One-photon double ionization of helium: A heuristic formula for the cross section

被引：3

作者：

Forre, Morten ^{[1
]}

机构：

[1] Univ Bergen, Dept Phys & Technol, N-5007 Bergen, Norway

来源：

PHYSICAL REVIEW A | 2012年 / 85卷 / 01期

关键词：

DOUBLE-PHOTOIONIZATION; TRIPLE PHOTOIONIZATION; ABOVE-THRESHOLD; R-MATRIX; SINGLE; HE; ENERGY;

D O I：

10.1103/PhysRevA.85.013420

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Without a formal derivation, we propose a formula for the total and single-differential cross sections in the problem of one-photon double ionization of an atom. The formula is benchmarked against accurate experimental data for the total cross section of helium. Furthermore, a direct comparison with ab initio calculations for the double ionization of Li+ suggests that the framework is valid for the entire helium isoelectronic sequence. To this end, we introduce a formula for the double ionization of lithium as well as for the triple ionization of lithium and beryllium.

引用

页数：4

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