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Topic Area: Radiation Physics

Displaying records 21 to 30 of 72 records.
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21. 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

22. 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

23. Lattice damage in superconducting microcalorimeter detectors
Topic: Radiation Physics
Published: 6/3/2013
Authors: Robert Daniel Horansky, Joel Nathan Ullom, Michael W Rabin
Abstract: There is currently significant interest in using superconducting detectors for measurement of ion kinetic energies. Unprecedented resolution is possible with an order of magnitude improvement over semiconductors. Superconducting detectors are now ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912643

24. 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

25. 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 L. 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

26. Tungsten L Transition Line Shapes and Energy Shifts Resulting from Ionization in Warm Dense Matter
Topic: Radiation Physics
Published: 4/18/2013
Authors: Lawrence T Hudson, John F Seely, Bruce V. Weber, D. G. Phipps, N. R. Pereira, D Mosher, K. Slabkowska, M. Polasik, J Rzadkiewicz, S Hansen, Uri Feldman, Joseph W. Schumer
Abstract: High resolution spectra of the W L transitions in the energy range 8 keV to 12 keV from warm dense plasmas generated by the Naval Research Laboratory‰s Gamble III pulsed power machine were recorded by a transmission-crystal x-ray spectrometer with ± ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913208

27. 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

28. 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

29. 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

30. 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



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