Nondipole effects in double K-shell ionization of heliumlike ions

被引：7

作者：

Mikhailov, AI

Mikhailov, IA

Moskalev, AN

Nefiodov, AV ^{[1
]}

Plunien, G

Soff, G

机构：

[1] Petersburg Nucl Phys Inst, Gatchina 188300, St Petersburg, Russia

[2] Tech Univ Dresden, Inst Theoret Phys, D-01062 Dresden, Germany

来源：

PHYSICS LETTERS A | 2003年 / 316卷 / 06期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1016/j.physleta.2003.08.008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate angular and energy distributions for double K-shell ionization of heliumlike ions caused by the absorption of a single photon. The differential cross sections of the process are calculated in the near-threshold domain incorporating contributions beyond the dipole approximation. The interference between the electric-dipole and electric-quadrupole transition amplitudes is shown to lead to a forward/backward asymmetry in the angular distributions for the ejected electrons with respect to the incident photon beam. The energy distribution in the threshold area can be fairly well described within the framework of the dipole approximation for moderate values of the nuclear charge number Z. (C) 2003 Elsevier B.V All rights reserved.

引用

页码：395 / 399

页数：5

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