Sample records for airborne radon decay

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

    E-Print Network [OSTI]

    Yu, K.N.

    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

  2. DESIGN AND PERFORMANCE OF A PASSIVE RADON DECAY PRODUCTS MONITOR

    E-Print Network [OSTI]

    F. Stieff

    2006-01-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    Not Available

    1993-06-01T23:59:59.000Z

    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).

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

    E-Print Network [OSTI]

    Yu, K.N.

    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

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

    E-Print Network [OSTI]

    Yu, K.N.

    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

  6. Indoor radon and radon decay-product measurement-device protocols

    SciTech Connect (OSTI)

    Not Available

    1992-07-01T23:59:59.000Z

    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.

  7. Radon and material radiopurity assessment for the NEXT double beta decay experiment

    E-Print Network [OSTI]

    S. Cebrián; J. Pérez; I. Bandac; L. Labarga; V. Álvarez; A. I. Barrado; A. Bettini; F. I. G. M. Borges; M. Camargo; S. Cárcel; A. Cervera; C. A. N. Conde; E. Conde; T. Dafni; J. Díaz; R. Esteve; L. M. P. Fernandes; M. Fernández; P. Ferrario; E. D. C. Freitas; L. M. P. Fernandes; V. M. Gehman; A. Goldschmidt; J. J. Gómez-Cadenas; D. González-Díaz; R. M. Gutiérrez; J. Hauptman; J. A. Hernando Morata; D. C. Herrera; I. G. Irastorza; A. Laing; I. Liubarsky; N. López-March; D. Lorca; M. Losada; G. Luzón; A. Marí; J. Martín-Albo; A. Martínez; G. Martínez-Lema; T. Miller; F. Monrabal; M. Monserrate; C. M. B. Monteiro; F. J. Mora; L. M. Moutinho; J. Muńoz Vidal; M. Nebot-Guinot; D. Nygren; C. A. B. Oliveira; A. Ortiz de Solórzano; J. L. Pérez Aparicio; M. Querol; J. Renner; L. Ripoll; J. Rodríguez; F. P. Santos; J. M. F. dos Santos; L. Serra; D. Shuman; A. Simón; C. Sofka; M. Sorel; J. F. Toledo; J. Torrent; Z. Tsamalaidze; J. F. C. A. Veloso; J. A. Villar; R. C. Webb; J. T. White; N. Yahlali

    2015-05-26T23:59:59.000Z

    The Neutrino Experiment with a Xenon TPC (NEXT), intended to investigate the neutrinoless double beta decay using a high-pressure xenon gas TPC filled with Xe enriched in 136Xe at the Canfranc Underground Laboratory in Spain, requires ultra-low background conditions demanding an exhaustive control of material radiopurity and environmental radon levels. An extensive material screening process is underway for several years based mainly on gamma-ray spectroscopy using ultra-low background germanium detectors in Canfranc but also on mass spectrometry techniques like GDMS and ICPMS. Components from shielding, pressure vessel, electroluminescence and high voltage elements and energy and tracking readout planes have been analyzed, helping in the final design of the experiment and in the construction of the background model. The latest measurements carried out will be presented and the implication on NEXT of their results will be discussed. The commissioning of the NEW detector, as a first step towards NEXT, has started in Canfranc; in-situ measurements of airborne radon levels were taken there to optimize the system for radon mitigation and will be shown too.

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

    SciTech Connect (OSTI)

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

    1990-01-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    de Oliveira Loureiro, Celso

    1987-01-01T23:59:59.000Z

    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

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

    E-Print Network [OSTI]

    Nero, A.V.

    2008-01-01T23:59:59.000Z

    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

  11. 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...

  12. A Radon Progeny Deposition Model

    E-Print Network [OSTI]

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

    2010-12-30T23:59:59.000Z

    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.

  13. airborne sunphotometer airborne: Topics by E-print Network

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

    122 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  14. Radon and material radiopurity assessment for the NEXT double beta decay experiment

    E-Print Network [OSTI]

    Cebrián, S; Bandac, I; Labarga, L; Álvarez, V; Barrado, A I; Bettini, A; Borges, F I G M; Camargo, M; Cárcel, S; Cervera, A; Conde, C A N; Conde, E; Dafni, T; Díaz, J; Esteve, R; Fernandes, L M P; Fernández, M; Ferrario, P; Freitas, E D C; Gehman, V M; Goldschmidt, A; Gómez-Cadenas, J J; González-Díaz, D; Gutiérrez, R M; Hauptman, J; Morata, J A Hernando; Herrera, D C; Irastorza, I G; Laing, A; Liubarsky, I; López-March, N; Lorca, D; Losada, M; Luzón, G; Marí, A; Martín-Albo, J; Martínez, A; Martínez-Lema, G; Miller, T; Monrabal, F; Monserrate, M; Monteiro, C M B; Mora, F J; Moutinho, L M; Vidal, J Muńoz; Nebot-Guinot, M; Nygren, D; Oliveira, C A B; de Solórzano, A Ortiz; Aparicio, J L Pérez; Querol, M; Renner, J; Ripoll, L; Rodríguez, J; Santos, F P; Santos, J M F dos; Serra, L; Shuman, D; Simón, A; Sofka, C; Sorel, M; Toledo, J F; Torrent, J; Tsamalaidze, Z; Veloso, J F C A; Villar, J A; Webb, R C; White, J T; Yahlali, N

    2015-01-01T23:59:59.000Z

    The Neutrino Experiment with a Xenon TPC (NEXT), intended to investigate the neutrinoless double beta decay using a high-pressure xenon gas TPC filled with Xe enriched in 136Xe at the Canfranc Underground Laboratory in Spain, requires ultra-low background conditions demanding an exhaustive control of material radiopurity and environmental radon levels. An extensive material screening process is underway for several years based mainly on gamma-ray spectroscopy using ultra-low background germanium detectors in Canfranc but also on mass spectrometry techniques like GDMS and ICPMS. Components from shielding, pressure vessel, electroluminescence and high voltage elements and energy and tracking readout planes have been analyzed, helping in the final design of the experiment and in the construction of the background model. The latest measurements carried out will be presented and the implication on NEXT of their results will be discussed. The commissioning of the NEW detector, as a first step towards NEXT, has star...

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

    E-Print Network [OSTI]

    Nero, A.V.

    2008-01-01T23:59:59.000Z

    cancer death rate of 130,000 cases in the United States isUnited States attributable to radon exposure. * Lung Cancer Death Rate (

  16. Radon detection

    DOE Patents [OSTI]

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

    1994-01-25T23:59:59.000Z

    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.

  17. PASSIVE RADON PROGENY DOSIMETERS: FEASIBILITY STUDIES

    E-Print Network [OSTI]

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

    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.

  18. Radon reduction and radon monitoring in the NEMO experiment

    SciTech Connect (OSTI)

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

    2007-03-28T23:59:59.000Z

    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.

  19. Silica Fume as a Radon Retardant from Concrete

    E-Print Network [OSTI]

    Yu, K.N.

    , 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

  20. airborne em system: Topics by E-print Network

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

    191 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  1. airborne radioactivity levels: Topics by E-print Network

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

    Bronchial model; Radiation 1. Introduction Inhalation of airborne short-lived radon progeny in the indoor and outdoor environment yields the greatest amount of natural...

  2. airborne rhinovirus detection: Topics by E-print Network

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

    181 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  3. airborne releases estimativa: Topics by E-print Network

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

    172 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  4. airborne radioactive materials: Topics by E-print Network

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

    Bronchial model; Radiation 1. Introduction Inhalation of airborne short-lived radon progeny in the indoor and outdoor environment yields the greatest amount of natural...

  5. airborne acidity estimates: Topics by E-print Network

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

    169 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  6. airborne mycobacterium parafortuitum: Topics by E-print Network

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

    223 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  7. airborne allergens assessing: Topics by E-print Network

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

    183 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  8. airborne chemical emissions: Topics by E-print Network

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

    187 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  9. airborne sunphotometer measurements: Topics by E-print Network

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

    66 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  10. airborne pollutant concentrations: Topics by E-print Network

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

    5 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  11. airborne research canister: Topics by E-print Network

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

    159 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  12. airborne penicillium cfu: Topics by E-print Network

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

    151 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  13. airborne stachybotrys chartarum: Topics by E-print Network

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

    125 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  14. airborne separation assistance: Topics by E-print Network

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

    15 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  15. airborne particles: Topics by E-print Network

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

    153 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  16. airborne effluent control: Topics by E-print Network

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

    175 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  17. airborne gammaspectrometric systems: Topics by E-print Network

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

    166 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  18. airborne laser swath: Topics by E-print Network

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

    191 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  19. airborne radioactive contamination: Topics by E-print Network

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

    Bronchial model; Radiation 1. Introduction Inhalation of airborne short-lived radon progeny in the indoor and outdoor environment yields the greatest amount of natural...

  20. airborne aspergillus fumigatus: Topics by E-print Network

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

    176 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  1. airborne refueling demonstration: Topics by E-print Network

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

    158 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  2. airborne nanoparticle exposures: Topics by E-print Network

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

    182 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  3. airborne compositae dermatitis: Topics by E-print Network

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

    150 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  4. airborne organic acids: Topics by E-print Network

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

    192 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  5. airborne toxic metals: Topics by E-print Network

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

    187 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  6. airborne resistivity techniques: Topics by E-print Network

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

    152 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  7. airborne radiometric measurements: Topics by E-print Network

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

    105 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  8. airborne mixtures part: Topics by E-print Network

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

    P 18 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  9. airborne radionuclide monitoring: Topics by E-print Network

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

    188 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  10. airborne laser altimeter: Topics by E-print Network

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

    211 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

  11. Radon induced surface contaminations in low background experiments

    SciTech Connect (OSTI)

    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

    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.

  12. 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]

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

    2003-01-01T23:59:59.000Z

    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

  13. Radon Concern in the Hickory Aquifer 

    E-Print Network [OSTI]

    Crawford, Amanda

    2005-01-01T23:59:59.000Z

    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...

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

    E-Print Network [OSTI]

    Yu, K.N.

    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

  15. Radon reduction and radon monitoring in the NEMO experiment

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ) 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

  16. Automatically processed alpha-track radon monitor

    DOE Patents [OSTI]

    Langner, G.H. Jr.

    1993-01-12T23:59:59.000Z

    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.

  17. Articles Intercomparison of Retrospective Radon Detectors

    E-Print Network [OSTI]

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

    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

  18. RADON: A BIBLIOGRAPHY

    E-Print Network [OSTI]

    Lepman, S.R.

    2010-01-01T23:59:59.000Z

    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.

  19. RADON: A BIBLIOGRAPHY

    E-Print Network [OSTI]

    Lepman, S.R.

    2010-01-01T23:59:59.000Z

    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-

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

    E-Print Network [OSTI]

    G. Theodoulou; H. Tsertos; Y. Parpottas

    2012-06-26T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

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

    2012-01-01T23:59:59.000Z

    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...

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

    E-Print Network [OSTI]

    Yu, K.N.

    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

  3. Radon-222 progeny surface deposition and resuspension - residential materials

    SciTech Connect (OSTI)

    Leonard, B.E.

    1994-12-31T23:59:59.000Z

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

  4. Generation and mobility of radon in soil

    SciTech Connect (OSTI)

    Not Available

    1992-01-01T23:59:59.000Z

    Objectives of this research include: (1) To determine the processes that cause large seasonal and short-term changes in the radon (Rn) content of soil gases, and to develop methods of predicting and modeling these variations; (2) to evaluate the relation of Rn emanation coefficients to form of radium (Ra) and other U-series decay products, particularly the role of Ra in organic matter and Fe-oxides; (3) to evaluate the conditions in which convection of gas in soil and bedrock may affect soil gas radon availability in houses; and, (4) to collaborate with other DOE researchers on evaluation of Rn flux into houses, using our well characterized soil sites.

  5. Home Safety: Radon Gas 

    E-Print Network [OSTI]

    Shaw, Bryan W.; Denny, Monica L.

    1999-11-12T23:59:59.000Z

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

  6. Home Safety: Radon Gas

    E-Print Network [OSTI]

    Shaw, Bryan W.; Denny, Monica L.

    1999-11-12T23:59:59.000Z

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

  7. RADON: A BIBLIOGRAPHY

    E-Print Network [OSTI]

    Lepman, S.R.

    2010-01-01T23:59:59.000Z

    for dosimetry or uranium exploration can be affected byprediction and uranium exploration. It is noted thatRadon counters in uranium exploration. Publ. No. 1AEA- SM-

  8. RADON: A BIBLIOGRAPHY

    E-Print Network [OSTI]

    Lepman, S.R.

    2010-01-01T23:59:59.000Z

    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

  9. Attachment of radon progeny to cigarette-smoke aerosols

    SciTech Connect (OSTI)

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

    1995-05-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    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

    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 7.47±0.56 to 0.37±0.12 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}.

  11. Modeling surface backgrounds from radon progeny plate-out

    SciTech Connect (OSTI)

    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

    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.

  12. Radon measurements for earthquake prediction in northern India

    SciTech Connect (OSTI)

    Singh, B.; Virk, H.S. (Guru Nanak Dev Univ., Amritsar (India))

    1992-01-01T23:59:59.000Z

    Earthquake prediction is based on the observation of precursory phenomena, and radon has emerged as a useful precursor in recent years. In India, where 55% of the land area is in active seismic zones, considerable destruction was caused by the earthquakes of Kutch (1819), Shillong (1897), Kangra (1905), Bihar-Nepal (1934), Assam (1956), Koyna (1967), Bihar-Nepal (1988), and Uttarkashi (1991). Radon ([sup 222]Rn) is produced by the decay of radium ([sup 226]Ra) in the uranium decay series and is present in trace amounts almost everywhere on the earth, being distributed in soil, groundwater, and lower levels of atmosphere. The purpose of this study is to find the value in radon monitoring for earthquake prediction.

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

    E-Print Network [OSTI]

    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

    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.

  14. Radon: a bibliography

    SciTech Connect (OSTI)

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

    1981-01-01T23:59:59.000Z

    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.

  15. Generation and mobility of radon in soil. Annual report

    SciTech Connect (OSTI)

    Not Available

    1992-07-01T23:59:59.000Z

    Objectives of this research include: (1) To determine the processes that cause large seasonal and short-term changes in the radon (Rn) content of soil gases, and to develop methods of predicting and modeling these variations; (2) to evaluate the relation of Rn emanation coefficients to form of radium (Ra) and other U-series decay products, particularly the role of Ra in organic matter and Fe-oxides; (3) to evaluate the conditions in which convection of gas in soil and bedrock may affect soil gas radon availability in houses; and, (4) to collaborate with other DOE researchers on evaluation of Rn flux into houses, using our well characterized soil sites.

  16. Portable apparatus for the measurement of environmental radon and thoron

    DOE Patents [OSTI]

    Negro, Vincent C. (New Hyde Park, NY)

    2001-01-01T23:59:59.000Z

    The radometer is a portable instrument for the measurement of the concentration of atmospheric radon/thoron in a test area. A constant velocity pump pulls the air from the outside at a constant flow rate. If the air is too moist, some or all of the sample is passed through a desiccant filter prior to encountering an electrostatic filter. The electrostatic filter prevents any charged particles from entering the sampling chamber. Once the sample has entered the chamber, the progeny of the decay of radon/thoron are collected on a detector and measured. The measured data is compiled by a computer and displayed.

  17. Recoil-deposited Po-210 in radon dwellings

    SciTech Connect (OSTI)

    Samuelsson, C.

    1990-12-31T23:59:59.000Z

    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.

  18. MSIV leakage airborne iodine transport

    SciTech Connect (OSTI)

    Cline, J.E. (Cline Associates Inc., Rockville, MD (United States))

    1993-01-01T23:59:59.000Z

    Gaseous iodine deposits on surfaces exposed to vapors. Basic chemical and physical principles predict this behavior, and several laboratory and in-plant measurements demonstrate the characteristic. An empirical model was developed that describes the deposition, resuspension, and transformation of airborne radioiodine molecular species as a stream containing these forms moves along its pathway. The model uses a data base of measured values of deposition and resuspension rates in its application and describes the conversion of the more reactive inorganic iodine species I[sub 2] to the less reactive organic species CH[sub 3]I as the iodine deposits and resuspends along the path. It also considers radioactive decay and chemical surface bonding during residence on surfaces. For the 8-day [sup 131]I, decay during the airborne portion of the transport is negligible. Verification of the model included measurement tests of long gaseous-activity sampling lines of different diameters, operated at different flow rates and stream temperatures. The model was applied to the streams at a boiling water reactor nuclear power plant to describe the transport through leaking main steam isolation valves (MSIVs), following a loss-of-coolant accident.

  19. Radon mapping - Santa Barbara and Ventura counties

    SciTech Connect (OSTI)

    Churchill, R.

    1997-11-01T23:59:59.000Z

    Since 1990, the Department of Conservation`s Division of Mines and Geology (DMG) has provided geologic information and conducted several research projects on geology and radon for the California Department of Health Services (DHS) Radon Program. This article provides a brief overview of radon`s occurrence and impact on human health, and summarizes a recent DMG project for DHS that used geologic, geochemical, and indoor radon measurement data to produce detailed radon potential zone maps for Santa Barbara and Ventura counties.

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

    SciTech Connect (OSTI)

    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

    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.

  1. RADON PROGENY AS AN EXPERIMENTAL TOOL FOR DOSIMETRY OF NANOAEROSOLS

    E-Print Network [OSTI]

    Ruzer, Lev S.

    2008-01-01T23:59:59.000Z

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

  2. The Radon-Nikodym Theorem

    E-Print Network [OSTI]

    2010-07-12T23:59:59.000Z

    Page 1 ... for every E ? B. f is called the Radon-Nikodym derivative of ? with respect to µ and it is ... The assumption that the measure µ is ?-finite is crucial in the theorem (but we don't have this ... Now we prove the Radon-Nikodym Theorem.

  3. Passive environmental radon detector study

    SciTech Connect (OSTI)

    Not Available

    1992-03-01T23:59:59.000Z

    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.

  4. Passive environmental radon detector study

    SciTech Connect (OSTI)

    Not Available

    1992-03-01T23:59:59.000Z

    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.

  5. Airborne Internet : market & opportunity

    E-Print Network [OSTI]

    Bhadouria, Anand

    2007-01-01T23:59:59.000Z

    The purpose of this thesis to evaluate the opportunity for service provider entry and of the airborne internet, to analyze the disruptive impact technology used by AirCell and AeroSat has had on the development of an ...

  6. A RESIDENTIAL RADON DAUGHTER MONITOR BASED ON ALPHA SPECTROSCOPY

    E-Print Network [OSTI]

    Nazaroff, William W.

    2010-01-01T23:59:59.000Z

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

  7. Uranium mill tailings and radon

    SciTech Connect (OSTI)

    Hanchey, L A

    1981-01-01T23:59:59.000Z

    The major health hazard from uranium mill tailings is presumed to be respiratory cancer resulting from the inhalation of radon daughter products. A review of studies on inhalation of radon and its daughters indicates that the hazard from the tailings is extremely small. If the assumptions used in the studies are correct, one or two people per year in the US may develop cancer as a result of radon exhaled from all the Uranium Mill Tailings Remedial Action Program sites. The remedial action should reduce the hazard from the tailings by a factor of about 100.

  8. SUMMER TO SUMMER VARIATIONS IN INDOOR RADON

    E-Print Network [OSTI]

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

    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,

  9. SEISMIC IMAGING WITH THE GENERALIZED RADON ...

    E-Print Network [OSTI]

    2008-07-29T23:59:59.000Z

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

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

    E-Print Network [OSTI]

    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

    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...

  11. RADON 131 7. ANALYTICAL METHODS

    E-Print Network [OSTI]

    unknown authors

    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

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

    E-Print Network [OSTI]

    Yu, K.N.

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

  13. Airborne wireless communication systems, airborne communication methods, and communication methods

    DOE Patents [OSTI]

    Deaton, Juan D. (Menan, ID); Schmitt, Michael J. (Idaho Falls, ID); Jones, Warren F. (Idaho Falls, ID)

    2011-12-13T23:59:59.000Z

    An airborne wireless communication system includes circuitry configured to access information describing a configuration of a terrestrial wireless communication base station that has become disabled. The terrestrial base station is configured to implement wireless communication between wireless devices located within a geographical area and a network when the terrestrial base station is not disabled. The circuitry is further configured, based on the information, to configure the airborne station to have the configuration of the terrestrial base station. An airborne communication method includes answering a 911 call from a terrestrial cellular wireless phone using an airborne wireless communication system.

  14. 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...

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

    SciTech Connect (OSTI)

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

    2012-12-01T23:59:59.000Z

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

  16. Radon measurement in schools: Revised edition

    SciTech Connect (OSTI)

    Not Available

    1993-07-01T23:59:59.000Z

    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.

  17. Radon and radon daughter measurements at and near the former Middlesex Sampling Plant, Middlesex, New Jersey

    SciTech Connect (OSTI)

    Haywood, F.F.; Perdue, P.T.; Christian, D.J.; Leggett, R.W.; Dickson, H.W.; Myrick, T.E.

    1980-03-01T23:59:59.000Z

    The results of the radon and radon daughter measurements made to date (1978) at the Middlesex Sampling Plant in Middlesex, New Jersey, are presented in this report. These measurements were one portion of a more comprehensive radiological survey conducted at this site and the surrounding area from 1976 to 1978. The surveyed property served as a uranium ore sampling plant during the 1940's and early 1950's and as a result contains elevated levels of surface an subsurface contamination. On-site indoor radon daughter and radon concentrations exceeded both the US Surgeon General Guidelines and the Nuclear Regulatory Commission's maximum permissible concentration limits for radon (10 CFR Part 20) in all structures surveyed. Off-site structures showed concentrations of radon and radon daughters at or only slightly above background levels, except for one site where the radon levels were found to be above the 10 CFR Part 20 guidelines. Outdoor radon ad radon daughter concentrations, measured both on and off the site, were well below the guidelines, and the data give no indication of significant radon transport from the site.

  18. URANIUM MILL TAILINGS RADON FLUX CALCULATIONS

    E-Print Network [OSTI]

    URANIUM MILL TAILINGS RADON FLUX CALCULATIONS PIĂ?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

  19. Modeling for Airborne Contamination

    SciTech Connect (OSTI)

    F.R. Faillace; Y. Yuan

    2000-08-31T23:59:59.000Z

    The objective of Modeling for Airborne Contamination (referred to from now on as ''this report'') is to provide a documented methodology, along with supporting information, for estimating the release, transport, and assessment of dose to workers from airborne radioactive contaminants within the Monitored Geologic Repository (MGR) subsurface during the pre-closure period. Specifically, this report provides engineers and scientists with methodologies for estimating how concentrations of contaminants might be distributed in the air and on the drift surfaces if released from waste packages inside the repository. This report also provides dose conversion factors for inhalation, air submersion, and ground exposure pathways used to derive doses to potentially exposed subsurface workers. The scope of this report is limited to radiological contaminants (particulate, volatile and gaseous) resulting from waste package leaks (if any) and surface contamination and their transport processes. Neutron activation of air, dust in the air and the rock walls of the drift during the preclosure time is not considered within the scope of this report. Any neutrons causing such activation are not themselves considered to be ''contaminants'' released from the waste package. This report: (1) Documents mathematical models and model parameters for evaluating airborne contaminant transport within the MGR subsurface; and (2) Provides tables of dose conversion factors for inhalation, air submersion, and ground exposure pathways for important radionuclides. The dose conversion factors for air submersion and ground exposure pathways are further limited to drift diameters of 7.62 m and 5.5 m, corresponding to the main and emplacement drifts, respectively. If the final repository design significantly deviates from these drift dimensions, the results in this report may require revision. The dose conversion factors are further derived by using concrete of sufficient thickness to simulate the drift walls. The gamma-ray scattering properties of concrete are sufficiently similar to those of the host rock and proposed insert material; use of concrete will have no significant impact on the conclusions. The information in this report is presented primarily for use in performing pre-closure radiological safety evaluations of radiological contaminants, but it may also be used to develop strategies for contaminant leak detection and monitoring in the MGR. Included in this report are the methods for determining the source terms and release fractions, and mathematical models and model parameters for contaminant transport and distribution within the repository. Various particle behavior mechanisms that affect the transport of contaminant are included. These particle behavior mechanisms include diffusion, settling, resuspension, agglomeration and other deposition mechanisms.

  20. Airborne agent concentration analysis

    DOE Patents [OSTI]

    Gelbard, Fred

    2004-02-03T23:59:59.000Z

    A method and system for inferring airborne contaminant concentrations in rooms without contaminant sensors, based on data collected by contaminant sensors in other rooms of a building, using known airflow interconnectivity data. The method solves a least squares problem that minimizes the difference between measured and predicted contaminant sensor concentrations with respect to an unknown contaminant release time. Solutions are constrained to providing non-negative initial contaminant concentrations in all rooms. The method can be used to identify a near-optimal distribution of sensors within the building, when then number of available sensors is less than the total number of rooms. This is achieved by having a system-sensor matrix that is non-singular, and by selecting that distribution which yields the lowest condition number of all the distributions considered. The method can predict one or more contaminant initial release points from the collected data.

  1. Airborne Wind Turbine

    SciTech Connect (OSTI)

    None

    2010-09-01T23:59:59.000Z

    Broad Funding Opportunity Announcement Project: Makani Power is developing an Airborne Wind Turbine (AWT) that eliminates 90% of the mass of a conventional wind turbine and accesses a stronger, more consistent wind at altitudes of near 1,000 feet. At these altitudes, 85% of the country can offer viable wind resources compared to only 15% accessible with current technology. Additionally, the Makani Power wing can be economically deployed in deep offshore waters, opening up a resource which is 4 times greater than the entire U.S. electrical generation capacity. Makani Power has demonstrated the core technology, including autonomous launch, land, and power generation with an 8 meter wingspan, 20 kW prototype. At commercial scale, Makani Power aims to develop a 600 kW, 28 meter wingspan product capable of delivering energy at an unsubsidized cost competitive with coal, the current benchmark for low-cost power.

  2. Modeled atmospheric radon concentrations from uranium mines

    SciTech Connect (OSTI)

    Droppo, J.G.

    1985-04-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

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

    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

  4. Airborne Particulate Threat Assessment

    SciTech Connect (OSTI)

    Patrick Treado; Oksana Klueva; Jeffrey Beckstead

    2008-12-31T23:59:59.000Z

    Aerosol threat detection requires the ability to discern between threat agents and ambient background particulate matter (PM) encountered in the environment. To date, Raman imaging technology has been demonstrated as an effective strategy for the assessment of threat agents in the presence of specific, complex backgrounds. Expanding our understanding of the composition of ambient particulate matter background will improve the overall performance of Raman Chemical Imaging (RCI) detection strategies for the autonomous detection of airborne chemical and biological hazards. Improving RCI detection performance is strategic due to its potential to become a widely exploited detection approach by several U.S. government agencies. To improve the understanding of the ambient PM background with subsequent improvement in Raman threat detection capability, ChemImage undertook the Airborne Particulate Threat Assessment (APTA) Project in 2005-2008 through a collaborative effort with the National Energy Technology Laboratory (NETL), under cooperative agreement number DE-FC26-05NT42594. During Phase 1 of the program, a novel PM classification based on molecular composition was developed based on a comprehensive review of the scientific literature. In addition, testing protocols were developed for ambient PM characterization. A signature database was developed based on a variety of microanalytical techniques, including scanning electron microscopy, FT-IR microspectroscopy, optical microscopy, fluorescence and Raman chemical imaging techniques. An automated particle integrated collector and detector (APICD) prototype was developed for automated collection, deposition and detection of biothreat agents in background PM. During Phase 2 of the program, ChemImage continued to refine the understanding of ambient background composition. Additionally, ChemImage enhanced the APICD to provide improved autonomy, sensitivity and specificity. Deliverables included a Final Report detailing our findings and APICD Gen II subsystems for automated collection, deposition and detection of ambient particulate matter. Key findings from the APTA Program include: Ambient biological PM taxonomy; Demonstration of key subsystems needed for autonomous bioaerosol detection; System design; Efficient electrostatic collection; Automated bioagent recognition; Raman analysis performance validating Td<9 sec; Efficient collection surface regeneration; and Development of a quantitative bioaerosol defection model. The objective of the APTA program was to advance the state of our knowledge of ambient background PM composition. Operation of an automated aerosol detection system was enhanced by a more accurate assessment of background variability, especially for sensitive and specific sensing strategies like Raman detection that are background-limited in performance. Based on this improved knowledge of background, the overall threat detection performance of Raman sensors was improved.

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

    SciTech Connect (OSTI)

    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

    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.

  6. CURRENT STATE OF THE ART IN MEASURING ENVIRONMENTAL RADON

    E-Print Network [OSTI]

    A. C. George; N. Bredhoff

    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.

  7. Signal processing for airborne bistatic radar 

    E-Print Network [OSTI]

    Ong, Kian P

    The major problem encountered by an airborne bistatic radar is the suppression of bistatic clutter. Unlike clutter echoes for a sidelooking airborne monostatic radar, bistatic clutter echoes are range dependent. Using ...

