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中国科学院高能物理研究所
纸质出版日期:1982-12
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王淑英. 多指数曲线拟合分解正电子湮灭寿命谱的方法[J]. 核技术, 1982,05(6):81-83.
Shuying Wang. A method of analysing positron annihilation lifetime spectrum with a multi exponential curve fitting[J]. Nuclear techniques, 1982, 05(6): 81-83.
多指数曲线拟合是最小二乘拟合分析正电子湮灭寿命谱的方法之一。它与最小二乘褶积拟合法
[1]
不同,数学模型中不考虑谱仪分辨函数的影响。对分析寿命谱的一些实际问题,文献中很少有具体的介绍。
A method of solving some practical problems in analysing the lifetimes pectrum with a multi-exponential curve fitting were studied through the analysis of the lifetime spectra of e
+
annihilation in amorphous alloy samples and others. It includes the selection of the start point of the fitting data one by one from a certain time range on the right of the spectrum peak
the normalization of the sum of all the relative intensities of various components by ajusting the zero time position of the spectrum and the test of the tail component to diminish the effect on the analysis of the end point position.
P. Kirkegaard and M. Eldrup , Compt. phys. Commun. , 7 , 401 ( 1974 ).
S. Berko , Phys. Rev. , 154 , 249 ( 1967 ).
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