One- and two-electron numerical models of multiphoton ionization of helium

被引：30

作者：

Parker, JS ^{[1
]}

Moore, LR ^{[1
]}

Smyth, ES ^{[1
]}

Taylor, KT ^{[1
]}

机构：

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

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2000年 / 33卷 / 05期

关键词：

D O I：

10.1088/0953-4075/33/5/319

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We discuss the calculation of ionization rates of helium using time-dependent solutions of the full-dimensional Schrodinger equation in conjunction with time-dependent solutions of a single active electron (SAE) model of helium. The SAE model is a one-electron atom with a non-Coulombic effective potential that can be tuned in certain limits to give near quantitative agreement with the results of the full-dimensional integration. We show how the tuned SAE model can be used to improve the accuracy and reliability of the calculations of ionization cross sections. In addition we consider a case in which failure of the SAE model can be attributed to strong correlation effects in laser-driven helium, specifically interaction with an intermediate doubly excited (autoionizing) state of helium.

引用

页码：1057 / 1067

页数：11

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