lepman, S.R.

2010-01-01T23:59:59.000Z

19

Absorbed dose in target cell nuclei and dose conversion coefficient of radon progeny  

E-Print Network [OSTI]

Absorbed dose in target cell nuclei and dose conversion coefficient of radon progeny in the human Abstract To calculate the absorbed dose in the human lung due to inhaled radon progeny, ICRP focussed and secretory cells). The absorbed energy for alpha particles emitted by radon progeny in the human respiratory

Yu, K.N.

20

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

E-Print Network [OSTI]

half-life. Exposure to alpha emitting radon progeny is the major source of natural radiation doses to the lung (NCRP84b). Almost all of this is received indoors, where radon levels are elevated due to a trapping effect 1n the enclosed areas. Since... measure indoor radon and radon progeny levels, a suitable detection method must be developed. Charles (Ch84) designed and constructed an air grab sampling system using "scintillation flasks". There were, however, some minor problems with the system...

Vasquez, Gerard Michael

1986-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "alpha excluding radon" 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

alpha particle irradiation: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

5 Incidence characteristics of alpha particles on detectors irradiated in a radon progeny atmosphere Biology and Medicine Websites Summary: Incidence characteristics of...

22

alpha particles irradiation: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

5 Incidence characteristics of alpha particles on detectors irradiated in a radon progeny atmosphere Biology and Medicine Websites Summary: Incidence characteristics of...

23

alpha radiation detection: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

plant species. Search method: In nature, most alpha radiation exposure is caused by radon progeny. Exposure is particularly high below ground, and is also elevated on plant...

24

alpha-particle emitting radiopharmaceuticals: Topics by E-print...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

44 Incidence characteristics of alpha particles on detectors irradiated in a radon progeny atmosphere Biology and Medicine Websites Summary: Incidence characteristics of...

25

alpha particle response: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

62 Incidence characteristics of alpha particles on detectors irradiated in a radon progeny atmosphere Biology and Medicine Websites Summary: Incidence characteristics of...

26

alpha particle detector: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

K.N. 2 Incidence characteristics of alpha particles on detectors irradiated in a radon progeny atmosphere Biology and Medicine Websites Summary: Incidence characteristics of...

27

alpha particle irradiated: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

5 Incidence characteristics of alpha particles on detectors irradiated in a radon progeny atmosphere Biology and Medicine Websites Summary: Incidence characteristics of...

28

apres irradiation alpha: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Edmond 8 Incidence characteristics of alpha particles on detectors irradiated in a radon progeny atmosphere Biology and Medicine Websites Summary: Incidence characteristics of...

29

alpha radiation measuring: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

plant species. Search method: In nature, most alpha radiation exposure is caused by radon progeny. Exposure is particularly high below ground, and is also elevated on plant...

30

Event counting alpha detector  

DOE Patents [OSTI]

An electrostatic detector is disclosed for atmospheric radon or other weak sources of alpha radiation. In one embodiment, nested enclosures are insulated from one another, open at the top, and have a high voltage pin inside and insulated from the inside enclosure. An electric field is produced between the pin and the inside enclosure. Air ions produced by collision with alpha particles inside the decay volume defined by the inside enclosure are attracted to the pin and the inner enclosure. With low alpha concentrations, individual alpha events can be measured to indicate the presence of radon or other alpha radiation. In another embodiment, an electrical field is produced between parallel plates which are insulated from a single decay cavity enclosure. 6 figs.

Bolton, R.D.; MacArthur, D.W.

1996-08-27T23:59:59.000Z

31

Event counting alpha detector  

DOE Patents [OSTI]

An electrostatic detector for atmospheric radon or other weak sources of alpha radiation. In one embodiment, nested enclosures are insulated from one another, open at the top, and have a high voltage pin inside and insulated from the inside enclosure. An electric field is produced between the pin and the inside enclosure. Air ions produced by collision with alpha particles inside the decay volume defined by the inside enclosure are attracted to the pin and the inner enclosure. With low alpha concentrations, individual alpha events can be measured to indicate the presence of radon or other alpha radiation. In another embodiment, an electrical field is produced between parallel plates which are insulated from a single decay cavity enclosure.

Bolton, Richard D. (Los Alamos, NM); MacArthur, Duncan W. (Los Alamos, NM)

1996-01-01T23:59:59.000Z

32

Montana Radon Control Act (Montana)  

Broader source: Energy.gov [DOE]

The Radon Control Act regulates the emission of radon, the gaseous decay products of uranium or thorium. The Act addresses operator certification of radon-producing facilities, testing and...

33

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

E-Print Network [OSTI]

bronchial dose after deposition in the lung tissue, since the unattached radon progeny are of optimal particle size to be deposited in the tracheobronchial region of the lung. The magnitude of the unattached fraction is affected by the relative humidity... is the use of organic film that is damaged by interacting alpha particles. A track-etch detector typically consists of a small film placed inside a filtered container. The filter allows radon to diffuse into the container, but filters radon progeny entry...

Madonia, Michael Vincent

1990-01-01T23:59:59.000Z

34

National Environmental Policy Act (NEPA) Categorically Excluded...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Environmental Management System NEPA National Environmental Policy Act (NEPA) Categorically Excluded Actions National Environmental Policy Act (NEPA) Categorically Excluded...

35

RADON: A BIBLIOGRAPHY  

E-Print Network [OSTI]

is detenined by gamma spectrometry of the charcoaldaughters in air using gamma spectrometry. N U a . INSTRUM.is subjected to gamma-ray spectrometry. The radon luantitr

Lepman, S.R.

2010-01-01T23:59:59.000Z

36

alpha-particles microbeam irradiation: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

4 Incidence characteristics of alpha particles on detectors irradiated in a radon progeny atmosphere Biology and Medicine Websites Summary: Incidence characteristics of...

37

alpha-radiation construction calibration: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

plant species. Search method: In nature, most alpha radiation exposure is caused by radon progeny. Exposure is particularly high below ground, and is also elevated on plant...

38

Attachment of radon progeny to cigarette-smoke aerosols  

SciTech Connect (OSTI)

The daughter products of radon gas are now recognized as a significant contributor to radiation exposure to the general public. It is also suspected that a synergistic effect exists with the combination cigarette smoking and radon exposure. We have conducted an experimental investigation to determine the physical nature of radon progeny interactions with cigarette smoke aerosols. The size distributions of the aerosols are characterized and attachment rates of radon progeny to cigarette-smoke aerosols are determined. Both the mainstream and sidestream portions of the smoke aerosol are investigated. Unattached radon progeny are very mobile and, in the presence of aerosols, readily attach to the particle surfaces. In this study, an aerosol chamber is used to contain the radon gas, progeny and aerosol mixture while allowing the attachment process to occur. The rate of attachment is dependent on the size distribution, or diffusion coefficient, of the radon progeny as well as the aerosol size distribution. The size distribution of the radon daughter products is monitored using a graded-screen diffusion battery. The diffusion battery also enables separation of the unattached radon progeny from those attached to the aerosol particles. Analysis of the radon decay products is accomplished using alpha spectrometry. The aerosols of interest are size fractionated with the aid of a differential mobility analyzer and cascade impactor. The measured attachment rates of progeny to the cigarette smoke are compared to those found in similar experiments using an ambient aerosol. The lowest attachment coefficients observed, {approximately}10{sup {minus}6} cm{sup 3}/s, occurred for the ambient aerosol. The sidestream and mainstream smoke aerosols exhibited higher attachment rates in that order. The results compared favorably with theories describing the coagulation process of aerosols.

Biermann, A.H.; Sawyer, S.R.

1995-05-01T23:59:59.000Z

39

Radon reduction and radon monitoring in the NEMO experiment  

SciTech Connect (OSTI)

The first data of the NEMO 3 neutrinoless double beta decay experiment have shown that the radon can be a non negligible component of the background. In order to reduce the radon level in the gas mixture, it has been necessary first to cover the NEMO 3 detector with an airtight tent and then to install a radon-free air factory. With the use of sensitive radon detectors, the level of radon at the exit of the factory and inside the tent is continuously controlled. These radon levels are discussed within the NEMO 3 context.

Nachab, A. [Centre d'Etudes Nucleaires de Bordeaux Gradignan, BP 120, Le Haut Vigneau, 33175 Gradignan Cedex (France)

2007-03-28T23:59:59.000Z

40

COMPUTING EXCLUDED MINORS Isolde Adler  

E-Print Network [OSTI]

, · linklessly/knotlessly embeddable graphs · C, D minor ideals C D, C D minor ideals · C minor ideal Capex minor ideal Capex := {G | v V(G) such that G \\ v C} ISOLDE ADLER COMPUTING EXCLUDED MINORS 5/18 #12 graphs · C, D minor ideals C D, C D minor ideals · C minor ideal Capex minor ideal Capex := {G | v

Adler, Isolde

Note: This page contains sample records for the topic "alpha excluding radon" 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 the DRIFT-II directional dark matter TPC: emanation, detection and mitigation  

E-Print Network [OSTI]

Radon gas emanating from materials is of interest in environmental science and also a major concern in rare event non-accelerator particle physics experiments such as dark matter and double beta decay searches, where it is a major source of background. Notable for dark matter experiments is the production of radon progeny recoils (RPRs), the low energy (~100 keV) recoils of radon daughter isotopes, which can mimic the signal expected from WIMP interactions. Presented here are results of measurements of radon emanation from detector materials in the 1 metre cubed DRIFT-II directional dark matter gas time projection chamber experiment. Construction and operation of a radon emanation facility for this work is described, along with an analysis to continuously monitor DRIFT data for the presence of internal 222Rn and 218Po. Applying this analysis to historical DRIFT data, we show how systematic substitution of detector materials for alternatives, selected by this device for low radon emanation, has resulted in a factor of ~10 reduction in internal radon rates. Levels are found to be consistent with the sum from separate radon emanation measurements of the internal materials and also with direct measurement using an attached alpha spectrometer. The current DRIFT detector, DRIFT-IId, is found to have sensitivity to 222Rn of 2.5 {\\mu}Bq/l with current analysis efficiency, potentially opening up DRIFT technology as a new tool for sensitive radon assay of materials.

J. B. R. Battat; J. Brack; E. Daw; A. Dorofeev; A. C. Ezeribe; J. R. Fox; J. -L. Gauvreau; M. Gold; L. J. Harmon; J. L. Harton; J. M. Landers; E. R. Lee; D. Loomba; J. A. J. Matthews; E. H. Miller; A. Monte; A. StJ. Murphy; S. M. Paling; N. Phan; M. Pipe; M. Robinson; S. W. Sadler; A. Scarff; D. P. Snowden-Ifft; N. J. C. Spooner; S. Telfer; D. Walker; D. Warner; L. Yuriev

2014-08-25T23:59:59.000Z

42

VARIATION WITH EQUILIBRIUM CONDITION OF THE CALIBRATION FACTORS FOR CONTINUOUS RADON PROGENY MONITORS  

E-Print Network [OSTI]

The calibration factor for a continuous monitor that uses gross alpha-particle counting for measuring radon progeny concentration theoretically should vary as a function of the relative concentrations of the radon progeny; therefore, an inherent error is introduced by using a constant calibration factor, regardless of the equilibrium condition, as is the practice for most models of radon progeny monitor. An equation was derived describing the calibration factor as a function of the concentrations of the radon progeny and was used to calculate values of the calibration factor over the entire theoretical range of relative concentrations of radon progeny that comprise a constant collective radon progeny concentration. The results of these calculations showed that the calibration factor varies by approximately 10 % over the entire theoretical range of relative concentrations of radon progeny. The range of relative concentrations that typically exist in indoor air is a small subset of the entire range that is theoretically possible; therefore, the calibration factor varies, in practice, due to this effect by less than 10 % and the inherent error introduced by the detection and analysis method is not serious. Loss of radon progeny, particularly 218~0, due to plateout on surfaces of the monitor before the progeny are collected on the filter has the effect of lowering the value of the calibration factor. This effect can be significant at conditions of low equilibrium when the fraction of radon progeny that are unattached to aerosols in the air is increased and plateout is more likely to occur.

Phillip H. Jenkins

43

Radon: a bibliography  

SciTech Connect (OSTI)

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

44

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

SciTech Connect (OSTI)

Long-lived alpha and beta emitters in the {sup 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 Beta Cage 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 reduction at its output, from 7.470.56 to 0.370.12 Bq/m{sup 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{sup 3}.

Schnee, R. W.; Bunker, R.; Ghulam, G.; Jardin, D.; Kos, M.; Tenney, A. S. [Department of Physics, Syracuse University, Syracuse, NY 13244 (United States)] [Department of Physics, Syracuse University, Syracuse, NY 13244 (United States)

2013-08-08T23:59:59.000Z

45

Beta/alpha continuous air monitor  

DOE Patents [OSTI]

A single deep layer silicon detector in combination with a microcomputer, recording both alpha and beta activity and the energy of each pulse, distinquishing energy peaks using a novel curve fitting technique to reduce the natural alpha counts in the energy region where plutonium and other transuranic alpha emitters are present, and using a novel algorithm to strip out radon daughter contribution to actual beta counts. 7 figs.

Becker, G.K.; Martz, D.E.

1988-06-27T23:59:59.000Z

46

RADON PROGENY AS AN EXPERIMENTAL TOOL FOR DOSIMETRY OF NANOAEROSOLS  

E-Print Network [OSTI]

Measurement of Unattached Radon Progeny Deposited in theApte, M.G. 2005 Radon progeny as a potential experimentalfraction of radon progeny, Journal of Nanoparticles

Ruzer, Lev S.

2008-01-01T23:59:59.000Z

47

Thoron detection with an active Radon exposure meterFirst results  

SciTech Connect (OSTI)

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.; Rhm, 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

48

TIME INTEGRATED MEASUREMENTS OF THE ACTIVITY-WEIGHTED SIZE DISTRIBUTION OF RADON PROGENY by  

E-Print Network [OSTI]

The dose to the lung is dependent on the size distribution as well as the concentration of radon progeny. The principal indicator of particle size is the diffusion coefficient. The diffusion coefficient of radon progeny is the most important parameter in determining whether the particle will deposit its alpha energy in the tracheobronchial region of the respiratory tract. Due to the importance of the size distribution of progeny when characterizing health effects, a detector was developed that exploits the difference in diffusion coefficients to provide integrated measurements of the activity-weighted size distribution. Several radon chamber tests were performed in which the diffusion coefficient and unattached fraction of radon progeny were varied by the use of trace gasses and aerosol particles. The technical feasibility of this new detector design was demonstrated in all cases.

William C. Tetley P. E; Daniel R. Westcott; Bruce A. Cununings

49

Recoil-deposited Po-210 in radon dwellings  

SciTech Connect (OSTI)

Short-lived decay products of Rn-222 plate out on all surfaces in a house containing radon gas. Following the subsequent alpha decays of the mother nuclei, the daughter products Pb-214 and Pb-210 are superficially and permanently absorbed. Due to its long half-life (22 y) the activity of absorbed Pb-210 accumulates in the surface. The activity of Pb-210, or its decay products, can thus reflect the past randon daughter and plate-out history of a house over several decades. Our results and experience from measurements of Po-210 and Rn-222 in 22 dwellings will be presented. In these studies the Po-210 surface activity of one plane glass sheet per dwelling (window panes were not used) has been determined and compared with the period of exposure times the mean radon concentration measured over a two-month period. Considering the large uncertainty in the integrated radon exposure estimate the surface {sup 210}Po correlates well (r=0.73) with the accumulated radon exposure. The {sup 210}Po activity of the glass samples has been measured non-destructively using an open-flow pulse ionization chamber and this detector has also been successfully applied in field exercises.

Samuelsson, C.

1990-12-31T23:59:59.000Z

50

E-Print Network 3.0 - alpha radioactivity measurement Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

SITE ENVIRONMENTAL REPORT4-1 Summary: a range in air of only an inch or so. Naturally occurring radioactive elements such as radon emit alpha... . This is a measure of the rate at...

51

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

E-Print Network [OSTI]

Removal of radon and radon progeny from indoor air, inMeeting on Radon-Radon Progeny Measurements, Report 520/5-August 1983. Radon - Radon Progeny Measurements, proceedings

Nero, A.V.

2008-01-01T23:59:59.000Z

52

Simulation of the Steady-State Transport of Radon from Oil into Houses with Basements under Constant Negative Pressure  

E-Print Network [OSTI]

of Indoor Radon and Radon Progeny Concentration, LBL-19726,airborne short-lived radon progeny attach to the internalsimply radon daughters, or radon progeny, are solid metals

de Oliveira Loureiro, Celso

1987-01-01T23:59:59.000Z

53

DESIGN AND PERFORMANCE OF A PASSIVE RADON DECAY PRODUCTS MONITOR  

E-Print Network [OSTI]

Electret-based passive air samplers have been used in United Kingdom and elsewhere for quantitative sampling for airborne dust. Alpha electret ion chambers (EIC) have been used for quantitative measurement of deposited alpha emitting isotopes. These two well documented principles are combined to create a passive radon progeny monitor. Large area (50 cm2) electret charged to 500 to 2000 volts collect airborne radon decay products and the collected sample is "viewed " and measured by an alpha EIC. Such collection and measurement continues for the entire period of sampling, providing an integrated signal to the electret in alpha EIC. The present work is of exploratory nature and provides the responses of three different sizes of collection electrets. Results are also compared with a simple passive device with no collecting electret. The study provides data for optimization of the design depending upon the requirement. Study is limited to a typical home with equilibrium ratios from 40 to 60%. This method can be used for both short term and long term monitoring of RDP in working level units.

F. Stieff

2006-01-01T23:59:59.000Z

54

SEISMIC IMAGING WITH THE GENERALIZED RADON ...  

E-Print Network [OSTI]

SEISMIC IMAGING WITH THE GENERALIZED RADON. TRANSFORM AND DOUBLE BEAMFORMING: A CURVELET. TRANSFORM PERSPECTIVE. M V DE...

2008-07-29T23:59:59.000Z

55

A Radon Progeny Deposition Model  

E-Print Network [OSTI]

The next generation low-background detectors operating underground aim for unprecedented low levels of radioactive backgrounds. Although the radioactive decays of airborne radon (particularly Rn-222) and its subsequent progeny present in an experiment are potential backgrounds, also problematic is the deposition of radon progeny on detector materials. Exposure to radon at any stage of assembly of an experiment can result in surface contamination by progeny supported by the long half life (22 y) of Pb-210 on sensitive locations of a detector. An understanding of the potential surface contamination from deposition will enable requirements of radon-reduced air and clean room environments for the assembly of low background experiments. It is known that there are a number of environmental factors that govern the deposition of progeny onto surfaces. However, existing models have not explored the impact of some environmental factors important for low background experiments. A test stand has been constructed to deposit radon progeny on various surfaces under a controlled environment in order to develop a deposition model. Results from this test stand and the resulting deposition model are presented.

V. E. Guiseppe; S. R. Elliott; A. Hime; K. Rielage; S. Westerdale

2010-12-30T23:59:59.000Z

56

RADON 131 7. ANALYTICAL METHODS  

E-Print Network [OSTI]

The purpose of this chapter is to describe the analytical methods that are available for detecting, measuring, and/or monitoring radon and its progeny. The intent is not to provide an exhaustive list of analytical methods. Rather, the intention is to identify well-established methods that are used as the standard methods of analysis. Many of the analytical methods used for environmental samples are the methods approved by federal agencies and organizations such as EPA and the National Institute for Occupational Safety and Health (NIOSH). Other methods presented in this chapter are those that are approved by groups such as the Association of Official Analytical Chemists (AOAC) and the American Public Health Association (APHA). Additionally, analytical methods are included that modify previously used methods to obtain lower detection limits and/or to improve accuracy and precision. 7.1 BIOLOGICAL MATERIALS Table 7-1 lists various methods used to detect radon progeny in biological samples. Since the half-life of radon is short, its measurement in biological samples, such as serum, urine, blood, etc., is not practical. Measurements of the longer lived radon progeny 210 Pb and 210 Po in biological samples may be used as an indication of radon exposure; however, ingestion of these isotopes from food and drinking water or direct exposure from other environmental media are considered the primary sources of exposure for these

unknown authors

57

Evaluation of selected modern filter media for use in radon/thoron progeny measurements  

SciTech Connect (OSTI)

We tested a number of air sampling filters to determine their suitability for use in radon/thoron progeny measurements. The main test consisted of sampling a radon progeny atmosphere, then measuring the energy spectrum of the alpha particles emerging from the face of the filter. It was found that Millipore AA, long a favorite for this application, is still a good choice. However, this filter is prone to developing electrostatic charge, which can cause the additional collection of {sup 218}Po during filter handling. Metricel DM-800 is also a good choice, and it is less prone to charging. 12 refs., 3 figs., 2 tabs.

Knutson, E.O. [USDOE Environmental Measurements Lab., New York, NY (United States); Seo, Kyung-Won [Korea Atomic Energy Research Inst., Daeduk (Korea, Republic of). Health Physics Dept.

1996-04-01T23:59:59.000Z

58

Simulation of Radon Transport in Geothermal Reservoirs  

SciTech Connect (OSTI)

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

59

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

E-Print Network [OSTI]

rights reserved. Keywords: Radon; Radon progeny; Human respiratory tract; Dose conversion coefficient

Yu, K.N.

60

SEASONAL AND ANNUAL AVERAGE RADON LEVELS IN 70 HOUSES  

E-Print Network [OSTI]

A year-long, mu1 ti pollutant, indoor air qua1 ity study involving 70 occupied houses in four states was completed in 1987. All of the houses included in the study had a partial or complete basement with a concrete slab floor and block walls. On an approximately quarterly schedule, integrating monitors for short-1 i ved radon progeny, N02, HCHO, and H20 were exposed for one week in each house on both the basement and main 1 eve1 s. At the beginning of the study, a pair of alpha track detectors were placed both on top of the refrigerator in the kitchen (or some other sampling site on the main floor) and at a sampling site in the basement. One detector at each sampl ing site was left in place for a year. The other detector at each sampling site was retrieved after about three month's exposure and replaced with another detector for the next quarter. In addition, short-term samples of radon and radon progeny were made at

C. S. Dudney; A. R. Hawthorne

1988-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "alpha excluding radon" 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

Silica Fume as a Radon Retardant from Concrete  

E-Print Network [OSTI]

, and tracheobronchial deposition of radon progeny can lead to lung cancers. Aggregates (granite) are known-made indoor environments, mainly due to poor ventilation. Radon decays to form radon progeny. While most of the radon gas inhaled will be exhaled, the radon progeny will adhere to the respiratory tract. It is now

Yu, K.N.

62

Clean Water Act (excluding Section 404)  

SciTech Connect (OSTI)

This Reference Book contains a current copy of the Clean Water Act (excluding Section 404) and those regulations that implement the statutes and appear to be most relevant to US Department of Energy (DOE) activities. The document is provided to DOE and contractor staff for informational purposes only and should not be interpreted as legal guidance. Updates that include important new requirements will be provided periodically. Questions concerning this Reference Book may be directed to Mark Petts, EH-231 (202/586-2609).

Not Available

1993-01-15T23:59:59.000Z

63

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

64

Protocols for radon and radon decay product measurements in homes (revised)  

SciTech Connect (OSTI)

The document provides a technical discussion of the guidelines presented in EPA's Citizen's Guide to Radon and Home Buyer's and Seller's Guide to Radon. In addition, general procedural recommendations are included for measurement services. For example, recommendations are provided for topics such as client interview, measurement procedures, quality assurance, standard operating procedures, providing test results and information to consumers. The document supersedes EPA's Indoor Radon and Radon Decay Product Measurement Protocols (EPA 520-1-89-009).

Not Available

1993-06-01T23:59:59.000Z

65

atmospheric radon concentration: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The present author has kept observation for concentrations of atmospheric radon, radon progeny and thoron progeny for several years at the campus of Fukushima Medical...

66

Radon measurement in schools: Revised edition  

SciTech Connect (OSTI)

The report provides school administrators and facilities managers with instructions on how to test for the presence of radon. The findings from EPA's comprehensive studies of radon measurements in schools have been incorporated into these recommendations. The report supersedes Radon Measurements in Schools- An Interim Report (EPA 520/1-89-010). However, it does not invalidate tests in the process of being conducted under the interim report.

Not Available

1993-07-01T23:59:59.000Z

67

Radon Concern in the Hickory Aquifer  

E-Print Network [OSTI]

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... of radium. Radon in groundwater occurs from the decay of radium both within the aquifer host rock and in the groundwater itself. It does not react chemically with either, however, because it is a noble or inert gas. About 1 percent to 2 percent...

Crawford, Amanda

2005-01-01T23:59:59.000Z

68

URANIUM MILL TAILINGS RADON FLUX CALCULATIONS  

E-Print Network [OSTI]

URANIUM MILL TAILINGS RADON FLUX CALCULATIONS PI?ON RIDGE PROJECT MONTROSE COUNTY, COLORADO Inc. (Golder) was commissioned by EFRC to evaluate the operations of the uranium mill tailings storage in this report were conducted using the WISE Uranium Mill Tailings Radon Flux Calculator, as updated on November

69

Articles Intercomparison of Retrospective Radon Detectors  

E-Print Network [OSTI]

We performed both a laboratory and a field intercompanison of two novel glass-based retrospective radon detectors previously used in major radon case-control studies performed in Missouri and Iowa. The new detectors estimate retrospective residential radon exposure from the accumulation of a long-lived radon decay product, 210Pb, in glass. The detectors use track registration material in direct contact with glass surfaces to measure the a-emission of a 210Pb-decay product, 210Po. The detector's track density generation rate (tracks per square centimeter per hour) is proportional to the sur6ce a-activity. In the absence of other strong sources of a-emission in the glass, the implanted surface a-activity should be proportional to the accumulated 210Po, and hence to the cumulative radon gas exposure. The goals of the intercomparison were to a) perform collocated measurements using two different glass-based retrospective radon detectors in a controlled laboratory environment to compare their relative response to implanted polonium in the absence of environmental variation, b) perform collocated measurements using two different retrospective radon progeny detectors in a variety of residential settings to compare their detection of glass-implanted polonium activities, and c) examne the correlation between track density rates and contemporary radon gas concentrations. The laboratory results suggested that the materials

R. William Field; Daniel J. Steck; Mary Ann Parkhurst; Judy A. Mahaffey; Michael C. R. Alavanja

70

Recommended Procedures for Measuring Radon Fluxes from  

E-Print Network [OSTI]

of Waste Management Office of Nuclear Material Safety and Safeguards U.S. Nuclear Regulatory Commission#12;#12;Recommended Procedures for Measuring Radon Fluxes from Disposal Sites of Residual'nat the average annual l'elease of radon-222 from the disposal sites to t.he atmosp~1er0 by residuai radioactive

71

Modeled atmospheric radon concentrations from uranium mines  

SciTech Connect (OSTI)

Uranium mining and milling operations result in the release of radon from numerous sources of various types and strengths. The US Environmental Protection Agency (EPA) under the Clean Air Act, is assessing the health impact of air emissions of radon from underground uranium mines. In this case, the radon emissions may impact workers and residents in the mine vicinity. To aid in this assessment, the EPA needs to know how mine releases can affect the radon concentrations at populated locations. To obtain this type of information, Pacific Northwest Laboratory used the radon emissions, release characteristics and local meterological conditions for a number of mines to model incremental radon concentrations. Long-term, average, incremental radon concentrations were computed based on the best available information on release rates, plume rise parameters, number and locations of vents, and local dispersion climatology. Calculations are made for a model mine, individual mines, and multiple mines. Our approach was to start with a general case and then consider specific cases for comparison. A model underground uranium mine was used to provide definition of the order of magnitude of typical impacts. Then computations were made for specific mines using the best mine-specific information available for each mine. These case study results are expressed as predicted incremental radon concentration contours plotted on maps with local population data from a previous study. Finally, the effect of possible overlap of radon releases from nearby mines was studied by calculating cumulative radon concentrations for multiple mines in a region with many mines. The dispersion model, modeling assumptions, data sources, computational procedures, and results are documented in this report. 7 refs., 27 figs., 18 tabs.

Droppo, J.G.

1985-04-01T23:59:59.000Z

72

AN ADVANCED E-PERM SYSTEM FOR SIMULTANEOUS MEASUREMENT OF CONCENTRATIONS OF RADON GAS, RADON PROGENY, EQUILIBRIUM RATIO AND UNATTACHED RADON PROGENY  

E-Print Network [OSTI]

The detrimental effects of prolonged exposure to the decay products of radon, is well known and documented in the literature. The USEPA has set a primary standard for radon progeny exposure for the general public at 0.02 WL with a corresponding derived limit of 4 pCi/L for radon gas, assuming an equilibrium ratio of 50%. Because radon gas measurement is simpler and less expensive, more than 90 % of all the currently performed radon measurements in the US, measure radon gas and estimate the actual health risk via the assumed equilibrium factor for a residential structure. However, with increased concerns of radon related exposures in building with high air circulation rates (schools and commercial buildings) the 50 % equilibrium ratio assumption may not allow for proper characterization of the true exposure from radon measurements. In these cases a more rigorous characterization by direct measurements of radon decay products may be useful follow-up measurement after initial radon measurements have identified a potential concern. This paper describes a configuration radon and radon decay product measurement devices that can simultaneously measure radon and its decay products as well as provide an indication of the relative ratio of attached to unattached decay products. This unique combination of devices has numerous applications for designers of complex remediation systems and environmental consultants who have the responsibility of providing cost effective

Paul Ph. D. Stieff; Rick Stieff; Lorin Stieff

2003-01-01T23:59:59.000Z

73

SEASONAL VARIABILITY AND BILEVEL DISTRIBUTION OF RADON AND RADON PROGENY CONCENTRATIONS IN 200 NEW JBRSEY HOMES  

E-Print Network [OSTI]

To provide data necessaw to perform a health risk assessment of the radon problem in New Jersey, concurrent radon and radon progeny measurements were made in 200 homes on two lowest floors in two different seasons. The homes were divided into categories based on their substructure, heat distribution system, and the degree of air flow between the basement and first floor levels. Specific conversion factors (equilibrium coefficients, inter-floor radon ratios, inter-season radon ratios) were determined for each house type. Basement equilibrium coefficients were generally lower in the winter than in the non-winter season. First floor equilibrium coefficients were higher than basement values. First floor to'basement radon ratios were higher for forced air houses than for houses with hot water or electric heat distribution systems and the ratios for both types of houses were higher in the winter than in the non-heating season. The winter to non-winter ratio for first floors is

Keith B- Miller; Robert A. Hchaverv M-s; Camp Dresser; Udee Inc

74

CURRENT STATE OF THE ART IN MEASURING ENVIRONMENTAL RADON  

E-Print Network [OSTI]

According to the US EPA, radon is the leading cause of lung cancer among non-smokers and the second leading cause overall. Data from several epidemiological studies show definitive evidence of the association between indoor radon exposure and lung cancer. In the past 30 years, emphasis has been on measuring radon rather than radon progeny concentrations because of the simplicity, convenience and cost effectiveness of radon measuring instruments and methods. Using an equilibrium ratio between radon and radon progeny of 0.4-0.5, radon concentration measurements can be converted to working level and to exposure in working level month. In recent years, over 1 million short-term measurements for radon were made annually using grab sampling, integrating and continuous radon devices. As a result of these short-term measurements more than 800,000 residences with elevated radon levels were identified and were mitigated successfully. This paper will emphasize the current development of different instruments and methods, their sensitivities, practicality and cost effectiveness for making short-term measurements of environmental radon. More than 99 % of indoor measurements involve radon only. Radon progeny, used mostly in research and diagnostics, will not be discussed.

A. C. George; N. Bredhoff

75

Ris-R-1201(EN) Radon Transport Modelling  

E-Print Network [OSTI]

is a numerical computer model of soil-gas and radon trans- port in porous media. It can be used, for example radon exhalation from building materials such as concrete. The finite-volume model is a technical

76

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 Inhaled progeny of 222Rn (radon progeny) are the most important source of irradiation of the human-, urban-, and marine-influenced aerosols. The ASDs of attached radon progeny for all three studied ambient

Yu, K.N.

77

Various factors affecting the calibration of alpha track detectors: a Monte Carlo study  

E-Print Network [OSTI]

and the range-energy curves for alpha particles in air (ICRU 1993). Film response calculations were based upon an analytical expression for the track forming probability of LR 115 II (Damkjaer 1986). The fractions of radon progeny plating out on the inner...

McCullough, Steven Patrick

1995-01-01T23:59:59.000Z

78

Urine Test Strips to Exclude Cerebral Spinal Fluid Blood  

E-Print Network [OSTI]

two Pearson Chi-Square tests. The first compared samplesO riginal R esearch Urine Test Strips to Exclude CerebralBayer Multistix urine test strips are designed to test

Marshall, Robin A; Hejamanowski, Chris

2011-01-01T23:59:59.000Z

79

Childhood leukaemia and indoor radon concentration 1 Ecological Association between Indoor Radon Concentration and  

E-Print Network [OSTI]

, the risk associated with natural radiation exposure still needs to be documented. Natural irradiation and food) (Sugier and Hubert, 2002). Radon is the second greatest source of exposure to ionising radiation

Boyer, Edmond

80

Systematic grid-wise radon concentration measurements and first radon map in Cyprus  

E-Print Network [OSTI]

A systematic study of the indoor airborne radon concentration in the central part of the Nicosia district was conducted, using high-sensitivity active radon portable detectors of the type "RADIM3A". From a total of 108 measurements in 54 grids of 1 km^2 area each, the overall mean value is 20.6 \\pm 13.2 Bq m^-3 (A.M.\\pm S.D.). That is almost twice less than the corresponding average worldwide value. The radon concentration levels in drinking water were also measured in 24 sites of the residential district, using the high-sensitivity radon detector of the type "RADIM3W". The mean value obtained from these measurements is 243.8 \\pm 224.8 mBq L^-1, which is relatively low compared to the corresponding internationally accepted level. The associated annual effective dose rates to each measurement were also calculated and compared to the corresponding worldwide values. From the geographical coordinates of the measuring sites and the corresponding radon concentration values, the digital radon map of the central part of the Nicosia district was constructed for the first time, by means of the ArcMap software package.

G. Theodoulou; H. Tsertos; Y. Parpottas

2012-06-26T23:59:59.000Z

Note: This page contains sample records for the topic "alpha excluding radon" 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

Systematic grid-wise radon concentration measurements and first radon map in Cyprus  

E-Print Network [OSTI]

A systematic study of the indoor airborne radon concentration in the central part of the Nicosia district was conducted, using high-sensitivity active radon portable detectors of the type "RADIM3A". From a total of 108 measurements in 54 grids of 1 km^2 area each, the overall mean value is 20.6 \\pm 13.2 Bq m^-3 (A.M.\\pm S.D.). That is almost twice less than the corresponding average worldwide value. The radon concentration levels in drinking water were also measured in 24 sites of the residential district, using the high-sensitivity radon detector of the type "RADIM3W". The mean value obtained from these measurements is 243.8 \\pm 224.8 mBq L^-1, which is relatively low compared to the corresponding internationally accepted level. The associated annual effective dose rates to each measurement were also calculated and compared to the corresponding worldwide values. From the geographical coordinates of the measuring sites and the corresponding radon concentration values, the digital radon map of the central part...

Theodoulou, G; Parpottas, Y; 10.1016/j.radmeas.2012.03.019

2012-01-01T23:59:59.000Z

82

A NEW ELECTROSTATIC RADON PROGENY COLLECTION METHOD  

E-Print Network [OSTI]

A new method for collecting radon progeny was investigated that reduces particle concentration including radon progeny in indoor air without air movement. The LECA (for bge Electrostatically Charged-) system uses a high voltage source to charge the collector surfaces (e.g., furniture pieces were used) once they have been electrically isolated from ground by teflon film. When a piece was touched by the high voltage lead its entire surface immediately become charged to about 60 % of the line voltage regardless of its material makeup. By limiting the current to 250 ua no sparking or shock sensation was experienced when touching the charged wire or collector surfaces. Progeny collection efficiencies were measured for collector areas from 8.6 to 5 1.8 m2 and voltages from 2.5 to 9 KV in an 82 m3 test-room. The optimum LECA configuration tested reduced all particulate in the test-room including both the attached and unattached progeny by about 92%. BACKGROUND Lung cancer, the priiciple radon health effect, is not caused by the radon gas itself but by its progeny, especially by the smaller unattached progeny particles that can penetrate into the deep respiratory tract. Several researchers have investigated methods of reducing progeny in indoor air but most methods tried have been unsuccessful because of their inability to remove enough of those more hazardous unattached progeny.

