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论文类型：期刊论文

发表时间：2012-08-01

发表刊物：JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY

收录刊物：SCIE、Scopus

卷号：11

期号：4

页面范围：709-721

ISSN号：0219-6336

关键字：Above-threshold dissociation; laser pulse train; dissociation branching ratio

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.