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Topic Area: Radiation Physics
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Displaying records 51 to 60 of 75 records.
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51. Noble Gas Excimer Scintillation Following Neutron Capture in Boron Thin Films
Topic: Radiation Physics
Published: 4/11/2014
Authors: Alan K Thompson, Jacob McComb, Charles W Clark, Michael A. Coplan, Mohamad Al-Sheikhly, Robert Edward Vest
Abstract: Far-ultraviolet (FUV) scintillation signals have been measured in heavy noble gases (argon, krypton, xenon) following boron-neutron capture (10B(n,α)7Li) in 10B thin films. The observed scintillation yields are comparable to the yields from some ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915257

52. Optimal filtering, record length, and count rate in transition-edge-sensor microcalorimeters
Topic: Radiation Physics
Published: 12/16/2009
Authors: William Bertrand Doriese, Gene C Hilton, Kent D Irwin, Francis Joseph Schima, Joel Nathan Ullom, Joseph S. Adams, Caroline A. Kilbourne
Abstract: In typical algorithms for optimally filtering transition-edge-sensor-microcalorimeter pulses, the average value of a filtered pulse is set to zero. The achieved energy resolution of the detector then depends strongly on the chosen length of the pulse ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903257

53. Pinhole X -ray camera photos of an ECR ion source plasma
Topic: Radiation Physics
Published: 11/1/2011
Authors: Lawrence T Hudson, Sandor Biri, E Takacs, R. Racz, J. Palinkas
Abstract: A 70 micrometer pinhole and an X-ray CCD camera in single photon counting mode were used to obtain spatially and spectral resolved images of an electron cyclotron resonance (ECR) ion source generated plasma. The method has good spatial resolution as ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907522

54. Polarized 3HE Spin Filters for Neutron Science
Topic: Radiation Physics
Published: 2/12/2014
Authors: Thomas R. Gentile, Wei-Chen N. Chen
Abstract: The large spin dependence of the absorption cross section for neutrons by 3He gas provides a method to polarize neutron beams. For certain applications, such polarized 3He-based neutron "spin filters" have advantages over conventional neutron optica ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914929

55. Post-Irradiation Study of the Alanine Dosimeter
Series: Journal of Research (NIST JRES)
Topic: Radiation Physics
Published: 7/14/2014
Author: Marc F Desrosiers
Abstract: Post-irradiation stability of high-dose dosimeters has traditionally been an important measurement influence quantity. Though the exceptional stability of the alanine dosimeter response with time has rendered this factor a non-issue for routine work ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914295

56. Probing the Water Content in Polymer Electrolyte Fuel Cells Using Neutron Radiography
Topic: Radiation Physics
Published: 5/8/2012
Authors: Daniel S Hussey, Jeffrey Mishler, Yun Wang, Rangachary Mukundan, Jacob Spendelow, Rodney Borup
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=910022

57. 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

58. Relationship between CTDI values and measured Peak Skin Dose (PSD)
Topic: Radiation Physics
Published: 7/16/2013
Authors: Ronaldo Minniti, Hugo de las Heras Gala, Sean Wilson, Chad Mitchell, Marlene Skopec, Claudia Brunner, Kish Chakrabarti
Abstract: In this work we relate the CT dose index volume (CTDIvol) readily displayed in all CT units with an actual Peak Skin Dose (PSD) value. Measurements of the CTDI and skin exposure were performed simultaneously using an ionization chamber and radiochrom ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910300

59. Reply to ,Comment on "Testing Three-body Quantum Electrodynamics with Trapped Ti20+ Ions: Evidence for a Z-Dependent Divergence between Experiment and Calculation"
Topic: Radiation Physics
Published: 4/12/2013
Authors: Lawrence T Hudson, C T Chantler, M N Kinnane, John D Gillaspy, A.T. Payne, L F Smale, Albert Henins, Joshua M Pomeroy, J A Kimpton, E Takacs, K Makonyi
Abstract: We find that Epp‰s [1] hypothesis - namely that the current experimental data set is well represented by a small constant or zero offset from the predictions of Artemyev et al. [2] - is not supported by standard statistical analysis. We find that add ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913384

60. Response of large area avalanche photodiodes to low energy X-rays
Topic: Radiation Physics
Published: 4/30/2012
Authors: Thomas R. Gentile, Uwe Arp, M J Bales, R Farrell
Abstract: For an experiment to study neutron radiative beta-decay, we operated large area avalanche photodiodes (APDs) at liquid nitrogen temperature to detect X-rays with energies between 0.2 keV and 15 keV. Whereas there are numerous reports of X-ray spect ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910652



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