John C. Dempsey; Rad Elec Inc; Darold M. Wobschall

83

Environmental Radioactivity 56 (2001) 327340 Radon progeny dose conversion coefficients for  

E-Print Network [OSTI]

Journal of Environmental Radioactivity 56 (2001) 327­340 Radon progeny dose conversion coefficients; Dose conversion coefficients; Scaling factors; Radon progeny 1. Introduction Epidemiological studies cancer associated with exposure to radon progeny (Lubin, 1988). More recently, Lubin et al (1994

Yu, K.N.

84

Thermodynamical Consistency of Excluded Volume Hadron Gas Models  

E-Print Network [OSTI]

The new excluded volume hadron gas model by Singh et al. [1-7] is critically discussed. We demonstrate that in this model the results obtained from relations between thermodynamical quantities disagree with the corresponding results obtained by statistical ensemble averaging. Thus, the model does not satisfy the requirements of thermodynamical consistency.

M. I. Gorenstein

2012-05-08T23:59:59.000Z

85

Radon Transport Into a Single-Family House with a Basement  

E-Print Network [OSTI]

in most exposed to radon progeny at an annual rate uraniumto prevent how- entry of radon progeny, and the short allows

1984-01-01T23:59:59.000Z

86

Ambient Radon-222 Monitoring in Amargosa Valley, Nevada  

SciTech Connect (OSTI)

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

87

Radon release and dispersion from an open pit uranium mine  

SciTech Connect (OSTI)

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

88

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.

89

acute radon progeny: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

acute radon progeny First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 A Radon Progeny Deposition Model...

90

active radon progeny: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

radon progeny First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Retrospective radon progeny measurements...

91

LONG-TERM DETERMINATION OF AIRBORNE RADON PROGENY CONCENTRATIONS USING LR 115 DETECTORS  

E-Print Network [OSTI]

LONG-TERM DETERMINATION OF AIRBORNE RADON PROGENY CONCENTRATIONS USING LR 115 DETECTORS dose in the lung is mainly due to short-lived radon progeny, i.e. 218 Po, 214 Pb, 214 Bi and 214 Po, but not the radon (222 Rn) gas itself. Accordingly, long-term measure- ments of the concentrations of radon progeny

Yu, K.N.

92

ARE RADON GAS MEASUREMENTS ADEQUATE FOR EPIDEMIOLOGICAL STUDIES AND CASE CONTROL  

E-Print Network [OSTI]

the Jacobi model to calculate the radon progeny concentrations in a room by varying the attachment rate It is now well established that the short-lived radon progeny contributes about half of the total exposure is not attributed to the radon gas itself, but instead to its short-lived progeny. Exposure to radon progeny

Yu, K.N.

93

BEHAVIOR OF RADON PROGENY NEAR OUTDOOR SURFACES IN CONTRASTING TERRAINS  

E-Print Network [OSTI]

Federal legislation expresses a long-term goal of reducing indoor radon to levels comparable to those outdoors. A thorough understanding of the behavior of radon and its progeny in the outdoor environment is therefore important We report near-surface measurements of radon, attached-to-aerosol progeny, and unattachcd-toaerosol progeny in the contrasting environments of the forested hill country of Oak Ridge, TN and the desert sands of White Sands National Monument, NM. Vertical progeny gradients are greater at White Sands due to a smoother terrain, and dose levels tend to be lower due to lower radon flux from the gypsum sand. Both sites show a significant diurnal variation of dose rate with a maximum occurring usually in the early morning. Correlation of dose rate variation with radon variation is surprisingly small suggesting the importance of other factors such as progeny deposition and aerosol concentration in controlling outdoor dose.

S. D. Schery; P. T. Wasiolek; Y. Li

94

Indoor radon and radon decay-product measurement-device protocols  

SciTech Connect (OSTI)

The report provides information, recommendations and technological guidance for anyone providing measurement services using 15 radon decay product measurement methods. The EPA has evaluated these techniques and found them to be satisfactory. These protocols provide method-specific procedures that can be used as the basis for standard operating procedures.

Not Available

1992-07-01T23:59:59.000Z

95

Technical aspects of the sigma factor alarm method in alpha CAMs  

SciTech Connect (OSTI)

Some test must be applied to the low-level count data from alpha continuous air monitors (CAMs) to determine if the count is statistically significant (i.e., different from background). The test should also automatically account for different levels of background (i.e., ambient radon progeny concentrations). The method should, in other words, be as sensitive as possible, automatically desensitize when required, but in such a manner as to not exceed a previously-chosen acceptable false-alarm rate.

Justus, Alan Lawrence [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

96

Nationwide occurrence of radon and other natural radioactivity in public water supplies  

SciTech Connect (OSTI)

The nationwide study, which began in November of 1980, was designed to systematically sample water supplies in all 48 contiguous states. The results of the study will be used, in cooperation with EPA's Office of Drinking Water, to estimate population exposures nationwide and to support possible future standards for radon, uranium, and other natural radioactivity in public water supplies. Samples from more than 2500 public water supplies representing 35 states were collected. Although we sampled only about five percent of the total number of groundwater supplies in the 48 contiguous states of the US, those samples represent nearly 45 percent of the water consumed by US groundwater users in the 48 contiguous states. Sample results are summarized by arithmetic mean, geometric mean, and population weighted arithmetic mean for each state and the entire US. Results include radon, gross alpha, gross beta, Ra-226, Ra-228, total Ra, U-234, U-238, total U, and U-234/U-238 ratios. Individual public water supply results are found in the appendices. 24 refs., 91 figs., 51 tabs.

Horton, T. R.

1985-10-01T23:59:59.000Z

97

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

SciTech Connect (OSTI)

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

98

THE SIGNIFICANCE OF MEASUREMENT OF RADON-22O(THORON) IN HOMES  

E-Print Network [OSTI]

Radon-222 (also known as radon) is a relatively long-lived isotope of radon and originates from uranium present in the earth's crust. Radon-220 (also known as thoron) is a short-lived isotope of radon and originates from thorium present in the earth's crust. these gases are compared. Fundamental properties and health hazards of On the average, the thoron contribution to the total dose to the lungs is in the range of 10 % to 15 % of that from radon. In homes with elevated levels of radon progeny concentration there is no corresponding elevation of thoron progeny levels, making the contribution from thoron progeny quite insignificant. However, there are certain situations where thoron measurements are important. hey are: 1) areas rich in thorium, 2) thorium refineries and 3) while measuring soil gas concentrations. Thoron can interfere in certain flow-through radon monitors, by causing an additional signal. If the total signal is interpreted as due to radon, such monitors overestimate the radon levels. A large (18 liter) double filter unit used to measure the thoron gas concentration in a low radon basement gave 0.5 pCi/ ~ of thoron and the corresponding level for radon was 1.5 pCi/L. 1 Some radon testchambers use soil gas as a source of radon.-Several measurements were also carried out in one such chamber, and the levels were-below 0.5 pCi/L irrespective of the levels of radon, indicating an insignificant contribution to the flow-through radon monitors. Key words: radon, thoron, radon progeny, and thoron progeny.

J. Dempsey; Rad Elec Inc

99

RADON AND ITS DAUGHTERS IN ENERGY EFFICIENT BUILDINGS  

E-Print Network [OSTI]

W.W. Nazaroff, Radon in Energy-Efficient Houses, LawrenceStudies, pp. 18- 23 in Energy Efficient Buildings Program,AMD ITS DAUCHTERS IN ENERGY-EFFICIENT BUILDINCS A.V. Nero,

Nero, A.V.

2010-01-01T23:59:59.000Z

100

RADON AND ITS DAUGHTERS IN ENERGY EFFICIENT BUILDINGS  

E-Print Network [OSTI]

AMD ITS DAUCHTERS IN ENERGY-EFFICIENT BUILDINCS A.V. Nero,W.W. Nazaroff, Radon in Energy-Efficient Houses, LawrenceStudies, pp. 18- 23 in Energy Efficient Buildings Program,

Nero, A.V.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "alpha excluding radon" 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

au radon dans: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 161 A Radon Progeny Deposition Model CERN Preprints Summary: The next generation low-background...

102

Radon attenuation handbook for uranium mill tailings cover design  

SciTech Connect (OSTI)

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

103

Radon Transform in Finite Dimensional Hilbert Space  

E-Print Network [OSTI]

Novel analysis of ?nite dimensional Hilbert space is outlined. The approach bypasses general, inherent, di?culties present in handling angular variables in ?nite dimensional problems: The ?nite dimensional, d, Hilbert space operators are underpinned with ?nite geometry which provide intuitive perspective to the physical operators. The analysis emphasizes a central role for projectors of mutual unbiased bases (MUB) states, extending thereby their use in ?nite dimensional quantum mechanics studies. Interrelation among the Hilbert space operators revealed via their (?nite) dual a?ne plane geometry (DAPG) underpinning are displayed and utilized in formulating the ?nite dimensional ubiquitous Radon transformation and its inverse illustrating phase space-like physics encoded in lines and points of the geometry. The ?nite geometry required for our study is outlined.

M. Revzen

2012-02-06T23:59:59.000Z

104

Lung Cancer Attributable to Indoor Radon Exposures in Two Radon--Prone Areas, Stei (Romania) and Torrelodones (Spain)  

SciTech Connect (OSTI)

Radon and radon progeny are present indoors, in houses and others dwellings, representing the most important contribution to dose from natural sources of radiation. Most studies have demonstrated an increased risk of lung cancer at high concentration of radon for both smokers and nonsmokers. For medium and low concentrations which are the typical residential radon levels, recent researches have also demonstrated increased risks of lung cancer for people exposed. The work presents a comparative analysis of the radon exposure data in the two radon--prone areas, Stei, Transylvania, (Romania), in the near of old Romanian uranium mines and in the granitic area of Torrelodones town, Sierra de Guadarrama (Spain). One important difference between the two studied areas is related to the houses built using uranium waste as construction material in Stei area. Measurements of indoor radon were performed in 280 dwellings (Romania) and 91 dwellings (Spain) by using nuclear track detectors, CR 39. The highest value measured in Stei area was 2650 Bq{center_dot}m{sup -3}. and 366 Bq{center_dot}m{sup -3} in the Spanish region. The results are compute with the BEIR VI report estimates using the age-duration model at an exposure rate below 2650 Bq{center_dot}m{sup -3}. A total of 233 lung cancer deaths were calculated in the Stei area for a period of 13 years (1994-2006), which is 116.82% higher than observed from the national statistics. In comparison, in Torrelodones area, a number of 276 deaths caused by lung cancer were estimated along a period of 13 years, which is 2.09 times higher than the number observed by authorities. This represents a significantly evidence that elevated risk can strongly be associated with cumulated radon exposure.

Dinu, Alexandra; Cosma, Constantin; Vasiliniuc, Stefan [Faculty of Env. Science, 'Babes-Bolyai' University, Fantanele, No. 30 Cluj Napoca (Romania); Sainz, Carlos; Poncela, Luis Santiago Quindos [Department of Medical Physics, Faculty of Medicine, University of Cantabria, c/Herrera Oria s/n. 39011, Santander (Spain)

2009-05-22T23:59:59.000Z

105

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

106

Sensitivity of LR 115 detectors in hemispherical chambers for radon measurements  

E-Print Network [OSTI]

, if the radius is larger than 3 cm, the effects of the deposition fraction of radon progeny will come into effect one which provides the total sensitivity independent of the deposition fraction of radon progeny. ?

Yu, K.N.

107

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

E-Print Network [OSTI]

Coefficient of Radon in Concrete", Health Phys. 30, 263. Didiffusion of radon through concrete. The source loop exposesa 2.5-cm sample taken from a different type of concrete.

Zapalac, Geordie H.

2013-01-01T23:59:59.000Z

108

Long-term measurements of unattached radon progeny concentrations using solid-state nuclear track detectors  

E-Print Network [OSTI]

Long-term measurements of unattached radon progeny concentrations using solid-state nuclear track of radon progeny from a set of measured (f1, f2, f3) values, where fi¼Ci/C0 (i¼1, 2, 3), and C0, C1, C2 is mainly due to short-lived radon progeny, i.e., 218 Po, 214 Pb, 214 Bi and 214 Po, but not to the radon

Yu, K.N.

109

The effect of desiccation on UMTRA Project radon barrier materials  

SciTech Connect (OSTI)

The proposed US Environmental Protection Agency (EPA) groundwater standards (40 CFR 192) require that Uranium Mill Tailings Remedial Action (UMTRA) Project remedial action designs meet low numerical limits for contaminants contained in water or vapors exiting the disposal cell embankments. To meet the standards, a cover of compacted, fine-grained soil is placed over UMTRA Project embankments. One of the functions of this cover is to limit infiltration into the disposal cell . The hydraulic conductivity of this infiltration barrier must be low in order to reduce the resultant seepage from the base of the cell to the extent necessary to comply with the proposed EPA groundwater standards. Another function of this cover is to limit the emission of radon gas. The air permeability of the cover must be low in order to reduce radon emissions to comply with EPA standards. Fine-grained soils exposed to evaporation will dry. Continued exposure will cause shrinking that, if allowed to continue, will eventually result in the development of cracks. The results of the cracking could be an increase in the hydraulic conductivity and an increase in the air permeability. This could then allow additional infiltration and increased radon emissions. Cracking of the radon barrier has been noted at one UMTRA Project location. The potential for cracking of the radon barrier during construction has been addressed by requiring moistening of previously compacted surfaces prior to placing additional lifts. The efficacy of these treatments has not been verified. The potential for cracking after construction of the cover is completed has also not been examined. The purpose of this study is to evaluate the potential for cracking of the radon barrier both during construction and after completion of the cover. The effect of shrinkage cracking on the performance of the radon barrier will also be examined.

Not Available

1990-11-01T23:59:59.000Z

110

Excluded Volume Effects in Polymer Solutions: II. Comparison of Experimental Results with Numerical Simulation Data  

SciTech Connect (OSTI)

The effect of excluded volume on the coil size of dilute linear polymers was investigated by off-lattice Monte Carlo simulations. The radius of gyration R{sub g} was evaluated for a wide range of chain lengths at several temperatures and at the athermal condition. The theta temperature and the corresponding theta chain dimensions were established for the system, and the dependence of the size expansion factor, a{sub s} = R{sub g} /(R{sub g}){sub {theta}}, on chain length N and temperature T was examined. For long chains and at high temperatures, a{sub s} is a function of N/N{sub s}{sup 2} alone, where the length scale N{sub s}{sup 2} depends only on T. The form of this simulations-based master function compares favorably with {alpha}{sub s}(M/M{sub s}{sup 2}), an experimental master curve for linear polymers in good solvents, where M{sub s}{sup 2} depends only on polymer-solvent system. Comparisons when N{sub s}{sup 2}(T) and M{sub s}{sup 2}(system) are reduced to common units, numbers of Kuhn steps, strongly indicate that coil expansion in even the best of good solvents is small relative to that expected for truly athermal solutions. An explanation for this behavior is proposed, based on what would appear to be an inherent difference in the equation of state properties for polymeric and monomeric liquids.

Graessley, W.W.; Grest, G.S.; Hayward, R.C.

1999-03-23T23:59:59.000Z

111

KILLING OF TARGET CELLS DUE TO RADON PROGENY IN THE HUMAN LUNG  

E-Print Network [OSTI]

KILLING OF TARGET CELLS DUE TO RADON PROGENY IN THE HUMAN LUNG B. M. F. Lau1 , D. Nikezic1,2 and K to inhaled radon progeny in the human lung. The present work uses the microdosimetric approach and determines- ratory tract (HRT) due to inhaled radon progeny, ICRP66(1) made use of the absorbed fraction (AF) which

Yu, K.N.

112

Letter to the editor Comment on ``Radon-222 signatures of natural ventilation regimes in an underground  

E-Print Network [OSTI]

fraction of radon progeny in human bronchial airways with bifurcation geometry. International Journal-B tree due to radon progeny. International Journal of Radiation Biology 77, 559­565. Nikezic, D., Yu, K for radon progeny. Radiation and Environmental Biophysics 40, 207­211. Nikezic, D., Yu, K.N., 2002a

Yu, K.N.

113

Applied Radiation and Isotopes 55 (2001) 707713 Bronchial dosimeter for radon progeny  

E-Print Network [OSTI]

Applied Radiation and Isotopes 55 (2001) 707­713 Bronchial dosimeter for radon progeny T of the dose conversion factor (in units of mSv WL M­1 ) with the size of radon progeny from 1 to 1000 nm place and at home. It is now established that the inhalation of airborne short-lived radon progeny

Yu, K.N.

114

Long-term measurements of radon progeny concentrations with LR 115 SSNTDs  

E-Print Network [OSTI]

Long-term measurements of radon progeny concentrations with LR 115 SSNTDs K.N. Yua,*, D. Nikezica.V. All rights reserved. Keywords: Radon progeny concentration; Equilibrium factor; LR 115 detector 1. Introduction Methods for long-term monitoring of concentrations of radon progeny or the equilibrium factor

Yu, K.N.

115

An alpha scintillation spectrometer  

E-Print Network [OSTI]

investi- gation of the properties of alpha radiation. In his work, the scin- tillations produced by alpha particles impinging on a zinc-sulphide screen were observed and counted visually with the aid of a low power microscope. The scintillations..., the source changing in the proportional counter is inconvenient, requiring a fairly elaborate gas handling and purifying system. Alpha particl s, when passing through a photographic emulsion, ionize the silver halide crystals with which they come...

Yates, Ralph Aaron

1952-01-01T23:59:59.000Z

116

Long-term determination of airborne radon progeny concentrations using LR 115 solid-state nuclear track detectors  

E-Print Network [OSTI]

Long-term determination of airborne radon progeny concentrations using LR 115 solid-state nuclear. Introduction The radon-related absorbed dose in the lung is mainly due to short-lived radon progeny, i.e., 218-term measurements of the concentrations of radon progeny or the equilibrium factor F, among other information

Yu, K.N.

117

Retrospective radon progeny measurements through measurements of 210 activities on glass objects using stacked LR 115 detectors  

E-Print Network [OSTI]

Retrospective radon progeny measurements through measurements of 210 Po activities on glass objects 2 September 2008 PACS: 29.40 23.60 Keywords: Radon Radon progeny 210 Po Implantation Retrospective for determining 210 Po activity in glass surfaces after deposition of short-lived radon progeny. The sensitivities

Yu, K.N.

118

E-Print Network 3.0 - advanced cancer excluding Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Powered by Explorit Topic List Advanced Search Sample search results for: advanced cancer excluding Page: << < 1 2 3 4 5 > >> 1 Eur J Cancer. Author manuscript Social...

119

Modeling surface backgrounds from radon progeny plate-out  

SciTech Connect (OSTI)

The next generation low-background detectors operating deep underground aim for unprecedented low levels of radioactive backgrounds. The surface deposition and subsequent implantation of radon progeny in detector materials will be a source of energetic background events. We investigate Monte Carlo and model-based simulations to understand the surface implantation profile of radon progeny. Depending on the material and region of interest of a rare event search, these partial energy depositions can be problematic. Motivated by the use of Ge crystals for the detection of neutrinoless double-beta decay, we wish to understand the detector response of surface backgrounds from radon progeny. We look at the simulation of surface decays using a validated implantation distribution based on nuclear recoils and a realistic surface texture. Results of the simulations and measured ? spectra are presented.

Perumpilly, G.; Guiseppe, V. E.; Snyder, N. [University of South Dakota, Vermillion, South Dakota 57069 (United States)] [University of South Dakota, Vermillion, South Dakota 57069 (United States)

2013-08-08T23:59:59.000Z

120

alpha cap alpha: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

present review provides an update on alphas measurements from the past year. W. J. Stirling 1997-09-23 3 ALPHA OMEGA ALPHA National Honor Medical Society Biology and Medicine...

Note: This page contains sample records for the topic "alpha excluding radon" 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

alpha pkc alpha: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

present review provides an update on alphas measurements from the past year. W. J. Stirling 1997-09-23 3 ALPHA OMEGA ALPHA National Honor Medical Society Biology and Medicine...

122

Imaging alpha particle detector  

DOE Patents [OSTI]

A method and apparatus for detecting and imaging alpha particles sources is described. A dielectric coated high voltage electrode and a tungsten wire grid constitute a diode configuration discharge generator for electrons dislodged from atoms or molecules located in between these electrodes when struck by alpha particles from a source to be quantitatively or qualitatively analyzed. A thin polyester film window allows the alpha particles to pass into the gas enclosure and the combination of the glass electrode, grid and window is light transparent such that the details of the source which is imaged with high resolution and sensitivity by the sparks produced can be observed visually as well. The source can be viewed directly, electronically counted or integrated over time using photographic methods. A significant increase in sensitivity over other alpha particle detectors is observed, and the device has very low sensitivity to gamma or beta emissions which might otherwise appear as noise on the alpha particle signal.

Anderson, D.F.

1980-10-29T23:59:59.000Z

123

Imaging alpha particle detector  

DOE Patents [OSTI]

A method and apparatus for detecting and imaging alpha particles sources is described. A conducting coated high voltage electrode (1) and a tungsten wire grid (2) constitute a diode configuration discharge generator for electrons dislodged from atoms or molecules located in between these electrodes when struck by alpha particles from a source (3) to be quantitatively or qualitatively analyzed. A thin polyester film window (4) allows the alpha particles to pass into the gas enclosure and the combination of the glass electrode, grid and window is light transparent such that the details of the source which is imaged with high resolution and sensitivity by the sparks produced can be observed visually as well. The source can be viewed directly, electronically counted or integrated over time using photographic methods. A significant increase in sensitivity over other alpha particle detectors is observed, and the device has very low sensitivity to gamma or beta emissions which might otherwise appear as noise on the alpha particle signal.

Anderson, David F. (Los Alamos, NM)

1985-01-01T23:59:59.000Z

124

E-Print Network 3.0 - alpha-emitters radon lung Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Health- Publications and Products Collection: Environmental Sciences and Ecology 4 REPORT NO. 8 radiation hazards Summary: precludesdrawing definite conclusions from them....

125

E-Print Network 3.0 - alpha-track radon monitor Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Public Health Tracking Network COLORADO Keeping Track, Promoting Health Summary: 's geology, topography and industries shape many of these concerns. For example, uranium,...

126

GL069 Financial Summary (Including Multi-Year Funds And Excluding Agency Funds)  

E-Print Network [OSTI]

GL069 Financial Summary (Including Multi-Year Funds And Excluding Agency Funds) GL069 Cognos Report, or click . Legacy Name/Type - This report is an enhancement to the GL013 report. #12;GL069 Financial Summary (Including Multi-Year Funds And Excluding Agency Funds) GL069 Cognos Report Job Aid ­ cdm 7

Shull, Kenneth R.

127

GL071 Financial Summary Historical Comparison (Excluding Agency and Multi-Year Funds)  

E-Print Network [OSTI]

GL071 Financial Summary ­ Historical Comparison (Excluding Agency and Multi-Year Funds) GL071 into the Entries box, or click . Legacy Name/Type ­ Similar to MCFITS reports. #12;GL071 Financial Summary ­ Historical Comparison (Excluding Agency and Multi-Year Funds) GL071 Cognos Report Job Aid - cdm 7

Shull, Kenneth R.

128

GL070 Financial Summary with Project Purpose (Excluding Agency and Multi-Year Funds)  

E-Print Network [OSTI]

GL070 Financial Summary with Project Purpose (Excluding Agency and Multi-Year Funds) GL070 Cognos is an enhancement to the Cognos GL013 report. #12;GL070 Financial Summary with Project Purpose (Excluding Agency and Multi-Year Funds) GL070 Cognos Report Job Aid - cdm 7/23/2010 © 2009 Northwestern University Page 2 of 4

Shull, Kenneth R.

129

UC Davis Student Services Fee (excludes Mental Health funds) Student Services and Fees Administrative Advisory Committee  

E-Print Network [OSTI]

UC Davis Student Services Fee (excludes Mental Health funds) Student Services and Fees Management Capital Projects 2 943,666.00$ (2,807.79)$ (946,473.79)$ -$ Child Care 45,325.16$ 144,957.08$ 99 and Institutional Analysis #12;UC Davis Student Services Fee (excludes Mental Health funds) Student Services

Pasternack, Gregory B.

130

Discovery of the astatine, radon, francium, and radium isotopes  

SciTech Connect (OSTI)

Thirty-nine astatine, thirty-nine radon, thirty-five francium, and thirty-four radium isotopes have so far been observed; the discovery of these isotopes is described. For each isotope a brief summary of the first refereed publication, including the production and identification method, is presented.

Fry, C.; Thoennessen, M., E-mail: thoennessen@nscl.msu.edu

2013-09-15T23:59:59.000Z

131

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

E-Print Network [OSTI]

arterial supply and effectively blocks the external cooling wave from advancing to the core of the brain1 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

132

Alpha Particle Diagnostic  

SciTech Connect (OSTI)

The study of burning plasmas is the next frontier in fusion energy research, and will be a major objective of the U.S. fusion program through U.S. collaboration with our international partners on the ITER Project. For DT magnetic fusion to be useful for energy production, it is essential that the energetic alpha particles produced by the fusion reactions be confined long enough to deposit a significant fraction of their initial ~3.5 MeV energy in the plasma before they are lost. Development of diagnostics to study the behavior of energetic confined alpha particles is a very important if not essential part of burning plasma research. Despite the clear need for these measurements, development of diagnostics to study confined the fast confined alphas to date has proven extremely difficult, and the available techniques remain for the most part unproven and with significant uncertainties. Research under this grant had the goal of developing diagnostics of fast confined alphas, primarily based on measurements of the neutron and ion tails resulting from alpha particle knock-on collisions with the plasma deuterium and tritium fuel ions. One of the strengths of this approach is the ability to measure the alphas in the hot plasma core where the interesting ignition physics will occur.

Fisher, Ray, K.

2009-05-13T23:59:59.000Z

133

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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:...

134

E-Print Network 3.0 - admissible du radon Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

a and NEMO collaboration... ) Abstract: The first data of the NEMO 3 neutrinoless double beta decay experiment have shown that the radon... can be a non negligible component...

135

E-Print Network 3.0 - america residential radon Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

a and NEMO collaboration... ) Abstract: The first data of the NEMO 3 neutrinoless double beta decay experiment have shown that the radon... can be a non negligible component...

136

E-Print Network 3.0 - assessing cumulative radon Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

a and NEMO collaboration... ) Abstract: The first data of the NEMO 3 neutrinoless double beta decay experiment have shown that the radon... can be a non negligible component...

137

E-Print Network 3.0 - astatine radon francium Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

a and NEMO collaboration... ) Abstract: The first data of the NEMO 3 neutrinoless double beta decay experiment have shown that the radon... can be a non negligible component...

138

E-Print Network 3.0 - austrian radon database Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

a and NEMO collaboration... ) Abstract: The first data of the NEMO 3 neutrinoless double beta decay experiment have shown that the radon... can be a non negligible component...

139

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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...

140

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 (OSTI)

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

Note: This page contains sample records for the topic "alpha excluding radon" 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

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 (OSTI)

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

142

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

E-Print Network [OSTI]

..........................................................................................................................9 Electret Ion Chambers.......................................................................................... 9 Secular Equilibrium in the Scale........................................................................ 13 Radon Progeny...................................................................................................................... 21 Radon Progeny Equilibration and Measurement ............................................... 23 LabSOCS Verification and Virtual Standard Creation ...................................... 24 Electret Calibration...

Fruchtnicht, Erich Harold

2004-11-15T23:59:59.000Z

143

Radon induced surface contaminations in low background experiments  

SciTech Connect (OSTI)

In neutrinoless double-beta decay and dark matter searches, one of the main issues is to increase the experimental sensitivity through careful material selection and production, minimizing the background contributions. In order to achieve the required, extremely low, counting rates, very stringent requirements must be fulfilled in terms of bulk material radiopurity. As the experimental sensitivity increases, the bulk impurities in the detector components decrease, and surface contaminations start to play an increasingly significant role In fully active detectors, like cryogenic particle detectors, surface contaminations are a critical issue (as shown by the CUORICINO experiment). {sup 222}Rn is by far the most intense source of airborne radioactivity, and if a radio-pure material is exposed to environment where the Radon concentration is not minimized, {sup 210}Pb and {sup 210}Po contaminations can occur. The mechanisms and the dynamics of Radon-induced surface contaminations are reviewed, and specific solutions to prevent and to reject the induced background are presented.

Pattavina, L. [INFN - Laboratori Nazionali del Gran Sasso, I-67010 Assergi (AQ) (Italy)] [INFN - Laboratori Nazionali del Gran Sasso, I-67010 Assergi (AQ) (Italy)

2013-08-08T23:59:59.000Z

144

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

SciTech Connect (OSTI)

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

145

Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with  

E-Print Network [OSTI]

Long-term determination of airborne concentrations of unattached and attached radon progeny using-term measurements Radon progeny a b s t r a c t We developed the theoretical basis for long-term determination of airborne concentrations of unattached and attached radon progeny. The work was separated into two parts

Yu, K.N.

146

Abstract It is an established fact that radon progeny can induce lung cancers. However, there is a well-known  

E-Print Network [OSTI]

Abstract It is an established fact that radon progeny can induce lung cancers. However, there is a well-known discrepancy between the epidemiologically derived dose conversion factor for radon progeny is a unit of exposure to radon progeny). Up to now there is no satisfactory expla- nation to this

Yu, K.N.

147

Alpha-decay half-lives, alpha-capture and alpha-nucleus potential  

E-Print Network [OSTI]

The alpha-decay half-lives and the alpha-capture cross-sections are evaluated in the framework of unified model for alpha-decay and alpha-capture. In the framework of this model the alpha-decay and alpha-capture are considered as penetration of the alpha-particle through the potential barrier formed by nuclear, Coulomb and centrifugal interactions between alpha-particle and nucleus. The spins and the parities of parent and daughter nuclei as well as the quadrupole and hexadecapole deformations of daughter nuclei are taken into account for evaluation of the alpha-decay half-lives. The alpha-decay half-lives for 344 nuclei and the alpha-capture cross-sections of 40Ca, 44Ca, 59Co, 208Pb and 209Bi agree well with the experimental data. The evaluated alpha-decay half-lives within the range 10^{-9} alpha-emitters are tabulated.

V. Yu. Denisov; A. A. Khudenko

2009-02-04T23:59:59.000Z

148

Particle number fluctuations in nuclear collisions within excluded volume hadron gas model  

E-Print Network [OSTI]

The multiplicity fluctuations are studied in the van der Waals excluded volume hadron-resonance gas model. The calculations are done in the grand canonical ensemble within the Boltzmann statistics approximation. The scaled variances for positive, negative and all charged hadrons are calculated along the chemical freeze-out line of nucleus-nucleus collisions at different collision energies. The multiplicity fluctuations are found to be suppressed in the van der Waals gas. The numerical calculations are presented for two values of hard-core hadron radius, $r=0.3$ fm and 0.5 fm, as well as for the upper limit of the excluded volume suppression effects.

M. I. Gorenstein; M. Hauer; D. O. Nikolajenko

2007-02-26T23:59:59.000Z

149

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

SciTech Connect (OSTI)

This report is an introduction to the behavior of radon 222 and its decay products in indoor air. This includes review of basic characteristics of radon and its decay products and of features of the indoor environment itself, all of which factors affect behavior in indoor air. The experimental and theoretical evidence on behavior of radon and its decay products is examined, providing a basis for understanding the influence of geological, structural, and meteorological factors on indoor concentrations, as well as the effectiveness of control techniques. We go on to examine three important issues concerning indoor radon. We thus include (1) an appraisal of the concentration distribution in homes, (2) an examination of the utility and limitations of popular monitoring techniques and protocols, and (3) an assessment of the key elements of strategies for controlling radon levels in homes.

Nero, A.V.; Gadgil, A.J.; Nazaroff, W.W.; Revzan, K.L.

1990-01-01T23:59:59.000Z

150

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

151

Characterization of the radon source in North-Central Florida. Final report part 1 -- Final project report; Final report part 2 -- Technical report  

SciTech Connect (OSTI)

This report contains two separate parts: Characterization of the Radon Source in North-Central Florida (final report part 1 -- final project report); and Characterization of the Radon Source in North-Central Florida (technical report). The objectives were to characterize the radon 222 source in a region having a demonstrated elevated indoor radon potential and having geology, lithology, and climate that are different from those in other regions of the U.S. where radon is being studied. Radon availability and transport in this region were described. Approaches for predicting the radon potential of lands in this region were developed.

NONE

1997-12-01T23:59:59.000Z

152

*Excludes capital investment for P&R facility EFFECTS OF MAP-21 ON SEAMLESS TRANSIT FROM  

E-Print Network [OSTI]

*Excludes capital investment for P&R facility EFFECTS OF MAP-21 ON SEAMLESS TRANSIT FROM FORT BEND is not available for residents making the commute from FBC to Downtown Houston. Researchers estimate latent demand for 1,700+ P&R one-way passenger trips per day. SEAMLESS TRANSIT COST Federal funds may

153

GL074 Financial Summary with Management Level & Project Purpose (Excluding Agency and Multi-Year Funds)  

E-Print Network [OSTI]

GL074 Financial Summary with Management Level & Project Purpose (Excluding Agency and Multi-Year Funds) (notes on running the report) Reporting Cognos 12/13/2010-vlr GL074 Financial Summary of the new filters found in the Cognos report GL074 Financial Summary with Management Level & Project Purpose

Shull, Kenneth R.

154

GL068 Financial Summary (Excluding Agency and Multi-Year Funds)  

E-Print Network [OSTI]

GL068 Financial Summary (Excluding Agency and Multi-Year Funds) GL068 Cognos Report Job Aid - cdm 9/21/2009 © 2009 Northwestern University Page 1 of 5 General Information about the GL068 Report Description to see more. Legacy Name/Type This report is an enhancement to the Cognos GL013 report. #12;GL068

Shull, Kenneth R.

155

Radon transform on a space over a residue class ring  

SciTech Connect (OSTI)

The functions on a space of dimension N over the residue class ring Z{sub n} modulo n that are invariant with respect to the group GL(N,Z{sub n}) form a commutative convolution algebra. We describe the structure of this algebra and find the eigenvectors and eigenvalues of the operators of multiplication by elements of this algebra. The results thus obtained are applied to solve the inverse problem for the hyperplane Radon transform on Z{sup N}{sub n}. Bibliography: 2 titles.

Molchanov, Vladimir F [Tambov State University, Tambov (Russian Federation)

2012-05-31T23:59:59.000Z

156

Spherical radon transforms and mathematical problems of thermoacoustic tomography  

E-Print Network [OSTI]

the two terms interchangeably throughout the text. Let f(x) be a continuous function on Rn, n ? 2. Deflnition 1. The circular Radon transform of f is deflned as Rf(p;r) = Z jy?pj=r f(y)d (y); where d (y) is the surface area on the sphere jy ?pj = r... centered at p 2Rn. In this deflnition we do not restrict the set of centers p or radii r. It is clear, how- ever, that this mapping is overdetermined, since the dimension of pairs (p;r) is n+1, while the function f depends on n variables only...

Ambartsoumian, Gaik

2009-06-02T23:59:59.000Z

157

ARM - Field Campaign - Radon Measurements of Atmospheric Mixing (RAMIX  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD) by Microtops Atmospheric Optical Depth (AOD) byCampaignSTations2008) govCampaignsRadon

158

Background canceling surface alpha detector  

DOE Patents [OSTI]

A background canceling long range alpha detector which is capable of providing output proportional to both the alpha radiation emitted from a surface and to radioactive gas emanating from the surface. The detector operates by using an electrical field between first and second signal planes, an enclosure and the surface or substance to be monitored for alpha radiation. The first and second signal planes are maintained at the same voltage with respect to the electrically conductive enclosure, reducing leakage currents. In the presence of alpha radiation and radioactive gas decay, the signal from the first signal plane is proportional to both the surface alpha radiation and to the airborne radioactive gas, while the signal from the second signal plane is proportional only to the airborne radioactive gas. The difference between these two signals is proportional to the surface alpha radiation alone. 5 figs.

MacArthur, D.W.; Allander, K.S.; Bounds, J.A.

