Advancements in accuracy of the alanine EPR dosimetry system Part III: Usefulness of an adjacent reference sample

被引:41
作者
Nagy, V [1 ]
Sleptchonok, OF
Desrosiers, MF
Weber, RT
Heiss, AH
机构
[1] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA
[2] Bruker Instruments Inc, EPR Div, Billerica, MA 01821 USA
关键词
alenine dosimetry; EPR; ESR; adjacent reference sample; accuracy; ruby;
D O I
10.1016/S0969-806X(00)00275-9
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
High stability of the radiation-induced radicals in alanine and the high reproducibility of alanine response to radiation make it possible to determine radiation doses accurately with Electron Paramagnetic Resonance (EPR) spectral analysis. Small uncontrollable variations of the EPR spectrometer sensitivity, however, can significantly deteriorate the accuracy of the method. The errors due to these variations I-an be eliminated or markedly decreased if an adjacent reference sample (such as a synthetic ruby crystal) is permanently present in the cavity, and if ratios of the alanine and ruby signal amplitudes are used throughout the dosimetric session instead of the absolute alanine amplitudes. This paper addresses methodological aspects of using such adjacent reference samples in alanine dosimetry and provides illustrations of the usefulness of this technique. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:429 / 441
页数:13
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