^(125)I种子源自屏蔽效应研究  

Self-shielding effect of ^(125)I brachytherapy seeds

作　　者：党宇峰[1] 何佳恒[1] 姜林[1] 马宗平[1] 王静[1] 蹇源[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900

出　　处：《核技术》2011年第12期926-928,共3页Nuclear Techniques

基　　金：中国工程物理研究院军民两用资助(JM200909)项目;中国工程物理研究院发展基金资助(2009B0301028)项目

摘　　要：采用直接法和间接法测定了钯化法工艺条件下制备的^(125)I种子源源芯的自屏蔽系数。结果表明,吸附基材表面积一定的情况下,吸附液初始活度的大小不影响基材的吸附率,^(125)I种子源源芯的自屏蔽系数均维持在64%左右,NaS_2O_3的加入对自屏蔽效应系数有较大程度的降低。In this work, the self-shielding effect of 125 I seed source was investigated. Adopting the direct and indirect methods, the self-shielding coefficients of 125 I seed source core, which were prepared under technical conditions of self-established palladium method, were measured. The results show that with certain surface areas of the adsorbing basal materials, the initial activities of adsorbing solution do not affect adsorbing rates of the basal materials, and the self-shielding coefficients of 125 I seed source core are about 64%, and the addition of NaS2O3 makes the self-shielding effect coefficients decline greatly.

关 键 词：自屏蔽 种子源 

分 类 号：TL929[核科学技术—核燃料循环与材料] R817.9[医药卫生—影像医学与核医学]