1996-06-11T23:59:59.000Z

159

Nuclear Alpha-Particle Condensates  

E-Print Network [OSTI]

The $\\alpha$-particle condensate in nuclei is a novel state described by a product state of $\\alpha$'s, all with their c.o.m. in the lowest 0S orbit. We demonstrate that a typical $\\alpha$-particle condensate is the Hoyle state ($E_{x}=7.65$ MeV, $0^+_2$ state in $^{12}$C), which plays a crucial role for the synthesis of $^{12}$C in the universe. The influence of antisymmentrization in the Hoyle state on the bosonic character of the $\\alpha$ particle is discussed in detail. It is shown to be weak. The bosonic aspects in the Hoyle state, therefore, are predominant. It is conjectured that $\\alpha$-particle condensate states also exist in heavier $n\\alpha$ nuclei, like $^{16}$O, $^{20}$Ne, etc. For instance the $0^+_6$ state of $^{16}$O at $E_{x}=15.1$ MeV is identified from a theoretical analysis as being a strong candidate of a $4\\alpha$ condensate. The calculated small width (34 keV) of $0^+_6$, consistent with data, lends credit to the existence of heavier Hoyle-analogue states. In non-self-conjugated nuclei such as $^{11}$B and $^{13}$C, we discuss candidates for the product states of clusters, composed of $\\alpha$'s, triton's, and neutrons etc. The relationship of $\\alpha$-particle condensation in finite nuclei to quartetting in symmetric nuclear matter is investigated with the help of an in-medium modified four-nucleon equation. A nonlinear order parameter equation for quartet condensation is derived and solved for $\\alpha$ particle condensation in infinite nuclear matter. The strong qualitative difference with the pairing case is pointed out.

T. Yamada; Y. Funaki; H. Horiuchi; G. Roepke; P. Schuck; A. Tohsaki

2011-03-21T23:59:59.000Z

160

Clean Water Act (excluding Section 404). Environmental guidance program reference book: Revision 6  

SciTech Connect (OSTI)

This Reference Book contains a current copy of the Clean Water Act (excluding Section 404) and those regulations that implement the statutes and appear to be most relevant to US Department of Energy (DOE) activities. The document is provided to DOE and contractor staff for informational purposes only and should not be interpreted as legal guidance. Updates that include important new requirements will be provided periodically. Questions concerning this Reference Book may be directed to Mark Petts, EH-231 (202/586-2609).

Not Available

1993-01-15T23:59:59.000Z

Note: This page contains sample records for the topic "alpha excluding radon" 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

Facts and Figures January 2007 INCOME AND EXPENDITURE (Excluding Press, CA & Trusts) 2005-06  

E-Print Network [OSTI]

Facts and Figures January 2007 INCOME AND EXPENDITURE (Excluding Press, CA & Trusts) 2005-06 2004,928 Breakdown of Research Grant Income 2005-06 £'000 % £'000 Total staff 8602 8570 8,623 Research Councils 89,095 Total 203,886 188,711 Total respondents 2,890 100.0% 3,227 100.0 Breakdown of HEFCE/TDA Income 2005-06

Travis, Adrian

162

Ionic Asymmetry and Solvent Excluded Volume Effects on Spherical Electric Double Layers: A Density Functional Approach  

SciTech Connect (OSTI)

In this article we present a classical density functional theory for electrical double layers of spherical macroions that extends the capabilities of conventional approaches by accounting for electrostatic ion correlations, size asymmetry and excluded volume effects. The approach is based on a recent approximation introduced by Hansen-Goos and Roth for the hard sphere excess free energy of inhomogeneous fluids (J. Chem. Phys. 124, 154506). It accounts for the proper and efficient description of the effects of ionic asymmetry and solvent excluded volume, especially at high ion concentrations and size asymmetry ratios including those observed in experimental studies. Additionally, we utilize a leading functional Taylor expansion approximation of the ion density profiles. In addition, we use the Mean Spherical Approximation for multi-component charged hard sphere fluids to account for the electrostatic ion correlation effects. These approximations are implemented in our theoretical formulation into a suitable decomposition of the excess free energy which plays a key role in capturing the complex interplay between charge correlations and excluded volume effects. We perform Monte Carlo simulations in various scenarios to validate the proposed approach, obtaining a good compromise between accuracy and computational cost. We use the proposed computational approach to study the effects of ion size, ion size asymmetry and solvent excluded volume on the ion profiles, integrated charge, mean electrostatic potential, and ionic coordination number around spherical macroions in various electrolyte mixtures. Our results show that both solvent hard sphere diameter and density play a dominant role in the distribution of ions around spherical macroions, mainly for experimental water molarity and size values where the counterion distribution is characterized by a tight binding to the macroion, similar to that predicted by the Stern model.

Medasani, Bharat; Ovanesyan, Zaven; Thomas, Dennis G.; Sushko, Maria L.; Marucho, Marcelo

2014-05-29T23:59:59.000Z

163

Studying effects of Magnolol on alpha-particle induced bystander effects using PADC-film based dishes  

E-Print Network [OSTI]

short-lived radon progeny are the main contributor to the radiation dose derived from our natural- tion with lung cancer incidence (e.g., Pavia et al., 2003). Radon risks (from radon progeny) can

Yu, K.N.

164

Expert systems: A new approach to radon mitigation training and quality assurance  

SciTech Connect (OSTI)

Training radon mitigators and ensuring that they provide high-quality work on the scale necessary to reduce radon to acceptable levels in the large number of homes and schools requiring some mitigation is a challenging problem. The US Environmental Protection Agency and several states have made commendable efforts to train mitigators and ensure that they provide quality services to the public. Expert systems could be used to extend and improve the effectiveness of these efforts. The purpose of this paper is to introduce the radon community to this promising new technology. The paper includes a description of a prototype system developed by Pacific Northwest Laboratory that illustrates several of the capabilities that expert systems can provide, a brief explanation of how the prototype works, and a discussion of the potential roles and benefits of fully-developed expert systems for radon mitigation. 4 refs., 3 figs.

Brambley, M.R.; Hanlon, R.L.; Parker, G.B.

1990-07-01T23:59:59.000Z

165

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

SciTech Connect (OSTI)

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

166

Reevaluation of the Inadvertent Intruder, Groundwater, Air, and Radon Analyses for the Saltsone Disposal Facility  

SciTech Connect (OSTI)

The Special Analysis updates the inadvertent intruder analysis conducted in 1992 in support of the SDF RPA, extends the groundwater analysis to consider additional radionuclides, and provides an assessment of the air and radon emanation pathways.

Wilhite, E.L.

2003-01-15T23:59:59.000Z

167

Variation in the annual average radon concentration measured in homes in Mesa County, Colorado  

SciTech Connect (OSTI)

The purpose of this study is to examine the variability in the annual average indoor radon concentration. The TMC has been collecting annual average radon data for the past 5 years in 33 residential structures in Mesa County, Colorado. This report is an interim report that presents the data collected up to the present. Currently, the plans are to continue this study in the future. 62 refs., 3 figs., 12 tabs.

Rood, A.S.; George, J.L.; Langner, G.H. Jr.

1990-04-01T23:59:59.000Z

168

Industrial Technology of Decontamination of Liquid Radioactive Waste in SUE MosSIA 'Radon' - 12371  

SciTech Connect (OSTI)

SUE MosSIA 'RADON' - this enterprise was created more than 50 years ago, which deals with the recycling of radioactive waste and conditioning of spent sources of radiation in stationary and mobile systems in the own factory and operating organizations. Here is represented the experience SUE MosSIA 'Radon' in the field of the management with liquid radioactive waste. It's shown, that the activity of SUE MosSIA 'RADON' is developing in three directions - improvement of technical facilities for treatment of radioactive waters into SUE MosSIA 'RADON' development of mobile equipment for the decontamination of radioactive waters in other organizations, development of new technologies for decontamination of liquid radioactive wastes as part of various domestic Russian and international projects including those related to the operation of nuclear power and nuclear submarines. SUE MosSIA 'RADON' has processed more than 270 thousand m{sup 3} of radioactive water, at that more than 7000 m{sup 3} in other organizations for more than 50 years. It is shown that a number of directions, particularly, the development of mobile modular units for decontamination of liquid radioactive waste, SUE MosSIA 'RADON' is a leader in the world. (authors)

Adamovich, Dmitry V.; Neveykin, Petr P.; Karlin, Yuri V.; Savkin, Alexander E. [SUE MosSIA 'Radon', 7th Rostovsky lane 2/14, Moscow 119121 (Russian Federation)

2012-07-01T23:59:59.000Z

169

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

SciTech Connect (OSTI)

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

170

Radon in the DRIFT-II directional dark matter TPC: emanation, detection and mitigation  

E-Print Network [OSTI]

Radon gas emanating from materials is of interest in environmental science and also a major concern in rare event non-accelerator particle physics experiments such as dark matter and double beta decay searches, where it is a major source of background. Notable for dark matter experiments is the production of radon progeny recoils (RPRs), the low energy (~100 keV) recoils of radon daughter isotopes, which can mimic the signal expected from WIMP interactions. Presented here are results of measurements of radon emanation from detector materials in the 1 metre cubed DRIFT-II directional dark matter gas time projection chamber experiment. Construction and operation of a radon emanation facility for this work is described, along with an analysis to continuously monitor DRIFT data for the presence of internal 222Rn and 218Po. Applying this analysis to historical DRIFT data, we show how systematic substitution of detector materials for alternatives, selected by this device for low radon emanation, has resulted in a f...

Battat, J B R; Daw, E; Dorofeev, A; Ezeribe, A C; Fox, J R; Gauvreau, J -L; Gold, M; Harmon, L J; Harton, J L; Landers, J M; Lee, E R; Loomba, D; Matthews, J A J; Miller, E H; Monte, A; Murphy, A StJ; Paling, S M; Phan, N; Pipe, M; Robinson, M; Sadler, S W; Scarff, A; Snowden-Ifft, D P; Spooner, N J C; Telfer, S; Walker, D; Warner, D; Yuriev, L

2014-01-01T23:59:59.000Z

171

EEG alpha power and alpha power asymmetry in sleep and wakefulness  

E-Print Network [OSTI]

EEG alpha power and alpha power asymmetry in sleep and wakefulness RUTH M. BENCA,a,b WILLIAM H--Madison, USA Abstract Asymmetry of waking electroencephalography ~EEG! alpha power in frontal regions has been regarding alpha asymmetry during sleep. The present study was performed to compare alpha power and alpha

Wisconsin at Madison, University of

172

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

173

Description of Hot and Dense Hadron Gas Properties in a New Excluded-Volume model  

E-Print Network [OSTI]

A new equation of state for a hot and dense hadron gas (HG) is obtained where the finite hard-core size of baryons has been incorporated in a thermodynamically consistent formulation of excluded volume correction. Our model differs from other existing approaches on the following points. We assign a hard-core volume only to each baryon and mesons though possess a small volume but they can fuse and interpenetrate into one another. Use of the full quantum statistics is made in obtaining the grand canonical partition function where excluded-volume correction has been incorporated by explicitly integrating over volume. We thus find that the new model works even for the cases of extreme temperatures and/or densities where most of other approaches fail. The model does not violate causality even at extreme densities. The temperature and density dependence of various thermodynamical quantities, e.g. pressure, baryon density, entropy and energy density compare well with the results of other microscopic HG models. After suitable parametrization of the centre-of-mass energy in terms of temperature and baryon chemical potential, we explore some new freeze-out criteria which exhibit full independence of the collision energy and of the structures of the colliding nuclei. We further demonstrate the suitability of our model in explaining various experimental results of the multiplicity-ratios of various particles and their antiparticles. Finally, we use our excluded-volume model to obtain the transport behaviour of the hot and/or dense HG such as shear viscosity to entropy ratio, speed of sound etc. and compare the results with earlier calculations.

S. K. Tiwari; P. K. Srivastava; C. P. Singh

2011-11-10T23:59:59.000Z

174

alpha-particle-emitting radioimmunoconjugate 227th-rituximab...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Selahattin 5 Absorbed dose in target cell nuclei and dose conversion coefficient of radon progeny Biology and Medicine Websites Summary: Absorbed dose in target cell nuclei and...

175

Method for excluding salt and other soluble materials from produced water  

DOE Patents [OSTI]

A method for reducing the salinity, as well as the hydrocarbon concentration of produced water to levels sufficient to meet surface water discharge standards. Pressure vessel and coflow injection technology developed at the Oak Ridge National Laboratory is used to mix produced water and a gas hydrate forming fluid to form a solid or semi-solid gas hydrate mixture. Salts and solids are excluded from the water that becomes a part of the hydrate cage. A three-step process of dissociation of the hydrate results in purified water suitable for irrigation.

Phelps, Tommy J. (Knoxville, TN) [Knoxville, TN; Tsouris, Costas (Oak Ridge, TN) [Oak Ridge, TN; Palumbo, Anthony V. (Oak Ridge, TN) [Oak Ridge, TN; Riestenberg, David E. (Knoxville, TN) [Knoxville, TN; McCallum, Scott D. (Knoxville, TN) [Knoxville, TN

2009-08-04T23:59:59.000Z

176

Alpha Kappa Alpha Artificial Records, 1932-2000s  

E-Print Network [OSTI]

THE OTHER SIDE OF THE RAINBOW ..... -; ALPHA KAPPA ALPHA SORORITY DELTA CHAPTER A REAL POT OF GOLD LIFt" EV'RY vOICE AND SING Li.6,t eV'!LY vo-i.c.e and ~-i.ng, T-i...t ea-uh and heaVe.l1 iU'lg, KUla w-i.,th tne. hMmolUe!.> 06 Llbeuy; Lei oun. !Le60...

2015-01-01T23:59:59.000Z

177

The influence of salt aerosol on alpha radiation detection by WIPP continuous air monitors  

SciTech Connect (OSTI)

Alpha continuous air monitors (CAMs) will be used at the Waste Isolation Pilot Plant (WIPP) to measure airborne transuranic radioactivity that might be present in air exhaust or in work-place areas. WIPP CAMs are important to health and safety because they are used to alert workers to airborne radioactivity, to actuate air-effluent filtration systems, and to detect airborne radioactivity so that the radioactivity can be confined in a limited area. In 1993, the Environmental Evaluation Group (EEG) reported that CAM operational performance was affected by salt aerosol, and subsequently, the WIPP CAM design and usage were modified. In this report, operational data and current theories on aerosol collection were reviewed to determine CAM quantitative performance limitations. Since 1993, the overall CAM performance appears to have improved, but anomalous alpha spectra are present when sampling-filter salt deposits are at normal to high levels. This report shows that sampling-filter salt deposits directly affect radon-thoron daughter alpha spectra and overall monitor efficiency. Previously it was assumed that aerosol was mechanically collected on the surface of CAM sampling filters, but this review suggests that electrostatic and other particle collection mechanisms are more important than previously thought. The mechanism of sampling-filter particle collection is critical to measurement of acute releases of radioactivity. 41 refs.

Bartlett, W.T.; Walker, B.A.

1996-01-01T23:59:59.000Z

178

Effects of finite sampling and additive noise on image reconstruction from Radon transform  

SciTech Connect (OSTI)

The Radon transform arises naturally in the problem of reconstructing an image or cross section from line integral measurements through a specified object. Each line integral or ray is a sample of the Radon transform of the object and the set of all samples at a particular angle is called a projection or view. Consequently, the set of all possible samples at all possible projections in a particular plane constitutes the two-dimensional Radon transform. Of course, it is impossible to acquire an infinite number of data points for the purpose of image reconstruction. However, with a sufficient set of Radon transform samples, an images can be determined through various Radon transform inversion techniques. From this statement, however, arises the question of just what constitutes a sufficient set of Radon transform samples. Acquiring an insufficient number of samples results in various artifacts in the reconstructed image. On the other hand, taking too many samples utilizes the data inefficiently. Thus, the problem of interest is to determine the optimum number of projections and the optimum number of samples per projection required to adequately represent the Radon transform such that the image can be accurately reconstructed. The problem of image reconstruction is further complicated if noise is introduced in the projection domain. Noise may be caused by round-off error in the sampled projection data or by various other factors inherent in data acquisition processes. However, several filtering techniques can be implemented to suppress the effects of noise. Therefore, a second problem of interest is to study the effectiveness of different filtering techniques in noise suppression.

Tsujimoto, E.M. (California Univ., Davis, CA (USA))

1988-12-01T23:59:59.000Z

179

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]

. r 2006 Elsevier B.V. All rights reserved. PACS: 29.40; 23.60 Keywords: Radon progeny; Equilibrium-lived radon progeny contributes about half of the total exposure of human beings to ionizing radiation, but instead to its short-lived progeny. Exposure to radon progeny is measured through the product of PAEC ? t

Yu, K.N.

180

Nuclear Instruments and Methods in Physics Research A 450 (2000) 568}572 Uncertainty in radon measurements with CR39 detector  

E-Print Network [OSTI]

of the detector, i.e., detector sensitivity is dependent on the fraction of radon progeny decaying in the air prior to de- position. The behavior of radon progeny inside the cham- ber (as well as the aerosol of radon progeny decaying prior to deposition. The deposition frac- tion can depend on di

Yu, K.N.

Note: This page contains sample records for the topic "alpha excluding radon" 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

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

SciTech Connect (OSTI)

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

182

Radon in Soil Gas Above Bedrock Fracture Sets at the Shepleys Hill Superfund Site  

SciTech Connect (OSTI)

The Idaho National Laboratory (INL) recently provided technical support for ongoing environmental remediation activities at the Shepleys 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 Shepleys Hill site.

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

2012-12-01T23:59:59.000Z

183

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

SciTech Connect (OSTI)

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

184

Workshop on Precision Measurements of $\\alpha_s$  

SciTech Connect (OSTI)

These are the proceedings of the Workshop on Precision Measurements of {alpha}{sub s} held at the Max-Planck-Institute for Physics, Munich, February 9-11, 2011. The workshop explored in depth the determination of {alpha}{sub s}(m{sub Z}) in the {ovr MS} scheme from the key categories where high precision measurements are currently being made, including DIS and global PDF fits, {tau}-decays, electro-weak precision observables and Z-decays, event-shapes, and lattice QCD. These proceedings contain a short summary contribution from the speakers, as well as the lists of authors, conveners, participants, and talks.

Bethke, Siegfried; /Munich, Max Planck Inst.; Hoang, Andre H.; /Vienna U.; Kluth, Stefan; /Munich, Max Planck Inst.; Schieck, Jochen; /Munich U.; Stewart, Iain W.; Aoki, S.; Beneke, M.; Bethke, S.; Blumlein, J.; Brambilla, N.; Brodsky, S.; /MIT, LNS

2011-10-01T23:59:59.000Z

185

Asphalt emulsion radon barrier systems for uranium mill tailings: an overview of the technology  

SciTech Connect (OSTI)

Pacific Northwest Laboratory (PNL), under contract to the US Department of Energy (DOE) Uranium Mill Tailings Remedial Action Project (UMTRAP) office, has developed an asphalt emulsion cover system to reduce the release of radon from uranium mill tailings. The system has been field tested at Grand Junction, Colorado. Results from laboratory and field tests indicate that this system is effective in reducing radon release to near-background levels (<2.5 pCi m/sup -2/s/sup -1/) and has the properties required for long-term effectiveness and stability. Engineering specifications have been developed, and analysis indicates that asphalt emulsion covers are cost-competitive with other cover systems. This report summarizes the technology for asphalt emulsion radon barrier systems. 59 references, 45 figures, 36 tables.

Baker, E.G.; Hartley, J.N.; Freeman, H.D.; Gates, T.E.; Nelson, D.A.; Dunning, R.L.

1984-03-01T23:59:59.000Z

186

Alpha-nucleus potential for alpha-decay and sub-barrier fusion  

E-Print Network [OSTI]

The set of parameters for alpha-nucleus potential is derived by using the data for both the alpha-decay half-lives and the fusion cross-sections around the barrier for reactions alpha+40Ca, alpha+59Co, alpha+208Pb. The alpha-decay half-lives are obtained in the framework of a cluster model using the WKB approximation. The evaluated alpha-decay half-lives and the fusion cross-sections agreed well with the data. Fusion reactions between alpha-particle and heavy nuclei can be used for both the formation of very heavy nuclei and spectroscopic studies of the formed compound nuclei.

V. Yu. Denisov; H. Ikezoe

2005-10-27T23:59:59.000Z

187

Alpha radiation is a major germ-line mutagen over evolutionary timescales  

E-Print Network [OSTI]

is caused by radon progeny. Exposure is particularly high below ground, and is also elevated on plant

Ross, Kenneth A.

188

Analysis of infiltration through a clay radon barrier at an UMTRA disposal cell. Uranium Mill Tailings Remedial Action Project  

SciTech Connect (OSTI)

An infiltration study was initiated in January 1988 to assess the percent saturation in, and infiltration through, clay radon barriers of typical Uranium Mill Tailings Remedial Action (UMTRA) Project disposal cells. Predicting infiltration through the radon barrier is necessary to evaluate whether the disposal cell will comply with the proposed US Environmental Protection Agency (EPA) groundwater protection standards (40 CFR 192). The groundwater standards require demonstrating that tailings seepage will not cause background concentrations or maximum concentration limits (MCLs) to be exceeded at the downgradient edge of the disposal facility (the point of compliance, or POC). This demonstration generally consists of incorporating the predicted seepage flux and the concentration of the specific hazardous constituents into a contaminant transport model, and predicting the resultant concentrations at the POC. The infiltration study consisted of a field investigation to evaluate moisture conditions in the radon barrier of the completed Shiprock, New Mexico, UMTRA Project disposal cell and previously completed UMTRA Project disposal cells at Clive, Utah, and Burrell, Pennsylvania. Coring was conducted to measure percent saturation profiles in the radon barriers at these disposal cells. In addition, a detailed investigation of the Shiprock radon barrier was conducted to establish the effects of meteorological stresses on moisture conditions in the filter layer and radon barrier. The Shiprock infiltration study was also intended to characterize hydraulic gradients and operational unsaturated hydraulic conductivities in the radon barrier.

Not Available

1991-01-01T23:59:59.000Z

189

Short communication On the use of the Radon Transform in studying nearshore wave dynamics  

E-Print Network [OSTI]

shallow water domain, the celerity of short waves is a key kinematic variable to describe energy fluxesShort communication On the use of the Radon Transform in studying nearshore wave dynamics Rafael 23 June 2014 Available online xxxx Keywords: Surf zone Wave transformation Wave propagation

190

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

SciTech Connect (OSTI)

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

191

Four Years of Practical Arrangements between IAEA and Moscow SIA 'Radon': Preliminary Results - 13061  

SciTech Connect (OSTI)

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 15 years. Since 1997, the educational system of the enterprise with the support of the IAEA has acquired an international character: more than 470 experts from 35 countries- IAEA Member States completed the professional development. Training is conducted at various thematic courses or fellowships for individual programs and seminars on IAEA technical projects. In June 2008 a direct agreement (Practical Arrangements) was signed between SIA 'Radon' and the IAEA on cooperation in the field of development of new technologies, expert's advice to IAEA Member States, and, in particular, the training of personnel in the field of radioactive waste management (RWM), which opens up new perspectives for fruitful cooperation of industry professionals. The paper summarizes the current experience of the SIA 'Radon' in the organization 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.; Karlina, O.K.; Neveikin, P.P. [SUE SIA 'Radon', The 7-th Rostovsky Lane 2/14, Moscow, 119121 (Russian Federation)] [SUE SIA 'Radon', The 7-th Rostovsky Lane 2/14, Moscow, 119121 (Russian Federation)

2013-07-01T23:59:59.000Z

192

Seismic imaging with the generalized Radon transform: A curvelet transform perspective  

E-Print Network [OSTI]

Seismic imaging with the generalized Radon transform: A curvelet transform perspective M V de Hoop1@purdue.edu Abstract. A key challenge in the seismic imaging of reflectors using surface reflection data. Introduction 1.1. Seismic Imaging with Arrays ­ Beyond Current Capabilities Much research in modern

Smith, Hart F.

193

AIR AND RADON PATHWAY MODELING FOR THE F AREA TANK FARM  

SciTech Connect (OSTI)

An air and radon pathways analysis was conducted for the F-Area Tank Farm (FTF) to estimate the flux of volatile radionuclides and radon at the ground surface due to residual waste remaining in the tanks following closure. This analysis was used as the basis to estimate the dose to the maximally exposed individual (MEI) for the air pathway per Curie (Ci) of each radionuclide remaining in the combined FTF waste tanks. For the air pathway analysis, several gaseous radionuclides were considered. These included carbon-14 (C-14), chlorine-36 (Cl-36), iodine-129 (I-129), selenium-79 (Se-79), antimony-125 (Sb-125), tin-126 (Sn-126), tritium (H-3), and technetium-99 (Tc-99). The dose to the MEI was estimated at the SRS Boundary during the 100 year institutional control period. For the 10,000 year post closure compliance period, the dose to the MEI was estimated at the 100 m compliance point. Additionally, the dose to the MEI was estimated at a seepage outcrop located 1600 m from the facility. For the radon pathway analysis, five parent radionuclides and their progeny were analyzed. These parent radionuclides included uranium-238 (U-238), plutonium-238 (Pu-238), uranium-234 (U-234), thorium-230 (Th-230), and radium-226 (Ra-226). The peak flux of radon-222 due to each parent radionuclide was estimated for the simulation period of 10,100 years.

Dixon, K.; Phifer, M.

2010-07-30T23:59:59.000Z

194

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

195

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

196

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

SciTech Connect (OSTI)

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

197

The effect of radon-resistant construction techniques in a crawlspace house  

SciTech Connect (OSTI)

An extensive battery of radon-diagnostic tests were performed on two different houses built on the SAME foundation. A house was studied as part of a multi-year evaluation of radon mitigation measures in the Tennessee Valley. The original house was destroyed in a fire caused by a faulty space heater. The second house was built on the same foundation using passive techniques to reduce radon transport via the crawlspace to the living area. The rebuilt house achieved a 60% reduction in the volumetric transport of air from crawlspace to living area when the heating and cooling system was not operating. An even greater reduction was found when the HAC system was operating, reflecting the benefits of new, well-sealed ductwork. In spite of these enhancements, the passive measures failed to reduce radon concentrations to below 4 pCi/L. The primary reason is believed to be the enclosure of the open carport to form a garage at the time of reconstruction.

Dudney, C S; Wilson, D L [Oak Ridge National Lab., TN (United States)] [Oak Ridge National Lab., TN (United States); Dyess, T M [US Environmental Protection Agency, Air & Energy Engineering Research Lab., Research Triangle Park, NC (United States)] [US Environmental Protection Agency, Air & Energy Engineering Research Lab., Research Triangle Park, NC (United States)

1992-09-01T23:59:59.000Z

198

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

199

alpha inhalation exposure: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

This work describes a pilot study to calculate lung dose from the deposition of radon progeny, via estimates of cumulative exposure derived from in vivo measurements of sup 2...

200

Alpha  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAbout theOFFICE OF RESEARCHThermal SolarAllocatio YearIndustrialOeffect of

Note: This page contains sample records for the topic "alpha excluding radon" 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

Recoil-alpha-fission and recoil-alpha-alpha-fission events observed in the reaction Ca-48 + Am-243  

E-Print Network [OSTI]

Products of the fusion-evaporation reaction Ca-48 + Am-243 were studied with the TASISpec set-up at the gas-filled separator TASCA at the GSI Helmholtzzentrum f\\"ur Schwerionenforschung. Amongst the detected thirty correlated alpha-decay chains associated with the production of element Z=115, two recoil-alpha-fission and five recoil-alpha-alpha-fission events were observed. The latter are similar to four such events reported from experiments performed at the Dubna gas-filled separator. Contrary to their interpretation, we propose an alternative view, namely to assign eight of these eleven decay chains of recoil-alpha(-alpha)-fission type to start from the 3n-evaporation channel 115-288. The other three decay chains remain viable candidates for the 2n-evaporation channel 115-289.

U. Forsberg; D. Rudolph; L. -L. Andersson; A. Di Nitto; Ch. E. Dllmann; J. M. Gates; P. Golubev; K. E. Gregorich; C. J. Gross; R. -D. Herzberg; F. P. Hessberger; J. Khuyagbaatar; J. V. Kratz; K. Rykaczewski; L. G. Sarmiento; M. Schdel; A. Yakushev; S. berg; D. Ackermann; M. Block; H. Brand; B. G. Carlsson; D. Cox; X. Derkx; J. Dobaczewski; K. Eberhardt; J. Even; C. Fahlander; J. Gerl; E. Jger; B. Kindler; J. Krier; I. Kojouharov; N. Kurz; B. Lommel; A. Mistry; C. Mokry; W. Nazarewicz; H. Nitsche; J. P. Omtvedt; P. Papadakis; I. Ragnarsson; J. Runke; H. Schaffner; B. Schausten; Y. Shi; P. Thrle-Pospiech; T. Torres; T. Traut; N. Trautmann; A. Trler; A. Ward; D. E. Ward; N. Wiehl

2015-02-10T23:59:59.000Z

202

High gas flow alpha detector  

DOE Patents [OSTI]

An alpha detector for application in areas of high velocity gas flows, such as smokestacks and air vents. A plurality of spaced apart signal collectors are placed inside an enclosure, which would include smokestacks and air vents, in sufficient numbers to substantially span said enclosure so that gas ions generated within the gas flow are electrostatically captured by the signal collector means. Electrometer means and a voltage source are connected to the signal collectors to generate an electrical field between adjacent signal collectors, and to indicate a current produced through collection of the gas ions by the signal collectors. 4 figs.

Bolton, R.D.; Bounds, J.A.; Rawool-Sullivan, M.W.

1996-05-07T23:59:59.000Z

203

High gas flow alpha detector  

DOE Patents [OSTI]

An alpha detector for application in areas of high velocity gas flows, such as smokestacks and air vents. A plurality of spaced apart signal collectors are placed inside an enclosure, which would include smokestacks and air vents, in sufficient numbers to substantially span said enclosure so that gas ions generated within the gas flow are electrostatically captured by the signal collector means. Electrometer means and a voltage source are connected to the signal collectors to generate an electrical field between adjacent signal collectors, and to indicate a current produced through collection of the gas ions by the signal collectors.

Bolton, Richard D. (Los Alamos, NM); Bounds, John A. (Los Alamos, NM); Rawool-Sullivan, Mohini W. (Los Alamos, NM)

1996-01-01T23:59:59.000Z

204

Alpha Technologies | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160 East 300Algoil Jump to:Information332Information 922Altair Energy JumpAlpha

205

Local Varying-Alpha Theories  

E-Print Network [OSTI]

In a recent paper we demonstrated how the simplest model for varying alpha may be interpreted as the effect of a dielectric material, generalized to be consistent with Lorentz invariance. Unlike normal dielectrics, such a medium cannot change the speed of light, and its dynamics obey a Klein-Gordon equation. This work immediately suggests an extension of the standard theory, even if we require compliance with Lorentz invariance. Instead of a wave equation, the dynamics may satisfy a local algebraic relation involving the permittivity and the properties of the electromagnetic field, in analogy with more conventional dielectric (but still preserving Lorentz invariance). We develop the formalism for such theories and investigate some phenomenological implications. The problem of the divergence of the classical self-energy can be solved, or at least softened, in this framework. Some interesting new cosmological solutions for the very early universe are found, including the possibility of a bounce, inflation and expansion with a loitering phase, all of which are induced by early variations in alpha.

John D. Barrow; Joao Magueijo

2015-01-30T23:59:59.000Z

206

Overview Of The Unattached Fraction of Radon Prouenv and It's Significance To Luna Dosimetrv.  

E-Print Network [OSTI]

The health risk arising from exposure to radon progeny is strongly related to the deposition of radon progeny in the lungs. It is believed that greater risk is related to the unattached fraction. Achievement of accurate estimations of the radiation dose to the lungs, requires knowledge of both the size and concentration of the unattached fraction. In spite of the capabilities available today to obtain this data, several fundamental issues still need to be resolved. Most notably: l)A clear and universally accepted clarification of precisely how the unattached fraction is to be defined, 2)Development of standardized measurement instrumentation for the detection of unattached fractions. Only then can meaningful scientific comparisons be made. The complex issues surrounding the unattached fraction and

Dr. A. Singmin

207

Radon backgrounds in the DRIFT-II directional dark matter experiments  

E-Print Network [OSTI]

Low pressure gas Time Projection Chambers being developed for directional Dark Matter searches offer a technology with high particle identification power, combined with poten- tial to produce a definitive detection of galactic Weakly Interacting Massive Particle (WIMP) Dark Matter. A source of background events in such experiments, able to mimic genuine WIMP in- duced nuclear recoil tracks, arises from potential radon contamination and the recoils that result from associated daughter nuclei, termed Radon Progeny Recoils (RPRs). We present here experi- mental data from a long-term study of this background using the DRIFT-II directional dark matter experiment at the Boulby Underground Laboratory. By detailed examination of event classes in both spatial and time coordinates using 5.5 years of data we show ability to determine the origin of 4 specific background populations and describe development of new technology and mitigation strategies to suppress them.

Daw, E; Gauvreau, J -L; Gold, M; Harmon, L J; Landers, J M; Lee, E R; Loomba, D; Miller, E H; Murphy, A StJ; Paling, S M; Pipe, M; Robinson, M; Sadler, S; Scarff, A; Snowden-Ifft, D P; Spooner, N J C; Walker, D

2013-01-01T23:59:59.000Z

208

SHOE V.1.5 ALPHA  

Energy Science and Technology Software Center (OSTI)

002913MLTPL00 Sandia Higher Order Elements (SHOE) v 0.5 alpha http://midas3.kitware.com/midas/folder/10328

209

E-Print Network 3.0 - alpha-macroglobulin rat alpha Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

hormones such as ACTH, corticosterone, cytokines of IL-1beta, IL-6, and TNF-alpha in CIA rats were... .4. Diurnal variations of IL-1beta, TNF-alpha and IL-6 In our study, serum...

210

E-Print Network 3.0 - alpha hnf-3alpha negatively Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Page: << < 1 2 3 4 5 > >> Page: << < 1 2 3 4 5 > >> 41 ALPHA CHANNELING IN MIRROR MACHINES AND IN TOKAMAKS Nathaniel J. Fisch Summary: ALPHA CHANNELING IN MIRROR MACHINES AND...

211

U.S. Postal Service radon assessment and mitigation program. Progress report, September 1993--November 1994  

SciTech Connect (OSTI)

In 1992, the US Postal Service (USPS) entered into an Interagency Agreement with the Department of Energy (DOE) whereby DOE would provide technical assistance in support of the USPS Radon Assessment and Mitigation Program. To aid in this effort, DOE tasked the Hazardous Waste Remedial Actions Program (HAZWRAP), which is managed by Martin Marietta Energy Systems, Inc., for DOE under contract AC05-84OR21400. Since that time, HAZWRAP has developed and finalized the sampling protocol, mitigation diagnostic protocol, and the quality assurance and quality control procedures. These procedures were validated during the Protocol Validation (1992-1993) and Pilot Study (1993-1994) phases of the program. To date, HAZWRAP has performed approximately 16,000 radon measurements in 250 USPS buildings. Mitigation diagnostics have been performed in 27 buildings. Thus far, 13% of the measurements have been above the Environmental Protection Agency action level of 4 pCi/L. This report summarizes the pilot program radon testing data and mitigation diagnostic data for 22 sites and contains recommendations for mitigation diagnostics.

Velazquez, L.E.; Petty, J.L. Jr.

1994-12-31T23:59:59.000Z

212

Low Radioactive Techniques in SuperNEMO: Status of the Radon R and D  

SciTech Connect (OSTI)

Radon is a well-known source of background with respect to the search for neutrinoless double beta decay (0{nu}{beta}{beta}), due to the high Q{sub {beta}} value of one of its daughter nucleus {sup 214}Bi. Radon has been observed and reduced down to 6.5 mBq/m{sup 3} in the NEMO-3 experiment which is looking for the 0{nu}{beta}{beta} process in {sup 100}Mo and in six other isotopes. The SuperNEMO project, a next-generation double beta decay experiment which will also use a tracko-calorimeter technique, has been in an R and D phase since 2006. The goal is to reach a sensitivity of T{sub 1/2}(0{nu})>10{sup 26} y corresponding to an effective Majorana neutrino mass of 0.05-0.1 eV with 100 kg of {sup 82}Se. Such a sensitivity requires in particular to improve the radon radiopurity down to 0.1 mBq/m{sup 3} in the tracking chamber.

