Theoretical approach to the study of vibrational effects on strong field ionization of molecules with alignment-dependent tunneling ionization rates

The tunneling ionization rates of vibrationally excited N2 molecules at the ground electronic state are calculated using molecular orbital Ammosov–Delone–Krainov theory considering R-dependence. The results show that molecular alignment significantly affects the ionization rate, as the rate is mainl...

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Published inChinese physics B Vol. 24; no. 9; pp. 187 - 191
Main Author 张美霞 闫冰 杨玉军 罗嗣佐 朱瑞晗 杨雪 丁大军
Format Journal Article
LanguageEnglish
Published 01.09.2015
Subjects
Alignment
Electron density
Excitation
Field ionization
Ionization
Mathematical analysis
Molecular orbitals
N2分子
Tunneling
分子取向
分子轨道
振动效应
振动激发态
电子密度分布
电离率
隧穿
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Abstract The tunneling ionization rates of vibrationally excited N2 molecules at the ground electronic state are calculated using molecular orbital Ammosov–Delone–Krainov theory considering R-dependence. The results show that molecular alignment significantly affects the ionization rate, as the rate is mainly determined by the electron density distribution of the highest occupied molecular orbital. The present work indicates that the ratios of alignment-dependent rates of different vibrational levels to that of the vibrational ground level increase for the aligned N2 at the angle θ = 0？, and suggests that the alignment-dependent tunneling ionization rates can be used as a diagnostics for the influence of vibrational excitation on the strong field ionization of molecules.
AbstractList The tunneling ionization rates of vibrationally excited N sub(2) molecules at the ground electronic state are calculated using molecular orbital Ammosov-Delone-Krainov theory considering R-dependence. The results show that molecular alignment significantly affects the ionization rate, as the rate is mainly determined by the electron density distribution of the highest occupied molecular orbital. The present work indicates that the ratios of alignment-dependent rates of different vibrational levels to that of the vibrational ground level increase for the aligned N sub(2) at the angle [straighttheta] 0, and suggests that the alignment-dependent tunneling ionization rates can be used as a diagnostics for the influence of vibrational excitation on the strong field ionization of molecules.
The tunneling ionization rates of vibrationally excited N2 molecules at the ground electronic state are calculated using molecular orbital Ammosov–Delone–Krainov theory considering R-dependence. The results show that molecular alignment significantly affects the ionization rate, as the rate is mainly determined by the electron density distribution of the highest occupied molecular orbital. The present work indicates that the ratios of alignment-dependent rates of different vibrational levels to that of the vibrational ground level increase for the aligned N2 at the angle θ = 0？, and suggests that the alignment-dependent tunneling ionization rates can be used as a diagnostics for the influence of vibrational excitation on the strong field ionization of molecules.
Author 张美霞 闫冰 杨玉军 罗嗣佐 朱瑞晗 杨雪 丁大军
AuthorAffiliation Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, China College of Physics, Liaoning University, Shenyang 110036, China School of Science, Changchun University of Science and Technology, Changchun 130012, China College of Science, Jilin Institute of Chemical Technology, Jilin 130012, China
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Notes The tunneling ionization rates of vibrationally excited N2 molecules at the ground electronic state are calculated using molecular orbital Ammosov–Delone–Krainov theory considering R-dependence. The results show that molecular alignment significantly affects the ionization rate, as the rate is mainly determined by the electron density distribution of the highest occupied molecular orbital. The present work indicates that the ratios of alignment-dependent rates of different vibrational levels to that of the vibrational ground level increase for the aligned N2 at the angle θ = 0？, and suggests that the alignment-dependent tunneling ionization rates can be used as a diagnostics for the influence of vibrational excitation on the strong field ionization of molecules.
vibration,alignment-dependent ionization rate,tunneling ionization theory
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Snippet The tunneling ionization rates of vibrationally excited N2 molecules at the ground electronic state are calculated using molecular orbital...
The tunneling ionization rates of vibrationally excited N sub(2) molecules at the ground electronic state are calculated using molecular orbital...
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SubjectTerms Alignment
Electron density
Excitation
Field ionization
Ionization
Mathematical analysis
Molecular orbitals
N2分子
Tunneling
分子取向
分子轨道
振动效应
振动激发态
电子密度分布
电离率
隧穿
Title Theoretical approach to the study of vibrational effects on strong field ionization of molecules with alignment-dependent tunneling ionization rates
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