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论文类型：期刊论文

发表时间：2008-04-07

发表刊物：JOURNAL OF CHEMICAL PHYSICS

收录刊物：SCIE、EI、PubMed

卷号：128

期号：13

页面范围：134303

ISSN号：0021-9606

摘要：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.