  8. Lightning Strikes on Airborne Grounded Systems 

    E-Print Network [OSTI]

    Malinga, Gilbert Aporu

    2014-10-13T23:59:59.000Z

    , NOAA, 2014. ........................................................................................ 4 Fig. 1-2 Schematic illustrating airborne wind turbines based on the concept of a tethered buoyant blimp (Altaeros, 2014... of airborne structures of varied diameter. ............................... 73 Table 4-3 Surface electrical charge, tQ induced on cylindrical structures of varied geometry, representing an airborne wind turbine, as a function of elevation...

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

    SciTech Connect (OSTI)

    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

    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.

  10. 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

  11. Indoor Dose Conversion Coefficients for Radon Progeny for Different

    E-Print Network [OSTI]

    Yu, K.N.

    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

  12. The relation of seismic activity and radon concentration

    SciTech Connect (OSTI)

    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

    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.

  13. Measurement of radon concentrations at Super-Kamiokande

    E-Print Network [OSTI]

    Super-Kamiokade Collaboration; :; Y. Takeuchi et al

    1999-03-09T23:59:59.000Z

    Radioactivity from radon is a major background for observing solar neutrinos at Super-Kamiokande. In this paper, we describe the measurement of radon concentrations at Super-Kamiokande, the method of radon reduction, and the radon monitoring system. The measurement shows that the current low-energy event rate between 5.0 MeV and 6.5 MeV implies a radon concentration in the Super-Kamiokande water of less than 1.4 mBq/m$^3$.

  14. A new method for the determination of geophysical parameters by radon concentration measurements in bore-hole

    E-Print Network [OSTI]

    Horváth, Ákos

    a Department of Atomic Physics, Eo¨tvo¨s University, H-1117 Budapest, Pa´zma´ny Pe´ter se´ta´ny 1/A, Hungary b Lithosphere Fluid Research Laboratory, Department of Petrology and Geochemistry, Eo¨tvo¨s University, H-1117 of the uranium (238 U) radioactive decay chainwith half-life of 3.8 days. As is uranium, radon is present

  15. Radon free storage container and method

    DOE Patents [OSTI]

    Langner, Jr., G. Harold (Mack, CO); Rangel, Mark J. (Austin, CO)

    1991-01-01T23:59:59.000Z

    A radon free containment environment for either short or long term storage of radon gas detectors can be provided as active, passive, or combined active and passive embodiments. A passive embodiment includes a resealable vessel containing a basket capable of holding and storing detectors and an activated charcoal adsorbing liner between the basket and the containment vessel wall. An active embodiment includes the resealable vessel of the passive embodiment, and also includes an external activated charcoal filter that circulates the gas inside the vessel through the activated charcoal filter. An embodiment combining the active and passive embodiments is also provided.

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

    E-Print Network [OSTI]

    Boyer, Edmond

    , 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

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

    E-Print Network [OSTI]

    Richard W. Hornung; James Deddens; Robert Roscoe

    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)

  18. Airborne electromagnetic surveys as a reconnaissance technique...

    Open Energy Info (EERE)

    geothermal exploration Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: Airborne electromagnetic surveys as a reconnaissance technique for...

  19. A NEW ELECTROSTATIC RADON PROGENY COLLECTION METHOD

    E-Print Network [OSTI]

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

    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.

  20. An Experiment with Depressurization Tests as Indicators of Radon Availability in Six New Jersey Houses

    E-Print Network [OSTI]

    Gadgil, A.J.

    2008-01-01T23:59:59.000Z

    as Indicators of Radon Availability in 6 New Jersey HousesAS INDICATORS OF RADON AVAILABILITY IN 6 NEW JERSEY HOUSESas Indicators of Radon Availability in 6 New Jersey Houses

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

    E-Print Network [OSTI]

    Yu, K.N.

    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

  2. airborne aura big: Topics by E-print Network

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

    Computational Acoustics, Vol. 9, No. 3 (2001) 1215-1225 c IMACS AIRBORNE ACOUSTICS October 1999 Revised 16 April 2000 A recently developed theoretical model of the airborne...

  3. airborne thermal magnetic: Topics by E-print Network

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

    Computational Acoustics, Vol. 9, No. 3 (2001) 1215-1225 c IMACS AIRBORNE ACOUSTICS October 1999 Revised 16 April 2000 A recently developed theoretical model of the airborne...

  4. Quality Assurance Project Plan for radioactive airborne emissions data compilation and reporting

    SciTech Connect (OSTI)

    Burris, S.A.; Thomas, S.P.

    1994-02-01T23:59:59.000Z

    This Quality Assurance Project Plan addresses the quality assurance requirements for compiling data from radioactie aiborne emissions. These data will be reported to the US Environmental Protection Agency, the US Department of Energy, and the Washington State Department of Health. Hanford Site radioactive airborne emissions are reported to the US Environmental Protection Agency in compliance with Title 40, Protection of the Environment, Code of Federal Regulations, Part 61, ``National Emissions Standards for Hazardous Air Pollutants , ``Subpart H, ``National Emissions Standards for Emissions of Radionuclides Other Than Radon From Department of Energy Facilities`` (EPA 1989a). Reporting to US Department of Energy is performed in compliance with requirements of US Department of Energy Order 5400.1, General Environmental Protection Program (DOE 1988a).

  5. Radon Transport Into a Single-Family House with a Basement

    E-Print Network [OSTI]

    1984-01-01T23:59:59.000Z

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

  6. alpha-track radon monitor: Topics by E-print Network

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

    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,...

  7. Ambient Radon-222 Monitoring in Amargosa Valley, Nevada

    SciTech Connect (OSTI)

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

    2008-06-05T23:59:59.000Z

    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.

  8. austrian radon database: Topics by E-print Network

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

    proportion of lakes, and for stations influenced by B. W. Webb; F. Nobilis 29 A Radon Progeny Deposition Model CERN Preprints Summary: The next generation low-background...

  9. admissible du radon: Topics by E-print Network

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

    area of study on the University's application for admission Gering, Jon C. 92 A Radon Progeny Deposition Model CERN Preprints Summary: The next generation low-background...

  10. associe au radon: Topics by E-print Network

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

    le centre deux lithiums, la densit de Paris-Sud XI, Universit de 29 A Radon Progeny Deposition Model CERN Preprints Summary: The next generation low-background...

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

    E-Print Network [OSTI]

    Brewer, Robert Lewis

    1977-01-01T23:59:59.000Z

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

  12. Radon Concern in the Hickory Aquifer

    E-Print Network [OSTI]

    Crawford, Amanda

    2005-01-01T23:59:59.000Z

    Randolph conducts her research at a small field site in the Katemcy Creek watershed in northern Mason and southern McCulloch counties. She hopes to gather enough data to achieve the first step in a long-term assessment of radionuclides in the Hickory... in the world's aquifers that are geologically and hydrologically similar to the Hickory aquifer,? she said, anticipating her research leading to further investigations of relationships between radon gas and its parent nuclides, aquifer mineralogy...

  13. 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...

  14. 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...

  15. ARE RADON GAS MEASUREMENTS ADEQUATE FOR EPIDEMIOLOGICAL STUDIES AND CASE CONTROL

    E-Print Network [OSTI]

    Yu, K.N.

    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

  16. BEHAVIOR OF RADON PROGENY NEAR OUTDOOR SURFACES IN CONTRASTING TERRAINS

    E-Print Network [OSTI]

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

    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.

  17. Chemistry of airborne particles from metallurgical processing

    E-Print Network [OSTI]

    Jenkins, Neil Travis, 1973-

    2003-01-01T23:59:59.000Z

    Airborne particles fall into one of three size ranges. The nucleation range consists of nanoparticles created from vapor atom collisions. The decisive parameter for particle size and composition is the supercooling of the ...

  18. Principles for Sampling Airborne Radioactivity from Stacks

    SciTech Connect (OSTI)

    Glissmeyer, John A.

    2010-10-18T23:59:59.000Z

    This book chapter describes the special processes involved in sampling the airborne effluents from nuclear faciities. The title of the book is Radioactive Air Sampling Methods. The abstract for this chapter was cleared as PNNL-SA-45941.

  19. Airborne Gamma-Spectrometry in Switzerland

    SciTech Connect (OSTI)

    Butterweck, Gernot [Paul Scherrer Institut, 5232 Villigen PSI (Switzerland); Bucher, Benno [Swiss Federal Nuclear Safety Inspectorate, 5232 Villigen HSK (Switzerland); Rybach, Ladislaus [Swiss Federal Institute of Technology Zurich, Institute of Geophysics, 8093 Zurich (Switzerland)

    2008-08-07T23:59:59.000Z

    Airborne gamma-spectrometry is able to obtain fast radiological information over large areas. The airborne gamma-spectrometry unit deployed in Switzerland by the Swiss National Emergency Operations Centre (NEOC) consists of a Swiss army Super Puma helicopter equipped with four NaI-Detectors with a total volume of 17 liters, associated electronics and a real-time data evaluation and mapping unit developed by the Swiss Federal Institute of Technology (ETH) and the Paul Scherrer Institut (PSI). The operational readiness of the airborne gamma-spectrometry system is validated in annual exercises of one week duration. Data from 2005 and 2006 exercises are represented in maps of {sup 137}Cs activity concentration for two towns located in southern and western Switzerland. An indicator of man-made radioactivity (MMGC ratio) is demonstrated for an area with four different types of nuclear installations. The intercomparison between airborne gamma-spectrometry and ground measurements showed good agreement between both methods.

  20. Bayesian Prediction of Mean Indoor Radon Concentrations for Minnesota Counties

    SciTech Connect (OSTI)

    Price, P.N.; Nero, A.V.; Gelman, A.

    1995-08-01T23:59:59.000Z

    Past efforts to identify areas having higher than average indoor radon concentrations by examining the statistical relationship between local mean concentrations and physical parameters such as the soil radium concentration have been hampered by the noise in local means caused by the small number of homes monitored in some or most areas, In the present paper, indoor radon data from a survey in Minnesota are analyzed in such a way as to minimize the effect of finite sample size within counties, in order to determine the true county-to-county variation of indoor radon concentrations in the state and the extent to which this variation is explained by the variation in surficial radium concentration among counties, The analysis uses hierarchical modeling, in which some parameters of interest (such as county geometric mean (GM) radon concentrations) are assumed to be drawn from a single population, for which the distributional parameters are estimated from the data. Extensions of this technique, known as a random effects regression and mixed effects regression, are used to determine the relationship between predictive variables and indoor radon concentrations; the results are used to refine the predictions of each county's radon levels, resulting in a great decrease in uncertainty. The true county-to-county variation of GM radon levels is found to be substantially less than the county-to-county variation of the observed GMs, much of which is due to the small sample size in each county. The variation in the logarithm of surficial radium content is shown to explain approximately 80% of the variation of the logarithm of GM radon concentration among counties. The influences of housing and measurement factors, such as whether the monitored home has a basement and whether the measurement was made in a basement, are also discussed. This approach offers a self-consistent statistical method for predicting the mean values of indoor radon concentrations or other geographically distributed environmental parameters.

  1. airborne radioactivity measurements: Topics by E-print Network

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

    performed in the Gran Sasso Laboratory (LNGS) by detecting the gamma rays from the radon progeny. The motivation was to monitor the stability of radioactivity measuring several...

  2. Active airborne contamination control using electrophoresis

    SciTech Connect (OSTI)

    Veatch, B.D.

    1994-06-01T23:59:59.000Z

    In spite of our best efforts, radioactive airborne contamination continues to be a formidable problem at many of the Department of Energy (DOE) weapons complex sites. For workers that must enter areas with high levels of airborne contamination, personnel protective equipment (PPE) can become highly restrictive, greatly diminishing productivity. Rather than require even more restrictive PPE for personnel in some situations, the Rocky Flats Plant (RFP) is actively researching and developing methods to aggressively combat airborne contamination hazards using electrophoretic technology. With appropriate equipment, airborne particulates can be effectively removed and collected for disposal in one simple process. The equipment needed to implement electrophoresis is relatively inexpensive, highly reliable, and very compact. Once airborne contamination levels are reduced, less PPE is required and a significant cost savings may be realized through decreased waste and maximized productivity. Preliminary ``cold,`` or non-radioactive, testing results at the RFP have shown the technology to be effective on a reasonable scale, with several potential benefits and an abundance of applications.

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

    E-Print Network [OSTI]

    J. Dempsey; Rad Elec Inc

    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.

  4. RADON AND ITS DAUGHTERS IN ENERGY EFFICIENT BUILDINGS

    E-Print Network [OSTI]

    Nero, A.V.

    2010-01-01T23:59:59.000Z

    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,

  5. RADON AND ITS DAUGHTERS IN ENERGY EFFICIENT BUILDINGS

    E-Print Network [OSTI]

    Nero, A.V.

    2010-01-01T23:59:59.000Z

    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,

  6. Injectivity and stability for a generic class of generalized Radon ...

    E-Print Network [OSTI]

    2014-12-15T23:59:59.000Z

    then show injectivity and stability for an open, dense subset of smooth generalized Radon ..... ei(s??(y,?))s w(y, ?)J(y, ?)f(y) dVol(y) ds. = ?. M1. KRw (s

  7. astatine radon francium: Topics by E-print Network

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

    of quantization of topological mass in this context. K. Saygili 2010-03-27 37 A Radon Progeny Deposition Model CERN Preprints Summary: The next generation low-background...

  8. america residential radon: Topics by E-print Network

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

    of quantization of topological mass in this context. K. Saygili 2010-03-27 23 A Radon Progeny Deposition Model CERN Preprints Summary: The next generation low-background...

  9. au radon gaz: Topics by E-print Network

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

    (> 30 cm-1). Abstract. - The 6s 6d 1D2 Paris-Sud XI, Universit de 44 A Radon Progeny Deposition Model CERN Preprints Summary: The next generation low-background...

  10. assessing cumulative radon: 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...

  11. 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...

  12. CHARACTERIZATION OF LAND DEGRADATION PROCESSES USING AIRBORNE LASER SCANNING

    E-Print Network [OSTI]

    Marco, Shmuel "Shmulik"

    CHARACTERIZATION OF LAND DEGRADATION PROCESSES USING AIRBORNE LASER SCANNING Sagi Filin1 , Amit@tau.ac.il Commission VIII/8 KEY WORDS: Airborne laser scanning, Geomorphology, Dead Sea, Land Degradation, Sinkholes of collapse sinkholes in high resolution using airborne laser scanning technology. As a study case, we use

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

    E-Print Network [OSTI]

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

    2014-01-01T23:59:59.000Z

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

  14. Radon Transform in Finite Dimensional Hilbert Space

    E-Print Network [OSTI]

    M. Revzen

    2012-02-06T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

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

    2012-05-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Zapalac, Geordie H.

    2013-01-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Yu, K.N.

    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

  18. Sensitivity of LR 115 detectors in hemispherical chambers for radon measurements

    E-Print Network [OSTI]

    Yu, K.N.

    , 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. Ă?

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

    E-Print Network [OSTI]

    Yu, K.N.

    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

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

    E-Print Network [OSTI]

    Yu, K.N.

    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 fiÂĽCi/C0 (iÂĽ1, 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

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

    E-Print Network [OSTI]

    Vasquez, Gerard Michael

    1986-01-01T23:59:59.000Z

    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...

  2. The effect of desiccation on UMTRA Project radon barrier materials

    SciTech Connect (OSTI)

    Not Available

    1990-11-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Yu, K.N.

    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

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

    E-Print Network [OSTI]

    Yu, K.N.

    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

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

    E-Print Network [OSTI]

    Brenner, David Jonathan

    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

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

    E-Print Network [OSTI]

    Yu, K.N.

    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

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

    E-Print Network [OSTI]

    Yu, K.N.

    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

  8. Analyzing Options for Airborne Emergency Wireless Communications

    SciTech Connect (OSTI)

    Michael Schmitt; Juan Deaton; Curt Papke; Shane Cherry

    2008-03-01T23:59:59.000Z

    In the event of large-scale natural or manmade catastrophic events, access to reliable and enduring commercial communication systems is critical. Hurricane Katrina provided a recent example of the need to ensure communications during a national emergency. To ensure that communication demands are met during these critical times, Idaho National Laboratory (INL) under the guidance of United States Strategic Command has studied infrastructure issues, concerns, and vulnerabilities associated with an airborne wireless communications capability. Such a capability could provide emergency wireless communications until public/commercial nodes can be systematically restored. This report focuses on the airborne cellular restoration concept; analyzing basic infrastructure requirements; identifying related infrastructure issues, concerns, and vulnerabilities and offers recommended solutions.

  9. Airborne Tactical Free-Electron Laser

    SciTech Connect (OSTI)

    Roy Whitney; George Neil

    2007-02-01T23:59:59.000Z

    The goal of 100 kilowatts (kW) of directed energy from an airborne tactical platform has proved challenging due to the size and weight of most of the options that have been considered. However, recent advances in Free-Electron Lasers appear to offer a solution along with significant tactical advantages: a nearly unlimited magazine, time structures for periods from milliseconds to hours, radar like functionality, and the choice of the wavelength of light that best meets mission requirements. For an Airborne Tactical Free-Electron Laser (ATFEL) on a platforms such as a Lockheed C-130J-30 and airships, the two most challenging requirements, weight and size, can be met by generating the light at a higher harmonic, aggressively managing magnet weights, managing cryogenic heat loads using recent SRF R&D results, and using FEL super compact design concepts that greatly reduce the number of components. The initial R&D roadmap for achieving an ATFEL is provided in this paper. Performing this R&D is expected to further reduce the weight, size and power requirements for the FELs the Navy is currently developing for shipboard applications, as well as providing performance enhancements for the strategic airborne MW class FELs. The 100 kW ATFEL with its tactical advantages may prove sufficiently attractive for early advancement in the queue of deployed FELs.

  10. Quantifying forested stands with the pulsed airborne laser profiler

    E-Print Network [OSTI]

    Whatley, Michael Craig

    1986-01-01T23:59:59.000Z

    ) red H. Smeins (Member) Peter T Sprinz (Member) J ~ (Head aries Lee f Departmen ) May 1986 ABSTRACT Quantifying Forested Stands with the Pulsed Airborne Laser Profiler. (May 1986) Michael Craig Whatley, B. S. , Texas A&M University...; Chairman of Advisory Committee: Dr. Robert C. Maggio The use of airborne laser technology to enumerate forested stands was explored. A ground-based simulation laser, mimicing the pulsed airborne laser profiler (PALP) was used to quantify the PALP...

  11. ccpi-airborne_r2 | netl.doe.gov

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

    2 Industrial Carbon Capture and Storage Clean Coal Power Initiative Power Plant Improvement Initiative Clean Coal Technology Demonstration Program FutureGen AIRBORNE PROCESS(tm)...

  12. airborne science program: Topics by E-print Network

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

    A&M University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE August 1982 Major Subject: Nuclear Engineering AIRBORNE RADIOACTIVE MATERIAL...

  13. airborne oceanographic lidar: Topics by E-print Network

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

    Channels Landslides Spatial Cognition The emergence of airborne lidar data cognition and perception, we also explore the notion that the ongoing use of lidar enables...

  14. airborne aura lidar: Topics by E-print Network

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

    Channels Landslides Spatial Cognition The emergence of airborne lidar data cognition and perception, we also explore the notion that the ongoing use of lidar enables...

  15. airborne particulate threat: Topics by E-print Network

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

    particulate pollution in Beijing. Overall, coal burning and the traffic exhausts, plus mineral aerosol and it could provide the basic information in controlling the air-borne...

  16. airborne fungi particulate: Topics by E-print Network

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

    particulate pollution in Beijing. Overall, coal burning and the traffic exhausts, plus mineral aerosol and it could provide the basic information in controlling the air-borne...

  17. airborne particulates european: Topics by E-print Network

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

    particulate pollution in Beijing. Overall, coal burning and the traffic exhausts, plus mineral aerosol and it could provide the basic information in controlling the air-borne...

  18. airborne aerosol prediction: Topics by E-print Network

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

    modeling, radar, remote sensing, simulator, training. Dr. George; L. Bair; Camber Corporation 44 AIRBORNE MEASUREMENTS OF OZONE AND REACTIVE NITROGEN COMPOUNDS IN TAMPA,...

  19. Study and Simulation of Remote Sensing System: COMPACT Airborne Spectral Sensor (COMPASS)

    E-Print Network [OSTI]

    Salvaggio, Carl

    1 Study and Simulation of Remote Sensing System: COMPACT Airborne Spectral Sensor (COMPASS) Paper............................................................................................ 5 COMPACT Airborne Spectral Sensor (COMPASS............................................................................................... 9 (FOUO) COMPASS Megacollect Data

  20. E-Print Network 3.0 - airborne nitrogen load Sample Search Results

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

    airborne remote sensing surveys verify vegetation and land surface... radiometry Airborne remote sensing surveys Field Experiments Spatial Modeling ET Estimation 12;Integrated......

  1. airborne experimental test-bed: Topics by E-print Network

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

    Acoustics, Vol. 9, No. 3 (2001) 1215-1225 c IMACS AIRBORNE ACOUSTICS October 1999 Revised 16 April 2000 A recently developed theoretical model of the airborne acoustic...

  2. Small Sample Radon Testing of Homes in East Texas

    E-Print Network [OSTI]

    Crawford, J. G.

    1990-01-01T23:59:59.000Z

    This paper covers the results of small sample radon testing of homes in East Texas. The program was voluntary and participation was offered to a group of technical personnel involved in thc HVAC industry. Response was smaller than expected. The only...

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

    E-Print Network [OSTI]

    Dennis, Brian

    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

  4. Spherical radon transforms and mathematical problems of thermoacoustic tomography

    E-Print Network [OSTI]

    Ambartsoumian, Gaik

    2009-06-02T23:59:59.000Z

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

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

    SciTech Connect (OSTI)

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

    2013-09-15T23:59:59.000Z

    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.

  6. Ris-R-1462(EN) Airborne contamination in the indoor

    E-Print Network [OSTI]

    Risř-R-1462(EN) Airborne contamination in the indoor environment and its implications for dose K. Byskov, X.L. Hou, H. Prip, S.K. Olsen, T. Roed Title: Airborne contamination in the indoor environment of contaminant aerosol were examined, and since the previous measurements had indicated that elemental iodine

  7. Automatic Extraction of Cartographic Information from Airborne Interferometric SAR Data

    E-Print Network [OSTI]

    Mayer, Helmut A.

    Automatic Extraction of Cartographic Information from Airborne Interferometric SAR Data Reinhold cartographic feature extraction by the airborne AeS--1 instrument is presented. We extract regions corresponding to cartographic features for the classes built--up area, forest, water and open area. Water

  8. airborne gamma ray: Topics by E-print Network

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

    airborne gamma ray 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 Digital Logarithmic Airborne Gamma...

  9. Lightning Strikes on Airborne Grounded Systems

    E-Print Network [OSTI]

    Malinga, Gilbert Aporu

    2014-10-13T23:59:59.000Z

    LIST OF FIGURES Page Fig. 1-1 Histogram of the average wind speed over a 10 year period at an elevation of a) sH ? 100 m and b) sH ? 600 m, above the mean water level at Montauk, New York. Wind data accessed from the National Buoy Data Center.... The destructive power of lightning discharges to both land-based and airborne systems that cannot adequately dissipate large impulses of energy is well documented (Miyake et al., 1990; Sorensen et al., 1998; Uman and Rakov, 2003). Lightning discharges can...

  10. Asthmatic responses to airborne acid aerosols

    SciTech Connect (OSTI)

    Ostro, B.D.; Lipsett, M.J.; Wiener, M.B.; Selner, J.C. (California Department of Health Services, Berkeley (USA))

    1991-06-01T23:59:59.000Z

    Controlled exposure studies suggest that asthmatics may be more sensitive to the respiratory effects of acidic aerosols than individuals without asthma. This study investigates whether acidic aerosols and other air pollutants are associated with respiratory symptoms in free-living asthmatics. Daily concentrations of hydrogen ion (H+), nitric acid, fine particulates, sulfates and nitrates were obtained during an intensive air monitoring effort in Denver, Colorado, in the winter of 1987-88. A panel of 207 asthmatics recorded respiratory symptoms, frequency of medication use, and related information in daily diaries. We used a multiple regression time-series model to analyze which air pollutants, if any, were associated with health outcomes reported by study participants. Airborne H+ was found to be significantly associated with several indicators of asthma status, including moderate or severe cough and shortness of breath. Cough was also associated with fine particulates, and shortness of breath with sulfates. Incorporating the participants' time spent outside and exercise intensity into the daily measure of exposure strengthened the association between these pollutants and asthmatic symptoms. Nitric acid and nitrates were not significantly associated with any respiratory symptom analyzed. In this population of asthmatics, several outdoor air pollutants, particularly airborne acidity, were associated with daily respiratory symptoms.

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

    E-Print Network [OSTI]

    Madonia, Michael Vincent

    1990-01-01T23:59:59.000Z

    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...

  12. On the injectivity of the circular Radon transform arising in thermoacoustic

    E-Print Network [OSTI]

    On the injectivity of the circular Radon transform arising in thermoacoustic tomography Gaik, thermoacoustic tomogra­ phy (TAT or TCT) and its sibling photoacoustic tomography (PAT) have already made

  13. alpha-emitters radon lung: Topics by E-print Network

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

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

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

    E-Print Network [OSTI]

    Phillip H. Jenkins

    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.

  15. Airborne chemical baseline evaluation of the 222-S laboratory complex

    SciTech Connect (OSTI)

    Bartley, P., Fluor Daniel Hanford

    1997-02-12T23:59:59.000Z

    The 222-S Laboratory complex stores and uses over 400 chemicals. Many of these chemicals are used in laboratory analysis and some are used for maintenance activities. The majority of laboratory analysis chemicals are only used inside of fume hoods or glove boxes to control both chemical and radionuclide airborne concentrations. This evaluation was designed to determine the potential for laboratory analysis chemicals at the 222-S Laboratory complex to cause elevated airborne chemical concentrations under normal conditions. This was done to identify conditions and activities that should be subject to airborne chemical monitoring in accordance with the Westinghouse Hanford Company Chemical Hygiene Plan.

  16. A real-time airborne scatterometer data processor

    E-Print Network [OSTI]

    Reisor, Gary James

    1976-01-01T23:59:59.000Z

    A REAL-TIME AIRBORNE SCATTEROMETER DATA PROCES'SOR A Thesis by Gary James Reisor Submitted to the Graduate College of Texas A)M Vniversity in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1976 Major... Subject: Electrical Fngineering A REAL-TIME AIRBORNE SCATTEROMETER DATA PROCESSOR A Thesis by Gary James Reisor Approved as to style and content by: arrman o Committee Hea o Depa tment em er Mem er August 1976 ABSTRACT A Real-time Airborne...

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

    E-Print Network [OSTI]

    Fruchtnicht, Erich Harold

    2004-11-15T23:59:59.000Z

    ..........................................................................................................................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...

  18. A study of radon-222 concentrations in North Carolina groundwater

    SciTech Connect (OSTI)

    Evans, J.P.

    1992-12-31T23:59:59.000Z

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

  19. SEASONAL AND ANNUAL AVERAGE RADON LEVELS IN 70 HOUSES

    E-Print Network [OSTI]

    C. S. Dudney; A. R. Hawthorne

    1988-01-01T23:59:59.000Z

    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

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

    E-Print Network [OSTI]

    Yu, K.N.

    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

  1. airborne laser scanner: Topics by E-print Network

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

    12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 A glacier inventory for South Tyrol, Italy, based on airborne laser-scanner data Geosciences Websites...

  2. Human Occupancy as a Source of Indoor Airborne Bacteria

    E-Print Network [OSTI]

    Hospodsky, Denina

    Exposure to specific airborne bacteria indoors is linked to infectious and noninfectious adverse health outcomes. However, the sources and origins of bacteria suspended in indoor air are not well understood. This study ...

  3. airborne moisture-indicating microorganisms: Topics by E-print...

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

    OF A COLD FRONT AS REVEALED BY AIRBORNE 95 GHZ RADAR Bart cold front moved through the Texas Panhandle . . The front was intercepted by an armada of mobile-defined dryline and a...

  4. Airborne coastal current survey system for difficult to access areas

    E-Print Network [OSTI]

    Pollock, Cheryl Elaine

    1994-01-01T23:59:59.000Z

    The development of an airborne current measurement system that can provide a near-synoptic view of near-bottom currents in extremely hostile wave and current environments is described. A helicopter is used as the support platform from which...

  5. Epidemiology of Airborne Virulent Rhodococcus equi at Horse Breeding Farms

    E-Print Network [OSTI]

    Kuskie, Kyle Ryan

    2012-02-14T23:59:59.000Z

    Rhodococcus equi causes severe pneumonia, resulting in disease and sometimes death of foals. Infection is thought to occur by inhalation of dust contaminated with virulent R equi. A recent study of 3 horse breeding farms in Ireland found airborne...

