辐照孜然的热释光法鉴定及原初吸收剂量的估算  

Identification and Estimation of the Initial Absorbed Dose in Irradiated Cumin by Thermoluminescence

作　　者：李伟明[1] 哈益明[1] 周洪杰[1] 

机构地区：[1]中国农业科学院农产品加工研究所/农业部农产品加工综合性重点实验室,北京100193

出　　处：《核农学报》2013年第8期1143-1149,共7页Journal of Nuclear Agricultural Sciences

基　　金：农业部公益性行业科技专项(201103007);国防科工局核能开发科研专项(20091228)

摘　　要：以孜然为对象,借助扫描电镜和X-射线能谱分析(SEM-EDX)的方法测定孜然样品中掺杂的多种矿物质的成分组成和含量;采用热释光(TL)技术研究孜然在0～6.47 kGy剂量范围内2次发光曲线的特征和比值,并采用附加剂量法估测孜然样品的原初吸收剂量。结果表明:孜然中分离出的矿物质主要含有石英(SiO2)和钾长石((KAlSi3O8);根据检测孜然样品分离的矿物质的第1次发光曲线的形状和性质即可以鉴定样品是否经过辐照处理;附加剂量法能够用于样品原初剂量的估算,拟合估算出的每个样品的剂量值与原初剂量的偏差均在1 kGy范围内。因此,TL法能够定性和定量地鉴定辐照孜然。The cumin was employed as experimental material to determine the composition of the separated poly-minerals from the cumin sample by scanning electron microscopy（SEM） and energy dispersive X-ray spectrometer（EDX）.The feature of the two glow curves and the ratios were investigated by thermoluminescence（TL） in the range of 0 to 6.47 kGy and the initial absorbed dose of cumin was assessed using the dose-additive method.The EDX spectrum showed that the poly-minerals was mainly composed of quartz（SiO2） and K-feldspars（KAlSi3O8） and the first TL glow curve structure and characteristics could be used to identify irradiated cumin.The dose additive method could be used for a reliable evaluation of the absorbed dose in cumin and the deviation between the initial dose and the estimated dose was all less than 1 kGy.The TL technique could be used as a qualitative and quantitative method to indentify irradiated cumin.

关 键 词：辐照 孜然 热释光 发光曲线 附加剂量法 鉴定 

分 类 号：TS264[轻工技术与工程—发酵工程]