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中国科学院上海原子核研究所
收稿日期:1979-12-26,
纸质出版日期:1981-12
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梁渝生, 王功庆, 张怡萍. 用Ge (Li) γ能谱法定量分析核爆炸裂片在远区沉降物[J]. 核技术, 1981,04(6):11-16.
Yusheng Liang, Gongqing Wang, Yiping Zhang. Quantitative analysis of distant region atmospheric deposit of debris from nuclear explosion using Ge(Li)
本文介绍了对我国1978年3月核试验后近期内上海地区大气沉降物样品测定的方法和结果。这种环境样品的放射性极弱,约为10
-11
~10
-9
Ci,其中含有约20种发射γ射线的短寿命核素。在γ谱定量中,使用了对单峰面积的Wasson算法和对重叠峰面积的非线性最小二乘拟配分解的不用矩阵求逆算法,这种方法对于极弱样品的γ谱定量是成功的。
We describe a method and show the measurement results of the radioactive fallout samples collected in Shanghai area soon after the March 1978 nuclear test of China. These environmental samples which contain about 20 short-lived γ-emitting isotopes
have very weak radioactivity (10
-11
~10
-9
curies) . Two algorithms are used to determine the peak areas: the Wasson Algorithm (WA) for single peaks
and the nonlinear least-squares fitting algorithm without matrix inversion (AWMI) for unresolved peaks. It has been proved successful to apply this combined method to low-level
γ
ray spectrum assay.
L. Kokta , Nucl. Instr. Meth. , 112 , 245 ( 1973 ).
S. L. Meyer , Data analysis for scientists and Engineers , 1975 , p. 399 .
I. A. Slavic , Nucl. Instr. Meth. , 134 , 285 ( 1976 ).
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