  6. accidental airborne releases: Topics by E-print Network

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

    Fred A. Kruse; Joseph W. Boardman; Jonathan F. Huntington 2003-01-01 347 AUGUST 1961 MONTHLY WEATHER REVIEW 285 ACCURACY OF THE AIRBORNE ECONOMICAL RADIOMETER CiteSeer Summary:...

  7. affects on the transport of airborne emissions. This information...

    National Nuclear Security Administration (NNSA)

    due to airborne material. Detailed analyses (CRWMS M&O 1995a, 1997b) of the local wind characteristics in the study area led to the choice of Site 1 as the meteorological...

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

    E-Print Network [OSTI]

    Bruce E. Lehnert; Edwin H. Goodwin

    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,

  9. Semileptonic Decays

    SciTech Connect (OSTI)

    Luth, Vera G.; /SLAC

    2012-10-02T23:59:59.000Z

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

  10. An airborne digital processor for radar scatterometer data

    E-Print Network [OSTI]

    Yeadon, David Steven

    1977-01-01T23:59:59.000Z

    AN AIRBORNE DIGITAL PROCESSOR FOR RADAR SCATTEROMETER DATA A Thesis by DAVID STEVEN YEADON Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1977... Major Subject: Electrical Engineering AN AIRBORNE DIGITAL PROCESSOR FOR RADAR SCATTEROMETER DATA A Thesis by DAVID STEVEN YEADON Approved as to style and content by: (Chairman o Committee) Head of epartment) ( (Member ) (Member) August 1977...

  11. Simulated performance of an airborne lidar wind shear detection system

    E-Print Network [OSTI]

    Griffith, Kenneth Scott

    1987-01-01T23:59:59.000Z

    SIMULATED PERFORMANCE OF AN AIRBORNE LIDAR WIND SHEAR DETECTION SYSTEM A Thesis by KENNETH SCOTT GRIFFITH Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE... December 1987 Major Subject: Physics SIMULATED PERFORMANCE OF AN AIRBORNE LIDAR WIND SHEAR DETECTION SYSTEM A Thesis by KENNETH SCOTT GRIFFITH Approved as to style and content by: e . atta ar (Chair an of Committee) T omas . air, III (Member) ic...

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

    E-Print Network [OSTI]

    Nero, A.V.

    2008-01-01T23:59:59.000Z

    Program, Bonneville Power Administration Report DOE/BP- 71.geological data, Bonneville Power Administration Report DOE/data from the Bonneville Power Administration's Residential

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

    E-Print Network [OSTI]

    Nero, A.V.

    2008-01-01T23:59:59.000Z

    p. I 13. Subbarao, K. and Balcomb, J.D. (1988). Short-termuse by Subbarao and Balcomb (1988). There is hope that a

  14. WAVELET SAMPLING AND LOCALIZATION SCHEMES FOR THE RADON TRANSFORM IN TWO DIMENSIONS

    E-Print Network [OSTI]

    Virginia Tech

    WAVELET SAMPLING AND LOCALIZATION SCHEMES FOR THE RADON TRANSFORM IN TWO DIMENSIONS SHIYING ZHAO. 57, No. 6, pp. 1749­1762, December 1997 013 Abstract. Two theorems are presented for wavelet-norm between the Radon transform and its wavelet approximation whose coefficients at different scales

  15. Development of Super-high Sensitivity Radon Detector for the Super-Kamiokande Detector

    E-Print Network [OSTI]

    Takeuchi, Yasuo

    Development of Super-high Sensitivity Radon Detector for the Super-Kamiokande Detector C.Mitsuda d for the Super-Kamiokande detector was developed. Super-high sensitivity was achieved through the utilization-day measurement. PACS: 29.40.-n Keywords: Radon; Super-Kamiokande; Electrostatic collection; Photodiode; Membrane

  16. Development of a data base on radon in US homes and applications. Final technical report

    SciTech Connect (OSTI)

    Cohen, B.L.

    1991-12-31T23:59:59.000Z

    This research led to the development of the compilation of data on radon in homes which is included in this document. This research also contributed to the development of two papers analyzing the results. These are a case control study test and tests of the liner no-threshold theory for lung cancer induced by exposure to radon in residential buildings.

  17. Development of a data base on radon in US homes and applications

    SciTech Connect (OSTI)

    Cohen, B.L.

    1991-01-01T23:59:59.000Z

    This research led to the development of the compilation of data on radon in homes which is included in this document. This research also contributed to the development of two papers analyzing the results. These are a case control study test and tests of the liner no-threshold theory for lung cancer induced by exposure to radon in residential buildings.

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

    E-Print Network [OSTI]

    Yu, K.N.

    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/alleviate this discrepancy, including those based on different lung morpho- metry models(4) , different ethnic groups(5

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

    E-Print Network [OSTI]

    Forozani, Ghasem

    2011-01-01T23:59:59.000Z

    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.

  20. 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)

    NONE

    1997-12-01T23:59:59.000Z

    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.

  1. Radon entry into buildings: Effects of atmospheric pressure fluctuations and building structural factors

    SciTech Connect (OSTI)

    Robinson, A.L. [Univ. of California, Berkeley, CA (United States). Dept. of Mechanical Engineering]|[Lawrence Berkeley Lab., CA (United States)

    1996-05-01T23:59:59.000Z

    An improved understanding of the factors that control radon entry into buildings is needed in order to reduce the public health risks caused by exposure to indoor radon. This dissertation examines three issues associated with radon entry into buildings: (1) the influence of a subslab gravel layer and the size of the openings between the soil and the building interior on radon entry; (2) the effect of atmospheric pressure fluctuations on radon entry; and (3) the development and validation of mathematical models which simulate radon and soil-gas entry into houses. Experiments were conducted using two experimental basements to examine the influence of a subslab gravel layer on advective radon entry driven by steady indoor-outdoor pressure differences. These basement structures are identical except that in one the floor slab lies directly on native soil whereas in the other the slab lies on a high-permeability gravel layer. The measurements indicate that a high permeability subslab gravel layer increases the advective radon entry rate into the structure by as much as a factor of 30. The magnitude of the enhancement caused by the subslab gravel layer depends on the area of the openings in the structure floor; the smaller the area of these openings the larger the enhancement in the radon entry rate caused by the subslab gravel layer. A three-dimensional, finite-difference model correctly predicts the effect of a subslab gravel layer and open area configuration on advective radon entry driven by steady indoor-outdoor pressure differences; however, the model underpredicts the absolute entry rate into each structure by a factor of 1.5.

  2. ARM Airborne Continuous carbon dioxide measurements

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Biraud, Sebastien

    The heart of the AOS CO2 Airborne Rack Mounted Analyzer System is the AOS Manifold. The AOS Manifold is a nickel coated aluminum analyzer and gas processor designed around two identical nickel-plated gas cells, one for reference gas and one for sample gas. The sample and reference cells are uniquely designed to provide optimal flushing efficiency. These cells are situated between a black-body radiation source and a photo-diode detection system. The AOS manifold also houses flow meters, pressure sensors and control valves. The exhaust from the analyzer flows into a buffer volume which allows for precise pressure control of the analyzer. The final piece of the analyzer is the demodulator board which is used to convert the DC signal generated by the analyzer into an AC response. The resulting output from the demodulator board is an averaged count of CO2 over a specified hertz cycle reported in volts and a corresponding temperature reading. The system computer is responsible for the input of commands and therefore works to control the unit functions such as flow rate, pressure, and valve control.The remainder of the system consists of compressors, reference gases, air drier, electrical cables, and the necessary connecting plumbing to provide a dry sample air stream and reference air streams to the AOS manifold.

  3. Transport of radon and thoron at the earth's surface

    SciTech Connect (OSTI)

    Schery, S.D.

    1992-07-01T23:59:59.000Z

    This report covers progress under the current funding period 1 Jan 1992 to 1 Jan 1993 and presents the continuation proposal for 1 Jan 1993 to 1 Jan 1994. The previous progress report was submitted in June 1991, so activities during the last half of 1991 will also be included. Our major activities over the last year have continued to focus on measurements and modeling of the disequilibrium of radon and thoron progeny outdoors, and analysis of data on indoor thoron and thoron progeny.

  4. Development of a new airborne humidigraph system.

    SciTech Connect (OSTI)

    Pekour, Mikhail S.; Schmid, Beat; Chand, Duli; Hubbe, John M.; Kluzek, Celine D.; Nelson, Danny A.; Tomlinson, Jason M.; Cziczo, Daniel J.

    2012-12-06T23:59:59.000Z

    Modeling and measurements of aerosol properties is complicated by the hygroscopic behavior of the aerosols adding significant uncertainty to our best estimates of the direct effect aerosols exert on the radiative balance of the atmosphere. Airborne measurements of aerosol hygroscopicity are particularly challenging but critically needed. This motivated the development of a newly designed system which can measure the dependence of the aerosol light scattering coefficient (?sp) on relative humidity (RH), known as f(RH), in real-time at a rapid rate (<10 s) on an aerial platform. The new system has several advantages over existing systems. It consists of three integrating nephelometers and humidity conditioners for simultaneous measurement of the ?sp at three different RHs. The humidity is directly controlled in exchanger cells without significant temperature disturbances and without particle dilution, heating or loss of volatile compounds. The single-wavelength nephelometers are illuminated by LED-based light sources thereby minimizing heating of the sample stream. The flexible design of the RH conditioners, consisting of a number of specially designed exchanger cells (driers or humidifiers), enables us to measure f(RH) under hydration or dehydration conditions (always starting with the aerosol in a known state) with a simple system re-configuration. These exchanger cells have been characterized for losses of particles using latex spheres and laboratory generated ammonium sulfate aerosols. Residence times of 6 - 9 s in the exchangers and subsequent lines is sufficient for most aerosols to attain equilibrium with the new water vapor content. The performance of this system has been assessed aboard DOE’s G-1 research aircraft during test flights over California, Oregon, and Washington.

  5. BioSAR Airborne Biomass Sensing System

    SciTech Connect (OSTI)

    Graham, R.L.; Johnson, P.

    2007-05-24T23:59:59.000Z

    This CRADA was developed to enable ORNL to assist American Electronics, Inc. test a new technology--BioSAR. BioSAR is a an airborne, low frequency (80-120 MHz {approx} FM radio frequencies) synthetic aperture radar (SAR) technology which was designed and built for NASA by ZAI-Amelex under Patrick Johnson's direction. At these frequencies, leaves and small branches are nearly transparent and the majority of the energy reflected from the forest and returned to the radar is from the tree trunks. By measuring the magnitude of the back scatter, the volume of the tree trunk and therefore the biomass of the trunks can be inferred. The instrument was successfully tested on tropical rain forests in Panama. Patrick Johnson, with American Electronics, Inc received a Phase II SBIR grant from DOE Office of Climate Change to further test and refine the instrument. Mr Johnson sought ORNL expertise in measuring forest biomass in order for him to further validate his instrument. ORNL provided ground truth measurements of forest biomass at three locations--the Oak Ridge Reservation, Weyerhaeuser Co. commercial pine plantations in North Carolina, and American Energy and Power (AEP) Co. hardwood forests in southern Ohio, and facilitated flights over these forests. After Mr. Johnson processed the signal data from BioSAR instrument, the processed data were given to ORNL and we attempted to derive empirical relationships between the radar signals and the ground truth forest biomass measurements using standard statistical techniques. We were unsuccessful in deriving such relationships. Shortly before the CRADA ended, Mr Johnson discovered that FM signal from local radio station broadcasts had interfered with the back scatter measurements such that the bulk of the signal received by the BioSAR instrument was not backscatter from the radar but rather was local radio station signals.

  6. An interim protocol for the mitigation of radon in nonresidential buildings

    SciTech Connect (OSTI)

    Wilson, D.L.; Dudney, C.S.; Gammage, R.B.

    1993-07-01T23:59:59.000Z

    To date, the US Environmental Protection Agency has not published guidance for radon testing, diagnostics, or mitigation within large, nonresidential buildings. Current research indicates that large buildings may contain construction features or mechanical systems that could inhibit the installation or operation of a mitigation system. Health and safety issues such as asbestos and fire codes may further interfere with the installation process. Studies also show that elevated radon can be restricted to a particular area or room within a building and not be uniformly distributed. A four-step, sequential protocol has been developed to address these issues and facilitate large building radon mitigation.

  7. IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY 1 Airborne Wind Energy Based on Dual Airfoils

    E-Print Network [OSTI]

    IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY 1 Airborne Wind Energy Based on Dual Airfoils Mario Zanon, S´ebastien Gros, Joel Andersson and Moritz Diehl Abstract--The Airborne Wind Energy paradigm Airborne Wind Energy enables flight in higher-altitude, stronger wind layers, the extra drag generated

  8. Control of Airborne Wind Energy Systems Based on Nonlinear Model Predictive Control & Moving Horizon Estimation

    E-Print Network [OSTI]

    Control of Airborne Wind Energy Systems Based on Nonlinear Model Predictive Control & Moving arising in the Airborne Wind Energy paradigm, an essential one is the control of the tethered airfoil], [3], the Airborne Wind Energy (AWE) paradigm shift proposes to get rid of the structural elements

  9. Airborne Infrared Target Tracking with the Nintendo Wii Remote Sensor

    E-Print Network [OSTI]

    Beckett, Andrew 1984-

    2012-11-12T23:59:59.000Z

    AIRBORNE INFRARED TARGET TRACKING WITH THE NINTENDO WII REMOTE SENSOR A Thesis by ANDREW WILSON BECKETT Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements for the degree of MASTER... of UAS in use today and provide invaluable capabilities to both the military and civil services. UAS are well-suited to the ISR role: large UAS can remain airborne for far longer than the limits of human endurance without needing to be large enough...

  10. Remote monitoring of soil moisture using airborne microwave radiometers

    E-Print Network [OSTI]

    Kroll, Charles Lindsey

    1973-01-01T23:59:59.000Z

    REMOTE MONITORING OF SOIL MOISTURE USING AIRBORNE MICROWAVE RADIOMETERS A Thesis by CHARLES LINDSEY J(ROLL Submitted to the Graduate College of Texas A)M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE... August 1973 Major Subject: Electrical Engineering REMOTE MONITORING OF SOIL MOISTURE USING AIRBORNE MICROWAVE RADIOMETERS A Thesis by CHARLES LINDSEY KROLL Approved as to style and content by: man o Co mrtt Hca o D artmc c Ill l c r Mem e Member...

  11. Airborne asbestos fiber evaluation: a comparison of three methods

    E-Print Network [OSTI]

    Studinka, Emil

    1979-01-01T23:59:59.000Z

    AIRBORNE ASBFSTOS FIBER EVALUATION-A CONPARISON OF TliR'E NETHODS A Thesis EYiIL STUDINKA Submitted to the Graduate Co'ilege of Texas ALN University in partial fulfillment of the requirement for the degree of HASTER OF SCIEtiCE December 1979... Najor Subject: Industrial Hygiene AIRBORNE ASBESTOS FIBER EVALUATION-A COMPARISON OF THRFE METHODS A Thesis by EMIL STUDI NKA Approved as to style and content by: ichard B. onzen air ar, of Committee) llaymon L. Johnston (Member) hlilliam P...

  12. The development of a passive dosimeter for airborne benzene vapors

    E-Print Network [OSTI]

    Hager, David William

    1978-01-01T23:59:59.000Z

    THE DEVELOPMENT OF A PASSIVE DOSIMETER FOR AIRBORNE BENZENE VAPORS A Thesis DAVID NII LIAM HAGER Submitted to the Graduate Colleqe of Texas ASM University in partial fulfillment of the requirement for the d"gree of MASTER OF SC. IENCE May IB...7B Major Subject: Indus t& ial Hyqiene THE DEVELOPMENT OF A PASSIVE DOSIMETER FOR AIRBORNE BFNZENE VAPORS A Thesis by DAVID NILLIAM HAGER Approved as to style and content by: Z Chairman of Commi t e~ ~'g C'S~ Head of Department~ Member...

  13. The development of a passive dosimeter for airborne aniline vapors

    E-Print Network [OSTI]

    Campbell, James Evan

    1977-01-01T23:59:59.000Z

    THE DEVELOPMENT OF A PASSIVE DOSIMETER FOR AIRBORNE ANILINE VAPORS A Thesis by James Evan Campbell Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE I...'iay 1977 Major Subject: Industrial Hygiene THE DEVELOPMENT OF A PASSIVE DOSIMETER FOR AIRBORNE ANILINE VAPORS A Thesis by James E van Campbe1 1 Approved as to style and content by: Chairm of Com itt ea of De rtment Member Member May 1977...

  14. Baryon helicity in B decay

    SciTech Connect (OSTI)

    Suzuki, Mahiko

    2005-05-13T23:59:59.000Z

    We extend the perturbative argument of helicity amplitudes to the two-body baryonic decays of B decays.

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

    SciTech Connect (OSTI)

    Wilhite, E.L.

    2003-01-15T23:59:59.000Z

    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.

  16. Indoor-Atmospheric Radon-Related Radioactivity Affected by a Change of Ventilation Strategy

    E-Print Network [OSTI]

    Kobayashi, T

    2006-01-01T23:59:59.000Z

    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 University. Accidentally, in the midst of an observation term, i.e., February 2005, the facility management group of the university changed a strategy for the manner of ventilation, probably because of a recession: (I) tidy everyday ventilation of 7:30-24:00 into (II) shortened weekday ventilation of 8:00-21:00 with weekend halts. This change of ventilation manner brought a clear alteration for the concentrations of radon-related natural radioactivity in indoor air. The present paper concerns an investigation of the effect of the ventilation strategy on the indoor-atmospheric radon-related radioactivity.

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

    SciTech Connect (OSTI)

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

    1990-07-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

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

    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.

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

    SciTech Connect (OSTI)

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

    1990-04-01T23:59:59.000Z

    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.

  20. The application of a scintillation flask technique for the measurement of radon emanation

    E-Print Network [OSTI]

    Charles, Martha

    1984-01-01T23:59:59.000Z

    THE APPLICATION OF A SCINTILLATION FLASK TECHNIQUE FOR THE MEASUREMENT OF RADON EMANATION A Thesis by MARTHA CHARLES Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE May 1984 Major Subject: Nuclear Engineering THE APPLICATION OF A SCINTILLATION FLASK TECHNIQUE FOR THE MEASUREMENT OF RADON EMANATION A Thesis by MARTHA CHARLES Approved as to style and content by: chard Dea (Chairman of C m ittee...

  1. Mitigating Geomagnetic Noise in Airborne Magnetic Surveys using GPS

    E-Print Network [OSTI]

    Calgary, University of

    Mitigating Geomagnetic Noise in Airborne Magnetic Surveys using GPS S. Skone Department and tropospheric effects on GPS. She has developed software for mitigation of atmospheric effects and is currently in this frequency band must be modeled, or measured, and mitigated. Despite reduction of many error sources for MAD

  2. Passive Remote Sensing of Clouds from Airborne Platforms

    E-Print Network [OSTI]

    Toohey, Darin W.

    instrument: the Solar Spectral Flux Radiometer (SSFR) · Some spectrometry/radiometry basics · How can we Airborne Measurements? · For climate studies, the high temporal and spatial variability of aerosols vertical profiles of radiative flux: where is radiative energy being deposited? · Combined with in situ

  3. airborne high energy: Topics by E-print Network

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

    airborne high energy 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 Department of Geomatics...

  4. The study of cirrus clouds using airborne and satellite data

    E-Print Network [OSTI]

    Meyer, Kerry Glynne

    2004-09-30T23:59:59.000Z

    Cirrus clouds are known to play a key role in the earth's radiation budget, yet are one of the most uncertain components of the earth-atmosphere system. With the development of instruments such as the Airborne Visible/Infrared Imaging Spectrometer...

  5. airborne carbon 14c: Topics by E-print Network

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

    airborne carbon 14c 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 PERSPECTIVE PERSPECTIVE Blowin'...

  6. Quality Assurance Program Plan for radionuclide airborne emissions monitoring

    SciTech Connect (OSTI)

    Vance, L.M.

    1993-07-01T23:59:59.000Z

    This Quality Assurance Program Plan (QAPP) describes the quality assurance requirements and responsibilities for radioactive airborne emissions measurements activities from regulated stacks are controlled at the Hanford Site. Detailed monitoring requirements apply to stacks exceeding 1% of the standard of 10 mrem annual effective dose equivalent to the maximally exposed individual from operations of the Hanford Site.

  7. airborne differential absorption: Topics by E-print Network

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

    airborne differential absorption 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 Department of...

  8. Study of temporal variation of radon concentrations in public drinking water supplies

    SciTech Connect (OSTI)

    York, E.L. [Univ. of North Carolina, Chapel Hill, NC (United States). Dept. of Environmental Sciences and Engineering

    1995-12-31T23:59:59.000Z

    The Environmental Protection Agency (EPA) has proposed a Maximum Contaminant Level (MCL) for radon-222 in public drinking water supplies of 300 pCi/L. Proposed monitoring requirements include collecting quarterly grab samples for the first year, then annual samples for the remainder of the compliance cycle provided first year quarterly samples average below the MCL. The focus of this research was to study the temporal variation of groundwater radon concentrations to investigate how reliably one can predict an annual average radon concentration based on the results of grab samples. Using a {open_quotes}slow-flow{close_quotes} collection method and liquid scintillation analysis, biweekly water samples were taken from ten public water supply wells in North Carolina (6 month - 11 month sampling periods). Based on study results, temporal variations exist in groundwater radon concentrations. Statistical analysis performed on the data indicates that grab samples taken from each of the ten wells during the study period would exhibit groundwater radon concentrations within 30% of their average radon concentration.

  9. 'Radon Concentration Survey in Inner Rooms from Deputy Chamber and National Congress-Brasilia/DF'

    SciTech Connect (OSTI)

    Nicoli, Ieda Gomes [Escritorio de Brasilia-CNEN Quadra 4 Bl. B Sala 1002 A Setor Comercial Norte CEP 70714-900 Brasilia-DF (Brazil); Cardozo, Katia Maria [Instituto de Engenharia Nuclear-CNEN Rua Helio de Almeida, 75--Cidade Universitaria-Ilha do Fundao CEP 21941-906-Caixa Postal 68550 Rio de Janeiro-RJ (Brazil); Azevedo Gouvea, Vandir de [Divisao de Materias Primas e Minerais-DIMAP-CNEN Rua General Severiano, 90-Botafogo CEP 22290-901 Rio de Janeiro-RJ (Brazil)

    2008-08-07T23:59:59.000Z

    Radon gas has been monitored in many environments such as rural and urban houses, high natural radioactivity areas and underground mining regions. Nevertheless few data are reported in literature about studies in state buildings. So we get in touch with these buildings managers, where work the Deputy Chamber and the National Congress in Brasilia--DF, in order to obtain radon data in these state buildings, so representative for brazilian people. In order to make a preliminary scanning of radon concentration in these buildings, it was put in selected points, radon nuclear track passive detectors type SSNTD, specifically polycarbonate Lexan, which were exposed for periods from two to five months. Afterwards they were sent to Nuclear Engineering Institute in Rio de Janeiro for analysis of {sup 222}Rn contents. Derived values, whose average value was about 73 Bq/m{sup 3}, were all under maximum permissible limits for radon 200 Bq/m{sup 3}, established by International Comission on Radiological Protection--ICRP 65, for inner environments of houses and state buildings. This work has been coordinated by CNEN Office in Braselia with effective participation of Nuclear Engineering Institute from CNEN--RJ, that has worked since beginning of april 2004, supplying and analysing radon detectors.

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

    SciTech Connect (OSTI)

    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

    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)

  11. First detection of tracks of radon progeny recoils by MIMAC

    E-Print Network [OSTI]

    Riffard, Q; Bosson, G; Bourrion, O; Descombes, T; Fourel, C; Guillaudin, O; Muraz, J -F; Colas, P; Ferrer-Ribas, E; Giomataris, I; Busto, J; Fouchez, D; Tao, C; Lebreton, L; Maire, D

    2015-01-01T23:59:59.000Z

    The MIMAC experiment is a $\\mu$-TPC matrix project for directional dark matter search. Directional detection is a strategy based on the measurement of the WIMP flux anisotropy due to the solar system motion with respect to the dark matter halo. The main purpose of MIMAC project is the measurement of the energy and the direction of nuclear recoils in 3D produced by elastic scattering of WIMPs. Since June 2012 a bi-chamber prototype is operating at the Modane underground laboratory. In this paper, we report the first ionization energy and 3D track observations of nuclear recoils produced by the radon progeny. This measurement shows the capability of the MIMAC detector and opens the possibility to explore the low energy recoil directionality signature.

  12. First detection of tracks of radon progeny recoils by MIMAC

    E-Print Network [OSTI]

    Q. Riffard; D. Santos; G. Bosson; O. Bourrion; T. Descombes; C. Fourel; O. Guillaudin; J. -F. Muraz; P. Colas; E. Ferrer-Ribas; I. Giomataris; J. Busto; D. Fouchez; C. Tao; L. Lebreton; D. Maire

    2015-04-22T23:59:59.000Z

    The MIMAC experiment is a $\\mu$-TPC matrix project for directional dark matter search. Directional detection is a strategy based on the measurement of the WIMP flux anisotropy due to the solar system motion with respect to the dark matter halo. The main purpose of MIMAC project is the measurement of the energy and the direction of nuclear recoils in 3D produced by elastic scattering of WIMPs. Since June 2012 a bi-chamber prototype is operating at the Modane underground laboratory. In this paper, we report the first ionization energy and 3D track observations of nuclear recoils produced by the radon progeny. This measurement shows the capability of the MIMAC detector and opens the possibility to explore the low energy recoil directionality signature.

  13. Double Beta Decay: Scintillators

    E-Print Network [OSTI]

    Mark C. Chen

    2008-10-20T23:59:59.000Z

    Scintillator detectors can be used in experiments searching for neutrinoless double beta decay. A wide variety of double beta decay candidate isotopes can be made into scintillators or can be loaded into scintillators. Experimental programs developing liquid xenon, inorganic crystals, and Nd-loaded liquid scintillator are described in this review. Experiments with 48Ca and 150Nd benefit from their high endpoint which places the neutrinoless double beta decay signal above most backgrounds from natural radioactivity.

  14. B decays and Supersymmetry

    E-Print Network [OSTI]

    Anirban Kundu

    2002-05-10T23:59:59.000Z

    I discuss how supersymmetry affects various observables in B decays, and point out the interesting channels in the context of B factories.

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

    SciTech Connect (OSTI)

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

    1988-12-01T23:59:59.000Z

    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.

  16. 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]

    Yu, K.N.

    . 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 Ă? t

  17. 7/3/08 6:50 AMBuzzword: Radon: Consumer Reports Home & Garden Blog Page 1 of 3http://blogs.consumerreports.org/home/2008/06/radon-counters.html#comments

    E-Print Network [OSTI]

    Llope, William J.

    , Countertops, Surfaces Green/Environmental Issues Heating & Cooling Home Improvement Home Repair & Maintenance7/3/08 6:50 AMBuzzword: Radon: Consumer Reports Home & Garden Blog Page 1 of 3http://blogs.consumerreports.org/home/2008/06/radon-counters.html#comments About this blog Consumer Reports' Home & Garden staff reports

  18. Double beta decay experiments

    E-Print Network [OSTI]

    A. S. Barabash

    2006-02-22T23:59:59.000Z

    The present status of double beta decay experiments are reviewed. The results of the most sensitive experiments, NEMO-3 and CUORICINO, are discussed. Proposals for future double beta decay experiments are considered. In these experiments sensitivity for the effective neutrino mass will be on the level of (0.1-0.01) eV.

  19. Double beta decay experiments

    E-Print Network [OSTI]

    A. S. Barabash

    2011-07-28T23:59:59.000Z

    The present status of double beta decay experiments is reviewed. The results of the most sensitive experiments are discussed. Proposals for future double beta decay experiments with a sensitivity to the $$ at the level of (0.01--0.1) eV are considered.

  20. A 100-micron polarimeter for the Kuiper Airborne Observatory

    SciTech Connect (OSTI)

    Novak, G.; Gonatas, D.P.; Hildebrand, R.H.; Platt, S.R.

    1989-02-01T23:59:59.000Z

    Consideration is given to the design and performance of the 100-micron polarimeter proposed for use on the NASA Kuiper Airborne Observatory. The polarimeter specifications are listed. The polarimeter design and data reduction techniques are based on the work of Hildebrand et al. (1984) and Dragovan (1986). The polarimeter has an improved signal-to-noise ratio and systematic measurement errors below 0.2 percent. 20 refs.

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

    SciTech Connect (OSTI)

    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

    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.

  2. Rare B Decays and B Decay Dynamics

    E-Print Network [OSTI]

    William T. Ford

    2005-10-20T23:59:59.000Z

    I present some recent measurements of B meson decay rates to leptonic and charmless hadronic final states, as well as of CP-violation charge asymmetries and other features. I sketch the theoretical frameworks used to predict these, and indicate the level of agreement of the estimates with experiment.

