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Indexed by:期刊论文

Date of Publication:2013-01-14

Journal:JOURNAL OF CHEMICAL PHYSICS

Included Journals:SCIE、EI、PubMed、Scopus

Volume:138

Issue:2

Page Number:024304

ISSN No.:0021-9606

Abstract:The multi-photon dissociation of HCl+ through three channels HCl+ -> H(1s vertical bar S-2) + Cl+(P-3), H+ + Cl(P-2(0)), and H(S-2) + Cl+(D-1) steered by intense femtosecond laser pulses are investigated theoretically using the quantum wave packet dynamics. The numerical calculations are performed in two cases without and with the coupling between the excited states. The results show that the dissociation is sensitive to the duration tau, peak intensity I-0, and the resonance of driving laser fields. In the case without the coupling, the effect of the permanent dipole moments on the dissociations dominates for tau < 15 fs, while with the increase of tau, the dissociation dynamics is mainly dominated by the transition dipole moment. In the case with the coupling, the above-threshold dissociation process is complex, and the non-resonant (lambda = 400 nm) and resonant (lambda = 800 and 1200 nm) laser fields lead to different variation of the branching ratios. The angle-resolved energy distribution is also discussed in detail. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4773022]