Signatures of attosecond electronic–nuclear dynamics in the one-photon ionization of molecular hydrogen: analytical model versus ab initio calculations

Signatures of attosecond electronic–nuclear dynamics in the one-photon ionization of molecular hydrogen: analytical model versus ab initio calculations
复制标题

分子氢单光子电离中的阿秒电子核动力学特征:分析模型与从头计算

DOI:
10.1088/1367-2630/17/5/053011
复制
发表时间:
2015
影响因子:
3.3
通讯作者:
Misha Yu Ivanov
Misha Yu Ivanov
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Lukas Medišauskas;Felipe Morales;Alicia Palacios;Alberto González-Castrillo;Lev Plimak;Olga Smirnova;Fernando Martín;Misha Yu Ivanov

文献摘要

参考文献

被引文献

相似文献

我们提出了一个基于含时WKB近似的解析模型,再现了H2分子在自电离区的光电离谱。我们探讨了非解离通道,这是单光子吸收后的主要贡献,我们专注于在能量微分谱中产生的功能,由于直接和自电离途径之间的干扰。这些特征取决于自电离态的电子衰变的时间尺度和在这种状态下产生的振动波包的时间演化。完整的从头计算和一维的方法,只考虑到核波包与几个相关的电子状态,我们比较基态,自电离态,和背景连续电子状态。最后,我们说明了这些功能如何从分子状转变为原子状,通过增加系统的质量,从而使电子衰变时间短于与共振态相关的核波包运动。换句话说,自电离比分子离解成中性粒子更快。
We present an analytical model based on the time-dependent WKB approximation to reproduce the photoionization spectra of an H 2 molecule in the autoionization region. We explore the nondissociative channel, which is the major contribution after one-photon absorption, and we focus on the features arising in the energy differential spectra due to the interference between the direct and the autoionization pathways. These features depend on both the timescale of the electronic decay of the autoionizing state and the time evolution of the vibrational wavepacket created in this state. With full ab initio calculations and with a one-dimensional approach that only takes into account the nuclear wavepacket associated to the few relevant electronic states we compare the ground state, the autoionizing state, and the background continuum electronic states. Finally, we illustrate how these features transform from molecular-like to atomic-like by increasing the mass of the system, thus making the electronic decay time shorter than the nuclear wavepacket motion associated with the resonant state. In other words, autoionization then occurs faster than the molecular dissociation into neutrals.
N2 和 CO 价态光电离在宽能量范围内的 Franck-Condon 击穿机制
DOI: --
发表时间: 2012
期刊:
影响因子: --
作者:
J. A. López;D. Hardy;A. Das;E. Poliakoff;A. Aguilar;R. Lucchese
通讯作者: R. Lucchese
DOI: 10.1103/physreva.75.013408
发表时间: 2007-01
期刊: Physical Review A
影响因子: 2.9
作者:
A. Palacios;H. Bachau;F. Martín
通讯作者: A. Palacios;H. Bachau;F. Martín
电子分子散射理论:对绝热原子核近似的评论
DOI: --
发表时间: 1975
期刊:
影响因子: --
作者:
M. Shugard;A. Hazi
通讯作者: A. Hazi
DOI: --
发表时间: 1968
期刊:
影响因子: --
作者:
J. Bardsley
通讯作者: J. Bardsley
H2 和 D2 光电离的共振效应
DOI: --
发表时间: 1997
期刊:
影响因子: --
作者:
I. Sánchez;F. Martín
通讯作者: F. Martín