  3. An investigation of the geology and geochemistry of radon in shear zones

    SciTech Connect (OSTI)

    Schumann, R.R.; Stanton, M.R.; Gundersen, L.C.S. [Geological Survey, Denver, CO (United States); Gates, A.E. [Rutgers--the State Univ., Newark, NJ (United States). Dept. of Geology; Schultz, A.P. [Geological Survey, Reston, VA (United States); Speer, J.A. [North Carolina Univ., Raleigh, NC (United States). Dept. of Marine, Earth and Atmospheric Sciences

    1991-12-31T23:59:59.000Z

    In this study we will characterize the four principal geologic terrains that cause the highest and most extensive indoor radon problems in the United States, we will predict their national distribution, and we will define the climatic and chemical processes that affect uranium and radium siting in rocks and soils, and ultimately their emanation and radon potential. We have chosen nine sheared granite plutons from different climatic areas across the United States, two faulted carbonate terrains from an and area and a humid area, and three sites within the fractured Pierre shale and the glacial deposits derived from it in the northern Great Plains. The results of our studies for the last four years have established that in order to understand and accurately predict radon transport and availability in rocks, soils, and ground water, the factors affecting radon emanation must be quantitatively described and basic models developed to understand the processes involved. Three phases of the project were worked on this (1) Preliminary assessment of the Alleghenian granites and compilation of data for establishing the relation between heat flow and radon production and availability, (2) development of a field emanation protocol, and (3) ongoing geochemical examination of shear zone processes.

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

    SciTech Connect (OSTI)

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

    2013-07-03T23:59:59.000Z

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

  5. Conventional and synthetic aperature processing for airborne ground penetrating radar

    SciTech Connect (OSTI)

    Cameron, R.M. [Airborne Environmental Surveys, Santa Maria, CA (United States); Simkins, W.L.; Brown, R.D. [MSB Technologies, Inc., Rome, NY (United States)

    1994-12-31T23:59:59.000Z

    For the past four years Airborne Environmental Surveys (AES), a Division of Era Aviation, Inc. has used unique and patented airborne Frequency-Modulated, Continuous Wave (FM-CW) radars and processes for detecting and mapping subsurface phenomena. Primary application has focused on the detection of man-made objects in landfills, hazardous waste sites (some of which contain unexploded ordinance), and subsurface plumes of refined free-floating hydrocarbons. Recently, MSB Technologies, Inc. (MSB) has developed a form of synthetic aperture radar processing (SAR), called GPSAR{trademark}, that is tailored especially for the AES radars. Used as an adjunct to more conventional airborne ground-penetrating radar data processing techniques, GPSAR takes advantage of the radars` coherent transmission and produces imagery that is better focused and more accurate in determining an object`s range and true depth. This paper describes the iterative stages of data processing and analysis used with the radars and shows the added advantages that GPSAR processing offers.

  6. Effectiveness of bomber deployed autonomous airborne vehicles in finding rail mobile SS-24s

    SciTech Connect (OSTI)

    Abey, A.E.; Erickson, S.A.; Norquist, P.D.

    1990-08-01T23:59:59.000Z

    Computer simulation predictions of the effectiveness of autonomous airborne vehicles in finding rail mobile SS-24s are presented. Effectiveness is discussed for several autonomous airborne vehicle endurances and survivabilities for the search area southwest of Moscow. The effect of where the Soviets place the SS-24s on the rail network was also investigated. The simulation predicts significant variations in the ability of a multi-autonomous airborne vehicle system to find SS-24s with these parameters. 12 figs., 1 tab.

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

    SciTech Connect (OSTI)

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

    1984-03-01T23:59:59.000Z

    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.

  8. RARE KAON DECAYS.

    SciTech Connect (OSTI)

    LITTENBERG, L.

    2005-07-19T23:59:59.000Z

    Lepton flavor violation (LFV) experiments have probed sensitivities corresponding to mass scales of well over 100 TeV, making life difficult for models predicting accessible LFV in kaon decay and discouraging new dedicated experiments of this type.

  9. Neutrinoless double beta decay

    E-Print Network [OSTI]

    K. Zuber

    2012-01-23T23:59:59.000Z

    The physics potential of neutrinoless double beta decay is discussed. Furthermore, experimental considerations are presented as well as the current status of experiments. Finally an outlook towards the future, work on nuclear matrix elements and alternative processes is given.

  10. Constraining Decaying Dark Matter

    E-Print Network [OSTI]

    Ran Huo

    2011-07-13T23:59:59.000Z

    We revisited the decaying dark matter (DDM) model, in which one collisionless particle decays early into two collisionless particles, that are potentially dark matter particles today. The effect of DDM will be manifested in the cosmic microwave background (CMB) and structure formation. With a systematic modification of CMB calculation tool \\texttt{camb}, we can numerically calculated this effect, and compare it to observations. Further Markov Chain Monte Carlo \\texttt{cosmomc} runnings update the constraints in that model: the free streaming length $\\lambda_{FS}\\lesssim0.5$Mpc for nonrelativistic decay, and $((M_{DDM}/keV) Y)^2 (T_d/yr)\\lesssim5\\times10^{-5}$ for relativistic decay.

  11. Radon-Nikodym type theorem for {alpha}-completely positive maps

    SciTech Connect (OSTI)

    Heo, Jaeseong [Department of Mathematics, Research Institute for Natural Sciences, Hanyang University, Seoul 133-791 (Korea, Republic of); Ji, Un Cig [Department of Mathematics, Research Institute of Mathematical Finance, Chungbuk National University, Cheongju 361-763 (Korea, Republic of)

    2010-10-15T23:59:59.000Z

    We introduce a new notion of {alpha}-completely positive map on a C*-algebra as a generalization of the notion of completely positive map. Then we study a theorem of the Radon-Nikodym type that there is a one-to-one correspondence between {alpha}-completely positive maps and positive operators and, as an application of the Radon-Nikodym type theorem, we give a characterization of pure {alpha}-completely positive maps. Finally, we study a covariant version of the Stinespring's theorem for a covariant {alpha}-completely positive map (see Theorem 4.3).

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

    E-Print Network [OSTI]

    Jessick, James G.

    1988-01-01T23:59:59.000Z

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

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

    SciTech Connect (OSTI)

    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

    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.

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

    SciTech Connect (OSTI)

    Littfin, K.M.

    1992-09-01T23:59:59.000Z

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

  15. The application of a scintillation flask technique for the measurement of radon emanation 

    E-Print Network [OSTI]

    Charles, Martha

    1984-01-01T23:59:59.000Z

    after the specifications recommended by the Health and Safety Laboratory (HASL), which initially bor- rowed the design from the Ar entinian Comision Nacional de ~E' . EA A t' ' Co ' ' t d ty plastic block and fitted the cell with a single stop... are fitted on the flask to allow flow- through sample collection when desired. Sensitivities of the small and large radon flasks are reported to be 0. 7 cpm/pci/1 to 2 cpm/pci/1 after the daughters have grown to equilibrium 11 with radon (Ge76). The HASL...

  16. Double Beta Decay

    E-Print Network [OSTI]

    Steven R. Elliott; Petr Vogel

    2002-02-27T23:59:59.000Z

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

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

    SciTech Connect (OSTI)

    Not Available

    1991-01-01T23:59:59.000Z

    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.

  18. A glacier inventory for South Tyrol, Italy, based on airborne laser-scanner data

    E-Print Network [OSTI]

    Kerschner, Hanns

    A glacier inventory for South Tyrol, Italy, based on airborne laser-scanner data Christoph KNOLL-mail: christoph.knoll@uibk.ac.at ABSTRACT. A new approach to glacier inventory, based on airborne laser supervision. Earlier inventories, from 1983 and 1997, are used to compare changes in area, volume

  19. Biomass and Bioenergy 31 (2007) 646655 Estimating biomass of individual pine trees using airborne lidar

    E-Print Network [OSTI]

    2007-01-01T23:59:59.000Z

    Biomass and Bioenergy 31 (2007) 646­655 Estimating biomass of individual pine trees using airborne biomass and bio-energy feedstocks. The overall goal of this study was to develop a method for assessing aboveground biomass and component biomass for individual trees using airborne lidar data in forest settings

  20. Entwicklung eines Qualittsmodells fr die Generierung von Digitalen Gelndemodellen aus Airborne Laser Scanning

    E-Print Network [OSTI]

    Giger, Christine

    Laser Scanning Dr. sc. ETH Jürg Lüthy Zürich, 2008 #12;#12;Diese Publikation ist eine editierte Version Geländemodellen aus Airborne Laser Scanning A B H A N D L U N G zur Erlangung des Titels DOKTOR DER WISSENSCHAFTEN Qualitätsmodells für die Generierung von Digitalen Geländemodellen aus Airborne Laser Scanning Copyright © 2008

  1. Evaluation of Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) and Moderate Resolution Imaging Spectrometer

    E-Print Network [OSTI]

    Evaluation of Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) and Moderate Resolution the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) and the Moderate Resolution Imaging Spectrometer (MODIS). Key goals were to assess the nature of these relationships as they varied between sensors

  2. airborne gamma-ray spectra: Topics by E-print Network

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

    airborne gamma-ray spectra 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 Digital Logarithmic Airborne...

  3. Abstract--Airborne pollution and explosive gases threaten human health and occupational safety, therefore generating high

    E-Print Network [OSTI]

    Mason, Andrew

    Abstract--Airborne pollution and explosive gases threaten human health and occupational safety and a thumb-drive sized prototype system. I. INTRODUCTION xposure to air pollution consistently ranks among to occupational safety as energy demands rise. Airborne pollutants and explosive gases vary in both time and space

  4. Prospecting by sampling and analysis of airborne particulates and gases

    DOE Patents [OSTI]

    Sehmel, G.A.

    1984-05-01T23:59:59.000Z

    A method is claimed for prospecting by sampling airborne particulates or gases at a ground position and recording wind direction values at the time of sampling. The samples are subsequently analyzed to determine the concentrations of a desired material or the ratios of the desired material to other identifiable materials in the collected samples. By comparing the measured concentrations or ratios to expected background data in the vicinity sampled, one can select recorded wind directions indicative of the upwind position of the land-based source of the desired material.

  5. A Relaxation Strategy for the Optimization of Airborne Wind Energy Sebastien Gros, M. Zanon and Moritz Diehl

    E-Print Network [OSTI]

    A Relaxation Strategy for the Optimization of Airborne Wind Energy Systems S´ebastien Gros, M. Zanon and Moritz Diehl Abstract-- Optimal control is recognized by the Airborne Wind Energy (AWE problem. Keywords : airborne wind energy, optimal control, non- convex optimization, flight control I

  6. Relation between Fresnel transform of input light field and Radon transform of Wigner function of the field

    E-Print Network [OSTI]

    Hong-yi Fan; Li-yun Hu

    2008-08-21T23:59:59.000Z

    We prove a new theorem about the relationship between optical field Wigner function's Radon transform and optical Fresnel transform of the field, i.e., when an input field Phi(x') propagates through an optical [D(-B)(-C)A] system, the energy density of the output field is equal to the Radon transform of the Wigner function of the input field, where the Radon transform parameters are D,B. We prove this theorem in both spatial-domain and frequency-domain.

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

    SciTech Connect (OSTI)

    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

    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)

  8. Weighted Radon transforms for which the Chang approximate inversion formula is precise

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Weighted Radon transforms for which the Chang approximate inversion formula is precise R.G. Novikov formula is precise. Some subsequent results, including the Cormack type inversion for these transforms, are also given. 1.Introduction We consider the weighted ray transformation PW defined by the formula PW f

  9. Environmental Radioactivity 47 (2000) 127}133 Radon concentrations in hot spring waters in

    E-Print Network [OSTI]

    Horváth, Ákos

    2000-01-01T23:59:59.000Z

    in northern Venezuela AD . HorvaH th *, L.O. Bohus , F. Urbani , G. Marx , A. PiroH th , E.D. Greaves Eo( tvo and underground waters stemming from uranium-rich soil are the "rst candidates for high radon and radium

  10. RADON AND PROGENY ALPHA-PARTICLE ENERGY ANALYSIS USING NUCLEAR TRACK METHODOLOGY

    SciTech Connect (OSTI)

    Espinosa Garcia, Guillermo [ORNL; Golzarri y Moreno, Dr. Jose Ignacio [Instituto de Fisica, Mexico; Bogard, James S [ORNL

    2008-01-01T23:59:59.000Z

    A preliminary procedure for alpha energy analysis of radon and progeny using Nuclear Track Methodology (NTM) is described in this paper. The method is based on the relationship between alpha-particle energies deposited in polycarbonate material (CR-39) and the track size developed after a well-established chemical etching process. Track geometry, defined by parameters such as major or minor diameters, track area and overall track length, is shown to correlate with alpha-particle energy over the range 6.00 MeV (218Po) to 7.69 MeV (214Po). Track features are measured and the data analyzed automatically using a digital imaging system and commercial PC software. Examination of particle track diameters in CR-39 exposed to environmental radon reveals a multi-modal distribution. Locations of the maxima in this distribution are highly correlated with alpha particle energies of radon daughters, and the distributions are sufficiently resolved to identify the radioisotopes. This method can be useful for estimating the radiation dose from indoor exposure to radon and its progeny.

  11. 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

  12. AIR AND RADON PATHWAY MODELING FOR THE F AREA TANK FARM

    SciTech Connect (OSTI)

    Dixon, K.; Phifer, M.

    2010-07-30T23:59:59.000Z

    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.

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

    DOE Patents [OSTI]

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

    1999-01-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Smith, Hart F.

    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

  15. Monotonic Local Decay Estimates

    E-Print Network [OSTI]

    Avy Soffer

    2011-10-29T23:59:59.000Z

    For the Hamiltonian operator H = -{\\Delta}+V(x) of the Schr\\"odinger Equation with a repulsive potential, the problem of local decay is considered. It is analyzed by a direct method, based on a new, L^2 bounded, propagation observable. The resulting decay estimate, is in certain cases monotonic in time, with no "Quantum Corrections". This method is then applied to some examples in one and higher dimensions. In particular the case of the Wave Equation on a Schwarzschild manifold is redone: Local decay, stronger than the known ones are proved (minimal loss of angular derivatives and lower order of radial derivatives of initial data). The method developed here can be an alternative in some cases to the Morawetz type estimates, with L^2-multipliers replacing the first order operators. It provides an alternative to Mourre's method, by including thresholds and high energies.

  16. WHY SEARCH FOR DOUBLE BETA DECAY?

    E-Print Network [OSTI]

    Kayser, B.

    2010-01-01T23:59:59.000Z

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

  17. Cosmology with decaying particles

    SciTech Connect (OSTI)

    Turner, M.S.

    1984-09-01T23:59:59.000Z

    We consider a cosmological model in which an unstable massive relic particle species (denoted by X) has an initial mass density relative to baryons ..beta../sup -1/ identically equal rho/sub X//rho/sub B/ >> 1, and then decays recently (redshift z less than or equal to 1000) into particles which are still relativistic today (denoted by R). We write down and solve the coupled equations for the cosmic scale factor a(t), the energy density in the various components (rho/sub X/, rho/sub R/, rho/sub B/), and the growth of linear density perturbations (delta rho/rho). The solutions form a one parameter (..beta..) family of solutions; physically ..beta../sup -1/ approx. = (..cap omega../sub R//..cap omega../sub NR/) x (1 + z/sub D/) = (ratio today of energy density of relativistic to nonrelativistic particles) x (1 + redshift of (decay)). We discuss the observational implications of such a cosmological model and compare our results to earlier results computed in the simultaneous decay approximation. In an appendix we briefly consider the case where one of the decay products of the X is massive and becomes nonrelativistic by the present epoch. 21 references.

  18. Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    Heinrich Päs; Werner Rodejohann

    2015-07-01T23:59:59.000Z

    We review the potential to probe new physics with neutrinoless double beta decay $(A,Z) \\to (A,Z+2) + 2 e^-$. Both the standard long-range light neutrino mechanism as well as short-range mechanisms mediated by heavy particles are discussed. We also stress aspects of the connection to lepton number violation at colliders and the implications for baryogenesis.

  19. Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    Päs, Heinrich

    2015-01-01T23:59:59.000Z

    We review the potential to probe new physics with neutrinoless double beta decay $(A,Z) \\to (A,Z+2) + 2 e^-$. Both the standard long-range light neutrino mechanism as well as short-range mechanisms mediated by heavy particles are discussed. We also stress aspects of the connection to lepton number violation at colliders and the implications for baryogenesis.

  20. Vacuum Energy Decay

    E-Print Network [OSTI]

    Enrique Álvarez; Roberto Vidal

    2011-11-09T23:59:59.000Z

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

  1. Neutrinoless double beta decay

    E-Print Network [OSTI]

    Petr Vogel

    2006-11-17T23:59:59.000Z

    The status of the search for neutrinoless double beta decay is reviewed. The effort to reach the sensitivity needed to cover the effective Majorana neutrino mass corresponding to the degenerate and inverted mass hierarchy is described. Various issues concerning the theory (and phenomenology) of the relation between the $0\

  2. atmospheric 222rn decay: Topics by E-print Network

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

    performed in the Gran Sasso Laboratory (LNGS) by detecting the gamma rays from the radon progeny. The motivation was to monitor the stability of radioactivity measuring several...

  3. Final report. Electro-Seise, Inc., Airborne Survey

    SciTech Connect (OSTI)

    Schulte, Ralph

    2001-06-01T23:59:59.000Z

    The Rocky Mountain Oilfield Testing Center (RMOTC) has recently completed a test of an airborne microgravity and electric field sensing technology developed by Electro-Seise, Inc. of Fort Worth, Texas. The test involved the use of a single engine airplane to gather data over the Teapot Dome oil field along a tight grid spacing and along thirty (30) survey lines. The resultant gravity structure maps, based on the field data, were found to overlay the known structure of Teapot Dome. In addition, fault maps, based on the field data, were consistent with the known fault strike at Teapot Dome. Projected hydrocarbon thickness maps corresponded to some of the known production histories at RMOTC. Exceptions to the hydrocarbon thickness maps were also found to be true.

  4. Method for measuring the size distribution of airborne rhinovirus

    SciTech Connect (OSTI)

    Russell, M.L.; Goth-Goldstein, R.; Apte, M.G.; Fisk, W.J.

    2002-01-01T23:59:59.000Z

    About 50% of viral-induced respiratory illnesses are caused by the human rhinovirus (HRV). Measurements of the concentrations and sizes of bioaerosols are critical for research on building characteristics, aerosol transport, and mitigation measures. We developed a quantitative reverse transcription-coupled polymerase chain reaction (RT-PCR) assay for HRV and verified that this assay detects HRV in nasal lavage samples. A quantitation standard was used to determine a detection limit of 5 fg of HRV RNA with a linear range over 1000-fold. To measure the size distribution of HRV aerosols, volunteers with a head cold spent two hours in a ventilated research chamber. Airborne particles from the chamber were collected using an Andersen Six-Stage Cascade Impactor. Each stage of the impactor was analyzed by quantitative RT-PCR for HRV. For the first two volunteers with confirmed HRV infection, but with mild symptoms, we were unable to detect HRV on any stage of the impactor.

  5. Initial assessment of an airborne Ku-band polarimetric SAR.

    SciTech Connect (OSTI)

    Raynal, Ann Marie; Doerry, Armin Walter

    2013-02-01T23:59:59.000Z

    Polarimetric synthetic aperture radar (SAR) has been used for a variety of dual-use research applications since the 1940's. By measuring the direction of the electric field vector from radar echoes, polarimetry may enhance an analyst's understanding of scattering effects for both earth monitoring and tactical surveillance missions. Polarimetry may provide insight into surface types, materials, or orientations for natural and man-made targets. Polarimetric measurements may also be used to enhance the contrast between scattering surfaces such as man-made objects and their surroundings. This report represents an initial assessment of the utility of, and applications for, polarimetric SAR at Ku-band for airborne or unmanned aerial systems.

  6. Clean enough for industry? An airborne geophysical case study

    SciTech Connect (OSTI)

    Nyquist, J.E.; Beard, L.P.

    1996-02-01T23:59:59.000Z

    Data from two airborne geophysical surveys of the Department of Energy`s Oak Ridge Reservation (ORR) were extremely valuable in deciding whether a 1000-acre (400 hectare) parcel of the ORR should be released to the City of Oak Ridge for industrial development. Our findings, based on electromagnetic and magnetic data, were incorporated in the federally mandated Environmental Assessment Statement (EAS), and in general supported claims that this land was never used as a hazardous waste disposal site. We estimated the amount of iron required to produce each anomaly using a simple dipole model. All anomalies with equivalent sources greater than approximately 1000 kg of iron were checked in the field, and the source of all but one identified as either a bridge, reinforced concrete debris, or a similarly benign object. Additionally, some smaller anomalies (equivalent sources of roughly 500 kg) have been checked; thus far, these also have innocuous sources. Airborne video proved invaluable in identifying logging equipment as the source of some of these anomalies. Geologic noise may account for some of the remaining anomalies. Naturally occurring accumulations of magnetic minerals in the soil on the ORR have been shown to produce anomalies which, at a sensor height of 30 m, are comparable to the anomaly produced by about 500 kg of iron. By comparison, the electronic noise of the magnetic gradiometer, 0.01--0.02 nT/m, is equivalent to only about 50--100 kg of iron at a 30 m sensor height. The electromagnetic data, combined with field mapping of karst structures, provided evidence of a northeast-southwest striking conduit spanning the parcel. The possible existence of a karst conduit led the EAS authors to conclude that this is a ``sensitive hydrologic setting.`` We conclude that aerial geophysics is an extremely cost-effective, and efficient technique for screening large tracts of land for environmental characterization.

  7. Airborne Multisensor Pod System (AMPS) data management overview

    SciTech Connect (OSTI)

    Wiberg, J.D.; Blough, D.K.; Daugherty, W.R.; Hucks, J.A.; Gerhardstein, L.H.; Meitzler, W.D.; Melton, R.B.; Shoemaker, S.V.

    1994-09-01T23:59:59.000Z

    An overview of the Data Management Plan for the Airborne Multisensor Pod System (AMPS) pro-grain is provided in this document. The Pacific Northwest Laboratory (PNL) has been assigned the responsibility of data management for the program, which includes defining procedures for data management and data quality assessment. Data management is defined as the process of planning, acquiring, organizing, qualifying and disseminating data. The AMPS program was established by the U.S. Department of Energy (DOE), Office of Arms Control and Non-Proliferation (DOE/AN) and is integrated into the overall DOE AN-10.1 technology development program. Sensors used for collecting the data were developed under the on-site inspection, effluence analysis, and standoff sensor program, the AMPS program interacts with other technology programs of DOE/NN-20. This research will be conducted by both government and private industry. AMPS is a research and development program, and it is not intended for operational deployment, although the sensors and techniques developed could be used in follow-on operational systems. For a complete description of the AMPS program, see {open_quotes}Airborne Multisensor Pod System (AMPS) Program Plan{close_quotes}. The primary purpose of the AMPS is to collect high-quality multisensor data to be used in data fusion research to reduce interpretation problems associated with data overload and to derive better information than can be derived from any single sensor. To collect the data for the program, three wing-mounted pods containing instruments with sensors for collecting data will be flight certified on a U.S. Navy RP-3A aircraft. Secondary objectives of the AMPS program are sensor development and technology demonstration. Pod system integrators and instrument developers will be interested in the performance of their deployed sensors and their supporting data acquisition equipment.

  8. Fast Proton Decay

    E-Print Network [OSTI]

    Tianjun Li; Dimitri V. Nanopoulos; Joel W. Walker

    2010-09-10T23:59:59.000Z

    We consider proton decay in the testable flipped SU(5) X U(1)_X models with TeV-scale vector-like particles which can be realized in free fermionic string constructions and F-theory model building. We significantly improve upon the determination of light threshold effects from prior studies, and perform a fresh calculation of the second loop for the process p \\to e^+ \\pi^0 from the heavy gauge boson exchange. The cumulative result is comparatively fast proton decay, with a majority of the most plausible parameter space within reach of the future Hyper-Kamiokande and DUSEL experiments. Because the TeV-scale vector-like particles can be produced at the LHC, we predict a strong correlation between the most exciting particle physics experiments of the coming decade.

  9. Double Beta Decay Experiments

    SciTech Connect (OSTI)

    Nanal, Vandana [Dept. of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai 400 005 (India)

    2011-11-23T23:59:59.000Z

    At present, neutrinoless double beta decay is perhaps the only experiment that can tell us whether the neutrino is a Dirac or a Majorana particle. Given the significance of the 0{nu}{beta}{beta}, there is a widespread interest for these rare event studies employing a variety of novel techniques. This paper describes the current status of DBD experiments. The Indian effort for an underground NDBD experiment at the upcoming INO laboratory is also presented.

  10. AIRBORNE, OPTICAL REMOTE SENSNG OF METHANE AND ETHANE FOR NATURAL GAS PIPELINE LEAK DETECTION

    SciTech Connect (OSTI)

    Jerry Myers

    2005-04-15T23:59:59.000Z

    Ophir Corporation was awarded a contract by the U. S. Department of Energy, National Energy Technology Laboratory under the Project Title ''Airborne, Optical Remote Sensing of Methane and Ethane for Natural Gas Pipeline Leak Detection'' on October 14, 2002. The scope of the work involved designing and developing an airborne, optical remote sensor capable of sensing methane and, if possible, ethane for the detection of natural gas pipeline leaks. Flight testing using a custom dual wavelength, high power fiber amplifier was initiated in February 2005. Ophir successfully demonstrated the airborne system, showing that it was capable of discerning small amounts of methane from a simulated pipeline leak. Leak rates as low as 150 standard cubic feet per hour (scf/h) were detected by the airborne sensor.

  11. Design and development of an airborne microwave radiometer for atmospheric sensing

    E-Print Network [OSTI]

    Scarito, Michael P

    2011-01-01T23:59:59.000Z

    Satellite-based passive microwave remote sensing is a valuable tool for global weather monitoring and prediction. This thesis presents the design and development of a low-cost airborne weather sensing instrument to ...

  12. The metal content of airborne particles in Edinburgh: application to epidemiological research 

    E-Print Network [OSTI]

    Hibbs, L R; Beverland, Iain J; Heal, Mathew R; Agius, Raymond M; Elton, Robert A; Fowler, D; Cape, Neil

    2002-01-01T23:59:59.000Z

    Metals are putative causative agents in the association between ill health and exposure to airborne particles. We present preliminary results from an epidemiological study using exposure metrics of metal contained in ...

  13. Modeling Plot-Level Biomass and Volume Using Airborne and Terrestrial Lidar Measurements

    E-Print Network [OSTI]

    Sheridan, Ryan D.

    2012-07-16T23:59:59.000Z

    The United States Forest Service (USFS) Forest Inventory and Analysis (FIA) program provides a diverse selection of data used to assess the status of the nation’s forested areas using sample locations dispersed throughout the country. Airborne...

  14. New Chemical Aerosol Characterization Methods- Examples Using Agricultural and Urban Airborne Particulate Matter

    E-Print Network [OSTI]

    Zhou, Lijun

    2010-10-12T23:59:59.000Z

    This study explored different chemical characterization methods of agricultural and urban airborne particulate matter. Three different field campaigns are discussed. For the agricultural aerosols, measurement of the chemical composition of size...

  15. Multisensor Fusion of Ground-based and Airborne Remote Sensing Data for Crop Condition Assessment

    E-Print Network [OSTI]

    Zhang, Huihui

    2012-02-14T23:59:59.000Z

    In this study, the performances of the optical sensors and instruments carried on both ground-based and airborne platforms were evaluated for monitoring crop growing status, detecting the vegetation response to aerial applied herbicides...

  16. Design of a small fast steering mirror for airborne and aerospace applications

    E-Print Network [OSTI]

    Boulet, Michael Thomas

    2008-01-01T23:59:59.000Z

    This thesis presents the analysis and design of a small advanced fast steering mirror (sAFSM) for airborne and aerospace platforms. The sAFSM provides feedback-controlled articulation of two rotational axes for precision ...

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

    E-Print Network [OSTI]

    Dr. A. Singmin

    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

  18. Radon backgrounds in the DRIFT-II directional dark matter experiments

    E-Print Network [OSTI]

    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

    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.

  19. Algorithms and Software Tools for Extracting Coastal Morphological Information from Airborne LiDAR Data

    E-Print Network [OSTI]

    Gao, Yige

    2010-07-14T23:59:59.000Z

    ALGORITHMS AND SOFTWARE TOOLS FOR EXTRACTING COASTAL MORPHOLOGICAL INFORMATION FROM AIRBORNE LiDAR DATA A Thesis by YIGE GAO Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE May 2009 Major Subject: Geography ALGORITHMS AND SOFTWARE TOOLS FOR EXTRACTING COASTAL MORPHOLOGICAL INFORMATION FROM AIRBORNE LiDAR DATA A Thesis by YIGE GAO...

  20. An investigation of three problems concerning the analysis of airborne asphalt fumes

    E-Print Network [OSTI]

    Laird, Larry Teal

    1981-01-01T23:59:59.000Z

    AN INVESTIGATION OF THREE PROBLEMS CONCERNING THE ANALYSIS OF AIRBORNE ASPHALT FUMES A Thesis by LARRY TEAL LAIRD Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE May 1981 Major Subject: Industrial Hygiene AN INVESTIGATION OF THREE PROBLEMS CONCERNING THE ANALYSIS OF AIRBORNE ASPHALT FUMES A Thesis by LARRY T. LAIRD Approved as to style and content by: (Chairm of Committee) (Head of Department...

