Steering dissociation of Br(2) molecules with two femtosecond pulses via wave packet interference

作者：Han Yong Chang; Yuan Kai Jun; Hu Wen Hui; Yan Tian Min; Cong Shu Lin^*

来源：Journal of Chemical Physics, 2008, 128(13): 134303.

DOI：10.1063/1.2844792

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 ((2)P(3/2))+Br ((2)P(3/2)) and Br ((2)P(3/2))+Br* ((2)P(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.

• 出版日期2008-4-7
• 单位大连理工大学