Perrot, F. [Universite de Bordeaux, Centre d'Etudes Nucleaires de Bordeaux Gradignan, UMR 5797, Chemin du Solarium, Le Haut-Vigneau, BP120, F-33175 Gradignan (France); CNRS/IN2P3, Centre d'Etudes Nucleaires de Bordeaux Gradignan, UMR 5797, Chemin du Solarium, Le Haut-Vigneau, BP120, F-33175 Gradignan (France)

2011-04-27T23:59:59.000Z

213

Modifiers of Exposure-Response Estimates for Lung Cancer among Miners Exposed to Radon Progeny  

E-Print Network [OSTI]

The association between lung cancer and exposure to radon decay products has been well established. Despite agreement on this point, there is still some degree of uncertainty regarding characteristics of the exposure-response relationship. The use of studies of underground miners to estimate lung cancer risks due to residential radon exposure depends upon a better understanding of factors potentially modifying the exposure-response relationship. Given the diversity in study populations regarding smoking status, mining conditions, risk analysis methodology, and referent populations, the risk estimates across studies are quite similar. However, several factors partially contributing to differences in risk estimates are modified by attained age, time since last exposure, exposure rate, and cigarette smoking patterns. There is growing agreement across studies that relative risk decreases with attained age and time since last exposure. Several studies have also found an inverse exposure-rate effect, i.e., low exposure rates for protracted duration of exposure are more hazardous than equivalent cumulative exposures received at higher rates for shorter periods of time. Additionally, the interaction between radon exposure and cigarette smoking appears to be intermediate between additive and multiplicative in a growing number of studies. Quantitative estimates of these modifying factors are given using a new analysis of data from the latest update of the Colorado Plateau uranium miners cohort.- Environ Health Perspect 1 03(Suppl 2):49-53 (1995)

Richard W. Hornung; James Deddens; Robert Roscoe

214

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 (OSTI)

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

215

Assessment of inhalation and ingestion doses from exposure to radon gas using passive and active detecting techniques  

SciTech Connect (OSTI)

The aim of this study was to assess an environmental hazard of radon exhalation rate from the samples of soil and drinking water in selected locations in Iraqi Kurdistan, passive (CR-39NTDs) and active (RAD7) detecting techniques has been employed. Long and short term measurements of emitted radon concentrations were estimated for 124 houses. High and lower radon concentration in soil samples was in the cities of Hajyawa and Er. Tyrawa, respectively. Moreover, for drinking water, high and low radon concentration was in the cities of Similan and Kelak, respectively. A comparison between our results with that mentioned in international reports had been done. Average annual dose equivalent to the bronchial epithelium, stomach and whole body in the cities of Kelak and Similan are estimated, and it was varied from 0.04{+-}0.01 mSv to 0.547{+-}0.018 mSv, (2.832{+-}0.22)x10{sup -5} to (11.972{+-}2.09)x10{sup -5} mSv, and (0.056 {+-}0.01) x10{sup -5} to (0.239{+-}0.01)x10{sup -5} mSv, respectively. This indicated that the effects of dissolved radon on the bronchial epithelium are much than on the stomach and whole body. (authors)

Ismail, A. H.; Jafaar, M. S. [Universiti Sains Malaysia, 11800 USM, Penang (Malaysia)

2011-07-01T23:59:59.000Z

216

alpha inducido por: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

present review provides an update on alphas measurements from the past year. W. J. Stirling 1997-09-23 5 ALPHA OMEGA ALPHA National Honor Medical Society Biology and Medicine...

217

alpha kaudu transleeritavatest: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

present review provides an update on alphas measurements from the past year. W. J. Stirling 1997-09-23 3 ALPHA OMEGA ALPHA National Honor Medical Society Biology and Medicine...

218

alpha muzka ostajotsja: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

present review provides an update on alphas measurements from the past year. W. J. Stirling 1997-09-23 3 ALPHA OMEGA ALPHA National Honor Medical Society Biology and Medicine...

219

ALPHA-DECAY STUDIES IN THE HEAVY-ELEMENT REGION  

E-Print Network [OSTI]

231, Curium-242, and Americium-241 (Thesis), AECU-2757 (rimental Results A. Alpha Decay of Americium-243 L Alpha-Particle Energy of Americium-243 New Alpha Groups of

Hummel, John Philip

2010-01-01T23:59:59.000Z

220

High K-alpha X-ray Conversion Efficiency From Extended Source Gas Jet Targets Irradiated by Ultra Short Laser Pulses  

SciTech Connect (OSTI)

The absolute laser conversion efficiency to K{sub {alpha}}-like inner shell x-rays (integrated from K{sub {alpha}} to K{sub {beta}}) is observed to be an order of magnitude higher in argon gas jets than in solid targets due to enhanced emission from higher ionization stages following ultra short pulse laser irradiation. Excluding the higher ionization stages, the conversion efficiency to near-cold K{sub {alpha}} is the same in gas jets as in solid targets. These results demonstrate that gas jet targets are bright, high conversion efficiency, high repetition rate, debris-free multi-keV x-ray sources for spectrally resolved scattering and backlighting of rapidly evolving dense matter.

Kugland, N L; Constantin, C; Collette, A; Dewald, E; Froula, D; Glenzer, S H; Kritcher, A; Neumayer, P; Ross, J S; Niemann, C

2007-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "alpha excluding radon" 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

E-Print Network 3.0 - alpha continuous air Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

; Environmental Sciences and Ecology ; Biology and Medicine 3 A study of the polyethylene membrane used in diffusion chambers for radon gas concentration measurements...

222

E-Print Network 3.0 - alpha-particle-emitting isotope 259db Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Department of Chemistry, Texas A&M University Collection: Physics 2 A study of the polyethylene membrane used in diffusion chambers for radon gas concentration measurements...

223

alpha-particle-emitting 211at-labeled trastuzumab: Topics by...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

10 Absorbed dose in target cell nuclei and dose conversion coefficient of radon progeny Biology and Medicine Websites Summary: Absorbed dose in target cell nuclei and...

224

alpha iib beta: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Yu. G. Zdesenko 2004-04-13 9 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Physics Websites Summary: Alpha...

225

alpha trihydroxy-5 beta: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Yu. G. Zdesenko 2004-04-13 7 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Physics Websites Summary: Alpha...

226

alpha implication des: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

XI, Universit de 3 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Physics Websites Summary: Alpha...

227

alpha gross beta: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Yu. G. Zdesenko 2004-04-13 14 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Physics Websites Summary: Alpha...

228

alpha beta forms: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

R. Williamson 2005-04-04 14 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Physics Websites Summary: Alpha...

229

CRAD, Safety Basis - Oak Ridge National Laboratory TRU ALPHA...  

Broader source: Energy.gov (indexed) [DOE]

Safety Basis - Oak Ridge National Laboratory TRU ALPHA LLWT Project CRAD, Safety Basis - Oak Ridge National Laboratory TRU ALPHA LLWT Project November 2003 A section of Appendix C...

230

CRAD, Quality Assurance - Oak Ridge National Laboratory TRU ALPHA...  

Broader source: Energy.gov (indexed) [DOE]

Quality Assurance - Oak Ridge National Laboratory TRU ALPHA LLWT Project CRAD, Quality Assurance - Oak Ridge National Laboratory TRU ALPHA LLWT Project November 2003 A section of...

231

CRAD, Management - Oak Ridge National Laboratory TRU ALPHA LLWT...  

Broader source: Energy.gov (indexed) [DOE]

Management - Oak Ridge National Laboratory TRU ALPHA LLWT Project CRAD, Management - Oak Ridge National Laboratory TRU ALPHA LLWT Project November 2003 A section of Appendix C to...

232

alpha energy measurements: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

with ATLAS Jet Production Measurements. CERN Preprints Summary: An inclusive jet multiplicity ratio is sensitive to the strong coupling constant, alphaS and has reduced...

233

(Data in thousand metric tons of silicon content unless otherwise noted) Domestic Production and Use: Estimated value of silicon alloys and metal (excluding semiconductor-and solar-  

E-Print Network [OSTI]

Production and Use: Estimated value of silicon alloys and metal (excluding semiconductor- and solar- grade and aluminum alloys and the chemical industry. The semiconductor and solar industries, which manufacture chips China, 49%; Russia, 20

234

Nuclear diagnostic for fast alpha particles  

DOE Patents [OSTI]

This invention relates generally to high energy confined plasmas and more particularly is directed to measuring the velocity distribution of confined energetic alpha particles resulting from deuterium-tritium fusion reactions in a confined energetic plasma.

Grisham, L.R.; Post, D.E. Jr.; Dawson, J.M.

1983-11-23T23:59:59.000Z

235

AIR AND RADON PATHWAY MODELING FOR THE F-AREA TANK FARM  

SciTech Connect (OSTI)

The F-Area Tank Farm (FTF) is located within F-Area in the General Separations Area (GSA) of the Savannah River Site (SRS) as seen in Figure 1. The GSA contains the F and H Area Separations Facilities, the S-Area Defense Waste Processing Facility, the Z-Area Saltstone Facility, and the E-Area Low-Level Waste Disposal Facilities. The FTF is a nearly rectangular shaped area and comprises approximately 20 acres, which is bounded by SRS coordinates N 76,604.5 to N 77,560.0 and E 52,435.0 to E 53,369.0. SRS is in the process of preparing a Performance Assessment (PA) to support FTF closure. As part of the PA process, an analysis was conducted to evaluate the potential magnitude of gaseous release of radionuclides from the FTF over the 100-year institutional control period and 10,000-year post-closure compliance period. Specifically, an air and radon pathways analysis has been conducted to estimate the flux of volatile radionuclides and radon at the ground surface due to residual waste remaining in the tanks following closure. This analysis was used as the basis to estimate the dose to the maximally exposed individual (MEI) for the air pathway per Curie (Ci) of each radionuclide remaining in the combined FTF waste tanks. For the air pathway analysis, several gaseous radionuclides were considered. These included carbon-14 (C-14), chlorine-36 (Cl-36), iodine-129 (I-129), selenium-79 (Se-79), antimony-125 (Sb-125), tin-126 (Sn-126), tritium (H-3), and technetium-99 (Tc-99). The dose to the MEI was estimated at the SRS Boundary during the 100 year institutional control period. For the 10,000 year post closure compliance period, the dose to the MEI was estimated at the 100 m compliance point. For the radon pathway analysis, five parent radionuclides and their progeny were analyzed. These parent radionuclides included uranium-238 (U-238), plutonium-238 (Pu-238), uranium-234 (U-234), thorium-230 (Th-230), and radium-226 (Ra-226). The peak flux of radon-222 due to each parent radionuclide was estimated for the simulation period of 10,100 years.

Dixon, K; Mark Phifer, M

2007-09-17T23:59:59.000Z

236

DOSES IN HUMAN ORGANS DUE TO ALPHA, BETA AND GAMMA RADIATIONS EMITTED BY THORON PROGENY IN  

E-Print Network [OSTI]

progeny than that of the radon progeny. It is interesting to note that after the lungs, where body. The DCF to other organs was obtained as 20 mSv WLM­1 , which is larger than the DCF for radon progeny, which was 13 mSv WLM­1 . This is a consequence of the longer half-life of the relevant thoron

Yu, K.N.

237

Characteristics of a radon diffusion chamber with electrical collection using plastic nuclear track detectors. Open file report 31 August 1982-30 November 1983  

SciTech Connect (OSTI)

A portable radon diffusion chamber was tested with electrical collection of radon daughter nuclei for enhancement of sensitivity. The detector was small enough to be worn suspended from a belt. With a battery-supplied high voltage, the sensitivity was found to be 1.43 tracks/sq cm per pCi-h/lambda of ambient radon at 50% relative humidity. The track densities on the surfaces of the CR-39 plastic nuclear track detectors were found to be nonuniform, making the determination of average densities with high accuracy difficult. The fabrication of electrets for use in the detector was investigated in accordance with published techniques with negative results.

Frank, A.L.; Benton, E.V.

1982-09-01T23:59:59.000Z

238

Biogenic radon emission from uranium mine tailings: A consequence of microbial leaching  

SciTech Connect (OSTI)

Two uranium mine waste heaps near Ronneburg, Germany, were investigated for the occurrence of lithotrophic and chemoorganotrophic leach bacteria. The evaluation of 162 samples (= to 5m depth) resulted in the finding that Thiobacillus (T.) ferrooxidans dominated up to a depth of about 1.5m. Below, T. intermedius/neapolitanus were the most abundant lithotrophs. Pyrite, however, was the only nutrient source in the heaps. Consequently, the latter lithotrophs must have had another source of nutrient. We recently demonstrated leaching to proceed only via the indirect mechanism with thiosulfate and ferrous hexahydrate as the first degradation products. Thiosulfate is the best nutrient for T. intermedius/neapolitanus. In addition, the highest emission of radon, measured as radioactivity 1m above the heap surface, correlated with the highest cell counts of T. Ferrooxidans. Considering the diagenesis of the ore (precipitation of uranite followed by pyrite) a leach pore model was hypothesized explaining the correlation. Accordingly, the biological removal of pyrite allows the trapped radon to escape from the pore.

Sand, W. [Univ. of Hamburg (Germany)

1995-12-31T23:59:59.000Z

239

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

240

Estimated effective dose rates from radon exposure in workplaces and residences within Los Alamos county in New Mexico  

SciTech Connect (OSTI)

Many millions of office workers are exposed to radon while at work and at home. Though there has been a multitude of studies reporting the measurements of radon concentrations and potential lung and effective doses associated with radon and progeny exposure in homes, similar studies on the concentrations and subsequent effective dose rates in the workplace are lacking. The purposes of this study were to measure radon concentrations in office and residential spaces in the same county and explore the radiation dose implications. Sixty-five track-etch detectors were deployed in office spaces and 47 were deployed in residences, all within Los Alamos County, New Mexico, USA. The sampling periods for these measurements were generally about three months. The measured concentrations were then used to calculate and compare effective dose rates resulting from exposure while at work and at home. Results showed that full-time office workers receive on average about nine times greater exposure at home than while in the office (691 mrem yr{sup -1} versus 78 mrem yr{sup -1}). The estimated effective dose rate for a more homebound person was 896 mrem yr{sup -1}. These effective dose rates are contrasted against the 100 mrem yr{sup -1} threshold for regulation of a 'radiological worker' defined in the Department of Energy regulations occupational exposure and the 10 mrem yr{sup -1} air pathway effective public dose limit regulated by the Environmental Protection Agency.

Whicker, Jeffrey J [Los Alamos National Laboratory; Mcnaughton, Michael [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "alpha excluding radon" 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

Identification of the brightest Ly\\alpha\\ emitters at z=6.6: implications for the evolution of the luminosity function in the re-ionisation era  

E-Print Network [OSTI]

Using wide field narrow-band surveys, we provide a new measurement of the $z=6.6$ Lyman-$\\alpha$ Emitter (LAE) luminosity function (LF), which constraints the bright end for the first time. We use a combination of archival narrow-band NB921 data in UDS and new NB921 measurements in SA22 and COSMOS/UltraVISTA, all observed with the Subaru telescope, with a total area of $\\sim 5$ deg$^2$. We exclude lower redshift interlopers by using broad-band optical and near-infrared photometry and also exclude three supernovae with data split over multiple epochs. We spectroscopically confirm the two most luminous Ly$\\alpha$ emitters ever found at $z=6.604$ and $6.541$ in the COSMOS field using Keck/DEIMOS and VLT/FORS2. Combining the UDS and COSMOS samples we find no evolution of the bright end of the Ly$\\alpha$ LF between $z=5.7$ and $6.6$, which is supported by spectroscopic follow-up, and conclude that \\emph{Himiko}-like sources are not as rare as previously thought, with number densities of $\\sim 1.5\\times10^{-5}$ Mpc...

Matthee, Jorryt; Santos, Srgio; Rttgering, Huub; Darvish, Behnam; Mobasher, Bahram

2015-01-01T23:59:59.000Z

242

Nuclear diagnostic for fast alpha particles  

DOE Patents [OSTI]

Measurement of the velocity distribution of confined energetic alpha particles resulting from deuterium-tritium fusion reactions in a magnetically contained plasma is provided. The fusion plasma is seeded with energetic boron neutrals for producing, by means of the reaction .sup.10 B (.alpha.,n) .sup.13 N reaction, radioactive nitrogen nuclei which are then collected by a probe. The radioactivity of the probe is then measured by conventional techniques in determining the energy distribution of the alpha particles in the plasma. In a preferred embodiment, diborane gas (B.sub.2 H.sub.6) is the source of the boron neutrals to produce .sup.13 N which decays almost exclusively by positron emission with a convenient half-life of 10 minutes.

Grisham, Larry R. (Lawrence Township, Mercer County, NJ); Post, Jr., Douglass E. (Belle Mead, NJ); Dawson, John M. (Pacific Palisades, CA)

1986-01-01T23:59:59.000Z

243

Exotic decay model and alpha decay studies  

SciTech Connect (OSTI)

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

244

Alternating current long range alpha particle detector  

DOE Patents [OSTI]

An alpha particle detector, utilizing alternating currents, which is capable of detecting alpha particles from distinct sources. The use of alternating currents allows use of simpler ac circuits which, in turn, are not susceptible to dc error components. It also allows the benefit of gas gain, if desired. In the invention, a voltage source creates an electric field between two conductive grids, and between the grids and a conductive enclosure. Air containing air ions created by collision with alpha particles is drawn into the enclosure and detected. In some embodiments, the air flow into the enclosure is interrupted, creating an alternating flow of ions. In another embodiment, a modulated voltage is applied to the grid, also modulating the detection of ions.

MacArthur, D.W.; McAtee, J.L.

1993-02-16T23:59:59.000Z

245

Synthesis of peptide .alpha.-thioesters  

DOE Patents [OSTI]

Disclosed herein is a new method for the solid phase peptide synthesis (SPPS) of C-terminal peptide .alpha. thioesters using Fmoc/t-Bu chemistry. This method is based on the use of an aryl hydrazine linker, which is totally stable to conditions required for Fmoc-SPPS. When the peptide synthesis has been completed, activation of the linker is achieved by mild oxidation. The oxidation step converts the acyl-hydrazine group into a highly reactive acyl-diazene intermediate which reacts with an .alpha.-amino acid alkylthioester (H-AA-SR) to yield the corresponding peptide .alpha.-thioester in good yield. A variety of peptide thioesters, cyclic peptides and a fully functional Src homology 3 (SH3) protein domain have been successfully prepared.

Camarero, Julio A. (Livermore, CA); Mitchell, Alexander R. (Livermore, CA); De Yoreo, James J. (Clayton, CA)

2008-08-19T23:59:59.000Z

246

Energy production in varying {\\alpha} theories  

E-Print Network [OSTI]

Aims. On the basis the theoretical model proposed by Bekenstein for {\\alpha}'s variation, we analyze the equations that describe the energy exchange between matter and both the electromagnetic and the scalar fields. Methods. We determine how the energy flow of the material is modified by the presence of a scalar field. We estimate the total magnetic energy of matter from the "sum rules techniques". We compare the results with data obtained from the thermal evolution of the Earth and other planets. Results. We obtain stringent upper limits to the variations in {\\alpha} that are comparable with those obtained from atomic clock frequency variations. Conclusions. Our constraints imply that the fundamental length scale of Bekenstein's theory "lB" cannot be larger than Planck's length "lP".

Kraiselburd, Lucila; Sisterna, Pablo; Vucetich, Hctor; 10.1051/0004-6361/201015970

2011-01-01T23:59:59.000Z

247

Radiological hazards of alpha-contaminated waste  

SciTech Connect (OSTI)

The radiological hazards of alpha-contaminated wastes are discussed in this overview in terms of two components of hazard: radiobiological hazard, and radioecological hazard. Radiobiological hazard refers to human uptake of alpha-emitters by inhalation and ingestion, and the resultant dose to critical organs of the body. Radioecological hazard refers to the processes of release from buried wastes, transport in the environment, and translocation to man through the food chain. Besides detailing the sources and magnitude of hazards, this brief review identifies the uncertainties in their estimation, and implications for the regulatory process.

Rodgers, J.C.

1982-01-01T23:59:59.000Z

248

Dynamics of pulled desorption with effects of excluded volume interaction: The p-Laplacian diffusion equation and its exact solution  

E-Print Network [OSTI]

We analyze the dynamics of desorption of a polymer molecule which is pulled at one of its ends with force $f$, trying to desorb it. We assume a monomer to desorb when the pulling force on it exceeds a critical value $f_{c}$. We formulate an equation for the average position of the $n^{th}$ monomer, which takes into account excluded volume interaction through the blob-picture of a polymer under external constraints. The approach leads to a diffusion equation with a $p$-Laplacian for the propagation of the stretching along the chain. This has to be solved subject to a moving boundary condition. Interestingly, within this approach, the problem can be solved exactly in the trumpet, stem-flower and stem regimes. In the trumpet regime, we get $\\tau=\\tau_{0}n_d^{2}$ where $n_d$ is the number of monomers that have desorbed at the time $\\tau$. $\\tau_{0}$ is known only numerically, but for $f$ close to $f_{c}$, it is found to be $\\tau_{0}\\sim f_c/(f^{2/3}-f_{c}^{2/3})$. If one used simple Rouse dynamics, this result changes to {\

K. L. Sebastian; V. G. Rostiashvili; T. A. Vilgis

2011-08-31T23:59:59.000Z

249

Direct constraints on diffusion models from cosmic-ray positron data: Excluding the Minimal model for dark matter searches  

E-Print Network [OSTI]

Galactic Cosmic-ray (CR) transport parameters are usually constrained by the boron-to-carbon ratio. This procedure is generically plagued with degeneracies between the diffusion coefficient and the vertical extent of the Galactic magnetic halo. The latter is of paramount importance for indirect dark matter (DM) searches, because it fixes the amount of DM annihilation or decay that contributes to the local antimatter CR flux. These degeneracies could be broken by using secondary radioactive species, but the current data still have large error bars, and this method is extremely sensitive to the very local interstellar medium (ISM) properties. Here, we propose to use the low-energy CR positrons in the GeV range as another direct constraint on diffusion models. We show that the PAMELA data disfavor small diffusion halo ($L\\lesssim 3$ kpc) and large diffusion slope models, and exclude the minimal ({\\em min}) configuration (Maurin et al. 2001, Donato et al. 2004) widely used in the literature to bracket the uncertainties in the DM signal predictions. This is complementary to indirect constraints (diffuse radio and gamma-ray emissions) and has strong impact on DM searches. Indeed this makes the antiproton constraints more robust while enhancing the discovery/exclusion potential of current and future experiments, like AMS-02 and GAPS, especially in the antiproton and antideuteron channels.

Julien Lavalle; David Maurin; Antje Putze

2015-01-22T23:59:59.000Z

250

Mapping High-velocity H-alpha and Lyman-alpha Emission from Supernova 1987A  

E-Print Network [OSTI]

We present new {\\it Hubble Space Telescope} images of high-velocity H-$\\alpha$ and Lyman-$\\alpha$ emission in the outer debris of SN~1987A. The H-$\\alpha$ images are dominated by emission from hydrogen atoms crossing the reverse shock. For the first time we observe emission from the reverse shock surface well above and below the equatorial ring, suggesting a bipolar or conical structure perpendicular to the ring plane. Using the H$\\alpha$ imaging, we measure the mass flux of hydrogen atoms crossing the reverse shock front, in the velocity intervals ($-$7,500~$<$~$V_{obs}$~$<$~$-$2,800 km s$^{-1}$) and (1,000~$<$~$V_{obs}$~$<$~7,500 km s$^{-1}$), $\\dot{M_{H}}$ = 1.2~$\\times$~10$^{-3}$ M$_{\\odot}$ yr$^{-1}$. We also present the first Lyman-$\\alpha$ imaging of the whole remnant and new $Chandra$ X-ray observations. Comparing the spatial distribution of the Lyman-$\\alpha$ and X-ray emission, we observe that the majority of the high-velocity Lyman-$\\alpha$ emission originates interior to the equatorial...

France, Kevin; Fransson, Claes; Larsson, Josefin; Frank, Kari A; Burrows, David N; Challis, Peter; Kirshner, Robert P; Chevalier, Roger A; Garnavich, Peter; Heng, Kevin; Lawrence, Stephen S; Lundqvist, Peter; Smith, Nathan; Sonneborn, George

2015-01-01T23:59:59.000Z

251

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

252

alpha dinucleotide repeat: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Institute 12;www.rpi.edu Alpha Epsilon Lambda Alpha Sigma Chapter Co-terminal Honor Society Rensselaer Polytechnic Institute Chapter President Chaz Goodwine goodwc2@rpi.edu...

253

Alpha phase precipitation from phase-separated beta phase in...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Alpha phase precipitation from phase-separated beta phase in a model Ti-Mo-Al alloy studied by direct coupling of transmission Alpha phase precipitation from phase-separated beta...

254

Antibody-mediated reduction of {alpha}-ketoamides  

DOE Patents [OSTI]

Monoclonal antibodies raised against a 4-nitrophenyl phosphonate hapten catalyze the stereospecific reduction of an {alpha}-ketoamide to the corresponding {alpha}-hydroxyamide in the presence of an appropriate reducing agent.

Schultz, P.G.; Gallop, M.A.

1998-06-09T23:59:59.000Z

255

CRAD, Training - Oak Ridge National Laboratory TRU ALPHA LLWT...  

Broader source: Energy.gov (indexed) [DOE]

Training - Oak Ridge National Laboratory TRU ALPHA LLWT Project CRAD, Training - Oak Ridge National Laboratory TRU ALPHA LLWT Project November 2003 A section of Appendix C to DOE G...

256

Expanding proteome coverage with orthogonal-specificity &alpha...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

We demonstrate the novel application of two proteases for bottom-up proteomics: wild type alpha-lytic protease (WaLP), and an active site mutant of WaLP, M190A alpha-lytic...

257

alpha particle diagnostics: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

kW, 140 GHz gyrotron tubes used with the Joint Egedal, Jan 3 Nuclear Alpha-Particle Condensates Nuclear Experiment (arXiv) Summary: The alpha-particle condensate in nuclei is...

258

alpha particles aberraciones: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Nuclear Alpha-Particle Condensates Nuclear Experiment (arXiv) Summary: The alpha-particle condensate in nuclei is...

259

alpha particle analysis: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Nuclear Alpha-Particle Condensates Nuclear Experiment (arXiv) Summary: The alpha-particle condensate in nuclei is...

260

alpha particles final: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Nuclear Alpha-Particle Condensates Nuclear Experiment (arXiv) Summary: The alpha-particle condensate in nuclei is...

Note: This page contains sample records for the topic "alpha excluding radon" from the National Library of EnergyBeta (NLEBeta).
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to obtain the most current and comprehensive results.


261

alpha particle radioimmunotherapy: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

in tissues (<100 micrometer) (more) Bck, Tom 2011-01-01 2 Nuclear Alpha-Particle Condensates Nuclear Experiment (arXiv) Summary: The alpha-particle condensate in nuclei is...

262

alpha particle diagnostic: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

kW, 140 GHz gyrotron tubes used with the Joint Egedal, Jan 3 Nuclear Alpha-Particle Condensates Nuclear Experiment (arXiv) Summary: The alpha-particle condensate in nuclei is...

263

alpha phase dipalmitoylphosphatidylcholine: Topics by E-print...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Lyman Alpha Radiative Transfer in a Multi-Phase Medium Astrophysics (arXiv) Summary: Hydrogen Ly-alpha is our primary emission-line window into high redshift galaxies....

264

Faculty of Law Number of students who has finished (with a degree) and early leavers (excluding transferred students) by AY (As of May 1, 2012)  

E-Print Network [OSTI]

Holdover H OthersI) Total + early admission Total GraduatesC) over-term within designated term Rate outside school Reasons to leaveF) Leaving RateG) Holdover H within designated term over-term GraduatesCFaculty of Law Number of students who has finished (with a degree) and early leavers (excluding

Banbara, Mutsunori

265

rule'' to reduce the monetary penalty by 50 to 75 percent right off the top. Citizens are often excluded from EPA  

E-Print Network [OSTI]

environmental projects (SEPs), begun in the late 1990s, so that convicted polluters can mitigate the damage excluded from EPA decision making, even when it affects them. For example, in a federal environmental-impact statement, citizens are not given notice of a preliminary environmental assessment of their neighborhood

Peterson, M. Nils

266

Discussion of Alpha Particle Physics Issues for AT Burning Plasmas  

E-Print Network [OSTI]

expected in AT regime (White) For 10% power loss, up to 4 MW alpha power to wall Note: Neutron wall

267

The acoustic spectrum of alpha Cen A  

E-Print Network [OSTI]

This paper presents the analysis of Doppler p-mode observations of the G2V star $\\alpha$ Cen A obtained with the spectrograph CORALIE in May 2001. Thirteen nights of observations have made it possible to collect 1850 radial velocity measurements with a standard deviation of about 1.5 m s$^{-1}$. Twenty-eight oscillation modes have been identified in the power spectrum between 1.8 and 2.9 mHz with amplitudes in the range 12 to 44 cm s$^{-1}$. The average large and small spacing are respectively equal to 105.5 and 5.6 $\\mu$Hz. A comparison with stellar models of $\\alpha$ Cen A is presented.

F. Bouchy; F. Carrier

2002-06-04T23:59:59.000Z

268

Alternate Alpha Induced Reactions for NIF Radiochemistry  

SciTech Connect (OSTI)

Radiochemical analysis of NIF capsule residues has been identified as a potential diagnostic of NIF capsule performance. In particular, alpha-induced nuclear reactions that occur on tracer elements added to the NIF capsule have been shown through simulation to be a very sensitive diagnostic for mix. The short range of the alpha particles makes them representative of the hot spot where they are created through the fusion of deuterium and tritium. Reactions on elements doped into the innermost part of the capsule ablator would therefore be sensitive to material that had mixed into the hot spot. Radiochemical determinations of activated detector elements may perhaps be the only true measure of mix that occurs in a NIF capsule, particularly in cases when the capsule fails.

Shaughnessy, D A; Moody, K J; Bernstein, L A

2010-02-26T23:59:59.000Z

269

$\\alpha$ Centauri A in the far infrared  

E-Print Network [OSTI]

Chromospheres and coronae are common phenomena on solar-type stars. Understanding the energy transfer to these heated atmospheric layers requires direct access to the relevant empirical data. Study of these structures has, by and large, been limited to the Sun thus far. The region of the temperature reversal can be directly observed only in the far infrared and submm. We aim at the determination of the characteristics of the atmosphere in the region of the temperature minimum of the solar sister star alpha Cen A. For the nearby binary system alpha Centauri, stellar parameters are known with high accuracy from measurements. For the basic model parameters Teff, log g and [Fe/H], we interpolate in the grid of GAIA/PHOENIX stellar model atmospheres and compute the corresponding model for the G2 V star alpha Cen A. Comparison with photometric measurements shows excellent agreement between observed photospheric data in the optical and infrared. For longer wavelengths, the modelled spectral energy distribution is co...

Liseau, R; Olofsson, G; Bryden, G; Marshall, J P; Ardila, D; Aran, A Bayo; Danchi, W C; del Burgo, C; Eiroa, C; Ertel, S; Fridlund, M C W; Krivov, A V; Pilbratt, G L; Roberge, A; Thbault, P; Wiegert, J; White, G J

2012-01-01T23:59:59.000Z

270

Lyman-alpha Absorption from Heliosheath Neutrals  

E-Print Network [OSTI]

We assess what information HST observations of stellar Ly-alpha lines can provide on the heliosheath, the region of the heliosphere between the termination shock and heliopause. To search for evidence of heliosheath absorption, we conduct a systematic inspection of stellar Ly-alpha lines reconstructed after correcting for ISM absorption (and heliospheric/astrospheric absorption, if present). Most of the stellar lines are well centered on the stellar radial velocity, as expected, but the three lines of sight with the most downwind orientations relative to the ISM flow (Chi1 Ori, HD 28205, and HD 28568) have significantly blueshifted Ly-alpha lines. Since it is in downwind directions where heliosheath absorption should be strongest, the blueshifts are almost certainly caused by previously undetected heliosheath absorption. We make an initial comparison between the heliosheath absorption and the predictions of a pair of heliospheric models. A model with a complex multi-component treatment of plasma within the heliosphere predicts less absorption than a model with a simple single-fluid treatment, which leads to better agreement with the data. Finally, we find that nonplanetary energetic neutral atom (ENA) fluxes measured by the ASPERA-3 instrument on board Mars Express, which have been interpreted as being from the heliosheath, are probably too high to be consistent with the relative lack of heliosheath absorption seen by HST. This would argue for a local interplanetary source for these ENAs instead of a heliosheath source.

Brian E. Wood; Vladislav V. Izmodenov; Jeffrey L. Linsky; Yury G. Malama

2006-11-30T23:59:59.000Z

271

Detection of alpha radiation in a beta radiation field  

DOE Patents [OSTI]

An apparatus and method for detecting alpha particles in the presence of high activities of beta particles utilizing an alpha spectrometer. The apparatus of the present invention utilizes a magnetic field applied around the sample in an alpha spectrometer to deflect the beta particles from the sample prior to reaching the detector, thus permitting detection of low concentrations of alpha particles. In the method of the invention, the strength of magnetic field required to adequately deflect the beta particles and permit alpha particle detection is given by an algorithm that controls the field strength as a function of sample beta energy and the distance of the sample to the detector.

Mohagheghi, Amir H. (Albuquerque, NM); Reese, Robert P. (Edgewood, NM)

2001-01-01T23:59:59.000Z

272

Complex-Energy Shell-Model Description of Alpha Decay  

SciTech Connect (OSTI)

In his pioneering work of alpha decay, Gamow assumed that the alpha particle formed inside the nucleus tunnels through the barrier of the alpha-daughter potential. The corresponding metastable state can be viewed as a complex-energy solution of the time-independent Schroedinger equation with the outgoing boundary condition. The formation of the alpha cluster, missing in the original Gamow formulation, can be described within the R-matrix theory in terms of the formation amplitude. In this work, the alpha decay process is described by computing the formation amplitude and barrier penetrability in a large complex-energy configuration space spanned by the complex-energy eigenstates of the finite Woods-Saxon (WS) potential. The proper normalization of the decay channel is essential as it strongly modifies the alpha-decay spectroscopic factor. The test calculations are carried out for the ^{212}Po alpha decay.

Id Betan, R. [Rosario Physics Institute, Rosario, Argentina] [Rosario Physics Institute, Rosario, Argentina; Nazarewicz, Witold [ORNL] [ORNL

2011-01-01T23:59:59.000Z

273

Extreme alpha-clustering in the 18O nucleus  

E-Print Network [OSTI]

The structure of the 18O nucleus at excitation energies above the alpha decay threshold was studied using 14C+alpha resonance elastic scattering. A number of states with large alpha reduced widths have been observed, indicating that the alpha-cluster degree of freedom plays an important role in this N not equal Z nucleus. However, the alpha-cluster structure of this nucleus is very different from the relatively simple pattern of strong alpha-cluster quasi-rotational bands in the neighboring 16O and 20Ne nuclei. A 0+ state with an alpha reduced width exceeding the single particle limit was identified at an excitation energy of 9.9+/-0.3 MeV. We discuss evidence that states of this kind are common in light nuclei and give possible explanations of this feature.