  1. Effects of atmospheric parameters on radon measurements using alpha-track detectors

    SciTech Connect (OSTI)

    Zhao, C.; Zhuo, W., E-mail: whzhuo@fudan.edu.cn; Fan, D.; Yi, Y.; Chen, B. [Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai 200032 (China)] [Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai 200032 (China)

    2014-02-15T23:59:59.000Z

    The calibration factors of alpha-track radon detectors (ATDs) are essential for accurate determination of indoor radon concentrations. In this paper, the effects of atmospheric parameters on the calibration factors were theoretically studied and partially testified. Based on the atmospheric thermodynamics theory and detection characteristics of the allyl diglycol carbonate (CR-39), the calibration factors for 5 types of ATDs were calculated through Monte Carlo simulations under different atmospheric conditions. Simulation results showed that the calibration factor increased by up to 31% for the ATDs with a decrease of air pressure by 35.5 kPa (equivalent to an altitude increase of 3500 m), and it also increased by up to 12% with a temperature increase from 5?°C to 35?°C, but it was hardly affected by the relative humidity unless the water-vapor condensation occurs inside the detectors. Furthermore, it was also found that the effects on calibration factors also depended on the dimensions of ATDs. It indicated that variations of the calibration factor with air pressure and temperature should be considered for an accurate radon measurement with a large dimensional ATD, and water-vapor condensation inside the detector should be avoided in field measurements.

  2. Radon emanation from giant landslides of Koefels (Tyrol, Austria) and Langtang Himal (Nepal)

    SciTech Connect (OSTI)

    Purtscheller, F.; Pirchl, T.; Sieder, G. [Universitaet Innsbruck (Austria)] [and others

    1995-07-01T23:59:59.000Z

    The identification of extremely high indoor radon concentrations in the village Umhausen (Tyrol, Austria) initiated a scientific program to get information about the source and distribution of this noble gas. The high concentrations can not be related to U anomalies or large-scale fault zones. The nearby giant landslide of Koefels, with its highly fractured and crushed orthogneisses, are the only possible source of radon, despite the fact that the U and Ra content of the rocks is by no means exceptional. The reasons for the high emanation rates from the landslide are discussed and compared to results gained from a similar examination of the giant landslide of Langtang Himal (Nepal). The exceptional geologic situation in both cases, as well as the spatial distribution of different concentration levels, indicate that both landslides must be considered as the production sites of radon. Independent of the U and Ra contents of the rocks, the most important factors producing high emanation rates are the production of a high active surface area in circulation pathways for Rn-enriched soil air by brittle deformation due to the impact of the landslidemass. 37 refs., 4 figs., 1 tab.

  3. 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]

    Yu, K.N.

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

  4. Dark decay of Top quark

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Kong, Kyoungchui; Lee, Hye-Sung; Park, Myeonhun

    2014-04-01T23:59:59.000Z

    We suggest top quark decays as a venue to search for light dark force carriers. Top quark is the heaviest particle in the standard model whose decays are relatively poorly measured, allowing sufficient room for exotic decay modes from new physics. A very light (GeV scale) dark gauge boson (Z') is a recently highlighted hypothetical particle that can address some astrophysical anomalies as well as the 3.6 ? deviation in the muon g-2 measurement. We present and study a possible scenario that top quark decays as t ? b W + Z's. This is the same as the dominant topmore »quark decay (t ? b W) accompanied by one or multiple dark force carriers. The Z' can be easily boosted, and it can decay into highly collimated leptons (lepton-jet) with large branching ratio. We discuss the implications for the Large Hadron Collider experiments including the analysis based on the lepton-jets.« less

  5. Dark decay of Top quark

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Kong, Kyoungchui [Kansas; Lee, Hye-Sung [W&M, JLAB; Park, Myeonhun [Tokyo

    2014-04-01T23:59:59.000Z

    We suggest top quark decays as a venue to search for light dark force carriers. Top quark is the heaviest particle in the standard model whose decays are relatively poorly measured, allowing sufficient room for exotic decay modes from new physics. A very light (GeV scale) dark gauge boson (Z') is a recently highlighted hypothetical particle that can address some astrophysical anomalies as well as the 3.6 ? deviation in the muon g-2 measurement. We present and study a possible scenario that top quark decays as t ? b W + Z's. This is the same as the dominant top quark decay (t ? b W) accompanied by one or multiple dark force carriers. The Z' can be easily boosted, and it can decay into highly collimated leptons (lepton-jet) with large branching ratio. We discuss the implications for the Large Hadron Collider experiments including the analysis based on the lepton-jets.

  6. Radiative ?(1S) decays

    E-Print Network [OSTI]

    Baringer, Philip S.

    1990-03-01T23:59:59.000Z

    — wW~ ii~ ~ + v~ 1''&WV'' V 0.20 0.45 0.70 ~y ~ EBFA~ 0.95 l.20 FIG. 4. Energy spectrum (normalized to beam energy) for Y~y2(h+h ) event candidates, with continuum data and ex- pected background from Y~m 2(h +h ) overplotted. 40 30— ~ 20— LLI IO— hl...PHYSICAL REVIEW 0 VOLUME 41, NUMBER 5 Radiative T(lS) decays 1 MARCH 1990 R. Fulton, M. Hempstead, T. Jensen, D. R. Johnson, H. Kagan, R. Kass, F. Morrow, and J. Whitmore Ohio State University, Columbus, Ohio 43210 W.-Y. Chen, J. Dominick, R. L. Mc...

  7. Rare B Decays

    SciTech Connect (OSTI)

    Jackson, P.D.; /Victoria U.

    2006-02-24T23:59:59.000Z

    Recent results from Belle and BaBar on rare B decays involving flavor-changing neutral currents or purely leptonic final states are presented. Measurements of the CP asymmetries in B {yields} K*{gamma} and b {yields} s{gamma} are reported. Also reported are updated limits on B{sup +} {yields} K{sup +}{nu}{bar {nu}}, B{sup +} {yields} {tau}{sup +}{nu}, B{sup +} {yields} {mu}{sup +}{nu} and the recent measurement of B {yields} X{sub s}{ell}{sup +}{ell}{sup -}.

  8. 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)

    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

    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.

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

    SciTech Connect (OSTI)

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

    2011-07-01T23:59:59.000Z

    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)

  10. Airborne radioactive effluent study at the Savannah River Plant

    SciTech Connect (OSTI)

    Blanchard, R.L.; Broadway, J.A.; Sensintaffar, E.L.; Kirk, W.P.; Kahn, B.; Garrett, A.J.

    1984-07-01T23:59:59.000Z

    Under the Clean Air Act, Sections 112 and 122 as amended in 1977, the Office of Radiation Programs (OPR) of the United States Environmental Protection Agency is currently developing standards for radionuclides emitted to the air by several source categories. In order to confirm source-term measurements and pathway calculations for radiation exposures to humans offsite, the ORP performs field studies at selected facilities that emit radionuclides. This report describes the field study conducted at the Savannah River Plant (SRP), a laboratory operated by E.I. du Pont de Nemours and Company for the US Department of Energy. This purpose of the study at ARP was to verify reported airborne releases and resulting radiation doses from the facility. Measurements of radionuclide releases for brief periods were compared with measurements performed by SRP staff on split samples and with annual average releases reported by SRP for the same facilities. The dispersion model used by SRP staff to calculate radiation doses offsite was tested by brief environmental radioactivity measurements performed simultaneously with the release measurements, and by examining radioactivity levels in environmental samples. This report describes in detail all measurements made and data collected during the field study and presents the results obtained. 34 references, 18 figures, 49 tables.

  11. Design and calibration of the PHARUS polarimetric airborne SAR

    SciTech Connect (OSTI)

    Snoeij, P. [Delft Univ. of Technology, Delft (Netherlands); Hoogeboom, P.; Koomen, P.J. [and others

    1996-11-01T23:59:59.000Z

    The PHARUS system uses a phased array antenna with solid state amplifiers. The project consisted of two phases, a definition phase and a realization phase. The definition phase consisted of the actual realization of a SAR research system called PHARS, which made its first successful testflight in November 1990. The research system is based on the concept of a wide beamwidth antenna, rigidly fixed to the aircraft. Pulse compression and a high PRF ensure sufficient sensitivity in this system, which is equipped with a 160 Watt peak pulse power solid state transmitter. The processing is done off-line. In the realization phase the polarimetric PHARUS system has been developed. The design is based on the experience gained with the PHARS system. The system uses a phased array with dual polarized patch radiators and is equipped with solid state amplifiers. This paper will give an overview of the PHARUS design and operational use. Apart from the use as an advanced polarimetric airborne SAR, there is the perspective of using PHARUS as a demonstrator for ESA`s future ASAR system. 2 refs., 2 figs., 1 tab.

  12. NSAC Subcommittee Double Beta Decay

    E-Print Network [OSTI]

    and Lawrence Berkeley National Laboratory #12;2 Decay #12;2 0 0 Decay If 0 occurs then the neutrino is a Majorana particle and the neutrino and antiparticle are not distinct. Lepton number is not conserved! #12 30 ) Experimental Resolution #12;Higgs Boson, Majorana Mass and Lepton Number Conservation #12;LVD

  13. Particle decay in false vacuum

    SciTech Connect (OSTI)

    Gorsky, A.; Voloshin, M. B. [William I. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55455 (United States); Institute of Theoretical and Experimental Physics, Moscow, 117259 (Russian Federation)

    2006-01-15T23:59:59.000Z

    We revisit the problem of decay of a metastable vacuum induced by the presence of a particle. For the bosons of the 'master field' the problem is solved in any number of dimensions in terms of the spontaneous decay rate of the false vacuum, while for a fermion we find a closed expression for the decay rate in (1+1) dimensions. It is shown that in the (1+1) dimensional case an infrared problem of one-loop correction to the decay rate of a boson is resolved due to a cancellation between soft modes of the field. We also find the boson decay rate in the 'sine-Gordon staircase' model in the limits of strong and weak coupling.

  14. Particle decay in false vacuum

    E-Print Network [OSTI]

    A. Gorsky; M. B. Voloshin

    2005-11-08T23:59:59.000Z

    We revisit the problem of decay of a metastable vacuum induced by the presence of a particle. For the bosons of the `master field' the problem is solved in any number of dimensions in terms of the spontaneous decay rate of the false vacuum, while for a fermion we find a closed expression for the decay rate in (1+1) dimensions. It is shown that in the (1+1) dimensional case an infrared problem of one-loop correction to the decay rate of a boson is resolved due to a cancellation between soft modes of the field. We also find the boson decay rate in the `sine-Gordon staircase' model in the limits of strong and weak coupling.

  15. Search for neutrinoless decays of the ? lepton

    E-Print Network [OSTI]

    Baringer, Philip S.

    1990-02-01T23:59:59.000Z

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

  16. Proton Decay and the Planck Scale

    E-Print Network [OSTI]

    Larson, Daniel T.

    2009-01-01T23:59:59.000Z

    LBNL- 56556 PROTON DECAY AND THE PLANCK SCALE DANIEL T.ph/0410035v1 2 Oct 2004 PROTON DECAY AND THE PLANCK SCALE ?without grand uni?cation, proton decay can be a powerful

  17. $?$ Meson In $J/?$ Decays

    E-Print Network [OSTI]

    Wujun Huo; Xinmin Zhang; Tao Huang

    2002-03-20T23:59:59.000Z

    Recently BES at BEPC found evidence for the existence of the $\\sigma$ meson in the process of $J/\\Psi \\to \\sigma\\omega \\to\\pi\\pi\\omega$. In this paper we firstly discuss the relevant coupling $g_{\\sigma\\pi\\pi}$ and show that the linear $\\sigma$ model gives rise to a reasonable description of the $\\sigma$ decay into $\\pi$'s, then we calculate the coupling constant $g^{th}_{J/\\Psi\\sigma\\omega}$ by using the perturbative QCD technique and the light-cone wave functions of the $\\sigma$ and $\\omega$ mesons. The results show that the theoretical value of $g^{th}_{J/\\Psi\\sigma\\omega}$ is within the range of experimental value $g_{J/\\Psi\\sigma\\omega}$.

  18. Airborne flux measurements of Biogenic Isoprene over California

    SciTech Connect (OSTI)

    Misztal, P.; Karl, Thomas G.; Weber, Robin; Jonsson, H. H.; Guenther, Alex B.; Goldstein, Allen H.

    2014-10-10T23:59:59.000Z

    Biogenic Volatile Organic Compound (BVOC) fluxes were measured onboard the CIRPAS Twin Otter aircraft as part of the California Airborne BVOC Emission Research in Natural Ecosystem Transects (CABERNET) campaign during June 2011. The airborne virtual disjunct eddy covariance (AvDEC) approach used measurements from a PTR-MS and a wind radome probe to directly determine fluxes of isoprene, MVK+MAC, methanol, monoterpenes, and MBO over ~10,000-km of flight paths focusing on areas of California predicted to have the largest emissions of isoprene. The Fast Fourier Transform (FFT) approach was used to calculate fluxes over long transects of more than 15 km, most commonly between 50 and 150 km. The Continuous Wavelet Transformation (CWT) approach was used over the same transects to also calculate "instantaneous" fluxes with localization of both frequency and time independent of non-stationarities. Vertical flux divergence of isoprene is expected due to its relatively short lifetime and was measured directly using "racetrack" profiles at multiple altitudes. It was found to be linear and in the range 5% to 30% depending on the ratio of aircraft altitude to PBL height (z/zi). Fluxes were generally measured by flying consistently 1 at 400 m ±50 m (a.g.l.) altitude, and extrapolated to the surface according to the determined flux divergence. The wavelet-derived surface fluxes of isoprene averaged to 2 km spatial resolution showed good correspondence to Basal Emission Factor (BEF) landcover datasets used to drive biogenic VOC (BVOC) emission models. The surface flux of isoprene was close to zero over Central Valley crops and desert shrublands, but was very high (up to 15 mg m-2 h-1) above oak woodlands, with clear dependence of emissions on temperature and oak density. Isoprene concentrations of up to 8 ppb were observed at aircraft height on the hottest days and over the dominant source regions. While isoprene emissions from agricultural crop regions, shrublands, and coniferous forests were extremely low, high concentrations of methanol and monoterpenes were found above some of these regions. These observations demonstrate the ability to measure fluxes from specific sources by eddy covariance from an aircraft, and suggest the utility of measurements using fast response chemical sensors to constrain emission inventories and map out source distributions for a much broader array of trace gases than was observed in this study. This paper reports the first regional direct eddy covariance fluxes of isoprene. The emissions of VOCs measured from aircraft with 2 km spatial resolution can quantify the distribution of major sources providing the observations required for testing statewide emission inventories of these important trace gases. These measurements will be used in a future study to assess BVOC emission models and their driving variable datasets.

  19. Emissions of airborne toxics from coal-fired boilers: Mercury

    SciTech Connect (OSTI)

    Huang, H.S.; Livengood, C.D.; Zaromb, S.

    1991-09-01T23:59:59.000Z

    Concerns over emissions of hazardous air Pollutants (air toxics) have emerged as a major environmental issue, and the authority of the US Environmental Protection Agency to regulate such pollutants was greatly expanded through the Clean Air Act Amendments of 1990. Mercury has been singled out for particular attention because of concerns over possible effects of emissions on human health. This report evaluates available published information on the mercury content of coals mined in the United States, on mercury emitted in coal combustion, and on the efficacy of various environmental control technologies for controlling airborne emissions. Anthracite and bituminous coals have the highest mean-mercury concentrations, with subbituminous coals having the lowest. However, all coal types show very significant variations in mercury concentrations. Mercury emissions from coal combustion are not well-characterized, particularly with regard to determination of specific mercury compounds. Variations in emission rates of more than an order of magnitude have been reported for some boiler types. Data on the capture of mercury by environmental control technologies are available primarily for systems with electrostatic precipitators, where removals of approximately 20% to over 50% have been reported. Reported removals for wet flue-gas-desulfurization systems range between 35 and 95%, while spray-dryer/fabric-filter systems have given removals of 75 to 99% on municipal incinerators. In all cases, better data are needed before any definitive judgments can be made. This report briefly reviews several areas of research that may lead to improvements in mercury control for existing flue-gas-clean-up technologies and summarizes the status of techniques for measuring mercury emissions from combustion sources.

  20. On the injectivity of the circular Radon transform arising in thermoacoustic tomography

    E-Print Network [OSTI]

    Gaik Ambartsoumian; Peter Kuchment

    2004-12-25T23:59:59.000Z

    The circular Radon transform integrates a function over the set of all spheres with a given set of centers. The problem of injectivity of this transform (as well as inversion formulas, range descriptions, etc.) arises in many fields from approximation theory to integral geometry, to inverse problems for PDEs, and recently to newly developing types of tomography. The article discusses known and provides new results that one can obtain by methods that essentially involve only the finite speed of propagation and domain dependence for the wave equation.

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

    SciTech Connect (OSTI)

    Dixon, K; Mark Phifer, M

    2007-09-17T23:59:59.000Z

    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.

  2. Comparison of airborne and surface particulate size distributions in specific Hanford Nuclear Facilities

    SciTech Connect (OSTI)

    Ottley, D.B.

    1995-05-01T23:59:59.000Z

    Settled dust from nuclear operations may be contaminated with radionuclides and become resuspended and subsequently breathed. This is the predominate radionuclide inhalation hazard scenario in nuclear facilities that have been deactivated and no longer have liquid in their process systems that may become directly airborne in accident situations. Comparisons were made between indoor ambient airborne particulate size distribution and that of resuspended dust that could become contaminated and subsequently airborne during decommissioning operations at selected nuclear facilities on the Hanford Site. Results indicate that only 5% of the particles, by count, above the breathing zone are greater than ten (10) {mu}m in size and that the particulates that could be resuspended into the breathing zone had a mean aerodynamic equivalent diameter of four (4) {mu}m or less.

  3. Double beta decay: present status

    E-Print Network [OSTI]

    A. S. Barabash

    2008-07-18T23:59:59.000Z

    The present status of double beta decay experiments (including the search for $2\\beta^{+}$, EC$\\beta^{+}$ and ECEC processes) are reviewed. The results of the most sensitive experiments are discussed. Average and recommended half-life values for two-neutrino double beta decay are presented. Conservative upper limits on effective Majorana neutrino mass and the coupling constant of the Majoron to the neutrino are established as $ beta decay experiments with a sensitivity for the $$ at the level of (0.01-0.1) eV are considered.

  4. Wave Decay in MHD Turbulence

    E-Print Network [OSTI]

    Andrey Beresnyak; Alex Lazarian

    2008-05-06T23:59:59.000Z

    We present a model for nonlinear decay of the weak wave in three-dimensional incompressible magnetohydrodynamic (MHD) turbulence. We show that the decay rate is different for parallel and perpendicular waves. We provide a general formula for arbitrarily directed waves and discuss particular limiting cases known in the literature. We test our predictions with direct numerical simulations of wave decay in three-dimensional MHD turbulence, and discuss the influence of turbulent damping on the development of linear instabilities in the interstellar medium and on other important astrophysical processes.

  5. $D_s^+ \\to ??^+$ Decay

    E-Print Network [OSTI]

    E. El aaoud

    1998-01-08T23:59:59.000Z

    Motivated by the experimental measurement of the decay rate, $\\Gamma$, and the longitudinal polarization, $P_L$, in the Cabibbo favored decay $D_s^+\\to \\phi {\\rho}^{+}$, we have studied theoretical prediction within the context of factorization approximation invoking several form factors models. We were able to obtain agreement with experiment for both $\\Gamma$ and $P_L$ by using experimentally measured values of the form factors $A_1^{D_s\\phi}(0)$, $A_2^{D_s\\phi}(0)$ and $V^{D_s\\phi}(0)$ in the semi-leptonic decay $D_s^+\\to \\phi l^{+}\

  6. Neutrinoless Double Beta Decay Constraints

    E-Print Network [OSTI]

    Hiroaki Sugiyama

    2003-07-25T23:59:59.000Z

    A brief overview is given of theoretical analyses with neutrinoless double beta decay experiments. Theoretical bounds on the ``observable'', _betabeta, are presented. By using experimental bounds on _betabeta, allowed regions are obtained on the m_l-cos{2theta_12} plane, where m_l stands for the lightest neutrino mass. It is shown that Majorana neutrinos can be excluded by combining possible results of future neutrinoless double beta decay and {}^3H beta decay experiments. A possibility to constrain one of two Majorana phases is discussed also.

  7. Preliminary calculations on direct heating of a containment atmosphere by airborne core debris

    SciTech Connect (OSTI)

    Pilch, M.; Tarbell, W.W.

    1986-07-01T23:59:59.000Z

    Direct heating of the containment atmosphere by airborne core debris may be a significant source of containment pressurization in those accident sequences where the primary system is still at high pressure when the RPV fails. Vigorous blowdown of the primary system may result in nearly complete relocation of core debris out of the reactor cavity and possibly into the containment atmosphere where the liberation of thermal and chemical energy can directly heat the atmosphere. Rate independent and rate dependent models are developed and exercised parametrically to quantify the possible magnitude and rate of containment pressurization from direct heating. The possible mitigative effects of airborne water and subcompartment heating are also investigated.

  8. Computer code for double beta decay QRPA based calculations

    E-Print Network [OSTI]

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

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

  9. 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)

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

    1982-09-01T23:59:59.000Z

    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.

  10. Decoherence delays false vacuum decay

    E-Print Network [OSTI]

    Thomas C. Bachlechner

    2013-04-17T23:59:59.000Z

    We show that gravitational interactions between massless thermal modes and a nucleating Coleman-de Luccia bubble may lead to efficient decoherence and strongly suppress metastable vacuum decay for bubbles that are small compared to the Hubble radius. The vacuum decay rate including gravity and thermal photon interactions has the exponential scaling $\\Gamma\\sim\\Gamma_{CDL}^{2}$, where $\\Gamma_{CDL}$ is the Coleman-de Luccia decay rate neglecting photon interactions. For the lowest metastable initial state an efficient quantum Zeno effect occurs due to thermal radiation of temperatures as low as the de Sitter temperature. This strong decoherence effect is a consequence of gravitational interactions with light external mode. We argue that efficient decoherence does not occur for the case of Hawking-Moss decay. This observation is consistent with requirements set by Poincare recurrence in de Sitter space.

  11. The decay of hot nuclei

    SciTech Connect (OSTI)

    Moretto, L.G.; Wozniak, G.J.

    1988-11-01T23:59:59.000Z

    The formation of hot compound nuclei in intermediate-energy heavy ion reactions is discussed. The statistical decay of such compound nuclei is responsible for the abundant emission of complex fragments and high energy gamma rays. 43 refs., 23 figs.

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

    SciTech Connect (OSTI)

    Horton, T. R.

    1985-10-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

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

    1995-12-31T23:59:59.000Z

    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.

  14. Abstract--In this work, we first introduced a reorganized form of the Novikov's inversion formula for the attenuated Radon

    E-Print Network [OSTI]

    Abstract--In this work, we first introduced a reorganized form of the Novikov's inversion formula) applying the reorganized Novikov's formula. Numerical evaluations demonstrated its computational efficiency the attenuated Radon transform (AtRT). A closed- form inversion formula for parallel-beam (PB) geometry

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

    E-Print Network [OSTI]

    of Rn provides information useful in exploring for deeply buried uranium depositsThe Dispersion of Radon Above Deeply Buried Uranium Ore: Millennium Deposit, Athabasca Basin, SK M Sciences and Engineering Council of Canada CMIC-NSERC Exploration Footprints Research Network References

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

    SciTech Connect (OSTI)

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

    2009-01-01T23:59:59.000Z

    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.

  17. Neutrinoless Double Beta-Decay

    E-Print Network [OSTI]

    S. M. Bilenky

    2010-01-12T23:59:59.000Z

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

  18. Beta and gamma decays April 9, 2002

    E-Print Network [OSTI]

    Landstreet, John D.

    Beta and gamma decays April 9, 2002 1 Simple Fermi theory of beta decay ² Beta decay is one by the emission of a positive or negative beta particle (positron or electron). To ensure conservation of lepton emitted in beta decay is a continuum of energies, up to a maximum value, with most emitted betas having

  19. Signature of nonexponential nuclear decay

    E-Print Network [OSTI]

    A Ray; A K Sikdar; A De

    2015-03-18T23:59:59.000Z

    Precision tests of decay law of radioactive nuclei have not so far found any deviation from the exponential decay law at early time, as predicted by quantum mechanics. In this paper, we show that the quantum decoherence time (i.e. the timescale of nonexponential decay) of the quasifission or fission process should be of the order of attosecond considering the atom of the fissioning nucleus as a quantum detector. Hence, the observed decay timescale of the quasifission or fission process of even highly excited (EX greater than 50 MeV) transuranium and uraniumlike complexes should be rather long (of the order of attosecond) in spite of their very fast exponential decay timescale (of the order of zeptosecond) as measured by the nuclear techniques. Recent controversy regarding the observation of very long (of the order of attosecond ) and very short (of the order of zeptosecond ) quasifission or fission timescales for similar systems at similar excitation energies as obtained by direct techniques (crystal blocking, X ray fission fragment) and nuclear techniques could be interpreted as evidence for nonexponential decays in nuclear systems

  20. Savannah River Site Ingestion Pathway Methodology Manual for Airborne Radioactive Releases

    SciTech Connect (OSTI)

    Vincent, A.W. III

    2001-01-03T23:59:59.000Z

    This manual documents a recommended methodology for determining the ingestion pathway consequences of hypothetical accidental airborne radiological releases from facilities at the Savannah River Site. Both particulate and tritiated radioactive contaminants are addressed. Other approaches should be applied for evaluation of routine releases.

  1. DETECTION OF IMPULSE-LIKE AIRBORNE SOUND FOR DAMAGE IDENTIFICATION IN ROTOR BLADES OF WIND TURBINES

    E-Print Network [OSTI]

    Boyer, Edmond

    DETECTION OF IMPULSE-LIKE AIRBORNE SOUND FOR DAMAGE IDENTIFICATION IN ROTOR BLADES OF WIND TURBINES burdens of wind turbines. To detect damage of rotor blades, several research projects focus on an acoustic, rotor blade, wind turbine INTRODUCTION There are several publications of non destructive damage

  2. Speciation of Sb in airborne particulate matter, vehicle brake linings, and brake pad wear residues

    E-Print Network [OSTI]

    Short, Daniel

    Speciation of Sb in airborne particulate matter, vehicle brake linings, and brake pad wear residues: XAS XANES EXAFS Antimony Particulate matter Brake linings a b s t r a c t Insights into the speciation of Sb in samples of brake linings, brake pad wear residues, road dust, and atmospheric particulate

  3. LAAS Ionosphere Spatial Gradient Threat Model and Impact of LGF and Airborne Monitoring

    E-Print Network [OSTI]

    Stanford University

    LAAS Ionosphere Spatial Gradient Threat Model and Impact of LGF and Airborne Monitoring Ming Luo of users for the current Category I LAAS architecture. In the ionosphere threat model used by previous-case ionosphere conditions. In this paper, the ionosphere threat model is reexamined based on WAAS and IGS data

  4. 3-D airborne ultrasound synthetic aperture imaging based on capacitive micromachined ultrasonic transducers

    E-Print Network [OSTI]

    Khuri-Yakub, Butrus T. "Pierre"

    3-D airborne ultrasound synthetic aperture imaging based on capacitive micromachined ultrasonic was implemented by mechanical scanning a co-located transmitter and receiver using the classic synthetic aperture, silicone rubber, and foam plastics, in an attempt to overcome bad mechanical impedance matching between

  5. Effect of sampling height on the concentration of airborne fungal spores

    E-Print Network [OSTI]

    Levetin, Estelle

    and possible sources of air pollution.8 In addition, it is high enough to avoid vandalism and bothering aeroallergens. Airborne fungal spores are commonly collected from the outdoor air at the rooftop level of high respiration level (1.5 m above the ground) and at roof level (12 m height). Methods: Air samples were

  6. airborne gamma-ray spectrometer: Topics by E-print Network

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

    gamma-ray spectrometer 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 Digital Logarithmic Airborne...

  7. airborne gamma-ray surveying: Topics by E-print Network

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

    airborne gamma-ray surveying 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 Digital Logarithmic...

  8. airborne gamma-ray measurements: Topics by E-print Network

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

    airborne gamma-ray measurements 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 Digital Logarithmic...

  9. Elemental composition of airborne particulates in uranium mining and milling operations

    SciTech Connect (OSTI)

    Paschoa, A.S.; Wrenn, M.E.; Jones, K.W.; Cholewa, M.; Carvalho, S.M.

