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核农学报  2013 

辐照孜然的热释光法鉴定及原初吸收剂量的估算

DOI: 10.11869/hnxb.2013.08.1143, PP. 1143-1149

Keywords: 辐照,孜然,热释光,发光曲线,附加剂量法,鉴定

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Abstract:

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0~6.47kGy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1kGy范围内。因此,TL法能够定性和定量地鉴定辐照孜然。

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