Many-body theory of gamma spectra from positron-atom annihilation

被引：38

作者：

Dunlop, L. J. M. ^{[1
]}

Gribakin, G. F. ^{[1
]}

机构：

[1] Queens Univ Belfast, Dept Appl Math & Theoret Phys, Belfast BT7 1NN, Antrim, North Ireland

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2006年 / 39卷 / 07期

关键词：

D O I：

10.1088/0953-4075/39/7/008

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A many-body theory approach to the calculation of gamma spectra of positron annihilation on many-electron atoms is developed. We evaluate the first-order correlation correction to the annihilation vertex and perform numerical calculations for the noble gas atoms. Extrapolation with respect to the maximal orbital momentum of the intermediate electron and positron states is used to achieve convergence. The inclusion of correlation corrections improves agreement with experimental gamma spectra.

引用

页码：1647 / 1668

页数：22

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