    1984-01-01T23:59:59.000Z

    Airborne particulates were collected through filters in occupational areas of the uranium mining and milling complex located in Pocos de Caldas, Brazil. The filters were analyzed by microPIXE (particle induced x-ray emission) combined with Rutherford Backscattering (RBS) of the incident protons. The results are discussed in the paper. 4 references, 6 figures, 1 table.

  10. Light transmittance in forest canopies determined using airborne laser altimetry and in-canopy quantum measurements

    E-Print Network [OSTI]

    Lefsky, Michael

    Light transmittance in forest canopies determined using airborne laser altimetry and in Abstract The vertical distribution of light transmittance was derived from field and laser altimeter-directed laser light than of direct solar radiation from typical elevation angles. Transects of light

  11. Measurement of airborne radioactivity from the Fukushima reactor accident in Tokushima, Japan

    E-Print Network [OSTI]

    Fushimi, K; Sakama, M; Sakaguchi, Y

    2011-01-01T23:59:59.000Z

    The airborne radioactive isotopes from the Fukushima Daiichi nuclear plant was measured in Tokushima, western Japan. The continuous monitoring has been carried out in Tokushima. From March 23, 2011 the fission product $^{131}$I was observed. The radioisotopes $^{134}$Cs and $^{137}$Cs were also observed in the beginning of April. However the densities were extremely smaller than the Japanese regulation of radioisotopes.

  12. Statistical Issues in the Study of Air Pollution Involving Airborne Particulate Matter

    E-Print Network [OSTI]

    Washington at Seattle, University of

    of the Workshop was to initiate a statistical research program relevant to setting air quality standardsStatistical Issues in the Study of Air Pollution Involving Airborne Particulate Matter Lawrence H. Cox NRCSET e c h n i c a l R e p o r t S e r i e s NRCSE-TRS No. 041 January 10, 2000 The NRCSEwas

  13. Measurement of airborne radioactivity from the Fukushima reactor accident in Tokushima, Japan

    E-Print Network [OSTI]

    K. Fushimi; S. Nakayama; M. Sakama; Y. Sakaguchi

    2012-10-19T23:59:59.000Z

    The airborne radioactive isotopes from the Fukushima Daiichi nuclear plan t was measured in Tokushima, western Japan. The continuous monitoring has been carried out in Tokushima. From March 23, 2011 the fission product $^{131}$I was observed. The radioisotopes $^{134}$Cs and $^{137}$Cs were also observed in the beginning of April. However the densities were extremely smaller than the Japanese regulation of radioisotopes.

  14. Airborne lead and other elements derived from local fires in the Himalayas

    SciTech Connect (OSTI)

    Davidson, C.I.; Grimm, T.C.; Nasta, M.A.

    1981-12-18T23:59:59.000Z

    The combustion of wood and yak dung for heating and cooking in a populated Nepal Himalayan valley contributes significantly to the ambient airborne concentrations of lead, copper, aluminum, magnesium, and elemental and organic carbon. A comparison of the concentrations of these elements in fresh snow with corresponding values in air suggests that the pollution aerosol is confined to the valley, with pristine air aloft.

  15. Signature of nonexponential nuclear decay

    E-Print Network [OSTI]

    Ray, A; De, A

    2015-01-01T23:59:59.000Z

    Precision tests of decay law of radioactive nuclei have not so far found any deviation from the exponential decay law at early time, as predicted by quantum mechanics. In this paper, we show that the quantum decoherence time (i.e. the timescale of nonexponential decay) of the quasifission or fission process should be of the order of attosecond considering the atom of the fissioning nucleus as a quantum detector. Hence, the observed decay timescale of the quasifission or fission process of even highly excited (EX greater than 50 MeV) transuranium and uraniumlike complexes should be rather long (of the order of attosecond) in spite of their very fast exponential decay timescale (of the order of zeptosecond) as measured by the nuclear techniques. Recent controversy regarding the observation of very long (of the order of attosecond ) and very short (of the order of zeptosecond ) quasifission or fission timescales for similar systems at similar excitation energies as obtained by direct techniques (crystal blocking...

  16. Thermodynamics of decaying vacuum cosmologies

    SciTech Connect (OSTI)

    Lima, J.A. [Physics Department, Brown University, Providence, Rhode Island 02912 (United States)] [Physics Department, Brown University, Providence, Rhode Island 02912 (United States); [Departamento de Fisica Teorica e Experimental, Universidade Federal do Rio Grande do Norte, 59072-970, Natal, RN (Brazil)

    1996-08-01T23:59:59.000Z

    The thermodynamic behavior of decaying vacuum cosmologies is investigated within a manifestly covariant formulation. Such a process corresponds to a continuous, irreversible energy flow from the vacuum component to the created matter constituents. It is shown that if the specific entropy per particle remains constant during the process, the equilibrium relations are preserved. In particular, if the vacuum decays into photons, the energy density {rho} and average number density of photons {ital n} scale with the temperature as {rho}{approximately}{ital T}{sup 4} and {ital n}{approximately}{ital T}{sup 3}. The temperature law is determined and a generalized Planckian-type form of the spectrum, which is preserved in the course of the evolution, is also proposed. Some consequences of these results for decaying vacuum FRW-type cosmologies as well as for models with {open_quote}{open_quote}adiabatic{close_quote}{close_quote} photon creation are discussed. {copyright} {ital 1996 The American Physical Society.}

  17. Neutrinoless Double Beta Decay Experiments

    E-Print Network [OSTI]

    Garfagnini, Alberto

    2014-01-01T23:59:59.000Z

    Neutrinoless double beta decay is the only process known so far able to test the neutrino intrinsic nature: its experimental observation would imply that the lepton number is violated by two units and prove that neutrinos have a Majorana mass components, being their own anti-particle. While several experiments searching for such a rare decay have been performed in the past, a new generation of experiments using different isotopes and techniques have recently released their results or are taking data and will provide new limits, should no signal be observed, in the next few years to come. The present contribution reviews the latest public results on double beta decay searches and gives an overview on the expected sensitivities of the experiments in construction which will be able to set stronger limits in the near future.

  18. Neutrinoless Double Beta Decay Experiments

    E-Print Network [OSTI]

    Alberto Garfagnini

    2014-08-11T23:59:59.000Z

    Neutrinoless double beta decay is the only process known so far able to test the neutrino intrinsic nature: its experimental observation would imply that the lepton number is violated by two units and prove that neutrinos have a Majorana mass components, being their own anti-particle. While several experiments searching for such a rare decay have been performed in the past, a new generation of experiments using different isotopes and techniques have recently released their results or are taking data and will provide new limits, should no signal be observed, in the next few years to come. The present contribution reviews the latest public results on double beta decay searches and gives an overview on the expected sensitivities of the experiments in construction which will be able to set stronger limits in the near future.

  19. Predicting Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    M. Hirsch; Ernest Ma; J. W. F. Valle; A. Villanova del Moral

    2005-07-12T23:59:59.000Z

    We give predictions for the neutrinoless double beta decay rate in a simple variant of the A_4 family symmetry model. We show that there is a lower bound for the neutrinoless double beta decay amplitude even in the case of normal hierarchical neutrino masses, corresponding to an effective mass parameter |m_{ee}| >= 0.17 \\sqrt{\\Delta m^2_{ATM}}. This result holds both for the CP conserving and CP violating cases. In the latter case we show explicitly that the lower bound on |m_{ee}| is sensitive to the value of the Majorana phase. We conclude therefore that in our scheme, neutrinoless double beta decay may be accessible to the next generation of high sensitivity experiments.

  20. Time evolution of cascade decay

    E-Print Network [OSTI]

    Daniel Boyanovsky; Louis Lello

    2014-06-25T23:59:59.000Z

    We study non-perturbatively the time evolution of cascade decay for generic fields $\\pi \\rightarrow \\phi_1\\phi_2\\rightarrow \\phi_2\\chi_1\\chi_2$ and obtain the time dependence of amplitudes and populations for the resonant and final states. We analyze in detail the different time scales and the manifestation of unitary time evolution in the dynamics of production and decay of resonant intermediate and final states. The probability of occupation (population) "flows" as a function of time from the initial to the final states. When the decay width of the parent particle $\\Gamma_\\pi$ is much larger than that of the intermediate resonant state $\\Gamma_{\\phi_1}$ there is a "bottleneck" in the flow, the population of resonant states builds up to a maximum at $t^* = \\ln[\\Gamma_\\pi/\\Gamma_{\\phi_1}]/(\\Gamma_\\pi-\\Gamma_{\\phi_1})$ nearly saturating unitarity and decays to the final state on the longer time scale $1/\\Gamma_{\\phi_1}$. As a consequence of the wide separation of time scales in this case the cascade decay can be interpreted as evolving sequentially $\\pi \\rightarrow \\phi_1\\phi_2; ~ \\phi_1\\phi_2\\rightarrow \\phi_2\\chi_1\\chi_2$. In the opposite limit the population of resonances ($\\phi_1$) does not build up substantially and the cascade decay proceeds almost directly from the initial parent to the final state without resulting in a large amplitude of the resonant state. An alternative but equivalent non-perturbative method useful in cosmology is presented. Possible phenomenological implications for heavy sterile neutrinos as resonant states and consequences of quantum entanglement and correlations in the final state are discussed.

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

    E-Print Network [OSTI]

    Ely, Gregory

    2013-01-01T23:59:59.000Z

    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.

  2. What can we learn from neutrinoless double beta decay experiments?

    E-Print Network [OSTI]

    Bahcall, John N.

    2009-01-01T23:59:59.000Z

    Limits From Neutrinoless Double-Beta Decay (Rev. ),” ina next generation neutrinoless double beta decay search andPARTICLES? NO NEUTRINOLESS DOUBLE BETA DECAY AND INVERTED

  3. Fuzzy logic approach to supervised segmentation of forest regions infested by Southern Pine Beetle using color airborne images

    E-Print Network [OSTI]

    Ng, Kit-Tong

    1994-01-01T23:59:59.000Z

    Digital image processing technique and fuzzy logic approach are used to identify forest areas infested with Southern Pine Beetle, SPB, using normal color airborne imageries in this research. This research will be used as a front end of a larger...

  4. A fast-time study on increasing the capacity of continuous descent approaches through airborne precision spacing

    E-Print Network [OSTI]

    Weitz, Lesley Anne

    2005-11-01T23:59:59.000Z

    Research Center (LaRC) in Hampton, Virginia, two parallel research efforts have focusedon terminal area research: one is Airborne Precision Spacing (APS), and the other is the Quiet Aircraft Technologies (QAT) project. The APS objective is to increase...

  5. Method for the assessment of airborne off-target pesticide spray concentrations due to aircraft wing-tip vortex

    E-Print Network [OSTI]

    Oliva, Sergio Eduardo

    2003-01-01T23:59:59.000Z

    The purpose of this thesis is to develop a method for assessing airborne concentrations caused by off-target pesticide drift. Concentrations are bounded by the worst credible circumstances within a normal aircraft pesticide spraying. It is assumed...

  6. Airborne and ground based measurements of volatile organic compounds using proton transfer reaction mass spectrometry in Texas and Mexico City

    E-Print Network [OSTI]

    Fortner, Edward Charles

    2009-05-15T23:59:59.000Z

    Measurements of ambient volatile organic compounds (VOCs) by proton transfer reaction mass spectrometry (PTR-MS) are reported from recent airborne and surface based field campaigns. The Southeast Texas Tetroon Study (SETTS) was a project within...

  7. Experimental use of airborne sensors in the measurement of Mississippi River outflow into the Gulf of Mexico

    E-Print Network [OSTI]

    Walsh, Don

    1967-01-01T23:59:59.000Z

    ~ZNENTAL USE OP AIRBORNE SENSORS IN THE MEASUREMBNZ OP MISSISSIPPI RIVER OUTPLO? INTO THE GULP OP I'IEXICO DON 'WAKEN Lieutenant Commander U ~ ST Navy Submitted to the Graduate College of the Texas ASM University in partial fulfillment... . . . . , . , 39 2 Freight-data--handling - -o- ~ . . ----. ------58 Vo. -ARQZSXS OP. RBSULTS o -~ ~ ~ o ~ o '~ o=. oo ~ ? o =-'- 63 Airborne Sensor Evaluation , . . . . . . 63 l. Xnfrared Xmagery o . . . . '. . ~ , 63 Ultraviolet Imagery ~ ~ . o ' 65 3. Aerial...

  8. An investigation of sea surface temperature patterns in the Gulf of Mexico as determined by an airborne infrared sensor

    E-Print Network [OSTI]

    Drennan, Kirby Lee

    1967-01-01T23:59:59.000Z

    AN INVESTIGATION OF SEA SURFACE TF"PERATURE PATTERNS IN THE GULF OF IKXICO AS DETERMINED BY AN AIRBORNE INFRARED SENSOR A Thesis by KIRBY IEE DRENNAN Submitted to the Graduate College of the Texas API University in partial tulfillment... of the requirements for the degree of 14IASTER OF SCIENCE August 1967 Physical Oceanography AN INVESTIGATION OF SEA SURFACE TEMPERATURE PATIERNS IN THE GULF OF MEXICO AS DETERMINED BY AN AIRBORNE INFRARED SENSOR A Thesis by KIRBY LEE DRENNAN Approved...

  9. Beta decay of Ga-62 

    E-Print Network [OSTI]

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

    2003-01-01T23:59:59.000Z

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

  10. Constraining neutrinoless double beta decay

    E-Print Network [OSTI]

    L. Dorame; D. Meloni; S. Morisi; E. Peinado; J. W. F. Valle

    2011-11-23T23:59:59.000Z

    A class of discrete flavor-symmetry-based models predicts constrained neutrino mass matrix schemes that lead to specific neutrino mass sum-rules (MSR). We show how these theories may constrain the absolute scale of neutrino mass, leading in most of the cases to a lower bound on the neutrinoless double beta decay effective amplitude.

  11. Beta decay of Ga-62

    E-Print Network [OSTI]

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

    2003-01-01T23:59:59.000Z

    from the ex- perimental ft value for a 01?01 b decay between analog states with the relation @3# 0556-2813/2003/68~1!/015501~6!/$20.00 68 015501- of 62Ga . Hardy, V. E. Mayes, R. G. Neilson, M. Sanchez-Vega, and R. E. Tribble y, College Station...

  12. Rare decays at the Tevatron

    SciTech Connect (OSTI)

    Farrington, S.M.; /Liverpool U.

    2006-01-01T23:59:59.000Z

    The confidence level limits of the CDF and D0 searches for the B{sub s}{sup 0}, B{sub d}{sup 0} {yields} {mu}{sup +}{mu}{sup -} and B{sub s}{sup 0} {yields} {mu}{sup +}{mu}{sup -}{phi} rare decays are presented.

  13. Proton decay matrix elements from lattice QCD 

    E-Print Network [OSTI]

    Cooney, Paul

    2010-01-01T23:59:59.000Z

    We present results for the matrix elements relevant for proton decay in Grand Unified Theories (GUTs), using two methods. In the indirect method, we rely on an effective field theory description of proton decay, where ...

  14. Radiative Penguin Decays at the B Factories

    SciTech Connect (OSTI)

    Cuhadar-Donszelmann, T.; /British Columbia U.

    2007-03-05T23:59:59.000Z

    Recent results from the B-Factories on radiative decays such as b {yields} s(d){gamma}, b {yields} s{ell}{ell} and leptonic decay B{sup 0} {yields} {tau}{sup +}{tau}{sup -} are reviewed.

  15. New Physics from NSIs in charm Decays

    E-Print Network [OSTI]

    Shakeel Mahmood; Farida Tahir; Azeem Mir

    2014-11-04T23:59:59.000Z

    We study rare decays of Charm in NSIs. We calculate the NSIs Branching ratios of these decays. There is a strong dependence of these on new physics parameter. They provide, stringent constraints on free parameter in tau.

  16. Apparatus for real-time airborne particulate radionuclide collection and analysis

    DOE Patents [OSTI]

    Smart, John E. (West Richland, WA); Perkins, Richard W. (Richland, WA)

    2001-01-01T23:59:59.000Z

    An improved apparatus for collecting and analyzing an airborne particulate radionuclide having a filter mounted in a housing, the housing having an air inlet upstream of the filter and an air outlet downstream of the filter, wherein an air stream flows therethrough. The air inlet receives the air stream, the filter collects the airborne particulate radionuclide and permits a filtered air stream to pass through the air outlet. The improvement which permits real time counting is a gamma detecting germanium diode mounted downstream of the filter in the filtered air stream. The gamma detecting germanium diode is spaced apart from a downstream side of the filter a minimum distance for a substantially maximum counting detection while permitting substantially free air flow through the filter and uniform particulate radionuclide deposition on the filter.

  17. A model for forming airborne synthetic aperture radar images of underground targets

    SciTech Connect (OSTI)

    Doerry, A.W.

    1994-01-01T23:59:59.000Z

    Synthetic Aperture Radar (SAR) from an airborne platform has been proposed for imaging targets beneath the earth`s surface. The propagation of the radar`s energy within the ground, however, is much different than in the earth`s atmosphere. The result is signal refraction, echo delay, propagation losses, dispersion, and volumetric scattering. These all combine to make SAR image formation from an airborne platform much more challenging than a surface imaging counterpart. This report treats the ground as a lossy dispersive half-space, and presents a model for the radar echo based on measurable parameters. The model is then used to explore various imaging schemes, and image properties. Dynamic range is discussed, as is the impact of loss on dynamic range. Modified window functions are proposed to mitigate effects of sidelobes of shallow targets overwhelming deeper targets.

  18. Measurement of airborne fission products in Chapel Hill, NC, USA from the Fukushima I reactor accident

    E-Print Network [OSTI]

    MacMullin, S; Green, M P; Henning, R; Holmes, R; Vorren, K; Wilkerson, J F

    2011-01-01T23:59:59.000Z

    We present measurements of airborne fission products in Chapel Hill, NC, USA, from 62 days following the March 11, 2011, accident at the Fukushima I Nuclear Power Plant. Airborne particle samples were collected daily in air filters and radio-assayed with two high-purity germanium (HPGe) detectors. The fission products I-131 and Cs-137 were measured with maximum activities of 4.2 +/- 0.6 mBq/m^2 and 0.42 +/- 0.07 mBq/m^2 respectively. Additional activity from I-131, I-132, Cs-134, Cs-136, Cs-137 and Te-132 were measured in the same air filters using a low-background HPGe detector at the Kimballton Underground Research Facility (KURF).

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

    E-Print Network [OSTI]

    B. Pritychenko

    2015-03-11T23:59:59.000Z

    The precision of double-beta ($\\beta\\beta$) decay experimental half-lives and their uncertainties is reevaluated. A complementary analysis of the decay uncertainties indicates deficiencies due to small size of statistical samples, and incomplete collection of experimental information. Further experimental and theoretical efforts would lead toward more precise values of $\\beta\\beta$-decay half-lives and nuclear matrix elements.

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

    E-Print Network [OSTI]

    B. Pritychenko

    2015-01-09T23:59:59.000Z

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

  1. Light-Quark Decays in Heavy Hadrons

    E-Print Network [OSTI]

    Faller, Sven

    2015-01-01T23:59:59.000Z

    We consider weak decays of heavy hadrons (bottom and charmed) where the heavy quark acts as a spectator. Theses decays are heavily phase-space suppressed but may become experimentally accessible in the near future. These decays are interesting as a QCD laboratory to study the behaviour of the light quarks in the colour-background field of the heavy spectator.

  2. Double beta decay: experiments and theory review

    E-Print Network [OSTI]

    A. Nucciotti

    2007-07-28T23:59:59.000Z

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

  3. Device and method for accurately measuring concentrations of airborne transuranic isotopes

    DOE Patents [OSTI]

    McIsaac, C.V.; Killian, E.W.; Grafwallner, E.G.; Kynaston, R.L.; Johnson, L.O.; Randolph, P.D.

    1996-09-03T23:59:59.000Z

    An alpha continuous air monitor (CAM) with two silicon alpha detectors and three sample collection filters is described. This alpha CAM design provides continuous sampling and also measures the cumulative transuranic (TRU), i.e., plutonium and americium, activity on the filter, and thus provides a more accurate measurement of airborne TRU concentrations than can be accomplished using a single fixed sample collection filter and a single silicon alpha detector. 7 figs.

  4. AIRBORNE, OPTICAL REMOTE SENSING OF METHANE AND ETHANE FOR NATURAL GAS PIPELINE LEAK DETECTION

    SciTech Connect (OSTI)

    Jerry Myers

    2003-11-12T23:59:59.000Z

    Ophir Corporation was awarded a contract by the U. S. Department of Energy, National Energy Technology Laboratory under the Project Title ''Airborne, Optical Remote Sensing of Methane and Ethane for Natural Gas Pipeline Leak Detection'' on October 14, 2002. This second six-month technical report summarizes the progress made towards defining, designing, and developing the hardware and software segments of the airborne, optical remote methane and ethane sensor. The most challenging task to date has been to identify a vendor capable of designing and developing a light source with the appropriate output wavelength and power. This report will document the work that has been done to identify design requirements, and potential vendors for the light source. Significant progress has also been made in characterizing the amount of light return available from a remote target at various distances from the light source. A great deal of time has been spent conducting laboratory and long-optical path target reflectance measurements. This is important since it helps to establish the overall optical output requirements for the sensor. It also reduces the relative uncertainty and risk associated with developing a custom light source. The data gathered from the optical path testing has been translated to the airborne transceiver design in such areas as: fiber coupling, optical detector selection, gas filters, and software analysis. Ophir will next, summarize the design progress of the transceiver hardware and software development. Finally, Ophir will discuss remaining project issues that may impact the success of the project.

  5. Gamma-analysis of airborne particulates sampled in Youzhno-Sakhalinsk town at March - April 2011

    E-Print Network [OSTI]

    E. G. Tertyshnik; V. P. Martynenko; F. A. Andreev; G. B. Artemyev

    2012-03-22T23:59:59.000Z

    The experience of discovery of the radioactive products which have released into atmosphere of Sakhalin region from Fukushima Daiichi accident is presented. Sampling of airborne particulates and atmosphere fallout was carried out by means of the air ventilation set and horizontal gauze planchs, respectively. The HPGe detector was used for gamma analyses of the airborne samples. Since 23 March we confidently measured 131I in the airborne samples, after 03.04.2011 we also registered a rise of activity 137Cs and 134Cs. 132Te and 132I were discovered in ashen sample of the planch, which had exposed in Youzhno-Kurilk from 14 to 17 March. The effect of the pairs production when in the samples 208Tl presence, which emits gamma-quanta of 2615 keV, causes a rise in apparatus spectra of the peak corresponding to energy 1593 keV, which could be in error ascribed to 140La. It had been experimentally shown that the systematic reduction of 134Cs content in measuring samples due to effect of gamma - gamma coincidence did not exceed 7 % (for the detector and geometry of the measurement used).

  6. AIRBORNE, OPTICAL REMOTE SENSING OF METHANE AND ETHANE FOR NATURAL GAS PIPLINE LEAK DETECTION

    SciTech Connect (OSTI)

    Jerry Myers

    2004-05-12T23:59:59.000Z

    Ophir Corporation was awarded a contract by the U. S. Department of Energy, National Energy Technology Laboratory under the Project Title ''Airborne, Optical Remote Sensing of Methane and Ethane for Natural Gas Pipeline Leak Detection'' on October 14, 2002. The third six-month technical report contains a summary of the progress made towards finalizing the design and assembling the airborne, remote methane and ethane sensor. The vendor has been chosen and is on contract to develop the light source with the appropriate linewidth and spectral shape to best utilize the Ophir gas correlation software. Ophir has expanded upon the target reflectance testing begun in the previous performance period by replacing the experimental receiving optics with the proposed airborne large aperture telescope, which is theoretically capable of capturing many times more signal return. The data gathered from these tests has shown the importance of optimizing the fiber optic receiving fiber to the receiving optic and has helped Ophir to optimize the design of the gas cells and narrowband optical filters. Finally, Ophir will discuss remaining project issues that may impact the success of the project.

  7. Dalitz plot studies in hadronic charm decays

    E-Print Network [OSTI]

    Leonard Lesniak

    2014-11-06T23:59:59.000Z

    Recent studies of hadronic -meson decays are reported. Some experimental searches of CP-symmetry violation using model independent methods are presented. An importance of unitarity constraints in construction of phenomenological models of the D-meson decays is underlined. The theoretical model of the D0 --> K0S pi+ pi- decays, including some two-body unitarity constraints, is described. Then a comparison of the model results with the Belle collaboration data is made. The results on the CP-violation in the D0 --> K0S pi+ pi- decays are given and the necessity to consider the CP-violation in the subsequent K0S decays is emphasized.

  8. Neutralino dark matter from heavy axino decay

    SciTech Connect (OSTI)

    Choi, Ki-Young [Departamento de Fisica Teorica C-XI, Universidad Autonoma de Madrid, Cantoblanco, 28049 Madrid (Spain); Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, Cantoblanco, 28049 Madrid (Spain); Kim, Jihn E. [Department of Physics and Astronomy, Seoul National University, Seoul 151-747 (Korea, Republic of); Lee, Hyun Min [Department of Physics, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213 (United States); Seto, Osamu [Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, Cantoblanco, 28049 Madrid (Spain)

    2008-06-15T23:59:59.000Z

    We consider cosmological consequences of a heavy axino, decaying to the neutralino in R-parity conserving models. The importance and influence of the axino decay on the resultant abundance of neutralino dark matter depends on the lifetime and the energy density of axino. For a high reheating temperature after inflation, copiously produced axinos dominate the energy density of the universe, and its decay produces a large amount of entropy. As a bonus, we obtain that the upper bound on the reheating temperature after inflation via gravitino decay can be moderated, because the entropy production by the axino decay more or less dilutes the gravitinos.

  9. SIZE DISTRIBUTION AND RATE OF PRODUCTION OF AIRBORNE PARTICULATE MATTER GENERATED DURING METAL CUTTING

    SciTech Connect (OSTI)

    M.A. Ebadian, Ph.D.; S.K. Dua, Ph.D., C.H.P.; Hillol Guha, Ph.D.

    2001-01-01T23:59:59.000Z

    During deactivation and decommissioning activities, thermal cutting tools, such as plasma torch, laser, and gasoline torch, are used to cut metals. These activities generate fumes, smoke and particulates. These airborne species of matter, called aerosols, may be inhaled if suitable respiratory protection is not used. Inhalation of the airborne metallic aerosols has been reported to cause ill health effects, such as acute respiratory syndrome and chromosome damage in lymphocytes. In the nuclear industry, metals may be contaminated with radioactive materials. Cutting these metals, as in size reduction of gloveboxes and tanks, produces high concentrations of airborne transuranic particles. Particles of the respirable size range (size < 10 {micro}m) deposit in various compartments of the respiratory tract, the fraction and the site in the respiratory tract depending on the size of the particles. The dose delivered to the respiratory tract depends on the size distribution of the airborne particulates (aerosols) and their concentration and radioactivity/toxicity. The concentration of airborne particulate matter in an environment is dependent upon the rate of their production and the ventilation rate. Thus, measuring aerosol size distribution and generation rate is important for (1) the assessment of inhalation exposures of workers, (2) the selection of respiratory protection equipment, and (3) the design of appropriate filtration systems. Size distribution of the aerosols generated during cutting of different metals by plasma torch was measured. Cutting rates of different metals, rate of generation of respirable mass, as well as the fraction of the released kerf that become respirable were determined. This report presents results of these studies. Measurements of the particles generated during cutting of metal plates with a plasma arc torch revealed the presence of particles with mass median aerodynamic diameters of particles close to 0.2 {micro}m, arising from condensation of vaporized material and subsequent rapid formation of aggregates. Particles of larger size, resulting from ejection of melted material or fragments from the cutting zone, were also observed. This study presents data regarding the metal cutting rate, particle size distribution, and their generation rate, while using different cutting tools and metals. The study shows that respirable particles constitute only a small fraction of the released kerf.

  10. International decay data evaluation project

    SciTech Connect (OSTI)

    Helmer, R.G.

    1996-10-01T23:59:59.000Z

    Basic concepts of, and information from, radionuclide decay are used in many applications. The author limits this discussion to the data needed for applied {gamma}-ray spectrometry; this includes applications such as nuclide identification and quantitative assay. Many of these applications require a knowledge of half-lives and radiation energies and emission probabilities. For over 50 years, people have compiled and evaluated measured data with the goal of obtaining the best values of these quantities. This has resulted in numerous sets of recommended values, many of which still have scientific, historical, or national reasons for existing. These sets show varying degrees of agreement and disagreement in the quoted values and varying time lags in incorporating new and improved experimental results. A new informational international group has been formed to carry out evaluations for radionuclides of importance in applications; it is expected that the results will become an authoritative and widely accepted set of decay data.