E. D. Johnson; G. V. Rogachev; V. Z. Goldberg; S. Brown; D. Robson; A. M. Crisp; P. D. Cottle; C. Fu; J. Giles; B. W. Green; K. W. Kemper; K. Lee; B. T. Roeder; R. E. Tribble

2009-06-19T23:59:59.000Z

274

Determination of $\\alpha_{s}$ using Jet Rates at LEP with the OPAL detector  

E-Print Network [OSTI]

Hadronic events produced in e+e- collisions by the LEP collider and recorded by the OPAL detector were used to form distributions based on the number of reconstructed jets. The data were collected between 1995 and 2000 and correspond to energies of 91 GeV, 130-136 GeV and 161-209 GeV. The jet rates were determined using four different jet-finding algorithms (Cone, JADE, Durham and Cambridge). The differential two-jet rate and the average jet rate with the Durham and Cambridge algorithms were used to measure alpha(s) in the LEP energy range by fitting an expression in which order alpah_2s calculations were matched to a NLLA prediction and fitted to the data. Combining the measurements at different centre-of-mass energies, the value of alpha_s (Mz) was determined to be alpha(s)(Mz)=0.1177+-0.0006(stat.)+-0.0012$(expt.)+-0.0010(had.)+-0.0032

Abbiendi, G; kesson, P F; Alexander, G; Anagnostou, G; Anderson, K J; Asai, S; Axen, D; Bailey, I; Barberio, E; Barillari, T; Barlow, R J; Batley, J Richard; Bechtle, P; Behnke, T; Bell, K W; Bell, P J; Bella, G; Bellerive, A; Benelli, G; Bethke, Siegfried; Biebel, O; Boeriu, O; Bock, P; Boutemeur, M; Braibant, S; Brown, R M; Burckhart, H J; Campana, S; Capiluppi, P; Carnegie, R K; Carter, A A; Carter, J R; Chang, C Y; Charlton, D G; Ciocca, C; Csilling, A; Cuffiani, M; Dado, S; de Roeck, A; De Wolf, E A; Desch, Klaus; Dienes, B; Donkers, M; Dubbert, J; Duchovni, E; Duckeck, G; Duerdoth, I P; Etzion, E; Fabbri, F L; Ferrari, P; Fiedler, F; Fleck, I; Ford, M; Frey, A; Gagnon, P; Gary, J W; Geich-Gimbel, C; Giacomelli, G; Giacomelli, P; Giunta, M; Goldberg, J; Gross, E; Grunhaus, Jacob; Gruw, M; Gnther, P O; Sen-Gupta, A; Hajdu, C; Hamann, M; Hanson, G G; Harel, A; Hauschild, M; Hawkes, C M; Hawkings, R; Hemingway, R J; Herten, G; Heuer, R D; Hill, J C; Horvth, D; Igo-Kemenes, P; Ishii, K; Jeremie, H; Jovanovic, P; Junk, T R; Kanzaki, J; Karlen, D; Kawagoe, K; Kawamoto, T; Keeler, R K; Kellogg, R G; Kennedy, B W; Kluth, S; Kobayashi, T; Kobel, M; Komamiya, S; Kramer, T; Krasznahorkay, A; Krieger, P; Von Krogh, J; Khl, T; Kupper, M; Lafferty, G D; Landsman, H; Lanske, D; Lellouch, D; Letts, J; Levinson, L; Lillich, J; Lloyd, S L; Loebinger, F K; L, J; Ludwig, A; Ludwig, J; Mader, W; Marcellini, S; Martin, A J; Mashimo, T; Mttig, P; McKenna, J A; McPherson, R A; Meijers, F; Menges, W; Merritt, F S; Mes, H; Meyer, N; Michelini, A; Mihara, S; Mikenberg, G; Miller, D J; Mohr, W; Mori, T; Mutter, A; Nagai, K; Nakamura, I; Nanjo, H; Neal, H A; Nisius, R; O'Neale, S W; Oh, A; Oreglia, M J; Orito, S; Pahl, C; Psztor, G; Pater, J R; Pilcher, J E; Pinfold, J L; Plane, D E; Pooth, O; Przybycien, M B; Quadt, A; Rabbertz, K; Rembser, C; Renkel, P; Roney, J M; Rossi, A M; Rozen, Y; Runge, K; Sachs, K; Saeki, T; Sarkisyan-Grinbaum, E; Schaile, A D; Schaile, O; Scharff-Hansen, P; Schieck, J; Schrner-Sadenius, T; Schrder, M; Schumacher, M; Seuster, R; Shears, T G; Shen, B C; Sherwood, P; Skuja, A; Smith, A M; Sobie, R J; Sldner-Rembold, S; Span, F; Stahl, A; Strom, D; Strhmer, R; Tarem, S; Tasevsky, M; Teuscher, R; Thomson, M A; Torrence, E; Toya, D; Tran, P; Trigger, I; Trcsnyi, Z L; Tsur, E; Turner-Watson, M F; Ueda, I; Ujvri, B; Vollmer, C F; Vannerem, P; Vertesi, R; Verzocchi, M; Voss, H; Vossebeld, Joost Herman; Ward, C P; Ward, D R; Watkins, P M; Watson, A T; Watson, N K; Wells, P S; Wengler, T; Wermes, N; Wilson, G W; Wilson, J A; Wolf, G; Wyatt, T R; Yamashita, S; Zer-Zion, D; Zivkovic, L

2006-01-01T23:59:59.000Z

275

Faculty of Law Number of students who has finished (with a degree) and early leavers (excluding transferred students) by AY (As of May 1, 2011)  

E-Print Network [OSTI]

Faculty of Law Number of students who has finished (with a degree) and early leavers (excluding or less more than 1 year Law 180 227 227 155 65 220 68% 29% 97% 5 2% 0 2 Total 180 227 227 155 65 220 68% 29% 97% 5 2% 0 2 Law 180 184 184 139 37 176 76% 20% 96% 6 3% 2 0 Total 180 184 184 139 37 176 76% 20

Banbara, Mutsunori

276

Meta-analysis of the Alpha/Beta Ratio for Prostate Cancer in the Presence of an Overall Time Factor: Bad News, Good News, or No News?  

SciTech Connect (OSTI)

Purpose: To present a novel method for meta-analysis of the fractionation sensitivity of tumors as applied to prostate cancer in the presence of an overall time factor. Methods and Materials: A systematic search for radiation dose-fractionation trials in prostate cancer was performed using PubMed and by manual search. Published trials comparing standard fractionated external beam radiation therapy with alternative fractionation were eligible. For each trial the {alpha}/{beta} ratio and its 95% confidence interval (CI) were extracted, and the data were synthesized with each study weighted by the inverse variance. An overall time factor was included in the analysis, and its influence on {alpha}/{beta} was investigated. Results: Five studies involving 1965 patients were included in the meta-analysis of {alpha}/{beta}. The synthesized {alpha}/{beta} assuming no effect of overall treatment time was -0.07 Gy (95% CI -0.73-0.59), which was increased to 0.47 Gy (95% CI -0.55-1.50) if a single highly weighted study was excluded. In a separate analysis, 2 studies based on 10,808 patients in total allowed extraction of a synthesized estimate of a time factor of 0.31 Gy/d (95% CI 0.20-0.42). The time factor increased the {alpha}/{beta} estimate to 0.58 Gy (95% CI -0.53-1.69)/1.93 Gy (95% CI -0.27-4.14) with/without the heavily weighted study. An analysis of the uncertainty of the {alpha}/{beta} estimate showed a loss of information when the hypofractionated arm was underdosed compared with the normo-fractionated arm. Conclusions: The current external beam fractionation studies are consistent with a very low {alpha}/{beta} ratio for prostate cancer, although the CIs include {alpha}/{beta} ratios up to 4.14 Gy in the presence of a time factor. Details of the dose fractionation in the 2 trial arms have critical influence on the information that can be extracted from a study. Studies with unfortunate designs will supply little or no information about {alpha}/{beta} regardless of the number of subjects enrolled.

Vogelius, Ivan R., E-mail: vogelius@gmail.com [Department of Radiation Oncology, Rigshospitalet, University of Copenhagen (Denmark); Bentzen, Soren M. [Department of Human Oncology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin (United States)] [Department of Human Oncology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin (United States)

2013-01-01T23:59:59.000Z

277

Alpha decay chains from element 113  

E-Print Network [OSTI]

Theoretical estimates of $\\alpha$-decay half lives of several nuclei in the decay from element 113 are presented. Calculations in a WKB framework using DDM3Y interaction and experimental Q-values are in good agreement with the experimental data. Half life calculations are found to be quite sensitive to the Q-values and angular momenta transfers. Calculated decay lifetime decreases, owing to more penetrability as well as thinner barrier, as Q-value increases. Deviations to this predominant behaviour observed in some recent experimental data may be attributed to non zero spin-parities in some cases.

P. Roy Chowdhury; D. N. Basu; C. Samanta

2007-04-30T23:59:59.000Z

278

Electron shell and the alpha-decay  

E-Print Network [OSTI]

The ratio of the alpha-decay widths of a bare nucleus and the related atom is calculated. Both the change of the form and thus the penetrability of the potential barrier and the effect of reflection in the classically-allowed region appearing due to the electron shell are taken into account in the calculations of this ratio. The contribution of each of these two effects is of one and the same order of magnitude. For long-lived radioactive samples the values of the total effect turn out to be somewhat below 1 percent.

Sergey Yu. Igashov; Yury M. Tchuvil'sky

2012-12-03T23:59:59.000Z

279

Run Spear Down Low-alpha Shutdown  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0 Resource ProgramEnergyMaterials:Bill WilcoxSpear Down Low-alpha

280

Environmental factors affecting long-term stabilization of radon suppression covers for uranium mill tailings  

SciTech Connect (OSTI)

Pacific Northwest Laboratory is investigating the use of a rock armoring blanket (riprap) to mitigate wind and water erosion of an earthen radon suppression cover applied to uranium mill tailings. To help determine design stresses for the tailings piles, environmental parameters are characterized for the five active uranium-producing regions on a site-specific basis. Only conventional uranium mills that are currently operating or that are scheduled to open in the mid 1980s are considered. Available data indicate that flooding has the most potential for disrupting a tailings pile. The arid regions of the Wyoming Basins and the Colorado Plateau are subject to brief storms of high intensity. The Texas Gulf Coast has the highest potential for extreme precipitation from hurricane-related storms. Wind data indicate average wind speeds from 3 to 6 m/sec for the sites, but extremes of 40 m/sec can be expected. Tornado risks range from low to moderate. The Colorado Plateau has the highest seismic potential, with maximum acceleration caused by earthquakes ranging from 0.2 to 0.4 g. Any direct effect from volcanic eruption is negligible, as all mills are located 90 km or more from an igneous or hydrothermal system.

Young, J.K.; Long, L.W.; Reis, J.W.

1982-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "alpha excluding radon" 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

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

282

A Precise Determination of $\\alpha_s$ from the C-parameter Distribution  

E-Print Network [OSTI]

We present a global fit for $\\alpha_s(m_Z)$, analyzing the available C-parameter data measured at center-of-mass energies between $Q=35$ and $207$ GeV. The experimental data is compared to a N$^3$LL$^\\prime$ + $\\mathcal{O}(\\alpha_s^3)$ + $\\Omega_1$ theoretical prediction (up to the missing 4-loop cusp anomalous dimension), which includes power corrections coming from a field theoretical nonperturbative soft function. The dominant hadronic parameter is its first moment $\\Omega_1$, which is defined in a scheme which eliminates the $\\mathcal{O}(\\Lambda_{\\rm QCD})$ renormalon ambiguity. The resummation region plays a dominant role in the C-parameter spectrum, and in this region a fit for $\\alpha_s(m_Z)$ and $\\Omega_1$ is sufficient. We find $\\alpha_s(m_Z)=0.1123\\pm 0.0015$ and $\\Omega_1=0.421\\pm 0.063\\,{\\rm GeV}$ with $\\chi^2/\\rm{dof}=0.988$ for $404$ bins of data. These results agree with the prediction of universality for $\\Omega_1$ between thrust and C-parameter within 1-$\\sigma$.

Hoang, Andr H; Mateu, Vicent; Stewart, Iain W

2015-01-01T23:59:59.000Z

283

H$\\alpha$ and EUV observations of a partial CME  

E-Print Network [OSTI]

We have obtained H$\\alpha$ high spatial and time resolution observations of the upper solar chromosphere and supplemented these with multi-wavelength observations from the Solar Dynamic Observatory (SDO) and the {\\it Hinode} ExtremeUltraviolet Imaging Spectrometer (EIS). The H$\\alpha$ observations were conducted on 11 February 2012 with the Hydrogen-Alpha Rapid Dynamics Camera (HARDcam) instrument at the National Solar Observatory's Dunn Solar Telescope. Our H$\\alpha$ observations found large downflows of chromospheric material returning from coronal heights following a failed prominence eruption. We have detected several large condensations ("blobs") returning to the solar surface at velocities of $\\approx$200 km s$^{-1}$ in both H$\\alpha$ and several SDO AIA band passes. The average derived size of these "blobs" in H$\\alpha$ is 500 by 3000 km$^2$ in the directions perpendicular and parallel to the direction of travel, respectively. A comparison of our "blob" widths to those found from coronal rain, indicate...

Christian, Damian J; Antolin, Patrick; Mathioudakis, Mihalis

2015-01-01T23:59:59.000Z

284

Work to save dose: contrasting effective dose rates from radon exposure in workplaces and residences against the backdrop of public and occupational limits  

SciTech Connect (OSTI)

Office workers are exposed to radon while at work and at home. Though there has been a multitude of studies reporting the measurements of radon concentrations and potential lung and effective doses associated with radon and progeny exposure in homes, similar studies on the concentrations and subsequent effective dose rates in the non-mine workplaces are lacking. Additionally, there are few, if any, comparative analyses of radon exposures at more 'typical' workplace with residential exposures within the same county. The purposes of this study were to measure radon concentrations in office and residential spaces in the same county and explore the radiation dose implications. Sixty-five track-etch detectors were deployed in office spaces and 47 were deployed in residences, all within Los Alamos County, New Mexico, USA. The sampling periods for these measurements were generally about three months. The measured concentrations were used to calculate and compare effective dose rates resulting from exposure while at work and at home. Results showed that full-time office workers receive on average about 8 times greater exposure at home than while in the office (2.3 mSv yr-! versus 0.3 mSv yr-!). The estimated effective dose rate for a more homebound person was about 3 mSv yr-!. Estimating effective doses from background radon exposure in the same county as Los Alamos National Laboratory, with thousands of'radiological workers,' highlights interesting contrasts in radiation protection standards that span public and occupational settings. For example, the effective dose rate from background radon exposure in unregulated office spaces ranged up to 1.1 mSv yr-!, which is similar to the 1 mSv yr-! threshold for regulation ofa 'radiological worker,' as defined in the Department of Energy regulations for occupational exposure. Additionally, the estimated average effective dose total of> 3 mSv yf! from radon background exposure in homes stands in contrast to the 0.1 mSv yr-! air pathway effective public dose limit regulated by the Environmental Protection Agency for radioactive air emissions.

Whicker, Jeffrey J [Los Alamos National Laboratory; Mcnaughton, Michael W [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

285

Alpha-particle optical potential proofs at astrophysically relevant energies  

E-Print Network [OSTI]

$(\\alpha,\\gamma)$ and $(\\alpha$,n) reaction cross sections recently measured close to the reaction thresholds are rather well described by a previously developed regional optical potential. Thus, particular features of the $\\alpha$-particle optical potential at energies below the Coulomb barrier, besides parameters describing $\\alpha$-particle elastic scattering at higher energies are confirmed. Additional limitations of similar statistical model calculations for minor reaction channels are shown to be most likely due to an overlooked process or critical values of statistical model parameters around closed nuclear shells.

M. Avrigeanu; V. Avrigeanu

2008-11-01T23:59:59.000Z

286

Penguin pollution estimates relevant for phi_2/alpha extraction  

E-Print Network [OSTI]

A review of methods to extract the standard CKM unitarity triangle angle alpha is provided. The sizes of related theoretical errors are reviewed.

Jure Zupan

2007-08-16T23:59:59.000Z

287

alpha receptor interactions: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

derived from the Wigner transform of the nonlocal Lambda alpha kernel shows a strong energy dependence for the incident Lambda-particle, indicating the importance of the...

288

alpha 1-adrenergic receptor: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

implicated in lipid homeostasis-Activated Receptor alpha (PPAR ) is a key regulator of energy homeostasis ( ) and 1 -5 the anti-inflammatory response homeostasis, through its9...

289

acid receptor alpha: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

implicated in lipid homeostasis-Activated Receptor alpha (PPAR ) is a key regulator of energy homeostasis ( ) and 1 -5 the anti-inflammatory response homeostasis, through its9...

290

alpha spectrometry contribution: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Carlo code, known as AASI, is developed for simulating energy spectra in alpha spectrometry. The code documented here is a comprehensive package where all the major processes...

291

alpha 1-adrenoceptor antagonist: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

present review provides an update on alphas measurements from the past year. W. J. Stirling 1997-09-23 5 Antagonistic competition moderates virulence in Bacillus thuringiensis...

292

alpha rays: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

observation of GRB 991216, may provide important constraints on the immediate environment of the burst and hence on progenitor models. The large Fe K-alpha equivalent widths...

293

Lyman Alpha Absorption in The Cosmic Web  

E-Print Network [OSTI]

We describe large scale structure at high redshift in terms of the Cosmic Web picture for {S,Lambda,O,H}CDM models: how galactic-scale ``peak-patches'', filaments and membranes create an interconnected intergalactic medium. The ideas are applied to our Ly$\\alpha$ forest simulations of ``shear-field patches''. We discuss simulation method and design, resolution dependence, the statistical combination of patches, UV flux scaling, and whether filtered Zel'dovich maps are useful. The response to changes in power spectrum shape and amplitude, and in cosmological parameters, is described. We also show Omega_b h^2 derived from UV rescaling is overestimated if the resolution is not adequate.

J. Richard Bond; James W. Wadsley

1997-10-10T23:59:59.000Z

294

Triply Differential Jet Cross Sections for Hadron Collisions at Order alpha_s^3 in QCD  

E-Print Network [OSTI]

We discuss cross sections for hadron + hadron to 2 jets + anything in which three jet variables are measured. Such cross sections are useful especially for determining parton distributions. We define a new cross section d sigma/dX_A dX_B d eta_* for which the perturbation theory is nicely behaved even in the kinematic regime where the parton distributions are probed at large momentum fractions. The cross section d\\sigma/dE_{T1}\\, d\\eta_1\\, d\\eta_2, which has been used in the past, is not so well behaved in this region. We calculate these cross sections at order $\\alpha_s^3$ in QCD.

Stephen D. Ellis; Davison E. Soper

1994-12-22T23:59:59.000Z

295

Jet Production in ep Collisions at Low Q^2 and Determination of $\\alpha_{s}$  

E-Print Network [OSTI]

The production of jets is studied in deep-inelastic e+p scattering at low negative four momentum transfer squared 5alpha_s.

Aaron, FD; Alexa, C; Andreev, V; Antunovic, B; 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; 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; Delcourt, B; Delvax, J; 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, Samvel; 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, X; Jonsson, L; Jung, A W; Jung, H; Kapichine, M; Katzy, J; Kenyon, I R; Kiesling, C; Klein, M; Kleinwort, C; Kluge, T; Knutsson, A; Kogler, R; Kosior, E; 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; Lendermann, V; Levonian, S; Li, G; Lipka, K; Liptaj, A; List, B; List, J; Loktionova, N; Lopez-Fernandez, R; Lubimov, V; 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; Mikocki, S; Milcewicz-Mika, I; Moreau, F; Morozov, A; Morris, J V; Mozer, M U; Mudrinic, M; Muller, K; Murin, P; Naumann, Th; Newman, P R; Niebuhr, C; Nikiforov, A; Nikitin, D; Nowak, G; Nowak, K; 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; 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; Tabasco, J E Ruiz; Rusakov, S; Salek, D; Sankey, D P C; Sauter, M; Sauvan, E; Schmitt, S; 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, A; 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; Trevino, A Vargas; 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

2010-01-01T23:59:59.000Z

296

Optical appearance of alpha particle tracks in CR-39 SSNTD K.N. Yu *, H.H.W. Lee, A.W.T. Wong, Y.L. Law, S.F.L. Cheung, D. Nikezic, F.M.F. Ng  

E-Print Network [OSTI]

use- ful in, for example, the studies of airborne radon progeny [1]. One promising approach is to make

Yu, K.N.

297

Measurements of the angle alpha (phi2) at B factories  

E-Print Network [OSTI]

The measurements of the angle alpha (phi2) of the unitarity triangle at the B factories are reviewed. The value of alpha determined by combining the results obtained in the B to pi pi, B to rho pi, and B to rho rho modes by both the BABAR and Belle experiments is (87.5 +6.2 -5.3) degrees.

G. Vasseur

2008-10-02T23:59:59.000Z

298

Metathesis process for preparing an alpha, omega-functionalized olefin  

DOE Patents [OSTI]

A cross-metathesis process for preparing an .alpha.,.omega.-functionalized olefin, such as methyl 9-decenoate, and an .alpha.-olefin having three or more carbon atoms, such as 1-decene. The process involves contacting in a first reaction zone an .alpha.-functionalized internal olefin, such as methyl oleate, and an .alpha.-olefinic monomer having three or more carbon atoms, such as 1-decene, with a first metathesis catalyst to prepare an effluent stream containing the .alpha.,.omega.-functionalized olefin, such as methyl 9-decenoate, an unfunctionalized internal olefin, such as 9-octadecene, unconverted reactant olefins, and optionally, an .alpha.,.omega.-difunctionalized internal olefinic dimer, such as dimethyl 9-octadecen-1,18-dioate; separating said effluent streams; then contacting in a second reaction zone the unfunctionalized internal olefin with ethylene in the presence of a second metathesis catalyst to obtain a second product effluent containing the .alpha.-olefinic monomer having three or more carbon atoms; and cycling a portion of the .alpha.-olefinic monomer stream(s) to the first zone.

Burdett, Kenneth A. (Midland, MI); Mokhtarzadeh, Morteza (Charleston, WV); Timmers, Francis J. (Midland, MI)

2010-10-12T23:59:59.000Z

299

alpha 7l test: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

alpha 7l test First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Remote associates test and alpha brain...

300

New Advances in Alpha-Beta Searching Jonathan Schaeffer  

E-Print Network [OSTI]

New Advances in Alpha-Beta Searching Jonathan Schaeffer Dept. of Computing Science Alpha-Beta has been the algorithm of choice for game-tree search for over three decades. Its suc- cess the search efficiency. Although state-of- the-art game-playing programs build trees that are close in size

Dumas, Jean-Guillaume

Note: This page contains sample records for the topic "alpha excluding radon" 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

Elastic alpha scattering experiments and the alpha-nucleus optical potential at low energies  

E-Print Network [OSTI]

High precision angular distribution data of ($\\alpha$,$\\alpha$) elastic scattering are presented for the nuclei $^{89}$Y, $^{92}$Mo, $^{106,110,116}$Cd, $^{112,124}$Sn, and $^{144}$Sm at energies around the Coulomb barrier. Such data with small experimental uncertainties over the full angular range (20-170 degrees) are the indispensable prerequisite for the extraction of local optical potentials and for the determination of the total reaction cross section $\\sigma_{\\rm{reac}}$. A systematic fitting procedure was applied to the presented experimental scattering data to obtain comprehensive local potential parameter sets which are composed of a real folding potential and an imaginary potential of Woods-Saxon surface type. The obtained potential parameters were used in turn to construct a new systematic $\\alpha$-nucleus potential with very few parameters. Although this new potential cannot reproduce the angular distributions with the same small deviations as the local potential, the new potential is able to predict the total reaction cross sections for all cases under study.

P. Mohr; G. G. Kiss; Zs. Flp; D. Galaviz; Gy. Gyrky; E. Somorjai

2012-12-12T23:59:59.000Z

302

A simple procedure to prepare spherical {alpha}-alumina powders  

SciTech Connect (OSTI)

Spherical {alpha}-alumina powders were prepared by the controlled hydrolysis of aluminum isopropoxide in a hydrolysis system consisting of octanol and acetonitrile. Diverse solvents to dissolve reactant formed diverse hydrolysis systems and affected particle shape of {alpha}-alumina powders. The precursors crystallized to {gamma}-alumina at 1000 deg. C and converted to {alpha}-alumina at 1150 deg. C without intermediate phases. The particle morphology of precursor was retained after it crystallized to {alpha}-alumina. The heating rate influenced the particle shape and the state of agglomeration during calcination process. The thermal properties of the precursors were characterized by thermal gravimetric and differential thermal analysis. X-ray diffraction technique was used to confirm the conversion of crystalline phase of alumina powders from amorphous to {alpha}-phase. Transmission electron microscopy was used to investigate the morphologies and size of the precursors and products.

Liu Hongyu [State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012 (China); Ning Guiling [State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012 (China)], E-mail: ninggl@dlut.edu.cn; Gan Zhihong; Lin Yuan [State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012 (China)

2009-04-02T23:59:59.000Z

303

The alpha-cluster model applied to {sup 96}Ru  

SciTech Connect (OSTI)

The states of {sup 96}Ru are investigated in terms of the a alpha+ core structure. The ground state band of the alpha+{sup 92}Mo system is obtained through a local cluster-core potential which includes a fixed set of parameters employed in other mass regions. The calculated spectrum gives a good general description of the experimental {sup 96}Ru levels. The reduced alpha-widths, B(E2) transition rates and rms intercluster separations are determined for the members of the ground state band. The results show that the model can reproduce the order of magnitude of the experimental B(E2) values without the use of effective charges and indicate that the first members of the ground state band present a stronger alpha-cluster character. Predictions concerning a negative parity band of the alpha+{sup 92}Mo system are also shown.

Souza, M. A.; Miyake, H. [Institute of Physics, Universidade de Sao Paulo, Sao Paulo-SP (Brazil)

2010-05-21T23:59:59.000Z

304

Computer program for the sensitivity calculation of a CR-39 detector in a diffusion chamber for radon measurements  

SciTech Connect (OSTI)

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

305

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

306

Thalamocortical Mechanisms for the Anteriorization of Alpha Rhythms during Propofol-Induced Unconsciousness  

E-Print Network [OSTI]

As humans are induced into a state of general anesthesia via propofol, the normal alpha rhythm (813 Hz) in the occipital cortex disappears and a frontal alpha rhythm emerges. This spatial shift in alpha activity is called ...

Vijayan, Sujith

307

alpha tnfa-induced pre-b: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

present review provides an update on alphas measurements from the past year. W. J. Stirling 1997-09-23 5 ALPHA OMEGA ALPHA National Honor Medical Society Biology and Medicine...

308

alpha 2u-globulin hyaline: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

present review provides an update on alphas measurements from the past year. W. J. Stirling 1997-09-23 3 ALPHA OMEGA ALPHA National Honor Medical Society Biology and Medicine...

309

Antihydrogen Trapped in the ALPHA Experiment  

ScienceCinema (OSTI)

In 2010 the ALPHA collaboration succeeded in trapping antihydrogen atoms for the first time.[i] Stored antihydrogen promises to be a unique tool for making high precision measurements of the structure of this first anti-atom. Achieving this milestone presented several substantial experimental challenges and this talk will describe how they were overcome. The unique design features of the ALPHA apparatus will be explained.[ii] These allow a high intensity positron source and an antiproton imaging detector similar to the one used in the ATHENA[iii] experiment to be combined with an innovative magnet design of the anti-atom trap. This seeks to minimise the perturbations to trapped charged particles which may cause particle loss and heating[iv]. The diagnostic techniques used to measure the diameter, number, density, and temperatures of both plasmas will be presented as will the methods developed to actively compress and cool of both plasma species to sizes and temperatures [v],[vi], [vii] where trapping attempts with a reasonable chance of success can be tried. The results of the successful trapping experiments will be outlined as well as some subsequent experiments to improve the trapping rate and storage time. [i] 'Trapped antihydrogen' G.B. Andresen et al., Nature 468, 673 (2010) [ii]'A Magnetic Trap for Antihydrogen Confinement' W. Bertsche et al., Nucl. Instr. Meth. Phys. Res. A566, 746 (2006) [iii] Production and detection of cold antihydrogen atoms M.Amoretti et al., Nature 419, 456 (2002). [iv]' Antihydrogen formation dynamics in a multipolar neutral anti-atom trap' G.B. Andresen et al., Phys. Lett. B 685, 141 (2010) [v]' Evaporative Cooling of Antiprotons to Cryogenic Temperatures', G.B. Andresen et al. Phys. Rev. Lett 105, 013003 (2010) [vi]'Compression of Antiproton Clouds for Antihydrogen Trapping' G. B. Andresen et al. Phys. Rev. Lett 100, 203401 (2008) [vii] 'Autoresonant Excitation of Antiproton Plasmas' G.B. Andresen et al., Phys. Rev. Lett. 106, 025002 (2011) Organizer: Ferdinand Hahn PH/DT Detector Seminar webpage

None

2011-04-25T23:59:59.000Z

310

IGFBP-3, hypoxia and TNF-{alpha} inhibit adiponectin transcription  

SciTech Connect (OSTI)

The thiazolidinedione rosiglitazone, an agonist ligand for the nuclear receptor PPAR-{gamma}, improves insulin sensitivity in part by stimulating transcription of the insulin-sensitizing adipokine adiponectin. It activates PPAR-{gamma}-RXR-{alpha} heterodimers bound to PPAR-{gamma} response elements in the adiponectin promoter. Rosiglitazone-stimulated adiponectin protein synthesis in 3T3-L1 mouse adipocytes has been shown to be inhibited by IGFBP-3, which can be induced by hypoxia and the proinflammatory cytokine, TNF-{alpha}, two inhibitors of adiponectin transcription. The present study demonstrates that IGFBP-3, the hypoxia-mimetic agent cobalt chloride, and TNF-{alpha} inhibit rosiglitazone-induced adiponectin transcription in mouse embryo fibroblasts that stably express PPAR-{gamma}2. Native IGFBP-3 can bind RXR-{alpha} and inhibited rosiglitazone stimulated promoter activity, whereas an IGFBP-3 mutant that does not bind RXR-{alpha} did not. These results suggest that IGFBP-3 may mediate the inhibition of adiponectin transcription by hypoxia and TNF-{alpha}, and that IGFBP-3 binding to RXR-{alpha} may be required for the observed inhibition.

Zappala, Giovanna, E-mail: zappalag@mail.nih.gov [Diabetes Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD (United States)] [Diabetes Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD (United States); Rechler, Matthew M. [Diabetes Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD (United States) [Diabetes Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD (United States); Clinical Endocrinology Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD (United States)

2009-05-15T23:59:59.000Z

311

H{alpha} ABSORPTION IN TRANSITING EXOPLANET ATMOSPHERES  

SciTech Connect (OSTI)

Absorption of stellar H{alpha} by the upper atmosphere of the planet HD 189733b has recently been detected by Jensen et al. Motivated by this observation, we have developed a model for atomic hydrogen in the n = 2 state and compared the resulting H{alpha} line profile to the observations. The model atmosphere is in hydrostatic balance, as well as thermal and photoionization equilibrium. Collisional and radiative transitions are included in the determination of the n = 2 state level population. We find that H{alpha} absorption is dominated by an optical depth {tau} {approx} 1 shell, composed of hydrogen in the metastable 2s state that is located below the hydrogen ionization layer. The number density of the 2s state within the shell is found to vary slowly with radius, while that of the 1s state falls rapidly. Thus while the Ly{alpha} absorption, for a certain wavelength, occurs inside a relatively well defined impact parameter, the contribution to H{alpha} absorption is roughly uniform over the entire atomic hydrogen layer. The model can approximately reproduce the observed Ly{alpha} and H{alpha} integrated transit depths for HD 189733b by using an ionization rate enhanced over that expected for the star by an order of magnitude. For HD 209458b, we are unable to explain the asymmetric H{alpha} line profile observed by Jensen et al., as the model produces a symmetric line profile with transit depth comparable to that of HD 189733b. In an appendix, we study the effect of the stellar Ly{alpha} absorption on the net cooling rate.

Christie, Duncan; Arras, Phil; Li Zhiyun, E-mail: dac5zm@virginia.edu, E-mail: pla7y@virginia.edu, E-mail: zl4h@virginia.edu [Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904-4325 (United States)

2013-08-01T23:59:59.000Z

312

E-Print Network 3.0 - alpha spectroscopy Sample Search Results  

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for Physics... semiempirical relationship is derived on the grounds of the fission theory of alpha decay. It takes... , the number of known alpha emitters has been...

313

E-Print Network 3.0 - alpha-decaying 9- isomer Sample Search...  

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relationship for the alpha decay... life-time was derived on the ground of the fission theory of alpha ... Source: Ecole Polytechnique, Centre de mathmatiques Collection:...

314

E-Print Network 3.0 - alpha particle energy Sample Search Results  

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to mirror machines can benefit this concept by efficiently redirecting alpha particle energy... -transverse wave propagation. As a result, modes suitable for alpha particle...

315

E-Print Network 3.0 - alpha particle effects Sample Search Results  

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to mirror machines can benefit this concept by efficiently redirecting alpha particle energy... -transverse wave propagation. As a result, modes suitable for alpha particle...

316

E-Print Network 3.0 - alpha particle counting Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

alpha particles. (b) Daily cosmic ray count rate... alpha particles from SWOOPS. (b) Hourly average cosmic ray count rate from COSPINKET instrument. (c... particle...

317

E-Print Network 3.0 - alpha particles Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: Differential Flow Between Solar Wind Protons and Alpha J Particles: First WIND Observations . T... Flight Center, Greenbelt, Maryland w Abstract. Alpha particle and...

318

anti-tcr alpha beta: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Yu. G. Zdesenko 2004-04-13 7 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Physics Websites Summary: Alpha...

319

alpha 1-3gal beta: Topics by E-print Network  

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Yu. G. Zdesenko 2004-04-13 7 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Physics Websites Summary: Alpha...

320

alpha beta t-cell: Topics by E-print Network  

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Yu. G. Zdesenko 2004-04-13 15 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Physics Websites Summary: Alpha...

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321

E-Print Network 3.0 - alpha-epsilon phase transition Sample Search...  

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Kappa Alpha 2.97 Panhellenic Council (PC) Alpha ... Source: Wu, Shin-Tson - School of Optics (CREOLE), University of Central Florida Collection: Materials Science 12...

322

E-Print Network 3.0 - alpha particles biological effects Sample...  

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Heavy Charged) Particles The specific ionization of alpha particles follows a Bragg curve. Alphas... ;ARS, 23.03.11 Radiation ... Source: Kolbe, Edwin - Department fr...

323

E-Print Network 3.0 - alpha-particle emitting 211at Sample Search...  

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Elsevier Ltd. All rights reserved. 1. Introduction Alpha particles emitted from the naturally occurring... Studying effects of Magnolol on alpha-particle induced bystander...

324

E-Print Network 3.0 - alpha particles emitted Sample Search Results  

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Ltd. All rights reserved. 1. Introduction Alpha particles emitted from the naturally occurring... Studying effects of Magnolol on alpha-particle induced bystander effects using...

325

E-Print Network 3.0 - alpha particle emitting Sample Search Results  

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Ltd. All rights reserved. 1. Introduction Alpha particles emitted from the naturally occurring... Studying effects of Magnolol on alpha-particle induced bystander effects using...

326

E-Print Network 3.0 - alpha 6a continuous Sample Search Results  

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and Information Sciences 68 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Summary: Alpha Backgrounds and Their...

327

E-Print Network 3.0 - alpha angular correlations Sample Search...  

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Biology and Medicine 75 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Summary: Alpha Backgrounds and Their...

328

E-Print Network 3.0 - alpha-decay branching ratios Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Resources ; Chemistry 27 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Summary: A Rudimentary Model for Alpha...

329

E-Print Network 3.0 - alpha decay properties Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collection: Mathematics 24 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Summary: Alpha Backgrounds and Their...

330

E-Print Network 3.0 - alpha detector lrad Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Group Collection: Physics 94 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Summary: of alpha-emitting isotopes in...

331

E-Print Network 3.0 - alpha decay scheme Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collection: Mathematics 26 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Summary: Alpha Backgrounds and Their...

332

E-Print Network 3.0 - absolute cap alpha Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sciences and Ecology 45 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Summary: Alpha Backgrounds and Their...

333

E-Print Network 3.0 - alpha decay energies Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Information Sciences 35 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Summary: Alpha Backgrounds and Their...

334

E-Print Network 3.0 - alpha particle-emitting isotopes Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sciences ; Engineering 78 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Summary: . An alpha particle, emitted...

335

E-Print Network 3.0 - alpha low-level stored Sample Search Results  

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Plasma Physics and Fusion 51 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Summary: alpha backgrounds. ix 12;WIPP:...

336

E-Print Network 3.0 - alpha decay widths Sample Search Results  

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Collection: Physics 18 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Summary: Alpha Backgrounds and Their...

337

E-Print Network 3.0 - alpha beta-gamma shielded Sample Search...  

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Sciences and Ecology 51 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Summary: Alpha Backgrounds and Their...

338

E-Print Network 3.0 - alpha decay detection Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collection: Chemistry 30 Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Summary: Alpha Backgrounds and Their...

339

Thick-Target Neutron Yield from the 19F(alpha,n) Reaction  

E-Print Network [OSTI]

Thick-target neutron yields from the 19F(alpha,n) reaction are reported for E(alpha) = 3.5 - 10.0 MeV.

E. B. Norman; T. E. Chupp; K. T. Lesko; G. L. Woodruff; P. J. Grant

2014-11-01T23:59:59.000Z

340

E-Print Network 3.0 - alpha phase predicts Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the Sun-Earth-Alpha-Beta geometry at the photometric mutual event... (Alpha) is an unconsolidated gravitational aggregate with a spin period ... Source: Scheeres, Daniel J. -...

