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Indexed by:期刊论文

Date of Publication:2008-04-07

Journal:JOURNAL OF CHEMICAL PHYSICS

Included Journals:SCIE、EI、PubMed

Volume:128

Issue:13

Page Number:134303

ISSN No.:0021-9606

Abstract:The dissociation dynamics of Br-2 molecules induced by two femtosecond pump pulses are studied based on the calculation of time-dependent quantum wave packet. Perpendicular transition from X (1)Sigma(+)(g) to A (3)Pi(+)(1u) and (1)Pi(+)(1u) and parallel transition from X (1)Sigma(+)(g) to B (3)Pi(+)(0u), involving two product channels Br (P-2(3/2))+Br (P-2(3/2)) and Br (P-2(3/2))+Br* (P-2(1/2)), respectively, are taken into account. Two pump pulses create dissociating wave packets interfering with each other. By varying laser parameters, the interference of dissociating wave packets can be controlled, and the dissociation probabilities of Br-2 molecules on the three excited states can be changed to different degrees. The branching ratio of Br*/(Br+Br*) is calculated as a function of pulse delay time and phase difference. (C) 2008 American Institute of Physics.