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题名: Pathway of H+ in fragmentation of H-2 in 810 nm intense femtosecond laser fields
作者: Guo, Wei1;  Lu, Xingqiang2;  Zhao, Dan3;  Wang, Xinlin1
关键词: bond softening ;  above-threshold dissociation ;  Coulomb explosion ;  light-dressed states
刊名: PHYSICA SCRIPTA
发表日期: 2014-02-01
DOI: 10.1088/0031-8949/89/02/025401
卷: 89, 期:2
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Physics, Multidisciplinary
研究领域[WOS]: Physics
英文摘要: We experimentally measured the kinetic energy and angular distributions of fragment ion H+ of H-2 as a function of 810 nm femtosecond laser intensity by using velocity map imaging technique. The reaction pathways of dissociation channels H-2(+) -> H+ + H and H-2(2+) -> H+ + H+ are proposed. The analysis of the angular distribution indicates the net two-photon pathway via the 3 omega crossing dominates over the direct one-photon pathway in channel H-2(+) -> H+ + H. The ionization of H-2(+) to H-2(2+) may be initiated by bond softening and above-threshold dissociation. The relative yield of fragment peaks indicates that dissociation and ionization of H-2(+) are competitive. The lower laser intensities emphasize the dissociation probability of H-2(+), and the higher laser intensities favor higher ionization stages.
关键词[WOS]: COULOMB EXPLOSION ;  INDUCED ALIGNMENT ;  MOLECULES ;  DYNAMICS ;  DISSOCIATION ;  IONIZATION ;  IONS
语种: 英语
WOS记录号: WOS:000331209200005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145581
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China
2.Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China

Recommended Citation:
Guo, Wei,Lu, Xingqiang,Zhao, Dan,et al. Pathway of H+ in fragmentation of H-2 in 810 nm intense femtosecond laser fields[J]. PHYSICA SCRIPTA,2014,89(2).
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