Gaza R, Yukihara E G, McKeever S W S
Department of Physics, Oklahoma State University, 145 Physical Sciences II, Stillwater, OK 74078-3072, USA.
Radiat Prot Dosimetry. 2006;120(1-4):354-7. doi: 10.1093/rpd/nci574. Epub 2006 Apr 27.
This paper presents two different approaches of quantifying the optically stimulated luminescence (OSL) response of Al(2)O(3):C to high-energy heavy charged particles (HCPs). The OSL efficiency of Al(2)O(3):C exposed to different HCPs is defined as the sensitivity of the material to HCPs normalised by the sensitivity to gamma. In this paper, we investigate the possibility of introducing a 'mean efficiency' eta(mean), which when used in conjunction with the total gamma dose D(gamma) measured for a mixed radiation exposure allows for the determination of the absorbed dose without the need to determine the individual contributions of different types of radiation to the OSL signal. We tested the hypothesis that information regarding the 'mean efficiency' eta(mean) is contained in the shape of the OSL decay curve, using several approaches in the analysis of the OSL data. This analysis was applied to various mixed field irradiations performed at the HIMAC facility, Chiba, Japan. The results of this analysis are discussed.
本文介绍了两种不同的方法来量化Al(2)O(3):C对高能重带电粒子(HCPs)的光激发发光(OSL)响应。暴露于不同HCPs的Al(2)O(3):C的OSL效率定义为材料对HCPs的灵敏度除以对γ射线的灵敏度。在本文中，我们研究了引入“平均效率”η(mean)的可能性，当它与混合辐射暴露测量的总γ剂量D(γ)结合使用时，无需确定不同类型辐射对OSL信号的单独贡献就可以确定吸收剂量。我们使用几种分析OSL数据的方法，检验了关于“平均效率”η(mean)的信息包含在OSL衰减曲线形状中的假设。该分析应用于在日本千叶的HIMAC设施进行的各种混合场辐照。讨论了该分析的结果。