  11. $\\tau$ decays with neutral kaons

    E-Print Network [OSTI]

    Abbiendi, G; Ĺkesson, 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; Betts, S; Biebel, O; Biguzzi, A; Bloodworth, Ian J; Bock, P; Böhme, J; Boeriu, O; Bonacorsi, D; Boutemeur, M; Braibant, S; Bright-Thomas, P G; Brigliadori, L; Brown, R M; Burckhart, Helfried 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; Conboy, J E; 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; Fürtjes, 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; Gruwé, M; Hajdu, C; Hanson, G G; Hansroul, M; Hapke, M; Harder, K; Harel, A; Hargrove, C K; Harin-Dirac, M; Hauschild, M; Hawkes, C M; Hawkings, R; Hemingway, Richard J; Herten, G; Heuer, R D; Hildreth, M D; Hill, J C; Hobson, P R; Höcker, Andreas; Hoffman, K; Homer, R James; Honma, A K; Horváth, D; Hossain, K R; Howard, R; Hüntemeyer, 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; Kühl, T; Kupper, M; Kyberd, P; Lafferty, G D; Landsman, Hagar Yaël; Lanske, D; Lauber, J; Lawson, I; Layter, J G; 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; Lü, J; Ludwig, J; Macchiolo, A; MacPherson, A L; Mader, W F; Mannelli, M; Marcellini, S; Marchant, T E; Martin, A J; Martin, J P; Martínez, G; Mashimo, T; Mättig, P; McDonald, W J; McKenna, J A; McKigney, E A; McMahon, T J; McPherson, R A; Meijers, F; Méndez-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; Ögren, H O; Okpara, A N; Oreglia, M J; Orito, S; Pásztor, G; Pater, J R; Patrick, G N; Patt, J; Pérez-Ochoa, R; Petzold, S; 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; Runólfsson, 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; Schöning, A; Schröder, 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; Söldner-Rembold, S; Spagnolo, S; Sproston, M; Stahl, A; Stephens, K; Stoll, K; Strom, D; Ströhmer, R; Surrow, B; Talbot, S D; Taras, P; Tarem, S; Teuscher, R; Thiergen, M; Thomas, J; Thomson, M A; Torrence, E; Towers, S; Trefzger, T M; Trigger, I; Trócsányi, Z L; Tsur, E; Turner-Watson, M F; Ueda, I; Van Kooten, R; Vannerem, P; Verzocchi, M; Voss, H; Wäckerle, F; 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

    2000-01-01T23:59:59.000Z

    The branching ratio of the tau lepton to a neutral K meson is measured from a sample of approximately 200,000 tau decays recorded by the OPAL detector at centre-of-mass energies near the Z0 resonance. The measurement is based on two samples which identify one-prong tau decays with KL and KS mesons. The combined branching ratios are measured to be B(tau- -->pi- K0bar nutau) = (9.33+-0.68+-0.49)x10^-3 B(tau- -->pi- K0bar [>=1pi0] nutau) = (3.24+-0.74+-0.66)x10^-3 B(tau- -->K- K0bar [>=0pi0] nutau) = (3.30+-0.55+-0.39)x10^-3 where the first error is statistical and the second systematic.

  12. Speeding-up Thorium decay

    E-Print Network [OSTI]

    F. Cardone; R. Mignani; A. Petrucci

    2007-10-26T23:59:59.000Z

    We show that cavitation of a solution of thorium-228 in water induces its transformation at a rate 10000 times faster than the natural radioactive decay would do. This result agrees with the alteration of the secular equilibrium of thorium-234 obtained by a Russian team via explosion of titanium foils in water and solutions. These evidences further support some preliminary clues for the possibility of piezonuclear reactions (namely nuclear reactions induced by pressure waves) obtained in the last ten years.

  13. Autoresonant soliton and decay pumping

    E-Print Network [OSTI]

    O. M. Kiselev

    2013-01-29T23:59:59.000Z

    The primary resonance equation in partial derivatives with external force and slowly varying frequency is derived. The leading-order term of asymptotic solution is constructed as a soliton with growing amplitude when time is large. This growing solution is obtained due to the decaying amplitude of the external force. A necessary condition for the growth of the solution in dissipative media is obtained also.

  14. 3/14/09 10:47 AMIs that granite counter in your home emitting radon? Page 1 of 4http://www.startribune.com/41239912.html?page=4&c=y

    E-Print Network [OSTI]

    Llope, William J.

    3/14/09 10:47 AMIs that granite counter in your home emitting radon? Page 1 of 4http://www.startribune.com/41239912.html?page=4&c=y Advertisement Is that granite counter in your home emitting radon? Homeowners seeking just the right granite for their countertops have something new to ponder, besides which color

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

    E-Print Network [OSTI]

    is the contamination of sensitive surfaces of experimental apparata with the radioactive decay products of 222Rn . What

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

    SciTech Connect (OSTI)

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

    1982-04-01T23:59:59.000Z

    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.

  17. Dark Decay of the Top Quark

    SciTech Connect (OSTI)

    Kong, Kyoungchul; Lee, Hye-Sung; Park, Myeonghun

    2014-04-01T23:59:59.000Z

    We suggest top quark decays as a venue to search for light dark force carriers. The top quark is the heaviest particle in the standard model whose decays are relatively poorly measured, allowing sufficient room for exotic decay modes from new physics. A very light (GeV scale) dark gauge boson (Z') is a recently highlighted hypothetical particle that can address some astrophysical anomalies as well as the 3.6sigma deviation in the muon g-2 measurement. We present and study a possible scenario that top quark decays as t-->bW+Z's. This is the same as the dominant top quark decay (t-->bW) accompanied by one or multiple dark force carriers. The Z' can be easily boosted, and it can decay into highly collimated leptons (lepton-jet) with large branching ratio. We discuss the implications for the Large Hadron Collider experiments including the analysis based on the lepton-jets.

  18. Electroweak penguin decays at LHCb

    E-Print Network [OSTI]

    Thomas Blake

    2011-09-29T23:59:59.000Z

    Promising ways to search for New Physics effects in radiative penguin decays are in the angular analysis of $B_{d} \\rightarrow K^{*0} \\mu^{+}\\mu^{-}$, in the measurement of direct CP violation in $\\B_{d} \\rightarrow K^{*0}\\mu^{+}\\mu^{-}$ and a time dependent analysis of $B_{s} \\rightarrow \\phi \\gamma$. All of these studies are being pursued at LHCb. First results will be shown from the 2010 and early 2011 data, with particular emphasis on $B_{d} \\rightarrow K^{*0} \\mu^{+}\\mu^{-}$.

  19. Neutrinoless double beta decay experiments

    E-Print Network [OSTI]

    K. Zuber

    2006-10-04T23:59:59.000Z

    The study of neutrinoless double beta decay is of outmost importance for neutrino physics. It is considered to be the gold plated channel to probe the fundamental character of neutrinos and to determine the neutrino mass. From the experimental point about nine different isotopes are explored for the search. After a general introduction follows a short discussion on nuclear matrix element calculations and supportive measurements. The current experimental status of double beta searches is presented followed by a short discussion of the ideas and proposals for large scale experiments.

  20. AIRBORNE, OPTICAL REMOTE SENSING OF METHANE AND ETHANE FOR NATURAL GAS PIPELINE LEAK DETECTION

    SciTech Connect (OSTI)

    Jerry Myers

    2003-05-13T23:59:59.000Z

    Ophir Corporation was awarded a contract by the U. S. Department of Energy, National Energy Technology Laboratory under the Project Title ''Airborne, Optical Remote Sensing of Methane and Ethane for Natural Gas Pipeline Leak Detection'' on October 14, 2002. This six-month technical report summarizes the progress for each of the proposed tasks, discusses project concerns, and outlines near-term goals. Ophir has completed a data survey of two major natural gas pipeline companies on the design requirements for an airborne, optical remote sensor. The results of this survey are disclosed in this report. A substantial amount of time was spent on modeling the expected optical signal at the receiver at different absorption wavelengths, and determining the impact of noise sources such as solar background, signal shot noise, and electronic noise on methane and ethane gas detection. Based upon the signal to noise modeling and industry input, Ophir finalized the design requirements for the airborne sensor, and released the critical sensor light source design requirements to qualified vendors. Responses from the vendors indicated that the light source was not commercially available, and will require a research and development effort to produce. Three vendors have responded positively with proposed design solutions. Ophir has decided to conduct short path optical laboratory experiments to verify the existence of methane and absorption at the specified wavelength, prior to proceeding with the light source selection. Techniques to eliminate common mode noise were also evaluated during the laboratory tests. Finally, Ophir has included a summary of the potential concerns for project success and has established future goals.

  1. Experimental study of rare charged pion decays

    E-Print Network [OSTI]

    Dinko Pocanic; Emil Frlez; Andries van der Schaaf

    2014-07-10T23:59:59.000Z

    The combination of simple dynamics, small number of available decay channels, and extremely well controlled radiative and loop corrections, make charged pion decays a sensitive means for testing the underlying symmetries and the universality of weak fermion couplings, as well as for improving our understanding of pion structure and chiral dynamics. This paper reviews the current state of experimental study of the allowed rare decays of charged pions: (a) leptonic, $\\pi^+ \\to e^+\

  2. Neutrinoless Double Beta Decay and CP Violation

    E-Print Network [OSTI]

    Patrick J. O'Donnell; Utpal Sarkar

    1993-05-27T23:59:59.000Z

    We study the relation between the Majorana neutrino mass matrices and the neutrinoless double beta decay when CP is not conserved. We give an explicit form of the decay rate in terms of a rephasing invariant quantity and demonstrate that in the presence of CP violation it is impossible to have vanishing neutrinoless double beta decay in the case of two neutrino generations (or when the third generation leptons do not mix with other leptons and hence decouple).

  3. Dental Decay Among Texas School Children.

    E-Print Network [OSTI]

    Whitacre, Jessie (Jessie Opal)

    1934-01-01T23:59:59.000Z

    more often found ama older than the younger ones. With all children the numb( ing decayed 6-year molars increased rapidly with age up or 14 years. lightly more girls than boys in each race had decayed tee 'he data secured in this study suggest a... to Caries i vith Other Recent Studies I AcknowIedgm Summary Literature Ci ents -_---. ted -------- CTIN NO. 491 AUGUST, 1934 DENTAL DECAY AMONG TEXAS SCHOOL CHILDREN* sometix extensi Seve: aualifif agcum someti] diet (6 to curl...

  4. 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)

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

    2009-01-01T23:59:59.000Z

    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.

  5. The particulate and vapor phase components of airborne polyaromatic hydrocarbons (PAHs) in coal gasification pilot plants 

    E-Print Network [OSTI]

    Brink, Eric Jon

    1980-01-01T23:59:59.000Z

    , the hot gases flow into a condenser where they are (1-3, 7) cooled and the liquid sulfur 1s removed. The final steps 1n the gasif1cation process are to compr ess the methanated gas from appr oximately 140 psig to pipel1ne pr essure of 1000 psig...THE PARTICULATE AND VAPOR PHASE COMPONENTS OF AIRBORNE POLYAROMATIC HYDROCARBONS(PAHs) IN COAL GASIFICATION PILOT PLANTS A Thesis by ERIC JON BRINK Submitted to the Graduate College of Texas A & M University in partial fulfillment...

  6. ARM - Field Campaign - ARM Airborne Carbon Measurements (ARM-ACME V)

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy, science,SpeedingWu,IntelligenceYouQualityAirborne Carbon Measurements

  7. The Decay of the Neutron or Beta Decay, the Big Bang, and the...

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

    Decay of the Neutron or Beta Decay, the Big Bang, and the Left-Handed Universe Apr 03 2014 01:00 PM - 02:30 PM Geoffrey L. Greene Physics Division, ORNL Research Accelerator...

  8. Spectroscopy of element 115 decay chains

    SciTech Connect (OSTI)

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

    2013-01-01T23:59:59.000Z

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

  9. Nuclear beta-decay measurements and |Vud|

    E-Print Network [OSTI]

    Dan Melconian

    2011-08-11T23:59:59.000Z

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

  10. The beta-decay of 22Al

    E-Print Network [OSTI]

    N. L. Achouri; F. de Oliveira Santos; M. Lewitowicz; B. Blank; J. Aysto; G. Canchel; S. Czajkowski; P. Dendooven; A. Emsallem; J. Giovinazzo; N. Guillet; A. Jokinen; A. M. Laird; C. Longour; K. Perajarvi; N. Smirnova; M. Stanoiu; J. C. Thomas

    2006-08-01T23:59:59.000Z

    In an experiment performed at the LISE3 facility of GANIL, we studied the decay of 22Al produced by the fragmentation of a 36Ar primary beam. A beta-decay half-life of 91.1 +- 0.5 ms was measured. The beta-delayed one- and two-proton emission as well as beta-alpha and beta-delayed gamma decays were measured and allowed us to establish a partial decay scheme for this nucleus. New levels were determined in the daughter nucleus 22Mg. The comparison with model calculations strongly favours a spin-parity of 4+ for the ground state of 22Al.

  11. Displacement Echoes: Classical Decay and Quantum Freeze

    E-Print Network [OSTI]

    Cyril Petitjean; Diego V. Bevilaqua; Eric J. Heller; Philippe Jacquod

    2007-04-23T23:59:59.000Z

    Motivated by neutron scattering experiments, we investigate the decay of the fidelity with which a wave packet is reconstructed by a perfect time-reversal operation performed after a phase space displacement. In the semiclassical limit, we show that the decay rate is generically given by the Lyapunov exponent of the classical dynamics. For small displacements, we additionally show that, following a short-time Lyapunov decay, the decay freezes well above the ergodic value because of quantum effects. Our analytical results are corroborated by numerical simulations.

  12. Review of double beta decay experiments

    E-Print Network [OSTI]

    A. S. Barabash

    2014-03-12T23:59:59.000Z

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

  13. Operator Analysis of Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    Kiwoon Choi; Kwang Sik Jeong; Wan Young Song

    2002-07-19T23:59:59.000Z

    We study the effective operators of the standard model fields which would yield an observable rate of neutrinoless double beta decay. We particularly focus on the possibility that neutrinoless double beta decay is dominantly induced by lepton-number-violating higher dimensional operators other than the Majorana neutrino mass. Our analysis can be applied to models in which neutrinoless double beta decay is induced either by a strong dynamics or by quantum gravity effects at a fundamental scale near the TeV scale as well as the conventional models in which neutrinoless double beta decay is induced by perturbative renormalizable interactions.

  14. New limits for neutrinoless tau decays

    E-Print Network [OSTI]

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

    1998-05-01T23:59:59.000Z

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

  15. Neutrinoless Double Beta Decay and Neutrino Masses

    E-Print Network [OSTI]

    Michael Duerr

    2012-06-04T23:59:59.000Z

    Neutrinoless double beta decay is a promising test for lepton number violating physics beyond the standard model of particle physics. There is a deep connection between this decay and the phenomenon of neutrino masses. In particular, we will discuss the relation between neutrinoless double beta decay and Majorana neutrino masses provided by the so-called Schechter--Valle theorem in a quantitative way. Furthermore, we will present an experimental cross check to discriminate neutrinoless double beta decay from unknown nuclear background using only one isotope, i.e., within one experiment.

  16. Neutrinoless Double Beta Decay: Present and Future

    E-Print Network [OSTI]

    Oliviero Cremonesi

    2002-10-04T23:59:59.000Z

    Present status, and future plans for Double Beta Decay searches are reviewed. Given the recent observations of neutrino oscillations, a possibility to observe $\\beta\\beta(0\

  17. Displacement Echoes: Classical Decay and Quantum Freeze

    SciTech Connect (OSTI)

    Petitjean, Cyril [Departement de Physique Theorique, Universite de Geneve, CH-1211 Geneva 4 (Switzerland); Bevilaqua, Diego V. [Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States); Heller, Eric J. [Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States); Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138 (United States); Jacquod, Philippe [Physics Department, University of Arizona, Tucson, Arizona 85721 (United States)

    2007-04-20T23:59:59.000Z

    Motivated by neutron scattering experiments, we investigate the decay of the fidelity with which a wave packet is reconstructed by a perfect time-reversal operation performed after a phase-space displacement. In the semiclassical limit, we show that the decay rate is generically given by the Lyapunov exponent of the classical dynamics. For small displacements, we additionally show that, following a short-time Lyapunov decay, the decay freezes well above the ergodic value because of quantum effects. Our analytical results are corroborated by numerical simulations.

  18. Transport of radon and thoron at the earth`s surface. Progress report, 1 January 1992--1 January 1993

    SciTech Connect (OSTI)

    Schery, S.D.

    1992-07-01T23:59:59.000Z

    This report covers progress under the current funding period 1 Jan 1992 to 1 Jan 1993 and presents the continuation proposal for 1 Jan 1993 to 1 Jan 1994. The previous progress report was submitted in June 1991, so activities during the last half of 1991 will also be included. Our major activities over the last year have continued to focus on measurements and modeling of the disequilibrium of radon and thoron progeny outdoors, and analysis of data on indoor thoron and thoron progeny.

  19. Flight Testing of an Advanced Airborne Natural Gas Leak Detection System

    SciTech Connect (OSTI)

    Dawn Lenz; Raymond T. Lines; Darryl Murdock; Jeffrey Owen; Steven Stearns; Michael Stoogenke

    2005-10-01T23:59:59.000Z

    ITT Industries Space Systems Division (Space Systems) has developed an airborne natural gas leak detection system designed to detect, image, quantify, and precisely locate leaks from natural gas transmission pipelines. This system is called the Airborne Natural Gas Emission Lidar (ANGEL) system. The ANGEL system uses a highly sensitive differential absorption Lidar technology to remotely detect pipeline leaks. The ANGEL System is operated from a fixed wing aircraft and includes automatic scanning, pointing system, and pilot guidance systems. During a pipeline inspection, the ANGEL system aircraft flies at an elevation of 1000 feet above the ground at speeds of between 100 and 150 mph. Under this contract with DOE/NETL, Space Systems was funded to integrate the ANGEL sensor into a test aircraft and conduct a series of flight tests over a variety of test targets including simulated natural gas pipeline leaks. Following early tests in upstate New York in the summer of 2004, the ANGEL system was deployed to Casper, Wyoming to participate in a set of DOE-sponsored field tests at the Rocky Mountain Oilfield Testing Center (RMOTC). At RMOTC the Space Systems team completed integration of the system and flew an operational system for the first time. The ANGEL system flew 2 missions/day for the duration for the 5-day test. Over the course of the week the ANGEL System detected leaks ranging from 100 to 5,000 scfh.

  20. Health physics manual of good practices for the prompt detection of airborne plutonium in the workplace

    SciTech Connect (OSTI)

    Not Available

    1988-07-01T23:59:59.000Z

    This manual provides guidance to US Department of Energy (DOE) facilities on the prompt detection of airborne plutonium in the workplace. Information is first given to aid in detection systems that will function effectively in various workplaces. Steps in designing a system are covered: its general requirements, the plotting of workplace sources of plutonium, and methods of determining workplace airflow patterns. Guidance is provided on the proper numbers and locations of probe sites, the orientation of probes for representative sampling, and the mixture of stationary and portable probes. Recommendations for delivery in sampling systems include examination of particle loss and self-absorption problems, methods of eliminating air leakage in the system, and optimization of decontamination capabilities. System flow rate, requirements in a collection medium, burial loss and pressure drop, and prudent frequency of renewing the collection medium are among air sampling considerations covered. After a discussion of controlling airflow and of vacuum sources and system backups, the checkpoints to ensure system reliability are listed. The manual then discusses instrument specifications that provide correct airborne plutonium concentrations and reliably activate alarms. Focusing on the interrelationship of all components, essential factors in instrument reliability are addressed: the regulatory lower limit of detection and performance specifications of detectors and filters, maintenance and calibration requirements, and features of commonly used plutonium air-sampling instruments. Finally, the manual advises on establishing a documentation program to archive and evaluate the performance of a plutonium air-sampling program.

  1. Emergency Response Equipment and Related Training: Airborne Radiological Computer System (Model II)

    SciTech Connect (OSTI)

    David P. Colton

    2007-02-28T23:59:59.000Z

    The materials included in the Airborne Radiological Computer System, Model-II (ARCS-II) were assembled with several considerations in mind. First, the system was designed to measure and record the airborne gamma radiation levels and the corresponding latitude and longitude coordinates, and to provide a first overview look of the extent and severity of an accident's impact. Second, the portable system had to be light enough and durable enough that it could be mounted in an aircraft, ground vehicle, or watercraft. Third, the system must control the collection and storage of the data, as well as provide a real-time display of the data collection results to the operator. The notebook computer and color graphics printer components of the system would only be used for analyzing and plotting the data. In essence, the provided equipment is composed of an acquisition system and an analysis system. The data can be transferred from the acquisition system to the analysis system at the end of the data collection or at some other agreeable time.

  2. Neutrino oscillations and neutrinoless double beta decay

    E-Print Network [OSTI]

    D. Falcone; F. Tramontano

    2001-03-16T23:59:59.000Z

    The relation between neutrino oscillation parameters and neutrinoless double beta decay is studied, assuming normal and inverse hierarchies for Majorana neutrino masses. For normal hierarchy the crucial dependence on U_{e3} is explored. The link with tritium beta decay is also briefly discussed.

  3. Neutrinoless double beta decay and neutrino physics

    E-Print Network [OSTI]

    Werner Rodejohann

    2012-08-20T23:59:59.000Z

    The connection of neutrino physics with neutrinoless double beta decay is reviewed. After presenting the current status of the PMNS matrix and the theoretical background of neutrino mass and lepton mixing, we will summarize the various implications of neutrino physics for double beta decay. The influence of light sterile neutrinos and other exotic modifications of the three neutrino picture is also discussed.

  4. Spectroscopy and decays of charm and bottom

    SciTech Connect (OSTI)

    Butler, J.N.

    1997-10-01T23:59:59.000Z

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

  5. Strong effects in weak nonleptonic decays

    SciTech Connect (OSTI)

    Wise, M.B.

    1980-04-01T23:59:59.000Z

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

  6. Neutrinoless Double Beta Decay in Light of SNO Salt Data

    E-Print Network [OSTI]

    Murayama, Hitoshi

    2009-01-01T23:59:59.000Z

    Limits From Neutrinoless Double-Beta Decay (Rev. ),” incan also cause neutrinoless double-beta decay (see e.g. , [LBNL-53996 Neutrinoless Double Beta Decay in Light of SNO

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

    E-Print Network [OSTI]

    Bryant, Adam Douglas

    2010-01-01T23:59:59.000Z

    A Search for Neutrinoless Double Beta Decay of Te by AdamA Search for Neutrinoless Double Beta Decay of CopyrightA Search for Neutrinoless Double Beta Decay of Te by Adam

  8. Predicting neutrinoless double beta decay

    SciTech Connect (OSTI)

    Hirsch, M.; Villanova del Moral, A.; Valle, J.W.F. [AHEP Group, Instituto de Fisica Corpuscular - C.S.I.C./Universitat de Valencia, Edificio Institutos de Paterna, Apt 22085, E-46071 Valencia (Spain); Ma, Ernest [Physics Department, University of California, Riverside, California 92521 (United States); Institute for Particle Physics Phenomenology, University of Durham, Durham, DH1 3LE (United Kingdom)

    2005-11-01T23:59:59.000Z

    We give predictions for the neutrinoless double beta decay rate in a simple variant of the A{sub 4} family symmetry model. We show that there is a lower bound for the {beta}{beta}{sub 0{nu}} amplitude even in the case of normal hierarchical neutrino masses, corresponding to an effective mass parameter vertical bar m{sub ee} vertical bar {>=}0.17{radical}({delta}m{sub ATM}{sup 2}). This result holds both for the CP conserving and CP violating cases. In the latter case we show explicitly that the lower bound on vertical bar m{sub ee} vertical bar is sensitive to the value of the Majorana phase. We conclude therefore that in our scheme, {beta}{beta}{sub 0{nu}} may be accessible to the next generation of high sensitivity experiments.

  9. Evaluation of DART 3D model in the thermal domain using satellite/airborne imagery and ground-based measurements

    E-Print Network [OSTI]

    Boyer, Edmond

    1 Evaluation of DART 3D model in the thermal domain using satellite/airborne imagery and ground ISSN0143-1161print/ISSN1366-5901, DOI:10.1080/01431161.2010.524672 jean to energy fluxes at the earth's surface. Its physical magnitude is defined as the effective kinetic

  10. A comparison of cloud top heights computed from airborne lidar and MAS radiance data using CO2 slicing

    E-Print Network [OSTI]

    Sheridan, Jennifer

    A comparison of cloud top heights computed from airborne lidar and MAS radiance data using CO2 in assessing the accuracy of the CO2-slicing cloud height algorithm. Infrared measurements of upwelling which included various single- layer and multilayer cloud conditions. Overall, the CO2-slicing method

  11. Estimating forest structural characteristics with airborne lidar scanning and a near-real time profiling laser systems

    E-Print Network [OSTI]

    Zhao, Kaiguang

    2009-05-15T23:59:59.000Z

    for realtime remote sensing platforms, e.g., to provide timely information for urgent applications. This study aims to develop an airborne profiling LiDAR system, featured with on-the-fly data processing, for near real- or real- time forest inventory...

  12. Use of land surface remotely sensed satellite and airborne data for environmental exposure assessment in cancer research

    E-Print Network [OSTI]

    cancer and environmental contaminants, focusing primarily on agricultural chemical exposure assessmentUse of land surface remotely sensed satellite and airborne data for environmental exposure assessment in cancer research SUSAN K. MAXWELLa , JAYMIE R. MELIKERb AND PIERRE GOOVAERTSc a U.S. Geological

  13. EVALUATION OF AIRBORNE AND SATELLITE ELECTRO-OPTICAL SENSORS PERFORMANCES BY USE OF HIGH-ALTITUDE CLOUDS OCCURRENCE

    E-Print Network [OSTI]

    EVALUATION OF AIRBORNE AND SATELLITE ELECTRO-OPTICAL SENSORS PERFORMANCES BY USE OF HIGH The impact of high-altitude clouds along an electro- optical sensor line of sight has been studied, F-91761 Palaiseau, France, email : karine.caillault@onera.fr KEYWORDS: sensor performance

  14. Ambient Airborne Solids Concentrations Including Volcanic Ash at Hanford, Washington Sampling Sites Subsequent to the Mount St. Helens Eruption

    SciTech Connect (OSTI)

    Sehmel, G.A.

    1982-12-20T23:59:59.000Z

    A major eruption of Mount St. Helens occurred on May 18, 1980. Subsequently, airborne solid concentrations were measured as a function of time at two sites within the southern edge of the fallout plume about 211 km east of Mount St. Helens. This ash was a source for investigating area-wide resuspension. Rain had a variable effect on decreasing airborne concentrations from resuspension. From 0.5 to 1.5 cm of rain were required to significantly reduce airborne solid concentrations through July. For a more aged resuspension source in September, a rain of 2.0 cm had a negligible effect. A monthly average threshold-wind speed for resuspension was defined as 3.6 m/s. For monthly-average wind speeds less than the threshold wind speed, monthly-average airborne concentrations tended to decrease with time. A decrease was recorded between September and October. For this 4-month time period, the half-life was on the order of 50 days, corresponding to a weathering rate of 5.1 year/sup -1/.

  15. EMAG2: A 2arc min resolution Earth Magnetic Anomaly Grid compiled from satellite, airborne, and marine magnetic

    E-Print Network [OSTI]

    Müller, Dietmar

    grid for the World Digital Magnetic Anomaly Map. The resolution has been improved from 3 arc min to 2EMAG2: A 2­arc min resolution Earth Magnetic Anomaly Grid compiled from satellite, airborne, I-19020 Fezzano, Italy [1] A global Earth Magnetic Anomaly Grid (EMAG2) has been compiled from

  16. auger decay spectra: Topics by E-print Network

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

    2008-01-01 44 Constraining Mass Spectra with Sterile Neutrinos from Neutrinoless Double Beta Decay, Tritium Beta Decay and Cosmology HEP - Experiment (arXiv) Summary: We...

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

    Office of Scientific and Technical Information (OSTI)

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

  18. B, D and K Decays

    SciTech Connect (OSTI)

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

    2008-03-07T23:59:59.000Z

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

  19. The strong decays of K1 resonances

    E-Print Network [OSTI]

    Andrey Tayduganov; Emi Kou; Alain Le Yaouanc

    2011-11-27T23:59:59.000Z

    We investigate the K1--> K pi pi strong interaction decays. Using the 3P0 quark-pair-creation model to derive the basic parametrization, we discuss in detail how to obtain the various partial wave amplitudes into the possible quasi-two-body decay channels as well as their relative phases from the currently available experimental data. We obtain the K1 mixing angle to be thetaK1= 60 deg, in agreement with previous works. Our study can be applied to extract the information needed for the photon polarization determination of the radiative B--> K1 gamma decay.

  20. Alpha decay chains from element 113

    E-Print Network [OSTI]

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

    2007-04-30T23:59:59.000Z

    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.

  1. Higgs boson decay to mu mubar gamma

    E-Print Network [OSTI]

    Ali Abbasabadi; Wayne W. Repko

    2000-04-17T23:59:59.000Z

    The Higgs boson decay, H -> mu mubar gamma, is studied in the Standard Model at the tree and one-loop levels. It is shown that for Higgs boson masses above 110 GeV, the contribution to the radiative width from the one-loop level exceeds the contribution from the tree level, and for Higgs boson masses above 140 GeV, it even exceeds the contribution from the tree level decay H -> mu mubar. We also show that the contributions to the radiative decay width from the interference terms between the tree and one-loop diagrams are negligible.