Note: This page contains sample records for the topic "alpha excluding radon" from the National Library of EnergyBeta (NLEBeta).
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to obtain the most current and comprehensive results.


341

E-Print Network 3.0 - alpha-particle mediated depletion Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

have been traversed with a single alpha particle each. Pretreatment of cells... with a low dose of X-rays four hours before alpha ... Source: Nevis Laboratories, Radiological...

342

E-Print Network 3.0 - alpha pparalpha protects Sample Search...  

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Ecole Polytechnique, Centre de mathmatiques Collection: Mathematics 14 A Practical Guide to working with AlphaScreen Summary: A Practical Guide to working with AlphaScreen...

343

E-Print Network 3.0 - alpha fetoprotein radioimmunoassay Sample...  

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test Alpha-fetoprotein (AFP), Estriol, h... , Benefits for Alpha-Fetoprotein IV Screening Test, Benefits for Treatment of Genetic Errors of Metabolism Source: Lammers, Peter J. -...

344

E-Print Network 3.0 - alpha spectrometry 232u Sample Search Results  

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for thermal ionization mass spectrometry (TIMS) and 800 mg for alpha spectrom- etry. Uranium-thorium TIMS... . Alpha spectrometry was performed at the University of Iowa....

345

Non-resonant triple alpha reaction rate at low temperature  

SciTech Connect (OSTI)

Our experimental goal is to study the non-resonant triple alpha reaction rate at low temperture (T < 10{sup 8} K). The {sup 13}C(p,d) reaction at 66 MeV has been used to probe the alpha-unbound continuum state in {sup 12}C just below the 2{sup nd} 0{sup +} state at 7.65 MeV. The transition strength to the continuum state is predicted to be sensitive to the non-resonant triple alpha reaction rate. The experiment has been performed at iThemba LABS. We report the present status of the experiment.

Itoh, T.; Tamii, A.; Aoi, N.; Fujita, H.; Hashimoto, T.; Miki, K.; Ogata, K. [Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047 (Japan); Carter, J.; Donaldson, L.; Sideras-Haddad, E. [Schools of Physics, University of Witwatersrand, Johannesburg 2050 (South Africa); Furuno, T.; Kawabata, T. [Departments of Physics, Kyoto University, Sakyo, Kyoto, 606-8502 (Japan); Kamimura, M. [RIKEN Nishina Center, Wako, Saitama, 351-0198 (Japan); Nemulodi, F.; Neveling, R.; Smit, F. D.; Swarts, C. [iThemba Laboratory for Accelerator Based Sciences Somerset, West, 7129 (South Africa)

2014-05-02T23:59:59.000Z

346

Single and double grid long-range alpha detectors  

DOE Patents [OSTI]

Alpha particle detectors capable of detecting alpha radiation from distant sources. In one embodiment, a voltage is generated in a single electrically conductive grid while a fan draws air containing air molecules ionized by alpha particles through an air passage and across the conductive grid. The current in the conductive grid can be detected and used for measurement or alarm. Another embodiment builds on this concept and provides an additional grid so that air ions of both polarities can be detected. The detector can be used in many applications, such as for pipe or duct, tank, or soil sample monitoring.

MacArthur, Duncan W. (Los Alamos, NM); Allander, Krag S. (Ojo Caliente, NM)

1993-01-01T23:59:59.000Z

347

Single and double grid long-range alpha detectors  

DOE Patents [OSTI]

Alpha particle detectors capable of detecting alpha radiation from distant sources. In one embodiment, a voltage is generated in a single electrically conductive grid while a fan draws air containing air molecules ionized by alpha particles through an air passage and across the conductive grid. The current in the conductive grid can be detected and used for measurement or alarm. Another embodiment builds on this concept and provides an additional grid so that air ions of both polarities can be detected. The detector can be used in many applications, such as for pipe or duct, tank, or soil sample monitoring.

MacArthur, D.W.; Allander, K.S.

1993-03-16T23:59:59.000Z

348

alpha cell development: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

being catalyst. The range of fuels has further been extended to include ethanol and coal syn-gas by development 206 alphas and the tau hadronic width HEP - Phenomenology (arXiv)...

349

Role of Hepatocyte Nuclear Factor 4 alpha in Hepatocyte Proliferation  

E-Print Network [OSTI]

Hepatocyte Nuclear Factor 4 alpha (HNF4?) is the master regulator of hepatocyte differentiation. It is involved in the up-regulation of genes involved in many classic hepatic functions including: bile acid metabolism, ...

Walesky, Chad Michael

2014-05-31T23:59:59.000Z

350

alpha 1-noradrenergic receptors: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(more) Hayes, Brian Joseph 2014-01-01 2 Estrogen Receptor Alpha as a Key Target of Red Wine Polyphenols Action on the Endothelium Physics Websites Summary: -F, et al. (2010)...

351

alpha receptor antagosist: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(more) Hayes, Brian Joseph 2014-01-01 2 Estrogen Receptor Alpha as a Key Target of Red Wine Polyphenols Action on the Endothelium Physics Websites Summary: -F, et al. (2010)...

352

alpha decay chains: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Das; G. Gangopadhyay 2004-03-12 46 Alpha Backgrounds for HPGe Detectors in Neutrinoless Double-Beta Decay Experiments Nuclear Experiment (arXiv) Summary: The Majorana Experiment...

353

alpha beta gamma: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the decoupling limit, M2A0 gg M2Z, the heavy CP-even, CP-odd and charged Higgs boson masses are nearly degenerate, sin(beta-alpha) approaches 1, and the...

354

alpha emitting radionuclides: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

on the response function of a TeO2 bolometer to alpha's emitted by 147Sm dissolved in the crystal at the growth phase. A Quenching Factor of (1.0076pm...

355

alpha spectra: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Variations of alpha can be considered as one of the most reliable method to constrain the dark energy equation of state and improvements on the accuracy of the wavelength...

356

{alpha}-cluster states in N{ne}Z nuclei  

SciTech Connect (OSTI)

The importance of studies of {alpha}-Cluster structure in N{ne}Z light nuclei is discussed. Spin-parity assignments for the low-lying levels in {sup 10}C are suggested.

Goldberg, V. Z.; Rogachev, G. V. [Cyclotron Institute, Texas A and M University, College Station, TX (United States); Department of Physics, Florida State University, Tallahassee, FL (United States) and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing (United States)

2012-10-20T23:59:59.000Z

357

alpha methanotrophs provide: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

present review provides an update on alphas measurements from the past year. W. J. Stirling 1997-09-23 3 2002 Blackwell Science Ltd Estimation of methanotroph abundance in a...

358

alpha-proteobacterium sinorhizobium meliloti: Topics by E-print...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: Supplementary Fig. S1. Alignment of the last 36 amino acidic residues (HemP domain) of some HmuP homologues from the alpha, beta, gamma, delta and epsilon...

359

Energetics of [alpha]-helix formation in peptides and proteins  

E-Print Network [OSTI]

This thesis focuses on the energetics of !-helix formation in peptides and proteins. The [alpha]-helix is the most prevalent type of secondary structure found in proteins, and has arguably dominated our thinking about ...

Schubert, Christian Reinhold

2009-01-01T23:59:59.000Z

360

alpha interacting tip60: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

alpha-cluster wave function is assumed to be a simple harmonic-oscillator shell-model wave function. A new method is proposed to derive the direct and knock-on terms of the...

Note: This page contains sample records for the topic "alpha excluding radon" 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

Labeled ALPHA4BETA2 ligands and methods therefor  

DOE Patents [OSTI]

Contemplated compositions and methods are employed to bind in vitro and in vivo to an .alpha.4.beta.2 nicotinic acetylcholine receptor in a highly selective manner. Where such compounds are labeled, compositions and methods employing such compounds can be used for PET and SPECT analysis. Alternatively, and/or additionally contemplated compounds can be used as antagonists, partial agonists or agonists in the treatment of diseases or conditions associated with .alpha.4.beta..beta.2 dysfunction.

Mukherjee, Jogeshwar; Pichika, Ramaiah; Potkin, Steven; Leslie, Frances; Chattopadhyay, Sankha

2013-02-19T23:59:59.000Z

362

Evaporation of alpha particles from $^31$P nucleus  

E-Print Network [OSTI]

The energy spectra of alpha particles have been measured in coincidence with the evaporation residues for the decay of the compound nucleus $^31$P produced in the reaction $^19$F (96 MeV) + $^12$C. The data have been compared with the predictions of the statistical model code CASCADE. It has been observed that significant deformation effect in the compound nucleus need to be considered in order to explain the shape of the evaporated alpha particle energy spectra.

D. Bandyopadhyay; S. K. Basu; C. Bhattacharya; S. Bhattacharya; K. Krishan; A. Chatterjee; S. Kailas; A. Navin; A. Srivastava

1998-07-24T23:59:59.000Z

363

Quantum Monte Carlo calculations of neutron-alpha scattering  

E-Print Network [OSTI]

We describe a new method to treat low-energy scattering problems in few-nucleon systems, and we apply it to the five-body case of neutron-alpha scattering. The method allows precise calculations of low-lying resonances and their widths. We find that a good three-nucleon interaction is crucial to obtain an accurate description of neutron-alpha scattering.

Kenneth M. Nollett; Steven C. Pieper; R. B. Wiringa; J. Carlson; G. M. Hale

2006-12-09T23:59:59.000Z

364

Mapping the Cosmic Web with Ly-alpha Emission  

E-Print Network [OSTI]

We use a high-resolution cosmological simulation to predict the distribution of HI Ly-alpha emission from the low-redshift (z10^2 kpc) ``coronae'' of optically thin gas with Ly-alpha surface brightness close to the expected background. Most of these regions contain smaller cores of dense, cool gas. Unless self-shielded gas is able to cool to Tweb.

Steven Furlanetto; Joop Schaye; Volker Springel; Lars Hernquist

2003-10-31T23:59:59.000Z

365

Countries Diesel Prices Excluding Taxes  

Gasoline and Diesel Fuel Update (EIA)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) " ,"Click worksheet9,1,50022,3,,,,6,1,,781Title: Telephone:shortOilCompanyexcluding taxes) Date Belgium

366

{alpha}-decay spectroscopy of deformed nuclei reexamined  

SciTech Connect (OSTI)

We perform an extensive analysis of {alpha}-decays to 2{sup +} and 4{sup +} states in deformed even-even nuclei by using the stationary coupled channels approach. Collective excitations are described within the rigid rotor model. The {alpha}-nucleus interaction is given by a double folding procedure with M3Y plus Coulomb nucleon-nucleon forces. We use a repulsive potential with one independent parameter in order to localize the {alpha}-particle on the nuclear surface and to fit the experimental Q-value. The decaying state is identified with the first resonance inside the resulting pocket-like potential, as suggested by microscopic calculations. We obtain a good agreement with existing experimental data concerning decay widths to J=2{sup +},4{sup +} states. The total {alpha}-decay half-lives agrees very well with experimental values by fitting the spectroscopic factor in terms of charge and neutron numbers separately for Z<82 and Z>82. We give predictions for intensities and hindrance factors for 52 even-even {alpha}-emitters with {beta}{sub 2}>0.15 and E{sub 2{sup +}}<200 kev. Comparison between the phenomenological and microscopic spectroscopic factors revealed large {alpha}-clustering components for nuclei close and above N=82,Z=82,N=126 magic numbers.

Peltonen, S.; Suhonen, J. [Department of Physics, University of Jyvaeskylae, POB 35, FIN-40351, Jyvaeskylae (Finland); Delion, D. S. [National Institute of Physics and Nuclear Engineering, Atomistilor 407, Bucharest-Magurele, 077125 (Romania); Academy of Romanian Scientists, 54 Splaiul Independentei, Bucharest, 050085 (Romania)

2008-09-15T23:59:59.000Z

367

RAYLEIGH-TAYLOR STRENGTH EXPERIMENTS OF THE PRESSURE-INDUCED alpha->epsilon->alpha' PHASE TRANSITION IN IRON  

SciTech Connect (OSTI)

We present here the first dynamic Rayleigh-Taylor (RT) strength measurement of a material undergoing solid-solid phase transition. Iron is quasi-isentropically driven across the pressure-induced bcc ({alpha}-Fe) {yields} hcp ({var_epsilon}-Fe) phase transition and the dynamic strength of the {alpha}, {var_epsilon} and reverted {alpha}{prime} phases have been determined via proton radiography of the resulting Rayleigh-Taylor unstable interface between the iron target and high-explosive products. Simultaneous velocimetry measurements of the iron free surface yield the phase transition dynamics and, in conjunction with detailed hydrodynamic simulations, allow for determination of the strength of the distinct phases of iron. Forward analysis of the experiment via hydrodynamic simulations reveals significant strength enhancement of the dynamically-generated {var_epsilon}-Fe and reverted {alpha}{prime}-Fe, comparable in magnitude to the strength of austenitic stainless steels.

Belof, J L; Cavallo, R M; Olson, R T; King, R S; Gray, G T; Holtkamp, D B; Chen, S R; Rudd, R E; Barton, N R; Arsenlis, A; Remington, B A; Park, H; Prisbrey, S T; Vitello, P A; Bazan, G; Mikaelian, K O; Comley, A J; Maddox, B R; May, M J

2011-08-10T23:59:59.000Z

368

pp, pA and. cap alpha cap alpha. collisions and the understanding of the quark-gluon plasma  

SciTech Connect (OSTI)

Global characteristics of heavy ion collisions at high energy are now understood at some level such that the challenging search for Quark-Gluon plasma signatures becomes of more importance. Some features of pp, pA, and ..cap alpha../ alpha/ interactions at ..sqrt..s less than or equal to 62 GeV are selected to illustrate potential consequences for, and problems of, investigations of the Quark-Gluon plasma. 35 refs., 8 figs.

Geist, W.M.

1988-06-01T23:59:59.000Z

369

Measurements of DT alpha particle loss near the outer midplane of TFTR  

SciTech Connect (OSTI)

Measurements of DT alpha particle loss to the outer midplane region of TFTR have been made using a radially movable scintillator detector. The conclusion from this data is that mechanisms determining the DT alpha loss to the outer midplane are not substantially different from those for DD fusion products. Some of these results are compared with a simplified theoretical model for TF ripple-induced alpha loss, which is expected to be the dominant classical alpha loss mechanism near the outer midplane. An example of plasma-driven MHD-induced alpha particle loss is shown, but no signs of any ``collective`` alpha instability-induced alpha loss have yet been observed.

Zweben, S.J.; Darrow, D.S.; Herrmann, H.W.; Redi, M.H.; Schivell, J.; White, R.B.

1995-07-01T23:59:59.000Z

370

Jet Production in ep Collisions at High $Q^2$ and Determination of $\\alpha_s$  

E-Print Network [OSTI]

The production of jets is studied in deep-inelastic ep scattering at large negative four momentum transfer squared 150alpha_s(M_Z) = 0.1168 +/-0.0007 (exp.) +0.0046/-0.0030 (th.) +/-0.0016(pdf).

Aaron, FD; 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; Faulkner, P J W; Favart, L; Fedotov, A; Felst, R; Feltesse, J; Ferencei, J; Fischer, D -J; Fleischer, M; Fomenko, A; Gabathuler, E; Gayler, J; Ghazaryan, Samvel; 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; Jemanov, V; 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; Korbel, V; 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; Naroska, B; 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; Sheviakov, I; 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

2010-01-01T23:59:59.000Z

371

Radiation Protection Dosimetry Vol. 97, No. 1, pp. 6973 (2001)  

E-Print Network [OSTI]

-ionising radiations such as alpha particles (e.g. radon, plutonium workers, individuals exposed to depleted uranium

Brenner, David Jonathan

372

MONTE CARLO CALCULATIONS OF LR115 DETECTOR RESPONSE TO 222  

E-Print Network [OSTI]

(4):414­419; 2000 Key words: Monte Carlo; radon progeny; detector, alpha- track; thoron INTRODUCTION THE LR115

Yu, K.N.

373

3alpha clustering in the excited states of 16C  

E-Print Network [OSTI]

The alpha cluster states of 16C are investigated by using the antisymmetrized molecular dynamics. It is shown that two different types of alpha cluster states exist: triangular and linear-chain states. The former has an approximate isosceles triangular configuration of alpha particles surrounded by four valence neutrons occupying sd-shell, while the latter has the linearly aligned alpha particles with two sd-shell neutrons and two pf-shell neutrons. It is found that the structure of the linear-chain state is qualitatively understood in terms of the 3/2 pi- and 1/2 sigma- molecular orbit as predicted by molecular-orbital model, but there exists non-negligible Be+alpha+2n correlation. The band-head energies of the triangular and linear-chain rotational bands are 8.0 and 15.5 MeV, and the latter is close to the He+Be threshold energy. It is also shown that the linear-chain state becomes the yrast sstate at J=10 with excitation energy 27.8 MeV owing to its very large moment-of-inertia comparable with hyperdeformation.

T. Baba; Y. Chiba; M. Kimura

2014-10-03T23:59:59.000Z

374

Alpha-beta coordination method for collective search  

DOE Patents [OSTI]

The present invention comprises a decentralized coordination strategy called alpha-beta coordination. The alpha-beta coordination strategy is a family of collective search methods that allow teams of communicating agents to implicitly coordinate their search activities through a division of labor based on self-selected roles and self-determined status. An agent can play one of two complementary roles. An agent in the alpha role is motivated to improve its status by exploring new regions of the search space. An agent in the beta role is also motivated to improve its status, but is conservative and tends to remain aggregated with other agents until alpha agents have clearly identified and communicated better regions of the search space. An agent can select its role dynamically based on its current status value relative to the status values of neighboring team members. Status can be determined by a function of the agent's sensor readings, and can generally be a measurement of source intensity at the agent's current location. An agent's decision cycle can comprise three sequential decision rules: (1) selection of a current role based on the evaluation of the current status data, (2) selection of a specific subset of the current data, and (3) determination of the next heading using the selected data. Variations of the decision rules produce different versions of alpha and beta behaviors that lead to different collective behavior properties.

Goldsmith, Steven Y. (Albuquerque, NM)

2002-01-01T23:59:59.000Z

375

EXTENDED Ly{alpha} EMISSION AROUND STAR-FORMING GALAXIES  

SciTech Connect (OSTI)

Ly{alpha} photons that escape the interstellar medium of star-forming galaxies may be resonantly scattered by neutral hydrogen atoms in the circumgalactic and intergalactic media, thereby increasing the angular extent of the galaxy's Ly{alpha} emission. We present predictions of this extended, low surface brightness Ly{alpha} emission based on radiative transfer modeling in a cosmological reionization simulation. The extended emission can be detected from stacked narrowband images of Ly{alpha} emitters (LAEs) or of Lyman break galaxies (LBGs). Its average surface brightness profile has a central cusp, then flattens to an approximate plateau beginning at an inner characteristic scale below {approx}0.2 Mpc (comoving), then steepens again beyond an outer characteristic scale of {approx}1 Mpc. The inner scale marks the transition from scattered light of the central source to emission from clustered sources, while the outer scale marks the spatial extent of scattered emission from these clustered sources. Both scales tend to increase with halo mass, UV luminosity, and observed Ly{alpha} luminosity. The extended emission predicted by our simulation is already within reach of deep narrowband photometry using large ground-based telescopes. Such observations would test radiative transfer models of emission from LAEs and LBGs, and they would open a new window on the circumgalactic environment of high-redshift star-forming galaxies.

Zheng Zheng [Yale Center For Astronomy and Astrophysics, Yale University, New Haven, CT 06520 (United States); Cen Renyue [Department of Astrophysical Sciences, Princeton University, Peyton Hall, Ivy Lane, Princeton, NJ 08544 (United States); Weinberg, David [Department of Astronomy, Ohio State University, Columbus, OH 43210 (United States); Trac, Hy [Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213 (United States); Miralda-Escude, Jordi, E-mail: zheng.zheng@yale.edu [Institucio Catalana de Recerca i Estudis Avancats, Barcelona (Spain)

2011-10-01T23:59:59.000Z

376

Alpha decay self-damage in cubic and monoclinic zirconolite  

SciTech Connect (OSTI)

Samples of primarily-monoclinic /sup 238/Pu-doped zirconolite were stored at ambient temperature to allow accumulation of alpha decay self-damage to a dose of 1 x 10/sup 24/ ..cap alpha../m/sup 3/ (equivalent to a SYNROC age of approx. 10/sup 3/y). Bulk swelling reached 2.3 vol% with no tendency toward saturation, a damage response similar to that observed for cubic Pu-doped zirconolite. X-ray volumetric swelling at 4 x 10/sup 24/ ..cap alpha../m/sup 3/ was 1 vol%, considerably less than that for the cubic material. Changes in cell dimensions differed significantly from those reported by others for a monoclinic natural mineral. Extensive microcracking was observed, and is attributed at least partially to swelling differences between the matrix and minor phases.

Clinard, F.W. Jr.; Land, C.C.; Peterson, D.E.; Rohr, D.L.; Roof, R.B.

1981-01-01T23:59:59.000Z

377

Continuous air monitor for alpha-emitting aerosol particles  

SciTech Connect (OSTI)

A new alpha Continuous Air Monitor (CAM) sampler is being developed for use in detecting the presence of alpha-emitting aerosol particles. The effort involves design, fabrication and evaluation of systems for the collection of aerosol and for the processing of data to speciate and quantify the alpha emitters of interest. At the present time we have a prototype of the aerosol sampling system and we have performed wind tunnel tests to characterize the performance of the device for different particle sizes, wind speeds, flow rates and internal design parameters. The results presented herein deal with the aerosol sampling aspects of the new CAM sampler. Work on the data processing, display and alarm functions is being done in parallel with the particle sampling work and will be reported separately at a later date. 17 refs., 5 figs., 3 tabs.

McFarland, A.R.; Ortiz, C.A. (Texas A and M Univ., College Station, TX (USA). Dept. of Mechanical Engineering); Rodgers, J.C.; Nelson, D.C. (Los Alamos National Lab., NM (USA))

1990-01-01T23:59:59.000Z

378

Apparatus for detecting alpha radiation in difficult access areas  

DOE Patents [OSTI]

An electrostatic alpha radiation detector for measuring alpha radiation emitted from inside an enclosure comprising an electrically conductive expandable electrode for insertion into the enclosure. After insertion, the electrically conductive expandable electrode is insulated from the enclosure and defines a decay cavity between the electrically conductive expandable electrode and the enclosure so that air ions generated in the decay cavity are electrostatically captured by the electrically conductive expandable electrode and the enclosure when an electric potential is applied between the electrically conductive expandable electrode and the enclosure. Indicator means are attached to the electrically conductive expandable electrode for indicating an electrical current produced by generation of the air ions generated in the decay cavity by collisions between air molecules and the alpha particles emitted from the enclosure. A voltage source is connected between the indicator means and the electrically conductive enclosure for creating an electric field between the electrically conductive expandable electrode and the enclosure.

Steadman, Peter (Santa Fe, NM); MacArthur, Duncan W. (Los Alamos, NM)

1997-09-02T23:59:59.000Z

379

Apparatus for detecting alpha radiation in difficult access areas  

DOE Patents [OSTI]

An electrostatic alpha radiation detector for measuring alpha radiation emitted from inside an enclosure comprising an electrically conductive expandable electrode for insertion into the enclosure is disclosed. After insertion, the electrically conductive expandable electrode is insulated from the enclosure and defines a decay cavity between the electrically conductive expandable electrode and the enclosure so that air ions generated in the decay cavity are electrostatically captured by the electrically conductive expandable electrode and the enclosure when an electric potential is applied between the electrically conductive expandable electrode and the enclosure. Indicator means are attached to the electrically conductive expandable electrode for indicating an electrical current produced by generation of the air ions generated in the decay cavity by collisions between air molecules and the alpha particles emitted from the enclosure. A voltage source is connected between the indicator means and the electrically conductive enclosure for creating an electric field between the electrically conductive expandable electrode and the enclosure. 4 figs.

Steadman, P.; MacArthur, D.W.

1997-09-02T23:59:59.000Z

380

Indirect Measurements for (p,{alpha}) Reactions Involving Boron Isotopes  

SciTech Connect (OSTI)

Light elements lithium, beryllium and boron (LiBeB) were used in the last years as 'possible probe' for a deeper understanding of some extra-mixing phenomena occurring in young Main-Sequence stars. They are mainly destroyed by (p,{alpha}) reactions and cross section measurements for such channels are then needed. The Trojan Horse Method (THM) allows one to extract the astrophysical S(E)-factor without the experience of tunneling through the Coulomb barrier. In this work a resume of the recent results about the {sup 11}B(p,{alpha}{sub 0}){sup 8}Be and {sup 10}B(p,{alpha}){sup 7}Be reactions is shown.

Lamia, L.; Spitaleri, C.; Romano, S.; Cherubini, S.; Crucilla, V.; Gulino, M.; La Cognata, M.; Pizzone, R. G.; Puglia, S. M. R.; Sergi, M. L.; Tudisco, S.; Tumino, A. [Laboratori Nazionali del Sud, Catania (Italy); Dipartimento di Metodologie Fisiche e Chimiche per l'Ingegneria, Universita di Catania, Catania (Italy); Carlin, N.; Szanto, M. G. del; Liguori Neto, R.; Moura, M. M. de; Munhoz, M. G.; Souza, F. A.; Suaide, A. A. P.; Szanto, E. [Departamento de Fisica Nuclear, Universitade de Sao Paulo, Sao Paulo (Brazil)] (and others)

2008-04-06T23:59:59.000Z

Note: This page contains sample records for the topic "alpha excluding radon" 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

Collectivity in the light radon nuclei measured directly via Coulomb excitation  

E-Print Network [OSTI]

Background: Shape coexistence in heavy nuclei poses a strong challenge to state-of-the-art nuclear models, where several competing shape minima are found close to the ground state. A classic region for investigating this phenomenon is in the region around $Z=82$ and the neutron mid-shell at $N=104$. Purpose: Evidence for shape coexistence has been inferred from $\\alpha$-decay measurements, laser spectroscopy and in-beam measurements. While the latter allow the pattern of excited states and rotational band structures to be mapped out, a detailed understanding of shape coexistence can only come from measurements of electromagnetic matrix elements. Method: Secondary, radioactive ion beams of $^{202}$Rn and $^{204}$Rn were studied by means of low-energy Coulomb excitation at the REX-ISOLDE facility in CERN. Results: The electric-quadrupole ($E2$) matrix element connecting the ground state and first-excited $2^{+}_{1}$ state was extracted for both $^{202}$Rn and $^{204}$Rn, corresponding to ${B(E2;2^{+}_{1} \\to 2^...

Gaffney, L P; Jenkins, D G; Andreyev, A N; Bender, M; Blazhev, A; Bree, N; Bruyneel, B; Butler, P A; Cocolios, T E; Davinson, T; Deacon, A N; De Witte, H; DiJulio, D; Diriken, J; Ekstrm, A; Fransen, Ch; Freeman, S J; Geibel, K; Grahn, T; Hadinia, B; Hass, M; Heenen, P -H; Hess, H; Huyse, M; Jakobsson, U; Kesteloot, N; Konki, J; Krll, Th; Kumar, V; Ivanov, O; Martin-Haugh, S; Mcher, D; Orlandi, R; Pakarinen, J; Petts, A; Peura, P; Rahkila, P; Reiter, P; Scheck, M; Seidlitz, M; Singh, K; Smith, J F; Van de Walle, J; Van Duppen, P; Voulot, D; Wadsworth, R; Warr, N; Wenander, F; Wimmer, K; Wrzosek-Lipska, K; Zieli?ska, M

2015-01-01T23:59:59.000Z

382

The HI Properties and Environment of Lyman-alpha Absorbers  

E-Print Network [OSTI]

We present results from two projects in which we have used the HI 21cm emission line as a tracer of gas-rich galaxy populations in the vicinity of Lyman-alpha absorbers. In the first case, we examine the HI environment of SBS 1543+593, the nearest damped Lyman-alpha absorber. We use a VLA map of the region around this LSB galaxy which itself shows an extended HI disk to identify 3 gas rich neighbors within 185 kpc. While it is not clear whether we should expect local damped Lyman-alpha systems to reside in such gas-rich regions, we would expect this kind of environment to be more prevalent at higher redshifts where less of the gas is in the dense inner regions of galaxies or has been consumed by star formation. This local galaxy is the only system in which we can study the gaseous environment in this kind of detail. In the second case, we examine the HI environment surrounding 16 Lyman-alpha forest absorbers along 4 QSO sightlines. We do not detect any gas-rich galaxies at the absorber positions indicating that, at least down to our sensitivity limits, these absorption lines do not seem to be associated with galaxy halos. For half of the Lyman-alpha absorption systems there is a galaxy within 500 kpc, but for the other half there is not. In two cases there is no galaxy within 2 Mpc of the Lyman-alpha absorption systems indicating that absorbers do, in some cases, reside in voids.

J. L. Rosenberg

2005-04-20T23:59:59.000Z

383

First-principles elastic properties of (alpha)-Pu  

SciTech Connect (OSTI)

Density-functional electronic structure calculations have been used to investigate the ambient pressure and low temperature elastic properties of the ground-state {alpha} phase of plutonium metal. The electronic structure and correlation effects are modeled within a fully relativistic anti-ferromagnetic treatment with a generalized gradient approximation for the electron exchange and correlation functionals. The 13 independent elastic constants, for the monoclinic {alpha}-Pu system, are calculated for the observed geometry. A comparison of the results with measured data from resonant ultrasound spectroscopy for a cast sample is made.

Soderlind, P; Klepeis, J E

2008-11-04T23:59:59.000Z

384

First-principles elastic properties of (alpha)-Pu  

SciTech Connect (OSTI)

Density-functional electronic-structure calculations have been used to investigate the ambient pressure and low temperature elastic properties of the ground-state {alpha} phase of plutonium metal. The electronic structure and correlation effects are modeled within a fully relativistic antiferromagnetic treatment with a generalized gradient approximation for the electron exchange and correlation functional. The 13 independent elastic constants, for the monoclinic {alpha}-Pu system, are calculated for the observed geometry. A comparison of the results with measured data from recent resonant ultrasound spectroscopy for a cast sample is made.

Soderlind, P; Klepeis, J

2009-02-18T23:59:59.000Z

385

Inclusive-jet photoproduction at HERA and determination of alphas  

E-Print Network [OSTI]

Inclusive-jet cross sections have been measured in the reaction ep->e+jet+X for photon virtuality Q2 energies in the region 142 energy, ETjet, and pseudorapidity, etajet, for jets with ETjet > 17 GeV and -1 energy-scale dependence of the coupling was determined. The value of alphas(Mz) extracted from the measurements based on the kT jet algorithm is alphas(Mz) = 0.1206 +0.0023 -0.0022 (exp.) +0.0042 -0.0035 (th.); the results from the anti-kT and SIScone algorithms are compatible with this value and have a similar precision.

ZEUS Collaboration; H. Abramowicz; I. Abt; L. Adamczyk; M. Adamus; R. Aggarwal; S. Antonelli; P. Antonioli; A. Antonov; M. Arneodo; V. Aushev; Y. Aushev; O. Bachynska; A. Bamberger; A. N. Barakbaev; G. Barbagli; G. Bari; F. Barreiro; N. Bartosik; D. Bartsch; M. Basile; O. Behnke; J. Behr; U. Behrens; L. Bellagamba; A. Bertolin; S. Bhadra; M. Bindi; C. Blohm; V. Bokhonov; T. Bold; K. Bondarenko; E. G. Boos; K. Borras; D. Boscherini; D. Bot; I. Brock; E. Brownson; R. Brugnera; N. Brummer; A. Bruni; G. Bruni; B. Brzozowska; P. J. Bussey; B. Bylsma; A. Caldwell; M. Capua; R. Carlin; C. D. Catterall; S. Chekanov; J. Chwastowski; J. Ciborowski; R. Ciesielski; L. Cifarelli; F. Cindolo; A. Contin; A. M. Cooper-Sarkar; N. Coppola; M. Corradi; F. Corriveau; M. Costa; G. D'Agostini; F. Dal Corso; J. del Peso; R. K. Dementiev; S. De Pasquale; M. Derrick; R. C. E. Devenish; D. Dobur; B. A. Dolgoshein; G. Dolinska; A. T. Doyle; V. Drugakov; L. S. Durkin; S. Dusini; Y. Eisenberg; P. F. Ermolov; A. Eskreys; S. Fang; S. Fazio; J. Ferrando; M. I. Ferrero; J. Figiel; M. Forrest; B. Foster; G. Gach; A. Galas; E. Gallo; A. Garfagnini; A. Geiser; I. Gialas; A. Gizhko; L. K. Gladilin; D. Gladkov; C. Glasman; O. Gogota; Yu. A. Golubkov; P. Gottlicher; I. Grabowska-Bold; J. Grebenyuk; I. Gregor; G. Grigorescu; G. Grzelak; O. Gueta; M. Guzik; C. Gwenlan; T. Haas; W. Hain; R. Hamatsu; J. C. Hart; H. Hartmann; G. Hartner; E. Hilger; D. Hochman; R. Hori; K. Horton; A. Huttmann; Z. A. Ibrahim; Y. Iga; R. Ingbir; M. Ishitsuka; H. -P. Jakob; F. Januschek; T. W. Jones; M. Jungst; I. Kadenko; B. Kahle; S. Kananov; T. Kanno; U. Karshon; F. Karstens; I. I. Katkov; M. Kaur; P. Kaur; A. Keramidas; L. A. Khein; J. Y. Kim; D. Kisielewska; S. Kitamura; R. Klanner; U. Klein; E. Koffeman; N. Kondrashova; O. Kononeko; P. Kooijman; Ie. Korol; I. A. Korzhavina; A. Kotanski; U. Kotz; H. Kowalski; O. Kuprash; M. Kuze; A. Lee; B. B. Levchenko; A. Levy; V. Libov; S. Limentani; T. Y. Ling; M. Lisovyi; E. Lobodzinska; W. Lohmann; B. Lohr; E. Lohrmann; K. R. Long; A. Longhin; D. Lontkovskyi; O. Yu. Lukina; J. Maeda; S. Magill; I. Makarenko; J. Malka; R. Mankel; A. Margotti; G. Marini; J. F. Martin; A. Mastroberardino; M. C. K. Mattingly; I. -A. Melzer-Pellmann; S. Mergelmeyer; S. Miglioranzi; F. Mohamad Idris; V. Monaco; A. Montanari; J. D. Morris; K. Mujkic; B. Musgrave; K. Nagano; T. Namsoo; R. Nania; A. Nigro; Y. Ning; T. Nobe; U. Noor; D. Notz; R. J. Nowak; A. E. Nuncio-Quiroz; B. Y. Oh; N. Okazaki; K. Oliver; K. Olkiewicz; Yu. Onishchuk; K. Papageorgiu; A. Parenti; E. Paul; J. M. Pawlak; B. Pawlik; P. G. Pelfer; A. Pellegrino; W. Perlanski; H. Perrey; K. Piotrzkowski; P. Plucinski; N. S. Pokrovskiy; A. Polini; A. S. Proskuryakov; M. Przybycien; A. Raval; D. D. Reeder; B. Reisert; Z. Ren; J. Repond; Y. D. Ri; A. Robertson; P. Roloff; I. Rubinsky; M. Ruspa; R. Sacchi; U. Samson; G. Sartorelli; A. A. Savin; D. H. Saxon; M. Schioppa; S. Schlenstedt; P. Schleper; W. B. Schmidke; U. Schneekloth; V. Schonberg; T. Schorner-Sadenius; J. Schwartz; F. Sciulli; L. M. Shcheglova; R. Shehzadi; S. Shimizu; I. Singh; I. O. Skillicorn; W. Slominski; W. H. Smith; V. Sola; A. Solano; D. Son; V. Sosnovtsev; A. Spiridonov; H. Stadie; L. Stanco; N. Stefaniuk; A. Stern; T. P. Stewart; A. Stifutkin; P. Stopa; S. Suchkov; G. Susinno; L. Suszycki; J. Sztuk-Dambietz; D. Szuba; J. Szuba; A. D. Tapper; E. Tassi; J. Terron; T. Theedt; H. Tiecke; K. Tokushuku; J. Tomaszewska; V. Trusov; T. Tsurugai; M. Turcato; O. Turkot; T. Tymieniecka; M. Vazquez; A. Verbytskyi; O. Viazlo; N. N. Vlasov; R. Walczak; W. A. T. Wan Abdullah; J. J. Whitmore; L. Wiggers; M. Wing; M. Wlasenko; G. Wolf; H. Wolfe; K. Wrona; A. G. Yagues-Molina; S. Yamada; Y. Yamazaki; R. Yoshida; C. Youngman; O. Zabiegalov; A. F. Zarnecki; L. Zawiejski; O. Zenaiev; W. Zeuner; B. O. Zhautykov; N. Zhmak; C. Zhou; A. Zichichi; Z. Zolkapli; D. S. Zotkin

2012-05-28T23:59:59.000Z

386

Standoff alpha radiation detection via excited state absorption of air  

SciTech Connect (OSTI)

A standoff alpha radiation detection technique based on the physical mechanism of excited state absorption of air molecules was explored and is presented in this paper. Instead of directly detecting the radiation via measuring the intensity of radiation induced air fluorescence, the radiation is detected via the excited state absorption of alpha radiation excited/ionized air molecules. Both theoretical analyses and experimental verifications were conducted. The experimental results confirmed that the radiation could be detected via excited state absorption of radiation excited/ionized air molecules at a 10 m standoff distance, which was consistent with the theoretical analyses.

