CONTROLLING ABOVE-THRESHOLD DISSOCIATION BRANCHING RATIOS OF HD+ WITH FEMTOSECOND LASER PULSE TRAIN

被引：3
|
作者：
Su, Qian-Zhen [1 ]
Yu, Jie [1 ]
Yuan, Kai-Jun [1 ]
Cong, Shu-Lin [1 ]
机构：
[1] Dalian Univ Technol, Sch Phys & Optoelect Technol, Dalian 116024, Peoples R China
来源：
JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY | 2012年 / 11卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Above-threshold dissociation; laser pulse train; dissociation branching ratio; COHERENT EXCITATION; INTENSE; DYNAMICS; ATOMS; IONIZATION; MOLECULES; H-2(+);
D O I：
10.1142/S0219633612500472
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Above-threshold dissociation (ATD) process of the molecular ions HD+ steered by a femtosecond laser pulse train (LPT) is investigated theoretically using the time-dependent quantum wave packet method. Energy-dependent distributions of ATD fragments are analyzed by using an asymptotic-flow expression in the momentum space. It is found that fragment kinetic energy spectra shift to low energy region with increasing pulse number of LPT. The photofragment branching ratio between the 1s sigma(g) and 2p sigma(u) dissociation channels is sensitive to the pulse number of LPT. The momentum distribution of the ATD fragments is discussed in detail.
引用
收藏
页码：709 / 721
页数：13
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