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Absorbed-Dose / Dose-Rate Dependence Studies for the Alanine-EPR Dosimetry System

Published

Author(s)

Marc F. Desrosiers, James M. Puhl

Abstract

Over the course of the last decade, routine monitoring of the alanine dosimetry system revealed a small but significant observation that, after examination, led to the characterization of a previously unknown absorbed-dose-dependent, dose-rate effect for the alanine system. The newly discovered rate effect is of potential concern for electron-beam dosimetry, since electron beam dosimetry typically derives its traceability to national standards through comparisons to gamma-ray calibrations of the dosimetry system. The largest discrepancy in source dose rates is between gamma-ray sources and electron beam accelerators. The influence of temperature on the alanine rate effect is an important first step in preparation for a comparison study between electron-beam and gamma-ray dosimetry. Here, new data is presented on the influence of irradiation temperature (from -40 °C to +50 °C) on the dose rate effect measured at 50 kGy.
Citation
Radiation Physics and Chemistry
Volume
78

Keywords

alanine, dosimeter, dosimetry, electron paramagnetic resonance, electron beam, gamma ray, ionizing radiation, irradiation temperature
Created September 1, 2009, Updated August 13, 2018