  2. beta-decay study of Cu-77

    E-Print Network [OSTI]

    N. Patronis; H. De Witte; M. Gorska; M. Huyse; K. Kruglov; D. Pauwels; K. Van de Vel; P. Van Duppen; J. Van Roosbroeck; J. -C. Thomas; S. Franchoo; J. Cederkall; V. N. Fedoseyev; H. Fynbo; U. Georg; O. Jonsson; U. Köster; T. Materna; L. Mathieu; O. Serot; L. Weissman; W. F. Mueller; V. I. Mishin; D. Fedorov

    2009-09-01T23:59:59.000Z

    A beta-decay study of Cu-77 has been performed at the ISOLDE mass separator with the aim to deduce its beta-decay properties and to obtain spectroscopic information on Zn-77. Neutron-rich copper isotopes were produced by means of proton- or neutron-induced fission reactions on U-238. After the production, Cu-77 was selectively laser ionized, mass separated and sent to different detection systems where beta-gamma and beta-n coincidence data were collected. We report on the deduced half-live, decay scheme, and possible spin assignment of 77Cu.

  3. Closed strings from decaying D-branes

    E-Print Network [OSTI]

    Neil Lambert; Hong Liu; Juan Maldacena

    2007-02-05T23:59:59.000Z

    We compute the emission of closed string radiation from homogeneous rolling tachyons. For an unstable decaying D$p$-brane the radiated energy is infinite to leading order for $p\\leq 2$ and finite for $p>2$. The closed string state produced by a decaying brane is closely related to the state produced by D-instantons at a critical Euclidean distance from $t=0$. In the case of a D0 brane one can cutoff this divergence so that we get a finite energy final state which would be the state that the brane decays into.

  4. Gauss-Bonnet Term on Vacuum Decay

    E-Print Network [OSTI]

    Rong-Gen Cai; Bin Hu; Seoktae Koh

    2008-11-20T23:59:59.000Z

    We study the effect of the Gauss-Bonnet term on vacuum decay process in the Coleman-De Luccia formalism. The Gauss-Bonnet term has an exponential coupling with the real scalar field, which appears in the low energy effective action of string theories. We calculate numerically the instanton solution, which describes the process of vacuum decay, and obtain the critical size of bubble. We find that the Gauss-Bonnet term has a nontrivial effect on the false vacuum decay, depending on the Gauss-Bonnet coefficient.

  5. Airborne Multisensor Pod System, Arms control and nonproliferation technologies: Second quarter 1995

    SciTech Connect (OSTI)

    Alonzo, G.M.; Sanford, N.M. [eds.] [eds.

    1995-01-01T23:59:59.000Z

    This issue focuses on the Airborne Multisensor Pod System (AMPS) which is a collaboration of many of the DOE national laboratories to provide a scientific environment to research multiple sensors and the new information that can be derived from them. The bulk of the research has been directed at nonproliferation applications, but it has also proven useful in environmental monitoring and assessment, and land/water management. The contents of this issue are: using AMPS technology to detect proliferation and monitor resources; combining multisensor data to monitor facilities and natural resources; planning a AMPS mission; SAR pod produces images day or night, rain or shine; MSI pod combines data from multiple sensors; ESI pod will analyze emissions and effluents; and accessing AMPS information on the Internet.

  6. An overview of airborne radioactive emissions at Los Alamos National Laboratory

    SciTech Connect (OSTI)

    Guevara, F.A.; Dvorak, R.F.

    1987-01-01T23:59:59.000Z

    Strict control is essential over any emissions of radioactivity in the ventilation exhaust from facilities where radioactive materials may become airborne. At Los Alamos National Laboratory there are 87 stacks exhausting ventilation air to the environment from operations with a potential for radioactive emissions. These stacks cover the diverse operations at all Laboratory facilities where radioactive materials are handled and require continuous sampling/monitoring to detect levels of contamination. An overview is presented of the operations, associated ventilation exhaust cleanup systems, and analysis of the emissions. In keeping with the as-low-as-reasonably-achievable concept, emissions of radionuclides are reduced whenever practicable. A specific example describing the reduction of emissions from the linear accelerator beam stop area at the Los Alamos Meson Physics Facility during 1985 by a factor of 8 over previous emissions is presented.

  7. Effective field theories for inclusive B decays

    E-Print Network [OSTI]

    Lee, Keith S. M. (Keith Seng Mun)

    2006-01-01T23:59:59.000Z

    In this thesis, we study inclusive decays of the B meson. These allow one to determine CKM elements precisely and to search for physics beyond the Standard Model. We use the framework of effective field theories, in ...

  8. The BNL rare kaon decay program

    SciTech Connect (OSTI)

    Littenberg, L.

    1996-12-31T23:59:59.000Z

    The rare kaon decay program at Brookhaven National Laboratory is reviewed. Results from the last round of experiments are briefly discussed. The three experiments currently collecting data are described. Prospects for future experiments are discussed.

  9. Theory of top quark production and decay

    SciTech Connect (OSTI)

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

    1997-01-01T23:59:59.000Z

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

  10. Neutrino Decay and Solar Neutrino Seasonal Effect

    E-Print Network [OSTI]

    Picoreti, R; de Holanda, P C; Peres, O L G

    2015-01-01T23:59:59.000Z

    We consider the possibility of solar neutrino decay as a sub-leading effect on their propagation between production and detection. Using current oscillation data, we set a new lower bound to the $\

  11. Double beta decay and neutrino mass models

    E-Print Network [OSTI]

    Helo, J C; Ota, T; Santos, F A Pereira dos

    2015-01-01T23:59:59.000Z

    Neutrinoless double beta decay allows to constrain lepton number violating extensions of the standard model. If neutrinos are Majorana particles, the mass mechanism will always contribute to the decay rate, however, it is not a priori guaranteed to be the dominant contribution in all models. Here, we discuss whether the mass mechanism dominates or not from the theory point of view. We classify all possible (scalar-mediated) short-range contributions to the decay rate according to the loop level, at which the corresponding models will generate Majorana neutrino masses, and discuss the expected relative size of the different contributions to the decay rate in each class. We also work out the phenomenology of one concrete 2-loop model in which both, mass mechanism and short-range diagram, might lead to competitive contributions, in some detail.

  12. Phenomenology of neutrinoless double beta decay

    E-Print Network [OSTI]

    J. J. Gómez-Cadenas; Justo Martín-Albo

    2015-02-25T23:59:59.000Z

    This paper reviews the current status and future outlook of neutrinoless double beta decay searches, which try to provide an answer to the fundamental question of whether neutrinos are Dirac or Majorana particles.

  13. Recent Results in Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    Lisa J. Kaufman

    2013-05-14T23:59:59.000Z

    The search for neutrinoless double beta decay is a rich source for new physics. The observation of this decay will lead to understanding of the absolute mass scale of neutrinos, the Majorana nature of the neutrino (whether the neutrino is its own anti-particle), and lepton number violation. Double beta decay is being investigated around the world by several experiments using different candidate isotopes. There has been much progress made in experimental techniques recently such that achieving sensitivity to neutrino masses at 50 meV and below will be possible in the near future. A summary of recent results in neutrinoless double beta decay is discussed with a look toward the experimental goals for the future.

  14. Phenomenology of neutrinoless double beta decay

    E-Print Network [OSTI]

    Gómez-Cadenas, J J

    2015-01-01T23:59:59.000Z

    This paper reviews the current status and future outlook of neutrinoless double beta decay searches, which try to provide an answer to the fundamental question of whether neutrinos are Dirac or Majorana particles.

  15. Electrical Analogs of Atomic Radiative Decay Processes

    E-Print Network [OSTI]

    Fontana, Peter R.; Srivastava, Rajendra P.

    1977-03-01T23:59:59.000Z

    Simple electrical circuits are analyzed, and the results show that for high frequencies they have frequency and time responses identical to the spontaneous radiative decays of atoms. As an illustration of the analogy a two-circuit electrical system...

  16. Can Dark Matter Decay in Dark Energy?

    E-Print Network [OSTI]

    S. H. Pereira; J. F. Jesus

    2009-02-26T23:59:59.000Z

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

  17. New Physics Effects From B Meson Decays

    E-Print Network [OSTI]

    Anirban Kundu

    2000-03-23T23:59:59.000Z

    In this talk, we point out some of the present and future possible signatures of physics beyond the Standard Model from B-meson decays, taking R-parity conserving and violating supersymmetry as illustrative examples.

  18. CP Violation in Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    T. Fukuyama; K. Matsuda; H. Nishiura

    1997-08-19T23:59:59.000Z

    We argue three-flavour neutrino mixing. We consider the neutrinos as Majorana particles and see how the neutrinoless double beta decay constrains the neutrino mixing angles. Our formulation is widely valid and is applied to the neutrino oscillation experiment.

  19. Non-standard semileptonic hyperon decays

    E-Print Network [OSTI]

    Hsi-Ming Chang; Martin González-Alonso; Jorge Martin Camalich

    2015-03-05T23:59:59.000Z

    We investigate the discovery potential of semileptonic hyperon decays in terms of searches of new physics at teraelectronvolt scales. These decays are controlled by a small $SU(3)$-flavor breaking parameter that allows for systematic expansions and accurate predictions in terms of a reduced dependence on hadronic form factors. We find that muonic modes are very sensitive to non-standard scalar and tensor contributions and demonstrate that these could provide a powerful synergy with direct searches of new physics at the LHC.

  20. Fidelity Decay for Phase Space Displacements

    E-Print Network [OSTI]

    Diego V. Bevilaqua; Eric J. Heller

    2004-09-03T23:59:59.000Z

    In this letter we analyse the behavior of fidelity decay under a very specific kind of perturbation: phase space displacements. Under these perturbations, systems will decay following the Lyapunov regime only. Others universal regimes discussed in the literature are not presented in this case; instead, for small values of the perturbation we observe quantum freeze of the fidelity. We also show that it is possible to connect this result with the incoherent neutron scattering problem

  1. Vacuum decay in a soluble model

    SciTech Connect (OSTI)

    Ferraz de Camargo F, A.; Shellard, R.C.; Marques, G.C.

    1984-03-15T23:59:59.000Z

    We study a field-theoretical model where the decay rate of the false vacuum can be computed up to the first quantum corrections in both the high-temperature and zero-temperature limits. We find that the dependence of the decay rate on the height and width of the potential barrier does not follow the same simple area rule as in the quantum-mechanical case. Furthermore, its behavior is strongly model dependent.

  2. Neutrinoless double beta decay with scalar bilinears

    E-Print Network [OSTI]

    H. V. Klapdor-Kleingrothaus; U. Sarkar

    2002-11-18T23:59:59.000Z

    One possible probe to physics beyond the standard model is to look for scalar bilinears, which couple to two fermions of the standard model. We point out that the scalar bilinears allow new diagrams contributing to the neutrinoless double beta decay. The upper bound on the neutrinoless double beta decay lifetime would then give new constraints on the ratio of the masses of these scalars to their couplings to the fermions.

  3. Searches for neutrinoless double beta decay

    E-Print Network [OSTI]

    B. Schwingenheuer

    2012-01-24T23:59:59.000Z

    Neutrinoless double beta decay is a lepton number violating process whose observation would also establish that neutrinos are their own anti-particles. There are many experimental efforts with a variety of techniques. Some (EXO, Kamland-Zen, GERDA phase I and CANDLES) started take data in 2011 and EXO has reported the first measurement of the half life for the double beta decay with two neutrinos of $^{136}$Xe. The sensitivities of the different proposals are reviewed.

  4. Rare meson decays into very light neutralinos

    SciTech Connect (OSTI)

    O'Leary, Ben [Institut fuer Theoretische Physik, RWTH Aachen University, 52056 Aachen (Germany)

    2010-02-10T23:59:59.000Z

    Results are presented for the two-body decays of mesons into light neutralinos and from the first complete calculation of the loop-induced decays of kaons to pions plus light neutralinos and of B mesons to kaons plus light neutralinos. The branching ratios are shown to be strongly suppressed within the MSSM with minimal flavor violation, and no bounds on the neutralino mass can be inferred from experimental data, i.e. a massless neutralino is allowed.

  5. False Starts in History of Searches for 2{beta} Decay, or Discoverless Double Beta Decay

    SciTech Connect (OSTI)

    Tretyak, V. I. [Institute for Nuclear Research, MSP 03680, Kyiv (Ukraine)

    2011-12-16T23:59:59.000Z

    A collection of stories is presented on discoveries of 2{beta} decay (including neutrinoless one) which were refuted in the subsequent investigations.

  6. Calculated final state probability distributions for T2 -decay measurements

    E-Print Network [OSTI]

    Washington at Seattle, University of - Department of Physics, Electroweak Interaction Research Group

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 1.6.1 Neutrinoless double beta decay . . . . . . . . . . . . . . . . . . . . 19 1.6.2 Cosmological

  7. Ratios of heavy hadron semileptonic decay rates

    E-Print Network [OSTI]

    Michael Gronau; Jonathan L. Rosner

    2010-12-27T23:59:59.000Z

    Ratios of charmed meson and baryon semileptonic decay rates appear to be satisfactorily described by considering only the lowest-lying (S-wave) hadronic final states and assuming the kinematic factor describing phase space suppression is the same as that for free quarks. For example, the rate for $D_s$ semileptonic decay is known to be $(17.0 \\pm 5.3)%$ lower than those for $D^0$ or $D^+$, and the model accounts for this difference. When applied to hadrons containing $b$ quarks, this method implies that the $B_s$ semileptonic decay rate is about 1% higher than that of the nonstrange $B$ mesons. This small difference thus suggests surprisingly good local quark-hadron duality for $B$ semileptonic decays, complementing the expectation based on inclusive quark-hadron duality that these differences in rates should not exceed a few tenths of a percent. For $\\Lambda_b$ semileptonic decay, however, the inclusive rate is predicted to be about 13% greater than that of the nonstrange $B$ mesons. This value, representing a considerable departure from a calculation using a heavy quark expansion, is close to the corresponding experimental ratio $\\Gamma(\\Lambda_b)/ \\bar \\Gamma(B) = 1.13 \\pm 0.03$ of total decay rates.

  8. Airborne protected military satellite communications : analysis of open-loop pointing and closed-loop tracking with noisy platform attitude information

    E-Print Network [OSTI]

    Deike, William D

    2010-01-01T23:59:59.000Z

    U.S. military assets' increasing need for secure global communications has led to the design and fabrication of airborne satellite communication terminals that operate under protected security protocol. Protected transmission ...

  9. The Influence of a Subslab Gravel Layer and Open Area on Soil-Gas and Radon Entry into Two Experimental Basements

    SciTech Connect (OSTI)

    Robinson, Allen L.; Sextro, R.G.

    1995-03-01T23:59:59.000Z

    Measurements of steady-state soil-gas and {sup 222}Rn entry rates into two room-sized, experimental basement structures were made for a range of structure depressurizations (0-40 Pa) and open floor areas (0-165 x 10{sup -4} m{sup 2}). The structures are identical except that in one the floor slab lies directly on native soil whereas in the other the slab lies on a high-permeability gravel layer. The subslab gravel layer greatly enhances the soil-gas and radon entry rate into the structure. The radon entry rate into the structure with the subslab gravel layer is four times greater than the entry rate into the structure without the gravel layer with an open floor area of 165 x 10{sup -4}m{sup 2}; however the ratio increases to 30 for an open floor area of 5.0 x 10{sup -4} m{sup 2}. The relationship between open area and soil-gas entry rate is complex. It depends on both the amount and distribution of the open area as well as the permeability of the soil near the opening. The entry rate into the experimental structures is largely determined by the presence or absence of a subslab gravel layer. Therefore open area is a poor indicator of radon and soil-gas entry into the structures. The extension of the soil-gas pressure field created by structure depressurization is a good measure of the radon entry. The measured normalized radon entry rate into both structures has the same linear relationship with the average subslab pressure coupling regardless of open area or the presence or absence of a subslab gravel layer. The average subslab pressure coupling is an estimate of the extension of the soil-gas pressure field. A three-dimensional finite-difference model correctly predicts the effect of a subslab gravel layer and different open area configurations on radon and soil-gas entry rate; however, the model underpredicts the absolute entry rate into each structure by a factor of 1.5.

  10. A comparative study of collection efficiencies using 0.80 and 1.2 micrometer pore size filters in evaluating airborne asbestos dust

    E-Print Network [OSTI]

    Holt, Grady Lynn

    1974-01-01T23:59:59.000Z

    A COMPARATIVE STUDY OF COLLECTION EFFICIENCIES USING O. RO AND 1. 2 MICROMETER PORE SIZE FILTERS IN EVALUATING AIRBORNE ASBESTOS DUST A Thesis by GRADY LYNN HOLT Submitted to the Graduate College of' Texas A&M University in partial... fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1974. Major Subject: Industrial Hygiene A COMPARATIVE . TUDY OF COLLECTION EFFICIENCIES USING O. BO AND 1. 2 MICROMETER PORE SIZE FILTERS IN EVALUATING AIRBORNE ASBESTOS DUST A...

  11. A comparative study of collection efficiencies using 0.80 and 1.2 micrometer pore size filters in evaluating airborne asbestos dust 

    E-Print Network [OSTI]

    Holt, Grady Lynn

    1974-01-01T23:59:59.000Z

    A COMPARATIVE STUDY OF COLLECTION EFFICIENCIES USING O. RO AND 1. 2 MICROMETER PORE SIZE FILTERS IN EVALUATING AIRBORNE ASBESTOS DUST A Thesis by GRADY LYNN HOLT Submitted to the Graduate College of' Texas A&M University in partial... fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1974. Major Subject: Industrial Hygiene A COMPARATIVE . TUDY OF COLLECTION EFFICIENCIES USING O. BO AND 1. 2 MICROMETER PORE SIZE FILTERS IN EVALUATING AIRBORNE ASBESTOS DUST A...

  12. DRAM Decay: Using Decay Counters to Reduce Energy Consumption in DRAMs

    E-Print Network [OSTI]

    Lee, Hsien-Hsin "Sean"

    DRAM Decay: Using Decay Counters to Reduce Energy Consumption in DRAMs Mrinmoy Ghosh Hsien-Hsin S. Lee School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta, GA 30332 technology they use. For each refresh in a DRAM row, the stored information in each cell is read out

  13. Neutrino Decay and Neutrinoless Double Beta Decay in a 3-3-1 Model

    E-Print Network [OSTI]

    Alex G. Dias; A. Doff; C. A. de S. Pires; P. S. Rodrigues da Silva

    2005-08-11T23:59:59.000Z

    In this work we show that the implementation of spontaneous breaking of the lepton number in the 3-3-1 model with right-handed neutrinos gives rise to fast neutrino decay with majoron emission and generates a bunch of new contributions to the neutrinoless double beta decay.

  14. Neutrino decay and neutrinoless double beta decay in a 3-3-1 model

    SciTech Connect (OSTI)

    Dias, Alex G. [Instituto de Fisica, Universidade de Sao Paulo, Caixa Postal 66.318, 05315-970, Sao Paulo-SP (Brazil); Doff, A. [Instituto de Fisica Teorica, Universidade Estadual Paulista, Rua Pamplona 145, 01405-900 Sao Paulo-SP (Brazil); Pires, C.A. de S; Rodrigues da Silva, P.S. [Departamento de Fisica, Universidade Federal da Paraiba, Caixa Postal 5008, 58051-970, Joao Pessoa-PB (Brazil)

    2005-08-01T23:59:59.000Z

    In this work we show that the implementation of spontaneous breaking of the lepton number in the 3-3-1 model with right-handed neutrinos gives rise to fast neutrino decay with Majoron emission and generates a bunch of new contributions to the neutrinoless double beta decay.

  15. Assessment of Unabated Facility Emission Potentials for Evaluating Airborne Radionuclide Monitoring Requirements at Pacific Northwest National Laboratory - 1999

    SciTech Connect (OSTI)

    DL Edwards; KD Shields; MJ Sula; MY Ballinger

    1999-09-28T23:59:59.000Z

    Assessments were performed to evaluate compliance with the airborne radionuclide emission monitoring requirements in the National Emission Standards for Hazardous Air Pollutants (NESHAP--US Code of Federal Regulations, Title 40 Part 61, Subpart H). In these assessments, potential unabated offsite doses were evaluated for emission locations at facilities owned by the US Department of Energy and operated by Pacific Northwest National Laboratory (Pacific Northwest) on the Hanford Site. Two of the facilities evaluated, 325 Building Radiochemical Processing Laboratory, and 331 Building Life Sciences Laboratory met state and federal criteria for continuous sampling of airborne radionuclide emissions. One other building, the 3720 Environmental Sciences Laboratory, was recognized as being in transition with the potential for meeting the continuous sampling criteria.

  16. Measurement of airborne fission products in Chapel Hill, NC, USA from the Fukushima Dai-ichi reactor accident

    E-Print Network [OSTI]

    S. MacMullin; G. K. Giovanetti; M. P. Green; R. Henning; R. Holmes; K. Vorren; J. F. Wilkerson

    2012-10-03T23:59:59.000Z

    We present measurements of airborne fission products in Chapel Hill, NC, USA, from 62 days following the March 11, 2011, accident at the Fukushima Dai-ichi nuclear power plant. Airborne particle samples were collected daily in air filters and radio-assayed with two high-purity germanium (HPGe) detectors. The fission products I-131 and Cs-137 were measured with maximum activities of 4.2 +/- 0.6 mBq/m^3 and 0.42 +/- 0.07 mBq/m^3 respectively. Additional activity from I-131, I-132, Cs-134, Cs-136, Cs-137 and Te-132 were measured in the same air filters using a low-background HPGe detector at the Kimballton Underground Research Facility (KURF).

  17. The search for neutrinoless double beta decay

    E-Print Network [OSTI]

    J. J. Gomez-Cadenas; J. Martin-Albo; M. Mezzetto; F. Monrabal; M. Sorel

    2012-01-16T23:59:59.000Z

    In the last two decades the search for neutrinoless double beta decay has evolved into one of the highest priorities for understanding neutrinos and the origin of mass. The main reason for this paradigm shift has been the discovery of neutrino oscillations, which clearly established the existence of massive neutrinos. An additional motivation for conducting such searches comes from the existence of an unconfirmed, but not refuted, claim of evidence for neutrinoless double decay in $^{76}\\text{Ge}$. As a consequence, a new generation of experiments, employing different detection techniques and $\\beta\\beta$ isotopes, is being actively promoted by experimental groups across the world. In addition, nuclear theorists are making remarkable progress in the calculation of the neutrinoless double beta decay nuclear matrix elements, thus eliminating a substantial part of the theoretical uncertainties affecting the particle physics interpretation of this process. In this report, we review the main aspects of the double beta decay process and some of the most relevant experiments. The picture that emerges is one where searching for neutrinoless double beta decay is recognized to have both far-reaching theoretical implications and promising prospects for experimental observation in the near future.

  18. Direct Characterization of Airborne Particles Associated with Arsenic-rich Mine Tailings: Particle Size Mineralogy and Texture

    SciTech Connect (OSTI)

    M Corriveau; H Jamieson; M Parsons; J Campbell; A Lanzirotti

    2011-12-31T23:59:59.000Z

    Windblown and vehicle-raised dust from unvegetated mine tailings can be a human health risk. Airborne particles from As-rich abandoned Au mine tailings from Nova Scotia, Canada have been characterized in terms of particle size, As concentration, As oxidation state, mineral species and texture. Samples were collected in seven aerodynamically fractionated size ranges (0.5-16 {micro}m) using a cascade impactor deployed at three tailings fields. All three sites are used for recreational activities and off-road vehicles were racing on the tailings at two mines during sample collection. Total concentrations of As in the <8 {micro}m fraction varied from 65 to 1040 ng/m{sup 3} of air as measured by proton-induced X-ray emission (PIXE) analysis. The same samples were analysed by synchrotron-based microfocused X-ray absorption near-edge spectroscopy ({micro}XANES) and X-ray diffraction ({micro}XRD) and found to contain multiple As-bearing mineral species, including Fe-As weathering products. The As species present in the dust were similar to those observed in the near-surface tailings. The action of vehicles on the tailings surface may disaggregate material cemented with Fe arsenate and contribute additional fine-grained As-rich particles to airborne dust. Results from this study can be used to help assess the potential human health risks associated with exposure to airborne particles from mine tailings.

  19. Exposure to airborne metals and particulate matter and risk for youth adjudicated for criminal activity

    SciTech Connect (OSTI)

    Haynes, Erin N., E-mail: Erin.Haynes@uc.edu [College of Medicine, Department of Environmental Health, University of Cincinnati, Cincinnati, OH 45267 (United States); Chen, Aimin, E-mail: Aimin.Chen@uc.edu [College of Medicine, Department of Environmental Health, University of Cincinnati, Cincinnati, OH 45267 (United States)] [College of Medicine, Department of Environmental Health, University of Cincinnati, Cincinnati, OH 45267 (United States); Ryan, Patrick, E-mail: Patrick.Ryan@uc.edu [College of Medicine, Department of Environmental Health, University of Cincinnati, Cincinnati, OH 45267 (United States)] [College of Medicine, Department of Environmental Health, University of Cincinnati, Cincinnati, OH 45267 (United States); Succop, Paul, E-mail: Paul.Succop@uc.edu [College of Medicine, Department of Environmental Health, University of Cincinnati, Cincinnati, OH 45267 (United States)] [College of Medicine, Department of Environmental Health, University of Cincinnati, Cincinnati, OH 45267 (United States); Wright, John, E-mail: John.Wright@uc.edu [College of Education, Criminal Justice, and Human Services, University of Cincinnati, Cincinnati, OH 45221 (United States)] [College of Education, Criminal Justice, and Human Services, University of Cincinnati, Cincinnati, OH 45221 (United States); Dietrich, Kim N., E-mail: Kim.Dietrich@uc.edu [College of Medicine, Department of Environmental Health, University of Cincinnati, Cincinnati, OH 45267 (United States)

    2011-11-15T23:59:59.000Z

    Antisocial behavior is a product of multiple interacting sociohereditary variables, yet there is increasing evidence that metal exposure, particularly, manganese and lead, play a role in its epigenesis. Other metals, such as arsenic, cadmium, chromium, and mercury, and exposure to traffic-related air pollution, such as fine particulate matter ({<=}2.5 {mu}m) have been associated with neurological deficits, yet largely unexplored with respect to their relationship with delinquent behavior. The purpose of this study is to evaluate the ecological relationship between county-wide reported airborne emissions of air metals, particulate matter, and youth adjudicated for criminal activity. Metal exposure data were collected from the Environmental Protection Agency AirData. Population statistics were obtained from the United States Census 2000 and adjudication data was obtained from the Courts of Common Pleases from each Ohio County. Simple correlations were calculated with the percentage of adjudications, all covariates, and estimated metal air emissions. Separate negative binomial regression models for each pollutant were used to provide an estimated risk ratio of pollutant emissions on the risk of adjudication for all Ohio counties adjusting for urban-rural residence, percentage of African Americans, median family income, percentage of family below poverty, percentage of high school graduation in 25 years and older populations, and population density. Metal emissions and PM in 1999 were all correlated with adjudication rate (2003-2005 average). Metal emissions were associated with slightly higher risk of adjudication, with about 3-4% increased risk per natural log unit of metal emission except chromium. The associations achieved statistical significance for manganese and mercury. The particulate matter {<=}2.5 and {<=}10 {mu}m emissions had a higher risk estimate, with 12% and 19% increase per natural log unit emission, respectively, and also achieved statistical significance. In summary, airborne exposure to manganese, mercury, and particulate matter are associated with increased risk of adjudication. Causality cannot be proven in observational studies such as this one, but the association warrants further examination in other research studies. Comprehensive epidemiologic investigations of metal exposure in pediatric populations should include social health outcomes, including measures of delinquent or criminal activity. Furthermore, the influence of metals on the neurotoxic pathway leading to delinquent activity should be further explored. - Highlights: Black-Right-Pointing-Pointer We evaluate the relationship between air pollutants and adjudication. Black-Right-Pointing-Pointer Manganese, mercury, and particulate matter are associated with risk of adjudication. Black-Right-Pointing-Pointer Further research of metal exposure should include social health outcomes.

  20. Proton decay in the super-world

    SciTech Connect (OSTI)

    Raby, S.

    1986-01-01T23:59:59.000Z

    Predictions are elaborated for nucleon decay in supersymmetric grand unified theories (SUSY GUT's). A minimal SU/sub 5/ SUSY GUT is described, as well as SU/sub 5/ breaking. The low energy theory and breaking of supersymmetry are discussed. It is concluded that nucleon decay in SUSY GUT's would be dominated by p ..-->.. K/sup +/anti nu/sub ..mu../ and n ..-->.. K/sup 0/anti nu/sub ..mu../. There are ranges in parameter space for which other decay modes may be significant or may even dominate, it is found. It is noted that minimal SUSY GUT's typically predict a value of sin/sup 2/theta/sub w/ of order .233. 20 refs., 7 figs. (LEW)