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论文类型：期刊论文

发表时间：2014-01-28

发表刊物：JOURNAL OF CHEMICAL PHYSICS

收录刊物：SCIE、EI、PubMed、Scopus

卷号：140

期号：4

页面范围：044316

ISSN号：0021-9606

摘要：The orientation and predissociation dynamics of the NaI molecule are studied by using a time-dependent wavepacket method. The NaI molecule is first pre-oriented by a single-cycle pulse (SCP) in terahertz (THz) region and then predissociated by a femtosecond pump pulse. The influence of the molecular field-free orientation on the predissociation dynamics is studied in detail. We calculate the radial and angular distributions, the molecular orientation degrees, and the time-dependent populations for both the ground and excited electronic states. It is found that the pre-orientation affects the angular distributions significantly, and that it has weak influence on the radial distributions. By varying the delay time between the THz SCP and the pump pulse, the angular distribution of the fragments from the predissociation can be manipulated. (C) 2014 AIP Publishing LLC.