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
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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
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发表时间:
2015
影响因子:
3.3
通讯作者:
Misha Yu Ivanov
中科院分区:
文献类型:
--
作者:
Lukas Medišauskas;Felipe Morales;Alicia Palacios;Alberto González-Castrillo;Lev Plimak;Olga Smirnova;Fernando Martín;Misha Yu Ivanov
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.
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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
影响因子:
2.9
作者:
A. Palacios;H. Bachau;F. Martín
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A. Palacios;H. Bachau;F. Martín
DOI:
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发表时间:
1975
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作者:
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通讯作者:
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1968
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作者:
J. Bardsley
通讯作者:
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DOI:
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发表时间:
1997
期刊:
影响因子:
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作者:
I. Sánchez;F. Martín
通讯作者:
F. Martín