SELF-ABSORPTION CORRECTIONS FOR WELL-TYPE GERMANIUM DETECTORS
SELF-ABSORPTION CORRECTIONS FOR WELL-TYPE GERMANIUM DETECTORS
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DOI：
10.1016/0168-583x(92)95328-o
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发表时间：
1992-08-01
影响因子：
1.3
通讯作者：
NOLAN, PJ
中科院分区：
文献类型：
--
作者：
APPLEBY, PG;RICHARDSON, N;NOLAN, PJ
自吸收校正对于γ能谱法准确测定Pb-210、Am-241和Th-234等低能γ辐射核素至关重要。本文提出了一个确定阱型锗探测器所需校正的简单理论模型。在这个模型中，自吸收因子表示在样品的质量衰减系数和表征井的几何形状的参数。自吸收的实验测量被用来评估模型，并确定一个半经验算法的几何参数的改进估计。
Corrections for self-absorption are of vital importance to accurate determination by gamma spectrometry of radionuclides such as Pb-210, Am-241 and Th-234 which emit low energy gamma radiation. A simple theoretical model for determining the necessary corrections for well-type germanium detectors is presented. In this model, self-absorption factors are expressed in terms of the mass attenuation coefficient of the sample and a parameter characterising the well geometry. Experimental measurements of self-absorption are used to evaluate the model and to determine a semi-empirical algorithm for improved estimates of the geometrical parameter.