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Topic Area: Radiation Physics
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1. A Comparison of Harwell & FWT Alanine Temperature Coefficients for 25 °C to 80 °C
Series: Journal of Research (NIST JRES)
Report Number: 117.007
Topic: Radiation Physics
Published: 5/1/2012
Authors: Marc F Desrosiers, Anne M. (Anne Marie) Forney, James M Puhl
Abstract: Dosimeters used to monitor industrial irradiation processing commonly experience significant temperature rises that must be considered in the dose analysis stage. The irradiation-temperature coefficient for a dosimetry system is derived from the ...

2. A Dosimetric Uncertainty Analysis for Photon-Emitting Brachytherapy Sources: Report of the AAPM Task Group No. 138 and GEC-ESTRO
Topic: Radiation Physics
Published: 2/1/2011
Authors: Larry A DeWerd, Geoffrey S Ibbott, Ali S Meigooni, Michael G Mitch, Mark J Rivard, Kurt E Stump, Bruce R Thomadsen, Jack L. Venselaar
Abstract: This report addresses uncertainties pertaining to brachytherapy source dosimetry. The ISO Guide to the Expression of Uncertainty in Measurement (GUM) and the NIST Technical Note 1297 are taken as reference standards for uncertainty formalism. Uncer ...

3. A method for organic/inorganic differentiation using an x-ray forward/backscatter personnel scanner
Topic: Radiation Physics
Published: 9/10/2013
Authors: Jack Leigh Glover, Lawrence T Hudson
Abstract: A method is proposed for performing organic/inorganic materials discrimination using an x-ray forward/backscatter scanner. The method is demonstrated using a commercially available personnel security-screening system and requires only image post proc ...

4. Absolute measurements of x-ray backlighter sources at energies above 10 keVa)
Topic: Radiation Physics
Published: 2/1/2012
Authors: Lawrence T Hudson, B.R. Maddox, H.S. Parks, B A Remington, C. Chen, S Chen, S. T. Prisbrey, A. Comley, C A Back, C. Szabo, John F Seely, Uri Feldman, Stephen Michael Seltzer, M. J. Haugh, Z. Ali
Abstract: Line emission and broadband x-ray sources with x-ray energies above 10 keV have been investigated using a range of calibrated x-ray detectors for use as x-ray backlighters in high energy density (HED) experiments. The conversion efficiency of short- ...

5. An Automated Ionization Chamber for Secondary Radioactivity Standards
Topic: Radiation Physics
Published: 12/8/2009
Author: Ryan P Fitzgerald
Abstract: We report on the operation and characterization of a new ionization chamber system, called AUTOIC, featuring a commerical digital electrometer and a commerical robotic sample changer. The ralative accuracy of the electrometer was improved significan ...

6. Asymmetrically cut crystal pair as x-ray magnifier for imaging at high intensity laser facilities.
Topic: Radiation Physics
Published: 10/20/2010
Authors: Lawrence T Hudson, Albert Henins, C.I Szabo, Uri Feldman, John F Seely, John J Curry
Abstract: The potential of an x-ray magnifier prepared from a pair of asymmetrically cut crystals is studied to explore high energy x-ray imaging capabilities at high intensity laser facilities. OMEGA-EP and NIF when irradiating mid and high Z targets can be ...

7. CT head-scan dosimetry in an anthropomorphic phantom and associated measurement of ACR accreditation-phantom imaging metrics under clinically representative scan conditions
Topic: Radiation Physics
Published: 7/24/2013
Authors: Ronaldo Minniti, Claudia Brunner, Stanley H. Stern, Marie I. Parry, Kish Chakrabarti
Abstract: The purpose of this work was to measure radiation absorbed dose and its distribution in an anthropomorphic head phantom under clinically representative scan conditions in three widely-used computed tomography (CT) scanners, and to relate those dose v ...

8. Calculations of electron stopping powers for 41 elemental solids over the 50 eV to 30 keV range with the full Penn algorithm
Topic: Radiation Physics
Published: 9/19/2011
Authors: Cedric John Powell, David R. Penn, H Shinotsuka, Shigeo Tanuma
Abstract: We present collision electron stopping powers (SPs) for 41 elemental solids (Li, Be, graphite, diamond, glassy C, Na, Mg, Al, Si, K, Sc, Ti, V, Cr, Fe, Co, Ni, Cu, Ge, Y, Nb, Mo, Ru, Rh, Pd, Ag, In, Sn, Cs, Gd, Tb, Dy, Hf, Ta, W, Re, Os, Ir, Pt, Au, ...

9. 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 ...

10. 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 ...

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