Photo-ionization of the helium atom close to the double-ionization threshold: Towards the Ericson regime

被引：38

作者：

Gremaud, B

Delande, D

机构：

[1] Laboratoire Kastler-Brossel, Univ. Pierre et Marie Curie, 75005 Paris

来源：

EUROPHYSICS LETTERS | 1997年 / 40卷 / 04期

关键词：

D O I：

10.1209/epl/i1997-00472-2

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We calculate the photo-ionization cross-section from the ground state of the helium atom, using the complex rotation method and diagonalization of sparse matrices. This produces directly the positions and widths of the doubly excited P-1 degrees resonances together with the photo-ionization cross-section. Our calculations up to the N = 9 threshold are in perfect agreement with recent experimental data and show the transition from a regular structure at low energy to a chaotic one at high energy, where various resonances strongly overlap.

引用

页码：363 / 368

页数：6

共 18 条

[1]

[Anonymous], ANGULAR MOMENTUM

[2] Existence of an Ericson regime in stretched helium [J].