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Neutral Dissociation of Superexcited Nitric Oxide Induced by Intense Laser Fields
Kai Liu,Di Song,Ali Azarm,See-Leang Chin,Fan-ao Kong*
Author NameAffiliationE-mail
Kai Liu Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China  
Di Song Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China  
Ali Azarm Departmentof Physics, Engineering Physics and Optics & Center for Optics, Photonics and Laser (COPL), Universit′e Laval, Qu′ebec City, Qu′ebec, G1 V 0A6, Canada  
See-Leang Chin Departmentof Physics, Engineering Physics and Optics & Center for Optics, Photonics and Laser (COPL), Universit′e Laval, Qu′ebec City, Qu′ebec, G1 V 0A6, Canada  
Fan-ao Kong* Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China kong@iccas.ac.cn 
Abstract:
Superexcited states of NO molecule and their neutral dissociation processes have been stud-ied both experimentally and theoretically. Neutral excited N? and O? atoms are detected by fluorescence spectroscopy for the NO molecule upon interaction with 800 nm intense laser radiation of duration 60 fs and intensity 0.2 PW/cm2. Intense laser pulse causes neu-tral dissociation of superexcited NO molecule by way of multiphoton excitation, which is equivalent to single photon excitation in the extreme-ultraviolet region by synchrotron ra-diation. Potential energy curves (PECs) are also built using the calculated superexcited state of NO+. In light of the PECs, direct dissociation and pre-dissociation mechanisms are proposed respectively for the neutral dissociation leading to excited fragments N? and O?.
Key words:  Superexcited state, Neutral dissociation, Intense laser
FundProject:
Neutral Dissociation of Superexcited Nitric Oxide Induced by Intense Laser Fields
刘凯,宋迪,Ali Azarm,See-Leang Chin,孔繁敖*
摘要:
利用波长800 nm、脉宽60 fs、强度0.2 PW/cm2的强激光激发NO分子,随后通过荧光光谱检测到了处于激发态的N和O的中性碎片. 说明强激光导致的多光子激发同样可以引起NO分子的超激发,并且发生中性解离. 采用离子实解离模型,建立了NO分子的超激发态势能曲线. 提出了直接解离和预解离两种解离过程,分别对应生成N*+O或O*+N两个通道.
关键词:  超激发态,中性解离,强激光
DOI:10.1088/1674-0068/23/03/252-254
分类号: