用两种人体胸腔模型对超铀元素活体测量系统刻度的结果及其比较

CALIBRATION OF IN VIVO MEASUREMENT SYSTEM FOR TRANSURANIC ELEMENTS AND RESULTS COMPARISON USING LLNL AND JAERI PHANTOMS

本文报道用ＬＬＮＬ胸腔模型和ＪＡＥＲＩ躯干模型对由双层晶体探测器构成的超铀元素活体测量系统进行效率刻度的结果及其比较。实验结果表明，用ＪＡＥＲＩ模型得到的肺中２４１Ａｍ的计数效率比ＬＬＮＬ模型的高７％～１０％；而对肺中２３８，２３９Ｐｕ用ＬＬＮＬ模型得到的计数效率比用ＪＡＥＲＩ模型的高７％～２０％。

This paper reports some experimental results of efficiency calibration and comparison between them using LLNL and JAERI torso phantoms for in vivo monitoring system involving a phoswich detector for measurement of transuranic elements. The experimental results show that the lung counting efficiencies obtainted using JAERI torso phantom are 7%￣10% higher than that obtainted using LLNL phantom for 241 Am lung sets, and for 238, 239 Pu lung sets, the lung counting efficiencies from LLNL phantom are 7%￣20% higher than that from JAERI phantom. (