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Topic Area: Radiation Physics
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Displaying records 31 to 40 of 85 records.
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31. ITRAP+10 Spectroscopic Radiation Portal Monitor Testing
Topic: Radiation Physics
Published: 11/14/2013
Authors: Anne Louise Sallaska, Leticia S Pibida, Huaiyu H Chen-Mayer, Luc Murphy, Christina Ward
Abstract: The Illicit Trafficking Radiation Assessment Program (ITRAP+10) is an international effort of the Department of Homeland Security‰s Domestic Nuclear Detection Office (DHS/DNDO), the European Commission‰s Joint Research Center (EC-JRC), and the In ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914269

32. Improved Determination of the Neutron Lifetime
Topic: Radiation Physics
Published: 12/2/2013
Authors: Jeffrey S Nico, A. T. Yue, Maynard S Dewey, David McLarty Gilliam, G L. Greene, A. Laptev, W M. Snow, F. E Wiefeldt
Abstract: The most precise determination of the neutron lifetime using the beam method was completed in 2005 and reported a result of tau_n = (886.3 ± 1.2 [stat] ± 3.2 [sys]) s. The dominant uncertainties were attributed to the absolute determination of the f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914740

33. 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

34. In-situ Polarized 3He system for the Magnetism Reflectometer at the Spallation Neutron Source
Topic: Radiation Physics
Published: 7/2/2012
Authors: Thomas R Gentile, X Tong, C Y Jiang, V Lauter, H. Ambaye, D. Brown, L Crow, R J Goyette, W-T Lee, A. Parizzi
Abstract: We report on the in-situ polarized 3He neutron polarization analyzer developed for the time-of-flight Magnetism Reflectometer (MAGICS) at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL). Using the spin exchange optical ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911438

35. Influence of phantom materials on the energy dependence of LiF:Mg,Ti exposed to low-energy x-rays
Topic: Radiation Physics
Published: 7/8/2014
Authors: Ronaldo Minniti, G. Massillon, Christopher Graham Soares
Abstract: Thermoluminescent (TL) dosimeters, particularly LiF:Mg,Ti (commercially known as TLD-100), are widely used to estimate the absorbed dose received by patients during diagnostic and/or treatment processes and for convenience, measurements are usually m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913210

36. Justification of Shielding Requirements for Plutonium Sources
Series: Technical Note (NIST TN)
Report Number: 1758
Topic: Radiation Physics
Published: 9/12/2012
Authors: Leticia S Pibida, Michael P Unterweger
Abstract: This report provides a justification for shielding plutonium sources when testing radiation detection instruments against standard performance requirements and test methods. The use of copper as a shielding material is proposed to provide compara ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912144

37. Key Comparison BIPM.RI(I)-K2 of the air-kerma standards of the NIST, USA and the BIPM in low-energy x-rays
Topic: Radiation Physics
Published: 3/23/2012
Authors: C Michelle O'Brien, D T Burns, C Kessler
Abstract: A key comparison has been made between the air-kerma standards of the NIST and the BIPM in the low-energy x ray range. The results show the standards to be in general agreement at the level of the combined standard uncertainty for the comparison of 4 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910332

38. 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

39. Key comparison BIPM.RI(I)-K7 of the air-kerma standards of the NIST, USA and the BIPM in mammography x-rays.
Topic: Radiation Physics
Published: 8/1/2011
Authors: C Michelle O'Brien, C. Kessler, D T Burns
Abstract: A first key comparison has been made between the air-kerma standards of the NIST and the BIPM in mammography x ray beams. The results show the standards to be in agreement at the level of the combined standard uncertainty of 3.2 parts in 10x3. The re ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908636

40. Laboratories New to the ICRM
Topic: Radiation Physics
Published: 3/4/2012
Authors: Lisa R Karam, Marios J. Anagnostakis, Arunas Gudelis, Pujadi Marsoem, Alexander Mauring, Gatot Wurdiyanto, Ulku Yucel
Abstract: The Scientific Committee of the ICRM decided, for the 2011 Conference, to present laboratories that are at a key developmental stage in establishing, expanding or applying radionuclide metrology capabilities. The expansion of radionuclide metrology ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910083



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