Yao, Jimmy; Yin, Stuart Shizhuo [Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States)] [Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States); Brenizer, Jack [Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States)] [Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States); Hui, Rongqing [Department of Electrical Engineering and Computer Science, The University of Kansas, Lawrence, Kansas 66045 (United States)] [Department of Electrical Engineering and Computer Science, The University of Kansas, Lawrence, Kansas 66045 (United States)

2013-06-24T23:59:59.000Z

387

Alpha low-level stored waste systems design study  

SciTech Connect (OSTI)

The Stored Waste System Design Study (SWSDS), commissioned by the Waste Technology Development Department at the Idaho National Engineering Laboratory (INEL), examines relative life-cycle costs associated with three system concepts for processing the alpha low-level waste (alpha-LLW) stored at the Radioactive Waste Management Complex`s Transuranic Storage Area at the INEL. The three system concepts are incineration/melting; thermal treatment/solidification; and sort, treat, and repackage. The SWSDS identifies system functional and operational requirements and assesses implementability; effectiveness; cost; and demonstration, testing, and evaluation (DT&E) requirements for each of the three concepts.

Feizollahi, F.; Teheranian, B. [Morrison Knudson Corp., San Francisco, CA (United States). Environmental Services Div.; Quapp, W.J. [EG and G Idaho, Inc., Idaho Falls, ID (United States)

1992-08-01T23:59:59.000Z

388

Alpha low-level stored waste systems design study  

SciTech Connect (OSTI)

The Stored Waste System Design Study (SWSDS), commissioned by the Waste Technology Development Department at the Idaho National Engineering Laboratory (INEL), examines relative life-cycle costs associated with three system concepts for processing the alpha low-level waste (alpha-LLW) stored at the Radioactive Waste Management Complex's Transuranic Storage Area at the INEL. The three system concepts are incineration/melting; thermal treatment/solidification; and sort, treat, and repackage. The SWSDS identifies system functional and operational requirements and assesses implementability; effectiveness; cost; and demonstration, testing, and evaluation (DT E) requirements for each of the three concepts.

Feizollahi, F.; Teheranian, B. (Morrison Knudson Corp., San Francisco, CA (United States). Environmental Services Div.); Quapp, W.J. (EG and G Idaho, Inc., Idaho Falls, ID (United States))

1992-08-01T23:59:59.000Z

389

The effects of alpha particle irradiation on stainless steel  

E-Print Network [OSTI]

and an approximation based on the first year's fluence. . . . . . . . . 17 CHAPTER I INTRODUCTION The storage of Weapons Grade Plutonium (WGPu) pits has prompted this study of the effects of alpha particle irradiation on stainless steel. Previous studies of alpha... and properties of WGPu. ISOTOPE Pu-239 Pu-240 P0-241 Density* Crystal Structure* ATOMIC ABD. (/o) 94. 0 5. 8 0. 2 15. 7 g/cm' BCC 'Note: The density and crystal structure of elemental plutonium is 19. 7 g/cm' and FCC, respectively...

Shipp, John Douglas

1999-01-01T23:59:59.000Z

390

Chapter Advisor E-mail Alpha Delta Pi Courtney O'Neill-Chapter Advisor courtneyoneill2004@yahoo.com  

E-Print Network [OSTI]

Chapter Advisor E-mail Alpha Delta Pi Courtney O'Neill- Chapter Advisor courtneyoneill2004@yahoo.com Alpha Delta Pi Kendra Stewart-On Campus stewartk@cofc.edu Alpha Epsilon Pi Alex Green - Chapter Advisor Magwood- Chapater Advisor graymag7@bellsouth.net Alpha Kappa Alpha Debbie Counts-On-Campus countsd

Kunkle, Tom

391

Collectivity in the light radon nuclei measured directly via Coulomb excitation  

E-Print Network [OSTI]

Background: Shape coexistence in heavy nuclei poses a strong challenge to state-of-the-art nuclear models, where several competing shape minima are found close to the ground state. A classic region for investigating this phenomenon is in the region around $Z=82$ and the neutron mid-shell at $N=104$. Purpose: Evidence for shape coexistence has been inferred from $\\alpha$-decay measurements, laser spectroscopy and in-beam measurements. While the latter allow the pattern of excited states and rotational band structures to be mapped out, a detailed understanding of shape coexistence can only come from measurements of electromagnetic matrix elements. Method: Secondary, radioactive ion beams of $^{202}$Rn and $^{204}$Rn were studied by means of low-energy Coulomb excitation at the REX-ISOLDE facility in CERN. Results: The electric-quadrupole ($E2$) matrix element connecting the ground state and first-excited $2^{+}_{1}$ state was extracted for both $^{202}$Rn and $^{204}$Rn, corresponding to ${B(E2;2^{+}_{1} \\to 2^{+}_{1})=29^{+8}_{-8}}$ W.u. and $43^{+17}_{-12}$ W.u., respectively. Additionally, $E2$ matrix elements connecting the $2^{+}_{1}$ state with the $4^{+}_{1}$ and $2^{+}_{2}$ states were determined in $^{202}$Rn. No excited $0^{+}$ states were observed in the current data set, possibly due to a limited population of second-order processes at the currently-available beam energies. Conclusions: The results are discussed in terms of collectivity and the deformation of both nuclei studied is deduced to be weak, as expected from the low-lying level-energy schemes. Comparisons are also made to state-of-the-art beyond-mean-field model calculations and the magnitude of the transitional quadrupole moments are well reproduced.

L. P. Gaffney; A. P. Robinson; D. G. Jenkins; A. N. Andreyev; M. Bender; A. Blazhev; N. Bree; B. Bruyneel; P. A. Butler; T. E. Cocolios; T. Davinson; A. N. Deacon; H. De Witte; D. DiJulio; J. Diriken; A. Ekstrm; Ch. Fransen; S. J. Freeman; K. Geibel; T. Grahn; B. Hadinia; M. Hass; P. -H. Heenen; H. Hess; M. Huyse; U. Jakobsson; N. Kesteloot; J. Konki; Th. Krll; V. Kumar; O. Ivanov; S. Martin-Haugh; D. Mcher; R. Orlandi; J. Pakarinen; A. Petts; P. Peura; P. Rahkila; P. Reiter; M. Scheck; M. Seidlitz; K. Singh; J. F. Smith; J. Van de Walle; P. Van Duppen; D. Voulot; R. Wadsworth; N. Warr; F. Wenander; K. Wimmer; K. Wrzosek-Lipska; M. Zieli?ska

2015-03-11T23:59:59.000Z

392

the International Civil Aviation Organization (ICAO) adopted a resolution that not only accepted a long-term strat-egy for reducing emissions but also excluded language intended to prevent unilateral application of EU legislation  

E-Print Network [OSTI]

of atmospheric pollution, airliners cross many borders and fly through many regula- tory jurisdictions a long-term strat- egy for reducing emissions but also excluded language intended to prevent unilateral-standing disagreement between in- dustrialized and developing countries about preventing climate change. Secondly

Sibille, Etienne

393

CRAD, Management- Oak Ridge National Laboratory TRU ALPHA LLWT Project  

Broader source: Energy.gov [DOE]

A section of Appendix C to DOE G 226.1-2 "Federal Line Management Oversight of Department of Energy Nuclear Facilities." Consists of Criteria Review and Approach Documents (CRADs) used for a November 2003 assessment of the Management Program portion of an Operational Readiness Review of the Oak Ridge National Laboratory TRU ALPHA LLWT Project.

394

Physics of alpha channelling and related TFTR experiments  

E-Print Network [OSTI]

Physics of alpha channelling and related TFTR experiments N.J. Fisch Princeton Plasma Physics in magnetic fusion research centred on attaining plasmas close to thermonuclear condi- tions. Of particular interest was the heating of the plasma to thermonuclear temperatures, say, to at least 10 ke

395

Preparation of .alpha., .beta.-unsaturated carboxylic acids and anhydrides  

DOE Patents [OSTI]

Disclosed is a process for the preparation of .alpha.,.beta.-unsaturated carboxylic acids and anhydrides thereof which comprises contacting formaldehyde or a source of formaldehyde with a carboxylic anhydride in the presence of a catalyst comprising mixed oxides of vanadium, phosphorus and, optionally, a third component selected from titanium, aluminum or, preferably silicon.

Spivey, James Jerry (Cary, NC); Gogate, Makarand Ratnakav (Durham, NC); Zoeller, Joseph Robert (Kingsport, TN); Tustin, Gerald Charles (Kingsport, TN)

1998-01-01T23:59:59.000Z

396

Preparation of .alpha.,.beta.-unsaturated carboxylic acids and esters  

DOE Patents [OSTI]

Disclosed is a process for the preparation of .alpha.,.beta.-unsaturated carboxylic acids and esters thereof which comprises contacting formaldehyde or a source of formaldehyde with a carboxylic acid, ester or anhydride in the presence of a catalyst comprising an oxide of niobium.

Gogate, Makarand Ratnakar (Durham, NC); Spivey, James Jerry (Cary, NC); Zoeller, Joseph Robert (Kingsport, TN)

1998-01-01T23:59:59.000Z

397

Evaluation of probes used to detect alpha radiation  

E-Print Network [OSTI]

such probes were evaluated in this study, the 350A Alpha Probe of Dosimeter Corporation and the AB100 Scintillator Probe produced by Harshaw Bicron. As an additional comparison, a Ludlum Model 44-9 (Pancake) GM Probe was also evaluated, since it has served...

Sackett, Gregory Duane

1995-01-01T23:59:59.000Z

398

Preparation of {alpha},{beta}-unsaturated carboxylic acids and esters  

DOE Patents [OSTI]

Disclosed is a process for the preparation of {alpha},{beta}-unsaturated carboxylic acids and esters thereof which comprises contacting formaldehyde or a source of formaldehyde with a carboxylic acid, ester or anhydride in the presence of a catalyst comprising an oxide of niobium.

Gogate, M.R.; Spivey, J.J.; Zoeller, J.R.

1998-09-15T23:59:59.000Z

399

THE TWO REGIMES OF PHOTOSPHERIC MOTIONS IN {alpha} HYDRA  

SciTech Connect (OSTI)

High-resolution spectroscopic observations of {alpha} Hya were acquired between 2003 and 2010. Analysis of line shifts, differential shifts, line widths, and line bisectors points to two regimes of velocity fields in the photosphere of {alpha} Hya: (1) normal granulation embedded in (2) large convection cells. Variations occur on a wide range of timescales, from several years on down. Radial velocity variations, which are irregular and span 786 m s{sup -1}, have a distribution consistent with a true mean rise velocity of the large cells of {approx}725 m s{sup -1} and a dispersion of {approx}220 m s{sup -1}. The distribution of granulation velocities, as measured from the widths of spectral lines, shows only small variations, consistent with the two regime concepts. On the multi-year timescale, radial velocity changes, small temperature variations ({approx}10 K), and small line-width variations ({approx}<0.8%) track each other, possibly with phase shifts. The granulation velocity gradient for {alpha} Hya is about half as large as the Sun's and no variation with time was seen, implying that any variation in velocity gradient from one large cell to the next must be less than a few percent. The asymmetry in the granulation velocity distribution, as specified in the flux deficit, is smaller than expected for {alpha} Hya's position in the HR diagram and appears to be variable.

Gray, David F., E-mail: dfgray@uwo.ca [Department of Physics and Astronomy, University of Western Ontario, London, Ontario N6A 3K7 (Canada)

2013-02-10T23:59:59.000Z

400

Studying galaxy formation through Lyman alpha in emission and absorption  

E-Print Network [OSTI]

directly probe neutral hydrogen in the high redshift Universe. Ly? can be observed in absorption in Damped Lyman Alpha systems (DLAs): high Hi column density regions that dominate the neutral gas content of the Universe between z ? 0 ? 5. Ly? in emission...

Barnes, Luke Andrew

2010-01-12T23:59:59.000Z

Note: This page contains sample records for the topic "alpha excluding radon" 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

alpha absorption systems: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption systems First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Lyman alpha Absorption Systems and...

402

Method for the simultaneous preparation of radon-211, xenon-125, xenon-123, astatine-211, iodine-125 and iodine-123  

DOE Patents [OSTI]

The invention relates to a practical method for commercially producing radiopharmaceutical activities and, more particularly, relates to a method for the preparation of about equal amount of Radon-211 (/sup 211/Rn) and Xenon-125 (/sup 125/Xe) including a one-step chemical procedure following an irradiation procedure in which a selected target of Thorium (/sup 232/Th) or Uranium (/sup 238/U) is irradiated. The disclosed method is also effective for the preparation in a one-step chemical procedure of substantially equal amounts of high purity /sup 123/I and /sup 211/At. In one preferred arrangement of the invention almost equal quantities of /sup 211/Rn and /sup 125/Xe are prepared using a onestep chemical procedure in which a suitably irradiated fertile target material, such as thorium-232 or uranium-238, is treated to extract those radionuclides from it. In the same one-step chemical procedure about equal quantities of /sup 211/At and /sup 123/I are prepared and stored for subsequent use. In a modified arrangement of the method of the invention, it is practiced to separate and store about equal amounts of only /sup 211/Rn and /sup 125/Xe, while preventing the extraction or storage of the radionuclides /sup 211/At and /sup 123/I.

Mirzadeh, S.; Lambrecht, R.M.

1985-07-01T23:59:59.000Z

403

Biophysical modelling of the effects of inhaled radon progeny on the bronchial epithelium for the estimation of the relationships applied in the two stage clonal expansion model of carcinogenesis  

E-Print Network [OSTI]

There is a considerable debate between research groups applying the two stage clonal expansion model for lung cancer risk estimation, whether radon exposure affects initiation and transformation or promotion. The objective of the present study is to quantify the effects of radon progeny on these stages with biophysical models. For this purpose, numerical models of mutation induction and clonal growth were applied in order to estimate how initiation, transformation and promotion rates depend on tissue dose rate. It was found that rates of initiation and transformation increase monotonically with dose rate, while effective promotion rate decreases with time, but increases in a supralinear fashion with dose rate. Despite the uncertainty of the results due to the lack of experimental data, present study suggests that effects of radon exposure on both mutational events and clonal growth are significant, and should be considered in epidemiological analyses applying mathematical models of carcinogenesis.

Madas, Balzs G

2013-01-01T23:59:59.000Z

404

Estimation of the alpha decay half-lives D. N. Poenaru and M. Ivascu  

E-Print Network [OSTI]

semiempirical relationship is derived on the grounds of the fission theory of alpha decay. It takes }, based on the fission theory of alpha decay [16] have been derived and was briefly presented in refe

Paris-Sud XI, Université de

405

E-Print Network 3.0 - alpha -reductase activity Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Report for Greek Chapters Spring 2011 Summary: (Actives and New Memers) GPA GPA Rank of Members Size Rank Alpha Epsilon Pi 3.4569 3 75 8 Alpha Tau Omega... 2011 Spring...

406

E-Print Network 3.0 - alpha-gamma hot-cell facility Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

campaign, TRU waste material is be- ing removed from the Alpha Gamma Hot Cell facility in Building 212... shipments of other materials from the Alpha Gamma Hot Cell facility, ......

407

alpha 1-adrenergic receptor-mediated: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

on a background of mAChR agonists may be able to initiate alpha activity that biases TC cells, an increase in alpha power is needed to mimic the level of phasing of TC cells...

408

E-Print Network 3.0 - alpha device Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

hottest and densest. However, near the periphery of the device, very few alpha... of the fusion device must leave the device cold, with the alpha energy transferred to the set of...

409

EIS-0305: Treating Transuranic (TRU)/Alpha Low-Level at the Oak...  

Broader source: Energy.gov (indexed) [DOE]

05: Treating Transuranic (TRU)Alpha Low-Level at the Oak Ridge National Laboratory, Oak Ridge, Tennessee EIS-0305: Treating Transuranic (TRU)Alpha Low-Level at the Oak Ridge...

410

E-Print Network 3.0 - alpha thalassemic mice Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

., & Serjeant, G. R. (1983). Alpha-Thalassemia reduces the hemolytic rate in homozygous sickle-cell disease... ). Integrin alpha 4 beta 1 and glycoprotein IV (CD36) are expressed...

411

E-Print Network 3.0 - alpha centauri binary Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the south later on. Crux the Southern Cross, with Beta and Alpha Centauri... than the sun. It is the fourth brightest star in the sky after Sirius, Canopus and Alpha Centauri....

412

V-075: EMC AlphaStor Command Injection and Format String Flaws...  

Broader source: Energy.gov (indexed) [DOE]

5: EMC AlphaStor Command Injection and Format String Flaws Let Remote Users Execute Arbitrary Code V-075: EMC AlphaStor Command Injection and Format String Flaws Let Remote Users...

413

E-Print Network 3.0 - alpha particle spectroscopy Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Isotopes 59 (2003) 363-366 Comparison among alpha-particle energy losses... July 2003 Abstract In the present work, we compare the alpha-particle energy losses in air...

414

E-Print Network 3.0 - alpha particle spectra Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Isotopes 59 (2003) 363-366 Comparison among alpha-particle energy losses... July 2003 Abstract In the present work, we compare the alpha-particle energy losses in air...

415

E-Print Network 3.0 - alpha -deuterium isotope Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Isotopes 59 (2003) 363-366 Comparison among alpha-particle energy losses... July 2003 Abstract In the present work, we compare the alpha-particle energy losses in air...

416

alpha-particle emitter 211at: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Nuclear Alpha-Particle Condensates Nuclear Experiment (arXiv) Summary: The alpha-particle condensate in nuclei is...

417

E-Print Network 3.0 - alpha transitions producing Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

eral alpha transit times during... alpha particles, the wave frequency-transit frequency resonance acts similarly. Earlier work27 has... to produce a hard beta limit but a soft...

418

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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...

419

Measurement of the CKM angle alpha with the B-factories  

E-Print Network [OSTI]

B-meson decays involving b->u transitions are sensitive to the Unitarity Triangle angle alpha (or phi_2). The B-factories at SLAC and KEK have made significant progress toward the measurement of alpha in recent years. This paper summarizes the results of the B-factories' constraints on alpha.

A. Bevan

2005-12-20T23:59:59.000Z

420

Alpha channeling in rotating plasma with stationary waves Abraham J. Fetterman and Nathaniel J. Fisch  

E-Print Network [OSTI]

particle energy. Alpha channeling uses radiofrequency waves to remove alpha particles collisionlessly at low energy. It is shown that stationary magnetic fields with high n can be used for this purpose, and simulations indicate that a large fraction of the alpha energy can be converted to rotation energy. © 2010

Note: This page contains sample records for the topic "alpha excluding radon" 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

Variation of calibration constant of alpha track detectors with respect to altitude  

E-Print Network [OSTI]

awareness of their existence dates, at most, to about the turn of the century, when both X-rays and natural radioactivity were discovered. The possibility of cancer induction due to indoor radon exposure has been attracting increasing attention... include scintillation detectors, thermoluminescent dosimeters and semiconductor detectors. None of these devices can be called entirely passive(i. e. no mechanical or electrical components) and few of them can measure a long time integrated signal...

Vasudevan, Latha

1991-01-01T23:59:59.000Z

422

Alpha Solarco`s Photovoltaic Concentrator Development program  

SciTech Connect (OSTI)

This report details the work done under Sandia`s Photovoltaic Concentrator Development contract, funded jointly by Alpha Solarco and the US Department of Energy. It discusses improvements made to the cell assembly and module design of Alpha Solarco`s point-focus, high-concentration photovoltaic module. The goals of this effort were to increase the module efficiency, reduce the manufacturing cost of the cell assembly, and increase product reliability. Redesign of the secondary optical element achieved a 4 percent increase in efficiency due to better cell fill factors and offtrack performance. New, lower cost materials were identified for the secondary optical element, the optical couple between the secondary optical element and the cell, and the cell assembly electrical insulator. Manufacturing process improvements and test equipment are also discussed.

Anderson, A.; Bailor, B.; Carroll, D. [Alpha Solarco, Inc., Phoenix, AZ (United States)] [and others

1995-10-01T23:59:59.000Z

423

Simulations of Alpha Wall Load in ITER. Final report  

SciTech Connect (OSTI)

The partially DOE funded International Thermonuclear Experimental Reactor (ITER) will produce massive amounts of energetic charged alpha particles, which are imperfectly confined by a strong magnetic field. The wall of the experiment is designed to withstand an estimated wall load from these fusion alpha particles, but the accuracy of this estimate needs to be improved to avoid potentially catastrophic surprises when the experiment becomes operational. We have added a more accurate, gyro-dynamic model of particle motion to the existing drift-dynamic model in the DELTA5D simulation software used for the project. We have also added the ability to load a detailed engineering model of the wall and use it in the simulations.

Carlsson, Johan

2010-10-20T23:59:59.000Z

424

Exploring the Damped Lyman-$\\alpha$ Clouds with AXAF  

E-Print Network [OSTI]

The High Energy Transmission Grating (HETG) Spectrometer on the Advanced X-ray Astrophysics Facility (AXAF) (scheduled for launch in August, 1998) will provide a new tool for the study of absorption in the X-ray spectra of high redshift quasars due to the material along the line of sight. In this paper we try to explore the possibility of using AXAF HETG to detect resonance absorption lines from the Damped Lyman-alpha (DLA) clouds.

Fang, T; Fang, Taotao; Canizares, Claude R.

1998-01-01T23:59:59.000Z

425

Analysis of alpha backgrounds in the DEAP-1 detector  

E-Print Network [OSTI]

DEAP-1 is a 7 kg liquid argon dark matter detector used to prototype the tonne scale DEAP-3600 detector at SNOLAB.We present an analysis of the alpha particle backgrounds in DEAP-1 and isolate the radiations from various 222Rn daughters at various locations within the detector. The backgrounds will be removed by event position reconstruction and strict controls of material purity.

Kevin S. Olsen

2009-06-01T23:59:59.000Z

426

Measurement of the CKM angle phi2 (alpha)  

E-Print Network [OSTI]

We present recent measurements of the unitarity triangle angle phi2(alpha) using B -> pi pi, B -> rho rho, and B -> rho pi decays. The measurements are based on data samples collected with the Belle and BaBar detectors at the KEKB and PEP-II e+e- colliders, respectively. We also report on a new measurement of a CP-violating asymmetry in B -> a_1+ pi- decay which will allow to constrain further the angle phi2.

A. Somov

2007-08-29T23:59:59.000Z

427

Measurements of the CKM Angle Alpha at BaBar  

SciTech Connect (OSTI)

The authors present improved measurements of the branching fractions and CP-asymmetries fin the B{sup 0} {yields} {pi}{sup +}{pi}{sup -}, B{sup 0} {yields} {pi}{sup 0}{pi}{sup 0}, and B{sup +} {yields} {rho}{sup +}{rho}{sup 0} decays, which impact the determination of {alpha}. The combined branching fractions of B {yields} K{sub 1}(1270){pi} and B {yields} K{sub 1}(1400){pi} decays are measured for the first time and allow a novel determination of {alpha} in the B{sup 0} {yields} {alpha}{sub 1}(1260){sup {+-}}{pi}{sup {-+}} decay channel. These measurements are performed using the final dataset collected by the BaBar detector at the PEP-II B-factory. The primary goal of the experiments based at the B factories is to test the Cabibbo-Kobayashi-Maskawa (CKM) picture of CP violation in the standard model of electroweak interactions. This can be achieved by measuring the angles and sides of the Unitarity Triangle in a redundant way.

Stracka, Simone; /Milan U. /INFN, Milan; ,

2012-04-04T23:59:59.000Z

428

A comparison of the alpha and gamma radiolysis of CMPO  

SciTech Connect (OSTI)

The radiation chemistry of CMPO has been investigated using a combination of irradiation and analytical techniques. The {alpha}-, and {gamma}-irradiation of CMPO resulted in identical degradation rates (G-value, in {mu}mol Gy{sup -1}) for both radiation types, despite the difference in their linear energy transfer (LET). Similarly, variations in {gamma}-ray dose rates did not affect the degradation rate of CMPO. The solvent extraction behavior was different for the two radiation types, however. Gamma-irradiation resulted in steadily increasing distribution ratios for both forward and stripping extractions, with respect to increasing absorbed radiation dose. This was true for samples irradiated as a neat organic solution, or irradiated in contact with the acidic aqueous phase. In contrast, {alpha}-irradiated samples showed a rapid drop in distribution ratios for forward and stripping extractions, followed by essentially constant distribution ratios at higher absorbed doses. These differences in extraction behavior are reconciled by mass spectrometric examination of CMPO decomposition products under the different irradiation sources. Irradiation by {gamma}-rays resulted in the rupture of phosphoryl-methylene bonds with the production of phosphinic acid products. These species are expected to be complexing agents for americium that would result in higher distribution ratios. Irradiation by {alpha}-sources appeared to favor rupture of carbamoyl-methylene bonds with the production of less deleterious acetamide products.

Bruce J. Mincher; Stephen P. Mezyk; Gary Groenewold; Gracy Elias

2011-06-01T23:59:59.000Z

429

Wetting and strength issues at Al/alpha-alumina interfaces  

SciTech Connect (OSTI)

The wetting behavior and strength at aluminum/alumina interfaces has been an active subject of research. Al/alumina applications include ceramic-metal composites and several applications for electronic industries. In this paper the interface strength and microstructure of Al/alpha-alumina was investigated. We discovered that in a solid-state joining, the strength of the joint increases with increasing joining temperature. In a liquid-state joining, the strength of the joint gradually decreases due to the formation of unbonded areas. The strength, sigma sub b, is expressed by the following equation as a function of unbonded area, A: sigma sub b = 2.22 A + 143 (70 percent {le} A {le} 100 percent). The highest strength reached 400 MPa when the interface was formed at around the melting temperature of aluminum. An aluminum layer close to the interface became a single crystal when it was bonded to a sapphire. The following crystallographic orientation relationship is established: (1{bar 1}1){sub Al}//(001){sub {alpha}}-Al{sub 2} O{sub 3}, (110){sub Al}//<100>{sub {alpha}}-Al{sub 2}O{sub 3}. Amorphous alumina islands were formed at the interface. In the amorphous alumina, gamma-alumina nanocrystals grew from the sapphire, with the same orientation relationship to sapphire as above.

Saiz, Eduardo; Tomsia, Antoni P.; Suganuma, Katsuaki

2003-04-15T23:59:59.000Z

430

Radii and Binding Energies of Nuclei in the Alpha-Cluster Model  

E-Print Network [OSTI]

The alpha-cluster model is based on two assumptions that the proton-neutron pair interactions are responsible for adherence between alpha-clusters and that the NN-interaction in the alpha-clusters is isospin independent. It allows one to estimate the Coulomb energy and the short range inter-cluster bond energy in dependence on the number of clusters. The charge radii are calculated on the number of alpha-clusters too. Unlike the Weizsacker formula in this model the binding energies of alpha-clusters and excess neutrons are estimated separately. The calculated values are in a good agreement with the experimental data.

G. K. Nie

2006-03-22T23:59:59.000Z

431

A new method of alpha ray measurement using a Quadrupole Mass Spectrometer  

E-Print Network [OSTI]

We propose a new method of alpha($\\alpha$)-ray measurement that detects helium atoms with a Quadrupole Mass Spectrometer(QMS). A demonstration is undertaken with a plastic-covered $^{241}$Am $\\alpha$-emitting source to detect $\\alpha$-rays stopped in the capsule. We successfully detect helium atoms that diffuse out of the capsule by accumulating them for one to 20 hours in a closed chamber. The detected amount is found to be proportional to the accumulation time. Our method is applicable to probe $\\alpha$-emitting radioactivity in bulk material.

Y. Iwata; Y. Inoue; M. Minowa

2007-04-16T23:59:59.000Z

432

ORNL-5489 Radon and Radon Daughter  

Office of Legacy Management (LM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$0.C. 20545*.MSE Cores" _ ,' ,:.''

433

K{alpha} satellite transitions in elements with 12{<=}Z{<=}30 produced by electron incidence  

SciTech Connect (OSTI)

The emission of x-ray satellite lines in the K{alpha} region of Mg, Si, Sc, Ti, Cr, Fe, Ni, and Zn induced by electron incidence was studied by means of wavelength dispersive spectroscopy. The satellite lines studied were K{alpha}{sup '}, K{alpha}{sub 3}, K{alpha}{sub 4}, K{alpha}{sub 5}, K{alpha}{sub 6}, and two transitions denoted here as K{alpha}{sub 22} and K{alpha}{sub 12}. Energy shifts with respect to the main K{alpha}{sub 1} diagram line and transition probabilities relative to the whole K{alpha} group were determined for a number of lines through a careful spectral processing. The dependence of these parameters, as well as of the K{beta}:K{alpha} intensity ratio, on the atomic number was compared with previous experimental and theoretical determinations when available. A discussion about the different mechanisms responsible for vacancy creation involved in the production of double-ionization satellites was performed in the light of the results obtained. Finally, the behavior of the satellite intensities as a function of the incidence energy was discussed for silicon.

Limandri, Silvina P.; Carreras, Alejo C.; Trincavelli, Jorge C. [Instituto de Fisica Enrique Gaviola, Consejo Nacional de Investigaciones Cientificas y Tecnicas (Argentina); Facultad de Matematica, Astronomia y Fisica, Universidad Nacional de Cordoba, Cordoba (Argentina); Bonetto, Rita D. [Centro de Investigacion y Desarrollo en Ciencias Aplicadas Dr. Jorge Ronco (CINDECA), Consejo Nacional de Investigaciones Cientificas y Tecnicas (Argentina); Facultad de Ciencias Exactas, Facultad de Ingenieria, Universidad Nacional de La Plata, La Plata (Argentina)

2010-09-15T23:59:59.000Z

434

State-of-the-Art Predictions for C-parameter and a Determination of alpha_s  

E-Print Network [OSTI]

The C-parameter event-shape distribution for e+e- annihilation into hadrons is computed in the framework of SCET including input from fixed-order perturbation theory. We calculate all missing ingredients for achieving N3LL resummation accuracy in the cross section, which is then matched onto O(alpha_s^3) fixed-order results. Hadronization power corrections are incorporated as a convolution with a nonperturbative shape function. Wide-angle soft radiation effects introduce an O(Lambda_QCD) renormalon ambiguity in the cross section, which we cure by switching to the Rgap short-distance scheme. We also include hadron mass effects, but find their effect is rather small. Performing fits to the tail of the C-parameter distribution for many center of mass energies we find that the strong coupling constant is alpha_s(mZ) = 0.1123 +-0.0015, with chi^2/dof=0.99.

Hoang, Andre H; Mateu, Vicent; Stewart, Iain W

2015-01-01T23:59:59.000Z

435

Synthesis and evaluation of novel [alpha]-heteroaryl-phenylpropanoic acid derivatives as PPAR[alpha/gamma] dual agonists  

SciTech Connect (OSTI)

The synthesis of a new series of phenylpropanoic acid derivatives incorporating an heteroaryl group at the {alpha}-position and their evaluation for binding and activation of PPAR{alpha} and PPAR{gamma} are presented in this report. Among the new compounds, (S)-3-{l_brace}4-[3-(5-methyl-2-phenyl-oxazol-4-yl)-propyl]-phenyl{r_brace}-2-1,2,3-triazol-2-yl-propionic acid (17j), was identified as a potent human PPAR{alpha}/{gamma} dual agonist (EC{sub 50} = 0.013 and 0.061 {micro}M, respectively) with demonstrated oral bioavailability in rat and dog. 17j was shown to decrease insulin levels, plasma glucose, and triglycerides in the ZDF female rat model. In the human apolipoprotein A-1/CETP transgenic mouse model 17j produced increases in hApoA1 and HDL-C and decreases in plasma triglycerides. The increased potency for binding and activation of both PPAR subtypes observed with 17j when compared to previous analogs in this series was explained based on results derived from crystallographic and modeling studies.

Casimiro-Garcia, Agustin; Bigge, Christopher F.; Davis, Jo Ann; Padalino, Teresa; Pulaski, James; Ohren, Jeffrey F.; McConnell, Patrick; Kane, Christopher D.; Royer, Lori J.; Stevens, Kimberly A.; Auerbach, Bruce; Collard, Wendy; McGregor, Christine; Song, Kun; Pfizer

2010-09-27T23:59:59.000Z

436

CAIRNS: The Cluster And Infall Region Nearby Survey III. Environmental Dependence of H-alpha Properties of Galaxies  

E-Print Network [OSTI]

We investigate the environmental dependence of star formation in cluster virial regions and infall regions as part of CAIRNS (Cluster And Infall Region Nearby Survey), a large spectroscopic survey of the infall regions surrounding nine nearby rich clusters of galaxies. Our long-slit spectroscopy yields estimates of star formation rates in environments from cluster cores to the general large-scale structure. The fraction of galaxies with current star formation in their inner disks as traced by H-alpha emission increases with distance from the cluster and converges to the ``field'' value only at 2-3 virial radii, in agreement with other investigations. However, among galaxies with significant current star formation (EW[Ha]geq2\\AA), there is no difference in the distribution of EW[Ha] inside and outside the virial radius. This surprising result, first seen by Carter et al., suggests that (1) star formation is truncated on either very short timescales or only at moderate and high redshifts or (2) that projection effects contaminate the measurement. The number density profiles of star-forming and non-star-forming galaxies indicate that, among galaxies projected inside the virial radius, at least half of the former and 20% of the latter are ``infall interlopers,'' galaxies in the infall region but outside the virial region. The kinematics of star-forming galaxies in the infall region closely match those of absorption-dominated galaxies. This result shows that the star forming galaxies in the infall regions are not interlopers from the field and excludes one model of the backsplash scenario of galaxy transformation. Finally, we quantify systematic uncertainties in estimating the global star formation in galaxies from their inner disks.

Kenneth Rines; Margaret J. Geller; Michael J. Kurtz; Antonaldo Diaferio

2005-06-27T23:59:59.000Z

437

Organization Advisor Type Name Email Address Alpha Delta Pi Chapter Advisor Allison Thompson aburkethompson@hotmail.com  

E-Print Network [OSTI]

Organization Advisor Type Name Email Address Alpha Delta Pi Chapter Advisor Allison Thompson aburkethompson@hotmail.com Alpha Delta Pi On-Campus Advisor Kendra Stewart stewartk@cofc.edu Alpha Epsilon Pi Chapter Advisor Andrew London andrewlondon@london.com Alpha Epsilon Pi On-Campus Advisor Marsha Alterman

Young, Paul Thomas

438

DT RESULTS OF TFTR'S ALPHA COLLECTOR H. W. HERRMANN, S. J. ZWEBEN, D. S. DARROW, J. R. TIMBERLAKE  

E-Print Network [OSTI]

DT RESULTS OF TFTR'S ALPHA COLLECTOR H. W. HERRMANN, S. J. ZWEBEN, D. S. DARROW, J. R. TIMBERLAKE Physics Hamilton, Ontario, Canada ABSTRACT. An escaping alpha collector probe has been developed for TFTR the range of alphas implanted into nickel foils located within the alpha collector. Exposedsamples have been

439

Measurement of the CKM Angle Alpha at BaBar  

SciTech Connect (OSTI)

We present BABAR experiment studies to measure the CKM angle {alpha} of the Unitarity Triangle. The measurements are based on the B meson decays into the two-body state ({pi}{pi}), the quasi two-body state ({rho}{rho}), and the three-body state ({pi}{sup +}{pi}{sup -}{pi}{sup 0}). The results are obtained from data samples of about 230 million {Upsilon}(4S) {yields} B{bar B} decays collected between 1999 and 2004 with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC.

