Molecular rotation in strong-field ionization

Autor:	Jan M. Rost, R. Schmidt, Frank Grossmann, Martin Fischer, J. Handt
Rok vydání:	2012
Předmět:	Physics Rotation period Fragmentation (mass spectrometry) Ionization Excited state Physics::Atomic and Molecular Clusters Degrees of freedom (physics and chemistry) Physics::Atomic Physics Photoionization Atomic physics Dihydrogen cation Rotation Atomic and Molecular Physics and Optics
Zdroj:	Physical Review A. 86
ISSN:	1094-1622 1050-2947
Popis:	A detailed vibrationally and rotationally resolved study for the fragmentation dynamics of the hydrogen molecular ion (${{\text{H}}_{2}}^{+}$) under intense short laser pulses is presented. Our theoretical nonadiabatic quantum molecular dynamics approach allows us to dynamically include all degrees of freedom for ionization also. We find that in general rotation enhances ionization compared to that in rotationally frozen molecules, with a weaker effect on highly vibrationally excited states. We identify the alignment time of one-quarter of the rotational period as the parameter which decides the dynamical relevance of rotation. Our analysis explains the dominance of dissociation over ionization observed experimentally and also clarifies why dimensionally reduced calculations predict a dominance of ionization.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::34cb47281c8c95ae1d7c471c77634d7b https://doi.org/10.1103/physreva.86.053821 Zobrazit plný text záznamu