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Topic Area: Radiation Physics
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Displaying records 21 to 30 of 74 records.
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21. Effect of Neutron Irradiation on Dosimetric Properties of the TLD-600H (Lif6:Mg,Cu,P)
Topic: Radiation Physics
Published: 11/1/2011
Authors: A A Romanyukha, Ronaldo Minniti, M. Moscovitch, Alan K Thompson, F. Trompier, Ronald Colle, A Sucheta, S. P. Voss, L. A. Benevides
Abstract: Ideally, dosimeters should measure the dose without their dosimetric properties being affected by the radiation type being measured. Industry-wide occupational radiation workers that can be potentially exposed to neutron radiation fields are routine ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905722

22. Effects of Dose Fractionation on the Response of Alanine Dosimetry
Topic: Radiation Physics
Published: 6/28/2014
Authors: Marc F Desrosiers, John Logar, Brad Lundahl
Abstract: Alanine dosimetry is well established as a transfer standard and is becoming more prevalently used as a routine dosimetry system for radiation processing. Many routine measurement applications in radiation processing involve absorbed dose measurement ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916033

23. Effects of high intensity neutron flux on in-situ spin-exchange optical pumping of He-3
Topic: Radiation Physics
Published: 9/17/2009
Authors: Thomas R. Gentile, E Babcock, Stephen Boag, C. Becham, T E. Chupp, G L. Jones, A K. Petukhov, T G Walker
Abstract: Prior studies revealed neutron beam-induced alkali-metal spin relaxation in 3He cells polarized in-situ by spin-exchange optical pumping. These effects are minor for neutron beams of low to moderate intensity, but become important at the highest ne ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907869

24. Efficiency calibrations of cylindrically bent transmission crystals in the 20 keV to 80 keV x-ray range
Topic: Radiation Physics
Published: 4/15/2011
Authors: Lawrence T Hudson, C Michelle O'Brien, Uri Feldman, Stephen M. Seltzer, Hye-Sook Park, John F Seely
Abstract: Two quartz (10-11) crystals were cylindrically bent to 25.4 cm radius of curvature and were mounted in identical Cauchois type transmission spectrometers, and the crystal diffraction efficiencies were measured to 5 % absolute accuracy using narrow ba ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907535

25. Emergency Radiobioassay Preparedness Exercises through the NIST Radiochemistry Intercomparison Program (NRIP)
Topic: Radiation Physics
Published: 8/1/2011
Authors: Svetlana Nour, Jerome LaRosa, Kenneth G Inn
Abstract: The present challenge for the international radiobioassay community is to analyze contaminated samples rapidly while maintaining high quality results. NIST runs a radiobioassay measurement traceability testing program to evaluate the radioanalytical ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906938

26. Energetic Photon Spectra from Targets Irradiated by Picoseconds Lasers
Topic: Radiation Physics
Published: 4/30/2011
Authors: Lawrence T Hudson, John F Seely, Csilla Szabo, Uri Feldman, Hui Chen, Albert Henins
Abstract: Photon spectra in the energy range 60 keV to 1 MeV were recorded from targets irradiated by the LLNL Titan and LLE EP picosecond lasers. The radiation consisted of K shell radiation, Bremsstrahlung radiation from MeV electrons, and preliminary eviden ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907778

27. Extending transmission crystal x-ray spectroscopy to moderate-intensity laser driven sources
Topic: Radiation Physics
Published: 3/17/2012
Authors: Lawrence T Hudson, J. Y. Mao, L. M. Chen, John F Seely, L. Zhang, Y. Q. Sun, X. X. Lin, J. Zhang
Abstract: We present spectroscopic measurements of characteristic Kα and Kβ emissions from Mo targets irradiated by a 100 fs, 200 mJ, Ti: sapphire laser with intensity of 1017 W/cm2 to 1018 W/cm2 per pulse. This research pursues novel x-ray sources f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910310

28. High contract femtosecond laser-driven intense hard X-ray source for imaging application
Topic: Radiation Physics
Published: 11/18/2009
Authors: Lawrence T Hudson, L.M Chen, W.M. Wang, M. Kando, F Liu, X.X. Lin, J.L Ma, Y.T. Li, S.V. Bulanvo, T. Tajima, Y. Kato, Z.M. Sheng, J Zhang
Abstract: In this report we address the current situation of laser-driven hard X-ray sources for imaging applications,especially the saturation of X-ray conversion efficiency and the serious impact upon imaging quality.By employing high contrast laser pulses ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907448

29. High-resolution K-shell spectra from laser excited molybdenum plasma
Topic: Radiation Physics
Published: 11/1/2013
Authors: Lawrence T Hudson, C.I Szabo, P Indelicatio, John F Seely, T Ma
Abstract: X-ray spectra from Molybdenum plasmas were recorded by a Cauchois-type cylindrically bent Transmission Crystal Spectrometer (TCS). The absolutely calibrated spectrometer provides an unprecedented resolution of inner shell transitions (K x-ray radiati ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912283

30. 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



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