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

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Author(s): Marc F. Desrosiers; James M. Puhl;
Title: Absorbed-Dose / Dose-Rate Dependence Studies for the Alanine-EPR Dosimetry System
Published: September 01, 2009
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
Pages: pp. 461 - 464
Keywords: alanine; dosimeter; dosimetry; electron paramagnetic resonance; electron beam; gamma ray; ionizing radiation; irradiation temperature
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