DOUBLE PHOTOIONIZATION OF ATOMIC HELIUM AND ITS ISOELECTRONIC PARTNERS AT X-RAY-ENERGIES

被引：133

作者：

DALGARNO, A

SADEGHPOUR, HR

机构：

[1] Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138

来源：

PHYSICAL REVIEW A | 1992年 / 46卷 / 07期

关键词：

D O I：

10.1103/PhysRevA.46.R3591

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A simple and accurate procedure for calculating the rate of double photoionization of "two-electron" systems at very high photon energies is presented. Arguments are given to support the validity of the method used. In particular, we show that the many-body perturbation theory diagrams depend asymptotically on the choice of the gauge for the electric dipole operator. The ratio of double-to-single ionization is calculated to be 1.68% in agreement with the recent synchrotron measurements. For H- and Li+, we predict ratios of 1.51% and 0.89%, respectively.

引用

页码：R3591 / R3993

页数：403

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