Yeche, C.; /Saclay

2006-04-14T23:59:59.000Z

440

Magnetic interaction in oxygenated alpha Fe-phthalocyanines  

SciTech Connect (OSTI)

Alpha iron phthalocyanines (?-FePc) oxygenated at low temperatures were investigated with the help of {sup 57}Fe Mssbauer spectroscopy, magnetization measurements (SQUID) and X-ray diffractometry (XRD). Mssbauer spectroscopy revealed that upon oxygenation of ?-FePc, new species were formed which could be associated with Fe{sup III}Pc oxygen adducts. Unexpectedly, magnetically split spectrum of oxygenated ?-FePc was observed below 20 K. In-field Mssbauer spectra in a 5 T external magnetic field at 5K and magnetization measurements indicate antiferromagnetic coupling in oxygenated ?-FePc.

Kuzmann, Ern?, E-mail: kuzmann@caesar.elte.hu; Homonnay, Zoltn; Horvth, Attila [Institute of Chemistry, Etvs Lornd University, P.O. Box 32, 1512 Budapest (Hungary); Pechousek, Jiri; Cuda, Jan; Machala, Libor; Zoppellaro, Giorgio; Zboril, Radek [Regional Centre of Advanced Technologies and Materials, Departments of Experimental Physics and Physical Chemistry, Faculty of Science Palacky University, 17. Listopadu 1192/12, 771 46 Olomouc (Czech Republic); Yin, Houping; Wei, Yen [Department of Chemistry, Drexel University, Philadelphia, PA 19104 (United States); Klencsr, Zoltn [Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, 1117 (Hungary); Kubuki, Shiro [Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachi-Oji, Tokyo 192-0397 (Japan); Nath, Amar [Department of Chemistry, University of North Carolina, Asheville, NC 28804 (United States)

2014-10-27T23:59:59.000Z

Note: This page contains sample records for the topic "alpha excluding radon" 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

Evidence for Solar-like Oscillations in Arcturus (Alpha Boo)  

E-Print Network [OSTI]

Observations of the red giant Arcturus (Alpha Boo) obtained with the star tracker on the Wide Field Infrared Explorer (WIRE) satellite during a baseline of 19 successive days in 2000 July-August are analysed. The power spectrum has a significant excess of power at low-frequencies. The highest peak is at about 4.1 micro-Hz, which is in agreement with the ground-based radial velocity and photometry study of Belmonte et al. (1990a; 1990b). The variability of Arcturus can be explained by sound waves, but it is not clear whether these are coherent p-mode oscillations.

Alon Retter; Timothy R. Bedding; Derek Buzasi; Hans Kjeldsen

2002-08-28T23:59:59.000Z

442

A comparative study of DNA polymerase alpha isolation  

E-Print Network [OSTI]

) Mechanistic Studies of DNA Re lication and Genetic Recombination, Alberts, B. , ed. Academic Press, New York, 55 53 58. Korn, D. , Fisher, P. A, , Battey, J. , and Wang, T. S. F. (1979) Cold S rin Harbor S m . Quant. Biol. 43, 613 59. Fisher, P. A...A COMPARATIVE STUDY OF DNA POLYMERASE ALPHA ISOLATION A Thesis by ZINA CERNOSEK Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE May 1987 Major Subject...

Cernosek, Zina

1987-01-01T23:59:59.000Z

443

Property:Iso3166Alpha2 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating Solar Powerstories onFocusOskiPhilipspresentsGeothermalArea JumpActiveIso3166Alpha2

444

The broadening of Lyman-alpha forest absorption lines  

E-Print Network [OSTI]

We provide an analytical description of the line broadening of HI absorbers in the Lyman-alpha forest resulting from Doppler broadening and Jeans smoothing. We demonstrate that our relation captures the dependence of the line-width on column density for narrow lines in z~3 mock spectra remarkably well. Broad lines at a given column density arise when the underlying density structure is more complex, and such clustering is not captured by our model. Our understanding of the line broadening opens the way to a new method to characterise the thermal state of the intergalactic medium and to determine the sizes of the absorbing structures.

Garzilli, Antonella; Schaye, Joop

2015-01-01T23:59:59.000Z

445

Lyman Alpha Flux Power Spectrum and Its Covariance  

E-Print Network [OSTI]

We analyze the flux power spectrum and its covariance using simulated Lyman alpha forests. We find that pseudo-hydro techniques are good approximations of hydrodynamical simulations at high redshift. However, the pseudo-hydro techniques fail at low redshift because they are insufficient for characterizing some components of the low-redshift intergalactic medium, notably the warm-hot intergalactic medium. Hence, to use the low-redshift Lyman alpha flux power spectrum to constrain cosmology, one would need realistic hydrodynamical simulations. By comparing one-dimensional mass statistics with flux statistics, we show that the nonlinear transform between density and flux quenches the fluctuations so that the flux power spectrum is much less sensitive to cosmological parameters than the one-dimensional mass power spectrum. The covariance of the flux power spectrum is nearly Gaussian. As such, the uncertainties of the underlying mass power spectrum could still be large, even though the flux power spectrum can be precisely determined from a small number of lines of sight.

Hu Zhan; Romeel Dave; Daniel Eisenstein; Neal Katz

2005-08-10T23:59:59.000Z

446

The Lyman Alpha Forest within The Cosmic Web  

E-Print Network [OSTI]

Observations indicate galaxies are distributed in a filament-dominated web-like structure; classic examples are the Coma and Perseus-Pisces superclusters. Numerical experiments at high and low redshift of viable structure formation theories also show filament-dominance; in particular, the gasdynamical simulations of Lyman alpha clouds at redshifts 2-6 that we concentrate on here. We understand why this is so in terms of rare events (peak patches) in the medium and the web pattern of filaments that bridge the gaps between the peaks along directions defined by their (oriented) tidal fields. We present an overview of these ideas and their practical application in crafting high resolution well-designed simulations. We show the utility of this by taking a highly filamentary subvolume found in a galactic-scale simulation, compressing its important large scale features onto a handful of numbers defining galactic-scale peak-patch constraints, which are then used to construct constrained initial conditions for a higher resolution simulation appropriate for study of the Lyman alpha forest.

J. Richard Bond; James W. Wadsley

1997-03-20T23:59:59.000Z

447

The impact of alpha/Fe enhanced stellar evolutionary tracks on the ages of elliptical galaxies  

E-Print Network [OSTI]

We complement our study of alpha/Fe enhanced stellar population models of Lick absorption indices (Thomas et al. 2003) by comparing two sets of alpha/Fe enhanced models. In both models the impact on Lick indices due to alpha/Fe enhancement is accounted for through a modification of the stellar absorption line-strengths using the response functions of Tripicco & Bell (1995). One set of models, however, uses solar-scaled, the other alpha/Fe enhanced stellar evolutionary tracks. Since the alpha/Fe enhanced tracks are hotter than the solar-scaled ones (Salasnich et al. 2000), the correspondent stellar population models have slightly weaker metallic indices (i.e. Mgb, etc.) and stronger Balmer line indices (Hbeta) (Maraston et al 2003). Here we explore quantitatively the impact of this effect on the alpha/Fe ratios, metallicities and ages that are derived for elliptical galaxies. We find that the modest decrease of the metallic indices Mgb and balance each other, such that fully consistent alpha/Fe ratios are derived for stellar systems using alpha/Fe enhanced models with either solar-scaled or alpha/Fe enhanced stellar tracks. The decrease of the metallic indices and the increase of Hbeta conspire in a way that also consistent metallicities are obtained. The derived ages, instead, are significantly different. The inclusion of alpha/Fe enhanced stellar tracks leads to the derivation of ages as high as 30 Gyr for elliptical galaxies. For the same objects, ages not older than 15 Gyr are obtained, if alpha/Fe enhanced models using solar-scaled tracks are adopted. This may indicate that current stellar evolutionary models overestimate the bluing of stellar evolutionary tracks due to alpha/Fe enhanced chemical mixtures at super-solar metallicities.

Daniel Thomas; Claudia Maraston

2003-02-04T23:59:59.000Z

448

E-Print Network 3.0 - additional collateral alpha-decay Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

for Physics... semiempirical relationship is derived on the grounds of the fission theory of alpha decay. It takes... of the double magic nucleus 100Sn was studied 7....

449

E-Print Network 3.0 - alpha os reaction Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

for Physics... semiempirical relationship is derived on the grounds of the fission theory of alpha decay. It takes Source: Ecole Polytechnique, Centre de mathmatiques...

450

alpha beta-unsaturated carbonyl: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

More than twenty different types of process, from lattice QCD studies to the highest energy colliders, can be used to measure alphas accurately. The most precise determinations...

451

E-Print Network 3.0 - alpha particles due Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to mirror machines can benefit this concept by efficiently redirecting alpha particle energy... -transverse wave propagation. As a result, modes suitable for ... Source:...

452

E-Print Network 3.0 - alpha coding sequence Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

will generate conservative Alpha code sequences for unaligned memory access. If the profile does not indicate... Pentium or a 200-MHz Pentium Pro when executing translated...

453

E-Print Network 3.0 - alpha angle measurement Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

with the pellet charge exchange diagnostic. PACS... measurements with the TRANSP alpha profile ... Source: Princeton Plasma Physics Laboratory, Theory Department Collection: Plasma...

454

E-Print Network 3.0 - alpha -branching ratios Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Laboratory Collection: Plasma Physics and Fusion 96 Fraternity & Sorority Life Awards Spring 2009 & Fall 2009 Summary: Alpha Outstanding Risk Management Program : ARK Week...

455

E-Print Network 3.0 - alpha -particle induced Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Computer Technologies and Information Sciences 48 Fraternity & Sorority Life Awards Spring 2009 & Fall 2009 Summary: Alpha Outstanding Risk Management Program : ARK Week...

456

E-Print Network 3.0 - alpha 2-macroglobulin implications Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

receptor-associated protein. Proc. Natl... Tigue, K., Battey, J.F., and Argraves, W.S. (1991). Primary struc- ture of alpha 2-macroglobulin receptor... residues on...

457

E-Print Network 3.0 - alpha molecular orbital Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

expected in AT regime (White) For 10% power loss, up to 4 MW alpha power to wall Note: Neutron wall Source: Fusiongnition Research Experiment (FIRE) Collection: Plasma...

458

alpha-melanocyte stimulating hormone: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Association of habituation with endogenous alpha-melanocyte-stimulating hormone in the brain of the toad, Bufo cognatus. Open Access Theses and Dissertations Summary: ??Several...

459

E-Print Network 3.0 - alpha-particle emission spectrum Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Polytechnique, Centre de mathmatiques Collection: Mathematics 2 Radiation Protection Dosimetry Vol. 99, Nos 14, pp. 227232 (2002) Summary: alpha particles through their...

460

E-Print Network 3.0 - alpha class glutathione Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the Detoxification of 2-Phenylpropenal, a Reactive Summary: of the genotoxic aldehyde acrolein by human glutathione transferases of classes alpha, pi, and mu. Mol. Pharmacol......

Note: This page contains sample records for the topic "alpha excluding radon" 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

E-Print Network 3.0 - alpha spectrometers Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Alpha-particle ... Source: Fusiongnition Research Experiment (FIRE) Collection: Plasma Physics and Fusion 6 Diagnostics for FIRE Kenneth M. Young Summary: Visible...

462

E-Print Network 3.0 - alpha magnetic spectrometer Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Halpha TV X-ray crystal... alpha-particles? K. M. Young 5200 12;Provisional List of Diagnostics (1) ... Source: Fusiongnition Research Experiment (FIRE) Collection: Plasma...

463

E-Print Network 3.0 - alpha particle induced Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AT Burning Plasmas Summary: Discussion of Alpha Particle Physics Issues for AT Burning Plasmas R. Nazikian Princeton Plasma... 1-3, 2000 (PPPL, Princeton, NJ) 12;Single...

464

E-Print Network 3.0 - alpha particle orbits Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AT Burning Plasmas Summary: Discussion of Alpha Particle Physics Issues for AT Burning Plasmas R. Nazikian Princeton Plasma... 1-3, 2000 (PPPL, Princeton, NJ) 12;Single...

465

E-Print Network 3.0 - alpha-melanocyte-stimulating hormone protects...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

protects Search Powered by Explorit Topic List Advanced Search Sample search results for: alpha-melanocyte-stimulating hormone protects Page: << < 1 2 3 4 5 > >> 1 2 Utilize...

466

E-Print Network 3.0 - alpha7-nicotinic acetylcholine receptor...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

lpyridazine-3-yloctahydropyrrolo3,4-c 11CA-582941 Summary: .B. Mikkelsen J.D. Cognitive improvement by activation of alpha7 nicotinic acetylcholine receptors: from...

467

E-Print Network 3.0 - alpha 1-microglobulin destroys Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

remained aggressive but ended up immobilized by low... behaviors typical of the alpha rank. In parallel, the cuticular profile of the treated ... Source: Danchin, Etienne -...

468

Analysis of alpha-induced reactions on $^{151}$Eu below the Coulomb barrier  

E-Print Network [OSTI]

Novel measurements of $(\\alpha,\\gamma)$ and $(\\alpha$,n) reaction cross sections on the target nucleus $^{151}$Eu, close to the reaction thresholds, support the setting up of recent parameters of the $\\alpha$-particle optical model potential below the Coulomb barrier. A better understanding of the $\\alpha$-particle optical potential at these energies leads to a statistical model analysis of additional partial cross sections that were formerly measured but not considered within the model analysis. On this basis we have tentatively assigned a modified $J^{\\pi}$=9$^-$ spin and parity to the 22.7-h isomer in $^{154}$Tb.

V. Avrigeanu; M. Avrigeanu

2010-12-05T23:59:59.000Z

469

Recovery Cleanup Project at Y-12 Leaves Alpha 5 with an Empty...  

National Nuclear Security Administration (NNSA)

Cleanup Project at Y-12 Leaves Alpha 5 with an Empty Feeling | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People Mission Managing the Stockpile...

470

E-Print Network 3.0 - alpha synuclein induced Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

synuclein induced Search Powered by Explorit Topic List Advanced Search Sample search results for: alpha synuclein induced Page: << < 1 2 3 4 5 > >> 1 The Aggregation and...

471

E-Print Network 3.0 - alpha induced reactions Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

production balances the various energy losses and the fusion reaction is self-sustaining. The product ions... (alpha particles in the case of a deuterium-tritium plasma)...

472

E-Print Network 3.0 - arginyltransferase regulates alpha Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

queenless ant... of the unmated nestmates led to the behavioural differentiation of a top-ranking worker (alpha'), ... Source: Danchin, Etienne - Laboratoire Evolution et...

473

E-Print Network 3.0 - alpha activity indicator Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Neuroscience, Brandeis University Collection: Biology and Medicine 29 Relations between PET-derived measures of thalamic glucose metabolism and EEG alpha power Summary: has been...

474

E-Print Network 3.0 - alpha-particle inelastic scattering Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

with matter in several ways. A large, massive, charged alpha particle... and inelastic scattering of the neutron means that the atomic nucleus remains unexcited (in ground...

475

E-Print Network 3.0 - alpha emitters ii Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

exceeded... toxicity alpha ... Source: Yucca Mountain Project, US EPA Collection: Environmental Sciences and Ecology 22 Fabrication and Characterization of Porous Metal Emitters...

476

E-Print Network 3.0 - alpha satellite subset Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Astronautics, Massachusetts Institute of Technology (MIT) Collection: Engineering 40 WIND Measurements of Proton and Alpha Particle Flow and Number Density J. T. Steinberg...

477

E-Print Network 3.0 - ancestral alpha satellites Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

College London Collection: Environmental Sciences and Ecology ; Biology and Medicine 30 WIND Measurements of Proton and Alpha Particle Flow and Number Density J. T. Steinberg...

478

E-Print Network 3.0 - alpha-voltaic power source Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Albuquerque, New Mexico, January 2000 Miniaturized Radioisotope Solid State Power Sources Summary: for an alpha-voltaic or a hybrid thermoelectricalpha-voltaic power...

479

E-Print Network 3.0 - alpha induced nuclear Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of Engineering Nuclear Engineering and Radiological Sciences... Different types of radiation (alpha, beta, gammas, and neutrons) have different ways in which they deliver......

480

E-Print Network 3.0 - alpha-helical protein backbones Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

features (alpha helices hydrophobic or amphipathic) 12;Hydropathy plots... 12;From micro to nano 12;Ribosome makes proteins 12;From ribosome to 3D- Protein ... Source:...

Note: This page contains sample records for the topic "alpha excluding radon" 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

E-Print Network 3.0 - alpha detection system Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Methods based on the fluctuations in the number of detected neutrons in a subcritical system... (Rossi-alpha) methods, are used to determine the subcritical reactivity...

482

E-Print Network 3.0 - alpha sources Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Imre Pzsit and Andreas Enqvist... (Rossi-alpha) methods, are used to determine the subcritical reactivity of the system. Although Source: Pzsit, Imre - Department of Reactor...

483

E-Print Network 3.0 - alpha compact lithotriptor Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

or the correlation... (Rossi-alpha) methods, are used to determine the subcritical reactivity of the system. Although Source: Pzsit, Imre - Department of Reactor...

484

E-Print Network 3.0 - alpha generate biologically Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Alpha Phi Omega National Service Fraternity 12;t Source: Ragsdell, Kenneth M. - Design Engineering Center, University of Missouri-Rolla Collection: Engineering 13 THE...

485

E-Print Network 3.0 - alpha particle degradation Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

24 James W. Van Dam US Burning Plasma Organization Summary: dominantly self-heated by fusion products (e.g., alpha particles) from thermonuclear reactions in the plasma......

486

E-Print Network 3.0 - alpha particle destabilization Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

26 James W. Van Dam US Burning Plasma Organization Summary: dominantly self-heated by fusion products (e.g., alpha particles) from thermonuclear reactions in the plasma......

487

E-Print Network 3.0 - alpha-recoil damaged minerals Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: ... 7.1 7.1.2 Alpha-Recoil and Uranium Series Disequilibrium... (VI) in the Hanford subsurface is retarded by both...

488

E-Print Network 3.0 - alpha -fetoprotein controls Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

control the interpolation process. The first maps... time interval. The way the alpha value is generated is ... Source: Hill, Gary - School of Applied Sciences, University of...

489

Comparison of MCNP6 and experimental results for neutron counts, Rossi-{alpha}, and Feynman-{alpha} distributions  

SciTech Connect (OSTI)

MCNP6, the general-purpose Monte Carlo N-Particle code, has the capability to perform time-dependent calculations by tracking the time interval between successive events of the neutron random walk. In fixed-source calculations for a subcritical assembly, the zero time value is assigned at the moment the neutron is emitted by the external neutron source. The PTRAC and F8 cards of MCNP allow to tally the time when a neutron is captured by {sup 3}He(n, p) reactions in the neutron detector. From this information, it is possible to build three different time distributions: neutron counts, Rossi-{alpha}, and Feynman-{alpha}. The neutron counts time distribution represents the number of neutrons captured as a function of time. The Rossi-a distribution represents the number of neutron pairs captured as a function of the time interval between two capture events. The Feynman-a distribution represents the variance-to-mean ratio, minus one, of the neutron counts array as a function of a fixed time interval. The MCNP6 results for these three time distributions have been compared with the experimental data of the YALINA Thermal facility and have been found to be in quite good agreement. (authors)

Talamo, A.; Gohar, Y. [Argonne National Laboratory, 9700 S. Cass Ave., Lemont, IL 60439 (United States); Sadovich, S.; Kiyavitskaya, H.; Bournos, V.; Fokov, Y.; Routkovskaya, C. [Joint Institute for Power and Nuclear Research-Sosny, 99 Academician A.K. Krasin Str., Minsk 220109 (Belarus)

2013-07-01T23:59:59.000Z

490

Estrogen-related receptor {alpha} is essential for the expression of antioxidant protection genes and mitochondrial function  

SciTech Connect (OSTI)

Estrogen-related receptor {alpha} (ERR{alpha}) is an important mediator of mitochondrial biogenesis and function. To investigate the transcriptional network controlling these phenomena, we investigated mitochondrial gene expression in embryonic fibroblasts isolated from ERR{alpha} null mice. Peroxisome proliferator-activated receptor {gamma} coactivator-1{alpha} (PGC-1{alpha}) stimulated mitochondrial gene expression program in control cells, but not in the ERR{alpha} null cells. Interestingly, the induction of levels of mitochondrial oxidative stress protection genes in response to increased PGC-1{alpha} levels was dependent on ERR{alpha}. Furthermore, we found that the PGC-1{alpha}-mediated induction of estrogen-related receptor {gamma} and nuclear respiratory factor 2 (NRF-2), was dependent on the presence of ERR{alpha}. Basal levels of NRF-2 were decreased in the absence of ERR{alpha}. The absence of ERR{alpha} resulted in a decrease in citrate synthase enzyme activity in response to PGC-1{alpha} overexpression. Our results indicate an essential role for ERR{alpha} as a key regulator of oxidative metabolism.

Rangwala, Shamina M. [Diabetes and Metabolism Disease Area, Novartis Institutes of BioMedical Research Institutes, 100 Technology Square, Cambridge, MA 02139 (United States)]. E-mail: shamina.rangwala@novartis.com; Li, Xiaoyan [Diabetes and Metabolism Disease Area, Novartis Institutes of BioMedical Research Institutes, 100 Technology Square, Cambridge, MA 02139 (United States); Lindsley, Loren [Diabetes and Metabolism Disease Area, Novartis Institutes of BioMedical Research Institutes, 100 Technology Square, Cambridge, MA 02139 (United States); Wang, Xiaomei [Diabetes and Metabolism Disease Area, Novartis Institutes of BioMedical Research Institutes, 100 Technology Square, Cambridge, MA 02139 (United States); Shaughnessy, Stacey [Diabetes and Metabolism Disease Area, Novartis Institutes of BioMedical Research Institutes, 100 Technology Square, Cambridge, MA 02139 (United States); Daniels, Thomas G. [Diabetes and Metabolism Disease Area, Novartis Institutes of BioMedical Research Institutes, 100 Technology Square, Cambridge, MA 02139 (United States); Szustakowski, Joseph [Genome and Proteome Sciences, Novartis Institutes of BioMedical Research Institutes, 500 Technology Square, Cambridge, MA 02139 (United States); Nirmala, N.R. [Genome and Proteome Sciences, Novartis Institutes of BioMedical Research Institutes, 500 Technology Square, Cambridge, MA 02139 (United States); Wu, Zhidan [Diabetes and Metabolism Disease Area, Novartis Institutes of BioMedical Research Institutes, 100 Technology Square, Cambridge, MA 02139 (United States); Stevenson, Susan C. [Diabetes and Metabolism Disease Area, Novartis Institutes of BioMedical Research Institutes, 100 Technology Square, Cambridge, MA 02139 (United States)

2007-05-25T23:59:59.000Z

491

Properties of planar Nb/{alpha}-Si/Nb Josephson junctions with various degrees of doping of the {alpha}-Si layer  

SciTech Connect (OSTI)

The properties of Nb/{alpha}-Si/Nb planar Josephson junctions with various degrees of doping of the amorphous silicon layer are experimentally studied. Tungsten is used as a doping impurity. The properties of the Josephson junctions are shown to change substantially when the degree of doping of the {alpha}-Si layer changes: a current transport mechanism and the shape of the current-voltage characteristic of the junctions change. Josephson junctions with SNS-type conduction are formed in the case of a fully degenerate {alpha}-Si layer. The properties of such junctions are described by a classical resistive model. Josephson junctions with a resonance mechanism of current transport through impurity centers are formed at a lower degree of doping of the {alpha}-Si layer. The high-frequency properties of such junctions are shown to change. The experimental results demonstrate that these junctions are close to SINIS-type Josephson junctions.

Gudkov, A. L., E-mail: gudkov@niifp.ru [Lukin Scientific Research Institute of Physical Problems, ZAO Kompelst (Russian Federation); Kupriyanov, M. Yu. [Moscow State University, Skobeltsyn Institute of Nuclear Physics (Russian Federation); Samus', A. N. [Lukin Scientific Research Institute of Physical Problems, ZAO Kompelst (Russian Federation)

2012-05-15T23:59:59.000Z

492

Superdeformation and alpha - cluster structure in 35Cl  

E-Print Network [OSTI]

A superdeformed (SD) band has been identified in a non - alpha - conjugate nucleus 35Cl. It crosses the negative parity ground band above 11/2- and becomes the yrast at 15/2-. Lifetimes of all relevant states have been measured to follow the evolution of collectivity. Enhanced B(E2), B(E1) values as well as energetics provide evidences for superdeformation and existence of parity doublet cluster structure in an odd-A nucleus for the first time in A = 40 region. Large scale shell model calculations assign (sd)16(pf)3 as the origin of these states. Calculated spectroscopic factors correlate the SD states in 35Cl to those in 36Ar.

Abhijit Bisoi; M. Saha Sarkar; S. Sarkar; S. Ray; M. Roy Basu; Debasmita Kanjilal; Somnath Nag; K. Selva Kumar; A. Goswami; N. Madhavan; S. Muralithar; R. K. Bhowmik

2013-05-19T23:59:59.000Z

493

The Cosmological Evolution of Quasar Damped Lyman-Alpha Systems  

E-Print Network [OSTI]

We present results from an efficient, non-traditional survey to discover damped Lyman-alpha (DLA) absorption-line systems with neutral hydrogen column densities N(HI)>2x10^{20} atoms cm^{-2} and redshifts z<1.65. Contrary to previous studies at higher redshift that showed a decrease in the cosmological mass density of neutral gas in DLA absorbers, Omega_{DLA}, with time, our results indicate that Omega_{DLA} is consistent with remaining constant from redshifts z \\approx 4 to z \\approx 0.5. There is no evidence that Omega_{DLA} is approaching the value at z=0. Other interesting results from the survey are also presented.

Sandhya Rao

2000-09-06T23:59:59.000Z

494

QCD analyses and determinations of $\\alpha_{s}$ in $e^{+}e^{-}$ annihilation at energies between 35 and 189 GeV  

E-Print Network [OSTI]

We employ data taken by the JADE and OPAL experiments for an integrated QCD study in hadronic e+e- annihilations at c.m.s. energies ranging from 35 GeV through 189 GeV. The study is based on jet-multiplicity related observables. The observables are obtained to high jet resolution scales with the JADE, Durham, Cambridge and cone jet finders, and compared with the predictions of various QCD and Monte Carlo models. The strong coupling strength, alpha_s, is determined at each energy by fits of O(alpha_s^2) calculations, as well as matched O(alpha_s^2) and NLLA predictions, to the data. Matching schemes are compared, and the dependence of the results on the choice of the renormalization scale is investigated. The combination of the results using matched predictions gives alpha_s(MZ)=0.1187+{0.0034}-{0.0019}. The strong coupling is also obtained, at lower precision, from O(alpha_s^2) fits of the c.m.s. energy evolution of some of the observables. A qualitative comparison is made between the data and a recent MLLA p...

Pfeifenschneider, P; Movilla-Fernndez, P A; Abbiendi, G; Ackerstaff, K; kesson, P F; Alexander, Gideon; Allison, J; Anderson, K J; Arcelli, S; Asai, S; Ashby, S F; Axen, D A; Azuelos, Georges; Bailey, I; Ball, A H; Barberio, E; Barlow, R J; Batley, J Richard; Baumann, S; Behnke, T; Bell, K W; Bella, G; Bellerive, A; Bentvelsen, Stanislaus Cornelius Maria; Bethke, Siegfried; Biguzzi, A; Bloodworth, Ian J; Bock, P; Bhme, J; Boeriu, O; Bonacorsi, D; Boutemeur, M; Braibant, S; Bright-Thomas, P G; Brigliadori, L; Brown, R M; Burckhart, Helfried J; Cammin, J; Capiluppi, P; Carnegie, R K; Carter, A A; Carter, J R; Chang, C Y; Charlton, D G; Chrisman, D; Ciocca, C; Clarke, P E L; Clay, E; Cohen, I; Cooke, O C; Couchman, J; Couyoumtzelis, C; Coxe, R L; Cuffiani, M; Dado, S; Dallavalle, G M; Dallison, S; Davis, R; de Roeck, A; Dervan, P J; Desch, Klaus; Dienes, B; Dixit, M S; Donkers, M; Dubbert, J; Duchovni, E; Duckeck, G; Duerdoth, I P; Estabrooks, P G; Etzion, E; Fabbri, Franco Luigi; Fanfani, A; Fanti, M; Faust, A A; Feld, L; Ferrari, P; Fiedler, F; Fierro, M; Fleck, I; Frey, A; Frtjes, A; Futyan, D I; Gagnon, P; Gary, J W; Gaycken, G; Geich-Gimbel, C; Giacomelli, G; Giacomelli, P; Gingrich, D M; Glenzinski, D A; Goldberg, J; Gorn, W; Grandi, C; Graham, K; Gross, E; Grunhaus, Jacob; Gruw, M; Gnther, P O; Hajdu, C; Hanson, G G; Hansroul, M; Hapke, M; Harder, K; Harel, A; Hargrove, C K; Harin-Dirac, M; Hauke, A; Hauschild, M; Hawkes, C M; Hawkings, R; Hemingway, Richard J; Hensel, C; Herten, G; Heuer, R D; Hildreth, M D; Hill, J C; Hobson, P R; Hcker, Andreas; Hoffman, K; Homer, R James; Honma, A K; Horvth, D; Hossain, K R; Howard, R; Hntemeyer, P; Igo-Kemenes, P; Imrie, D C; Ishii, K; Jacob, F R; Jawahery, A; Jeremie, H; Jimack, Martin Paul; Jones, C R; Jovanovic, P; Junk, T R; Kanaya, N; Kanzaki, J I; Karapetian, G V; Karlen, D A; Kartvelishvili, V G; Kawagoe, K; Kawamoto, T; Kayal, P I; Keeler, Richard K; Kellogg, R G; Kennedy, B W; Kim, D H; Klier, A; Kobayashi, T; Kobel, M; Kokott, T P; Kolrep, M; Komamiya, S; Kowalewski, R V; Kress, T; Krieger, P; Von Krogh, J; Khl, T; Kupper, M; Kyberd, P; Lafferty, G D; Landsman, Hagar Yal; Lanske, D; Lawson, I; Layter, J G; Leins, A; Lellouch, Daniel; Letts, J; Levinson, L; Liebisch, R; Lillich, J; List, B; Littlewood, C; Lloyd, A W; Lloyd, S L; Loebinger, F K; Long, G D; Losty, Michael J; L, J; Ludwig, J; Macchiolo, A; MacPherson, A L; Mader, W F; Mannelli, M; Marcellini, S; Marchant, T E; Martin, A J; Martin, J P; Martnez, G; Mashimo, T; Mttig, P; McDonald, W J; McKenna, J A; McMahon, T J; McPherson, R A; Meijers, F; Mndez-Lorenzo, P; Merritt, F S; Mes, H; Meyer, I; Michelini, Aldo; Mihara, S; Mikenberg, G; Miller, D J; Mohr, W; Montanari, A; Mori, T; Nagai, K; Nakamura, I; Neal, H A; Nisius, R; O'Neale, S W; Oakham, F G; Odorici, F; gren, H O; Okpara, A N; Oreglia, M J; Orito, S; Psztor, G; Pater, J R; Patrick, G N; Patt, J; Prez-Ochoa, R; Pfeifenschneider, P; Pilcher, J E; Pinfold, James L; Plane, D E; Poli, B; Polok, J; Przybycien, M B; Quadt, A; Rembser, C; Rick, Hartmut; Robins, S A; Rodning, N L; Roney, J M; Rosati, S; Roscoe, K; Rossi, A M; Rozen, Y; Runge, K; Runlfsson, O; Rust, D R; Sachs, K; Saeki, T; Sahr, O; Sang, W M; Sarkisyan-Grinbaum, E; Sbarra, C; Schaile, A D; Schaile, O; Scharff-Hansen, P; Schieck, J; Schmitt, S; Schning, A; Schrder, M; Schumacher, M; Schwick, C; Scott, W G; Seuster, R; Shears, T G; Shen, B C; Shepherd-Themistocleous, C H; Sherwood, P; Siroli, G P; Skuja, A; Smith, A M; Snow, G A; Sobie, Randall J; Sldner-Rembold, S; Spagnolo, S; Sproston, M; Stahl, A; Stephens, K; Stoll, K; Strom, D; Strhmer, R; Surrow, B; Talbot, S D; Tarem, S; Taylor, R J; Teuscher, R; Thiergen, M; Thomas, J; Thomson, M A; Torrence, E; Towers, S; Trefzger, T M; Trigger, I; Trcsnyi, Z L; Tsur, E; Turner-Watson, M F; Ueda, I; Van Kooten, R; Vannerem, P; Verzocchi, M; Voss, H; Waller, D; Ward, C P; Ward, D R; Watkins, P M; Watson, A T; Watson, N K; Wells, P S; Wengler, T; Wermes, N; Wetterling, D; White, J S; Wilson, G W; Wilson, J A; Wyatt, T R; Yamashita, S; Zacek, V; Zer-Zion, D; Jade, The

2000-01-01T23:59:59.000Z

495

Reconciling steady-state Kalman and alpha-beta filter design  

E-Print Network [OSTI]

The deterministic design of the alpha-beta filter and the stochastic design of its Kalman counterpart are placed on a common basis. The first step is to find the continuous-time filter architecture which transforms into the alpha-beta discrete...

Painter, John H.; Kerstetter, D.; Jowers, S.

496

PPPL-2878 UC-426 February 1993 Tritium Diagnostics by Balmer-alpha Emission  

E-Print Network [OSTI]

PPPL-2878 UC-426 February 1993 Tritium Diagnostics by Balmer-alpha Emission C H Skinner, A T Ramsey emission from tritium in a plasma may be distinguished from deuterium emission by a small isotope shift. A diagnostic system to measure tritium Balmer-alpha emission from the plasma edge has been installed on TFTR

497

Photon/electron-rejecting alpha liquid scintillation (PERALS{reg_sign}) spectrometry: A review  

SciTech Connect (OSTI)

Alpha spectrometry by liquid scintillation has become a practical reality within the last three to four years. The present ability to identify and reject virtually all pulses from beta and gamma radiation (<99.95) and to obtain useful (5%) resolution of alpha energies allows alpha liquid-scintillation spectrometry to be viewed in a different perspective than formerly. Instrumentation and reagents now are available so that radiochemical laboratories can consider alpha liquid scintillation as a useful addition to their present methods of alpha counting and spectrometry. Coupling this instrumentation with extractive scintillators that have efficient light output and high liquid-liquid extraction selectivity for a given radionuclide produces a system that allows both great sensitivity and high accuracy in alpha counting. Thus the method is applicable to both the detection of low levels of activity in the environment (0.001 cpm) and to the accurate determination of the amount of an alpha-emitting radionuclide for accountability purposes (accuracy limited only by sampling errors). This article attempts to survey the known applications of alpha liquid scintillation and preview some additional applications that are just now developing.

McDowell, J.W.

1992-12-31T23:59:59.000Z

498

Technical NoteFEASIBILITY STUDIES OF ALPHA-PARTICLE CHANNELING IN MIRROR MACHINES  

E-Print Network [OSTI]

Technical NoteFEASIBILITY STUDIES OF ALPHA-PARTICLE CHANNELING IN MIRROR MACHINES A. I. ZHMOGINOV such as mirror machines can benefit this concept by efficiently redirecting a-particle energy to fuel ion heating designs and for proof-of-principle experiments. KEYWORDS: alpha channeling, mirror machines, ray tracing

499

Feasibility studies of colorless LR 115 SSNTD for alpha-particle radiobiological experiments  

E-Print Network [OSTI]

microscope. 2006 Elsevier B.V. All rights reserved. PACS: 29.40; 23.60 Keywords: Solid-state nuclear track experiments involve irradiating cells with alpha-particles and require accurate positions where the alpha, it is natural that solid-state nuclear track detectors (SSNTDs) were used as substrates for cell cultures

Yu, K.N.

500

Thermal Performance of Poly Alpha Olefin Nanofluid with Spherical and Non-spherical Nanoparticles  

E-Print Network [OSTI]

. Nanoparticles can be metallic or non-metallic and also can have different shapes. In this study, Poly-Alpha-Olefin (PAO) has been used as a base fluid with Alumina (Al2O3) nanoparticles. Poly-Alpha-Olefin is commonly used for engine lubrication in military...

Park, Chan Hyun

2012-07-16T23:59:59.000Z