Two dimensional measurement of natural radioactivity of granitic rocks by photostimulated luminescence technique
Two dimensional measurement of natural radioactivity of granitic rocks by photostimulated luminescence technique
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光激发光技术二维测量花岗岩天然放射性
DOI：
10.2343/geochemj.34.1
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发表时间：
2000
影响因子：
0.8
通讯作者：
T. Chida
中科院分区：
文献类型：
--
作者：
M. Hareyama;N. Tsuchiya;M. Takebe;T. Chida
利用成像板对天然辐照花岗岩产生的辐射进行了二维测量，成像板是一种涂有光激励荧光粉(BaFBr：Eu2+)的存储薄膜。用成像板获得了薄片等小体积试件的辐射图像。花岗岩的辐照图像是不均匀的，单位面积的光激励发光强度主要转化为积分剂量，随着岩石中钾含量的增加而增加。研究结果表明，40K解体是花岗岩的主要辐射源。成像板是评价地质材料天然放射性性质的一种新的研究工具，可作为天然放射性的半定量二维剂量计。
Two-dimensional measurement of radiation produced by natural irradiation of granitic rocks was performed by the use of an imaging plate, which is a storage film coated with photostimulated phosphor (BaFBr:Eu2+). Radiation images of small volume specimens, such as thin sections were obtained with the imaging plate. Irradiation images of granitic rocks are inhomogeneous and the intensity of photostimulated luminescence per unit area, which is principally converted into the integrated dose, increases with the increasing potassium content in the rocks. The results of the present study indicate that the disintegration of 40K is the dominant radiation source of granitic rocks. The imaging plate is a new research tool for the evaluation of the natural radioactive properties of geological materials and is applicable as a semi-quantitative two-dimensional dosimeter for natural radioactivity.