Sholom S, McKeever S W S
Radiation Dosimetry Group, Department of Physics, Oklahoma State University, Stillwater, OK 74078, USA
Radiation Dosimetry Group, Department of Physics, Oklahoma State University, Stillwater, OK 74078, USA.
Radiat Prot Dosimetry. 2016 Dec;172(1-3):139-144. doi: 10.1093/rpd/ncw177. Epub 2016 Jul 13.
Several table vitamins, minerals and L-lysine amino acid have been preliminarily tested as potential emergency dosemeters using electron paramagnetic resonance (EPR) and optically stimulated luminescence (OSL) techniques. Radiation-induced EPR signals were detected in samples of vitamin B2 and L-lysine while samples of multivitamins of different brands as well as mineral Mg demonstrated prominent OSL signals after exposure to ionizing radiation doses. Basic dosimetric properties of the radiation-sensitive substances were studied, namely dose response, fading of the EPR or OSL signals and values of minimum measurable doses (MMDs). For EPR-sensitive samples, the EPR signal is converted into units of dose using a linear dose response and correcting for fading using the measured fading dependence. For OSL-sensitive materials, a multi-aliquot, enhanced-temperature protocol was developed to avoid the problem of sample sensitization and to minimize the influence of signal fading. The sample dose in this case is also evaluated using the dose response and fading curves. MMDs of the EPR-sensitive samples were below 2 Gy while those of the OSL-sensitive materials were below 500 mGy as long as the samples are analyzed within 1 week after exposure.
已经使用电子顺磁共振（EPR）和光激发发光（OSL）技术对几种食用维生素、矿物质和L-赖氨酸氨基酸作为潜在的应急剂量计进行了初步测试。在维生素B2和L-赖氨酸样品中检测到了辐射诱导的EPR信号，而不同品牌的多种维生素样品以及矿物质镁在暴露于电离辐射剂量后显示出显著的OSL信号。研究了辐射敏感物质的基本剂量学特性，即剂量响应、EPR或OSL信号的衰减以及最小可测量剂量（MMD）值。对于EPR敏感样品，使用线性剂量响应将EPR信号转换为剂量单位，并使用测量的衰减依赖性校正衰减。对于OSL敏感材料，开发了一种多等分、高温增强方案，以避免样品敏化问题并最小化信号衰减的影响。在这种情况下，样品剂量也使用剂量响应和衰减曲线进行评估。只要在暴露后1周内对样品进行分析，EPR敏感样品的MMD低于2 Gy，而OSL敏感材料的MMD低于500 mGy。
