Investigation of Angular Dependence of Strong-Field Tunneling Ionization for Asymmetric Diatomic Molecule Hell2

We determine the structure parameters for the asymmetric heteronuclear diatomic molecule HeH2＋ at several internuclear distances with the molecular wavefunctions obtained by solving the time-independent Schr6dinger equation with B-spline basis. Then the angular dependence of strong-field ionization...

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Bibliographic Details
Published in理论物理通讯：英文版 Vol. 58; no. 9; pp. 419 - 424
Main Author 李晓娇 赵松峰 刷效信
Format Journal Article
LanguageEnglish
Published 2012
Subjects
B样条基
不对称
异核双原子分子
强场
时间依赖性
时间无关
电离率
隧道电离
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ISSN0253-6102

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Summary:We determine the structure parameters for the asymmetric heteronuclear diatomic molecule HeH2＋ at several internuclear distances with the molecular wavefunctions obtained by solving the time-independent Schr6dinger equation with B-spline basis. Then the angular dependence of strong-field ionization rates of HeH2＋ are investigated with the molecular tunneling ionization theory. We show that the shape of several lowly excited states （i.e. 2pσ, 2pπ, 3dσ） for HeH2＋ are reflected in the orientation dependent ionization rates very well, however, the angle-dependent ionization rate fails to follow the angular distribution of the asymptotic electron density for the ground state lsσ. We also show that the internuclear distance dependent ionization probabilities are in a good agreement with the more accurate result obtained from the numerical solution of the time-dependent Schr6dinger equation.
Bibliography:LI Xiao-Jiao , ZHAO Song-Feng and ZHOU Xiao-Xin College of Physics and Electronic Engineering, Northwest Normal University, Key Laboratory of Atomic and Molecular Physics and Functional Materials of Cansu Province, Lanzhou 730070, China
11-2592/O3
We determine the structure parameters for the asymmetric heteronuclear diatomic molecule HeH2＋ at several internuclear distances with the molecular wavefunctions obtained by solving the time-independent Schr6dinger equation with B-spline basis. Then the angular dependence of strong-field ionization rates of HeH2＋ are investigated with the molecular tunneling ionization theory. We show that the shape of several lowly excited states （i.e. 2pσ, 2pπ, 3dσ） for HeH2＋ are reflected in the orientation dependent ionization rates very well, however, the angle-dependent ionization rate fails to follow the angular distribution of the asymptotic electron density for the ground state lsσ. We also show that the internuclear distance dependent ionization probabilities are in a good agreement with the more accurate result obtained from the numerical solution of the time-dependent Schr6dinger equation.
molecular tunneling ionization theory, molecular structure parameters, angular dependence oftunneling ionization rate
ISSN:0253-6102