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论文类型：期刊论文

发表时间：2019-04-15

发表刊物：SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

收录刊物：SCIE、PubMed、EI

卷号：213

页面范围：48-56

ISSN号：1386-1425

关键字：Pre-orientation; Pump-probe photoionization; Ionization probability; Angle-resolved photoelectron spectrum; PAD

摘要：We study theoretically the photoionization dynamics of pre-oriented NaK molecule. Firstly, a THz laser pulse is utilized to orient the ground state molecule. And then the pump and probe laser pulses are used to excite and ionize the molecule, respectively. We study the influence of molecular orientation duration and degree on the ionization probability, angle-resolved photoelectron spectrum and photoelectron angular distribution (PAD). It is shown that we could obtain more stable ionization signal and PAD when the molecules are ionized in molecular orientation duration. We could increase the ionization probability and obtain more concentrated ionization signal and photoelectron distribution by increasing the orientation degree in the ground state. Moreover, we discuss the splitting pattern in the angle-resolved photoelectron spectrum. (C) 2019 Elsevier B.V. All rights reserved.