摘要
本文使用了一种物理模型法来解析小样品Pu在600keV的Gamma能谱,得到核素的百分含量。物理模型法根据Gamma谱测量时射线出放射源后过滤吸收片最后被探测器探测的实际物理过程,把测量过程分为自吸收屏蔽、射线屏蔽过滤和探测器晶体探测三个物理模型过程。本文可以分析~(240)Pu/~(239)Pu比和~(241)Am/~(239)Pu比。实验结果表明:本方法分析~(240)Pu/~(239)Pu结果的相对误差小于1%。
引文
[1]Doug Reilly,Norbert Ensslin,and Hastings Smith,Jr.,Passive Nondestructive Assay of Nuclear Materials,US Nuclear Regulatory Commission NUREG/CR-5550,March 1991,Chapters 11-17.
[2]T.E.Sampson,Chapter 8,“Plutonium Isotopic Composition by Gamma-Ray Spectroscopy,”in Passive Nondestructive Assay of Nuclear Materials,edited by Doug Reilly,Norbert Ensslin,and Hastings Smith,Jr.,US Nuclear Regulatory Commission NUREG/CR-5550,March 1991.
[3]Thomas A.Kelley,Thomas E.Sampson,“Software User Manual,PC/FRAM,Version4,”Los Alamos National Laboratory Unlimited Release LA-UR-02-5268.
[4]R.Gunnink,“MGA:A Gamma-Ray Spectrum Analysis Code for Determining Plutonium Isotopic Abundances,Volume I,Methods and Algorithms,”Lawrence Livermore National Laboratory report UCRL-LR-103220,Vol.I/ISPO No.317,Task No.A.161,(April 1990).