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论文类型：期刊论文

发表时间：2009-01-28

发表刊物：JOURNAL OF CHEMICAL PHYSICS

收录刊物：SCIE、EI、PubMed

卷号：130

期号：4

页面范围：044308

ISSN号：0021-9606

关键字：molecule-photon collisions; photodissociation; photoionisation; probability; sodium compounds; Stark effect

摘要：The diabatic photodissociation and photoionization processes of the NaI molecule are studied theoretically using the quantum wave packet method. A pump laser pulse is used to prepare a dissociation wave packet that propagates through both the ionic channel (NaI -> Na(+)+I(-)) and the covalent channel (NaI -> Na+I). A Stark pulse is used to control the diabatic dissociation dynamics and a probe pulse is employed to ionize the products from the two channels. Based on the first order nonresonant nonperturbative dynamic Stark effect, the dissociation probabilities and the branching ratio of the products from the two channels can be controlled. Moreover the final photoelectron kinetic energy distribution can also be affected by the Stark pulse. The influences of the delay time, intensity, frequency, and carrier-envelope phase of the Stark pulse on the dissociation and ionization dynamics of the NaI molecule are discussed in detail.