γ-Ray Spectra and Enhancement Factors for Positron Annihilation with Core Electrons

被引：33

作者：

Green, D. G. ^{[1
]}

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

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 09期

基金：

美国国家科学基金会;

关键词：

INDUCED AUGER; SPECTROSCOPY; SURFACES; SOLIDS; GAS;

D O I：

10.1103/PhysRevLett.114.093201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Many-body theory is developed to calculate the. spectra for positron annihilation in noble-gas atoms. Inclusion of electron-positron correlation effects and core annihilation gives spectra in excellent agreement with experiment [K. Iwata et al., Phys. Rev. Lett. 79, 39 (1997)]. The calculated correlation enhancement factors gamma(nl) for individual electron orbitals nl are found to scale with the ionization energy I-nl (in eV), as gamma(nl) = 1 + root A/I-nl + (B/I-nl)(beta), where A approximate to 40 eV, B approximate to 24 eV, and beta approximate to 2.3.

引用

页数：5

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