Atomic Density Distributions of Grain Boundaries in Metals and Lifetime Spectra Characteristics of Positron Annihilation

Chen Jiqiang; Long Qiwei; Zhou Jin; Wang Kelin

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2024年10月30日

Chinese Physics C> 1989, Vol. 13> Issue(S4) : 347-356

Atomic Density Distributions of Grain Boundaries in Metals and Lifetime Spectra Characteristics of Positron Annihilation

Chen Jiqiang ^1,3 ,
Long Qiwei ^2,3,1 ,
Zhou Jin ¹ ,
Wang Kelin ¹

1. Centre for Fundamental Physics, University of Science and Technology of China, Hefei;
2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang;
3. International Centre for Material Physics, Chinese Academy of Sciences, Shenyang

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Abstract：
On the basis of a simple grain boundary model, the trapped states of positrons at grain boundaries in pure Aluminum are solved and the corresponding lifetime spectra of positron annihilation calculated. The correlations between the atomic density distributions of grain boundaries and the lifetime spectra are discussed, and the existent experimental results are explained theoretically.

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[19]	XIONG Liang-Yue(L.Y.Xiong) . THE ACCURATE DETERMINATION OF SMALL VARIATIONS FOR THE PARAMETERS OF POSITRON LIFETIME SPECTRA IN AMORPHOUS ALLOY. Chinese Physics C, 1986, 10(5): 513-518.
[20]	WANG Shu-Ying . METHOD OF ANALYSING POSITRON ANNIHILATION LIFETIME SPECTRUM WITH A MULTI EXPONENTIAL CURVE FITTING. Chinese Physics C, 1983, 7(4): 408-414.

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Chen Jiqiang, Long Qiwei, Zhou Jin and Wang Kelin. Atomic Density Distributions of Grain Boundaries in Metals and Lifetime Spectra Characteristics of Positron Annihilation[J]. Chinese Physics C, 1989, 13(S4): 347-356.

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Received: 1989-02-13

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Atomic Density Distributions of Grain Boundaries in Metals and Lifetime Spectra Characteristics of Positron Annihilation

1. Centre for Fundamental Physics, University of Science and Technology of China, Hefei;
2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang;
3. International Centre for Material Physics, Chinese Academy of Sciences, Shenyang

Received Date: 1989-02-13

Abstract: On the basis of a simple grain boundary model, the trapped states of positrons at grain boundaries in pure Aluminum are solved and the corresponding lifetime spectra of positron annihilation calculated. The correlations between the atomic density distributions of grain boundaries and the lifetime spectra are discussed, and the existent experimental results are explained theoretically.