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You searched on: Topic Area: Radiation Physics

Displaying records 11 to 20 of 22 records.
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11. Improving quantitative neutron radiography through image restoration
Topic: Radiation Physics
Published: 7/20/2013
Authors: Daniel S Hussey, Elias M Baltic, Kevin J Coakley, David L Jacobson
Abstract: This in-situ study examines the water content in polymer electrolyte fuel cells (PEFCs) using neutron radiography. Various conditions such as different polytetraflouroethylene (PTFE) loadings in the gas diffusion media including the micro-porous laye ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910015

12. Recommendations for Improving Consistency in the Radiation Fields used During Testing of Radiation Detection Instruments for Homeland Security Applications
Series: Journal of Research (NIST JRES)
Report Number: 118.014
Topic: Radiation Physics
Published: 5/28/2013
Authors: Matthew Merril Mille, Bruce R Norman, Leticia S Pibida
Abstract: Several measurements and calculations were performed to illustrate the differences that can be observed in the determination of exposure rate or ambient dose equivalent rate used for testing radiation detection systems against consensus standard. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913253

13. Wide Angle Polarization Analysis with Neutron Spin Filters
Topic: Radiation Physics
Published: 4/29/2013
Authors: Qiang NMN Ye, Thomas R Gentile, Jeffrey R. Anderson, Collin Leslie Broholm, Wangchun Chen, Z DeLand, Ross W. Erwin, C. B. Fu, John E Fuller III, Aaron V Kirchhoff, J. A. Rodriguez-Rivera, V. Thampy, T G Walker, Shannon Watson
Abstract: We report substantial improvements in a compact wide angle neutron spin filter system that was recently employed on the Multi-Axis Crystal Spectrometer at the Center for Neutron Research at the U.S. National Institute of Standards and Technology. The ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911975

14. Characterization of a 6Li-loaded liquid organic scintillator for fast neutron spectrometry and thermal neutron detection
Topic: Radiation Physics
Published: 3/24/2013
Authors: Jeffrey S Nico, C. D. Bass, E J Beise, Craig Heimbach, T. Langford
Abstract: We present the characterization of a liquid scintillator incorporating an aqueous solution of enriched lithium chloride to produce a scintillator with 0.40% 6Li. We report on its performance in terms of optical properties and neutron response. We inc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911570

15. Neutron Test Results of Preliminary Measurements and Calculations Using a Handheld Instrument
Series: Technical Note (NIST TN)
Report Number: 1788
Topic: Radiation Physics
Published: 3/18/2013
Authors: Leticia S Pibida, Craig Heimbach, Bruce R Norman, Alan K Thompson, Maynard S Dewey
Abstract: Initial neutron measurements and calculations were performed to investigate the response of handheld radionuclide identifiers (RIDs) to neutron sources with different moderators/scattering conditions
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913333

16. Validation Testing of Standard Requirements for Backpack-type Radiation Detectors
Series: Technical Note (NIST TN)
Report Number: 1789
Topic: Radiation Physics
Published: 3/18/2013
Authors: Leticia S Pibida, Bruce R Norman
Abstract: Two gross count and one radionuclide identification backpack-type radiation detectors (BRDs) were used to validate radiological test requirements listed in the Domestic Nuclear Detection Office (DNDO), Technical Capability Standard (TCS) for BRDs ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913250

17. Characterization of the NIST Shellfish Standard Reference Material 4358
Topic: Radiation Physics
Published: 3/1/2013
Authors: Svetlana Nour, Kenneth G Inn, James J Filliben, Hank dan der Gaast, Lee Chung Men, M.D. Calmet, P Povinec, Y Takata, M. Wisdom, K. Nakamura, Pia Vesterbacka, Ching-Chung Huang, S M Vakulovsky
Abstract: A new Shellfish Standard Reference Material (SRM 4358) was developed at the National Institute of Standards and Technology (NIST) via an international intercomparison project that involved 12 laboratories-participants from 9 countries (Table 1). This ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910813

18. Key comparison BIPM.RI(I)-K6 of the standards for absorbed dose to water of the NIST, USA and BIPM in accelerator photon beams
Topic: Radiation Physics
Published: 1/23/2013
Authors: Ronald E Tosh, S Picard, D T Burns, P Roger, Fred B Bateman, Huaiyu H Chen-Mayer
Abstract: A comparison of the dosimetry for accelerator photon beams was carried out between the National Institute of Standards and Technology (NIST) and the Bureau International des Poids et Mesures (BIPM) in September and October 2010. The comparison was ba ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913069

19. Standardization of Broadband UV Measurements
Topic: Radiation Physics
Published: 1/1/2013
Author: George P Eppeldauer
Abstract: The CIE standardized rectangular-shape UV response functions can be realized only with large spectral mismatch errors. The spectral power-distribution of UV sources is not standardized. Accordingly, the readings of different types of UV meters, even ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913173

20. Search for a T-odd, P-even Triple Correlation in Neutron Decay
Topic: Radiation Physics
Published: 9/14/2012
Authors: Jeffrey S Nico, T E. Chupp, K P Coulter, R L Cooper, S. J. Freeman, B. K. Fujikawa, A. Garcia, G L. Jones, Hans P Mumm, Alan K Thompson, C A Trull, F. E Wiefeldt, J. F. Wilkerson
Abstract: Time-reversal-invariance (T) violation, or equivalently, assuming charge-conjugation-parity-time-reversal (CPT) invariance, CP violation may explain the observed cosmological baryon asymmetry as well as signal physics beyond the Standard Model. In th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911424



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