Imperial College London
Alternate

ProfessorMishaIvanov

Faculty of Natural Sciences, Department of Physics

Chair-Theoretical Attosec Sci/Ultraf Quantum Coher
 
 
 
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Contact

 

+44 (0)20 7594 9719m.ivanov

 
 
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Location

 

Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Medisauskas:2015:5/053011,
author = {Medisauskas, L and Morales, F and Palacios, A and Gonzalez-Castrillo, A and Plimak, L and Smirnova, O and Martin, F and Ivanov, MY},
doi = {5/053011},
journal = {New Journal of Physics},
title = {Signatures of attosecond electronic-nuclear dynamics in the one-photon ionization of molecular hydrogen: analytical model versus ab initio calculations},
url = {http://dx.doi.org/10.1088/1367-2630/17/5/053011},
volume = {17},
year = {2015}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We present an analytical model based on the time-dependent WKB approximation to reproduce the photoionization spectra of an H2 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.
AU  - Medisauskas,L
AU  - Morales,F
AU  - Palacios,A
AU  - Gonzalez-Castrillo,A
AU  - Plimak,L
AU  - Smirnova,O
AU  - Martin,F
AU  - Ivanov,MY
DO  - 5/053011
PY  - 2015///
SN  - 1367-2630
TI  - Signatures of attosecond electronic-nuclear dynamics in the one-photon ionization of molecular hydrogen: analytical model versus ab initio calculations
T2  - New Journal of Physics
UR  - http://dx.doi.org/10.1088/1367-2630/17/5/053011
UR  - http://hdl.handle.net/10044/1/30090
VL  - 17
ER  -
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