Double ionization of He in an intense laser field via a rescattering process

被引：6

作者：

Ishikawa, T. ^{[1
]}

Tong, X. M. ^{[1
,2
]}

Toshima, N. ^{[1
]}

机构：

[1] Univ Tsukuba, Inst Mat Sci, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058573, Japan

[2] Univ Tsukuba, Ctr Computat Sci, Tsukuba, Ibaraki 3058577, Japan

来源：

PHYSICAL REVIEW A | 2010年 / 82卷 / 03期

基金：

日本学术振兴会;

关键词：

NONSEQUENTIAL DOUBLE-IONIZATION; DENSITY-FUNCTIONAL THEORY; HELIUM; DYNAMICS; RATES; ATOMS;

D O I：

10.1103/PhysRevA.82.033411

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the ratio of double to single ionization of He in an intense laser field based on the rescattering model. Folding the rescattering energy spectra with the electron impact inelastic cross sections, we obtain the probability of double ionization due to the nonsequential ionization process. Our results are in reasonable agreement with the experiment [Walker et al., Phys. Rev. Lett. 73, 1227 (1994)]. Furthermore, we investigate the physical insights of the nonsequential double ionization by analyzing the rescattering energy spectra at different intensities and the contributions from individual returns. This study confirms the reliability of the rescattering energy spectra obtained from ab initio calculations. The rescattering information can be used to analyze many other dynamical processes in intense laser-matter interactions, such as molecular imaging.

引用

页数：5

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