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题名: Theoretical Investigation of the Competitive Mechanism Between Dissociation and Ionization of H-2(+) in Intense Field
作者: Yao, Hongbin1, 2;  Zhao, Guangjiu1
刊名: JOURNAL OF PHYSICAL CHEMISTRY A
发表日期: 2014-10-02
DOI: 10.1021/jp5030153
卷: 118, 期:39, 页:9173-9181
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Physics
英文摘要: The competitive mechanism between dissociation and ionization of hydrogen molecular ion in intense field has been theoretically investigated by using an accurate non-BornOppenheimer method. The relative yield of fragments indicates that the dissociation and ionization channels are competitive with the increasing laser intensity from 5.0 X 10(13) to 2.0 X 10(14) W/cm(2). In the case of intensity lower than 1.0X 10(14) W/cm(2), the dissociation channel is dominant, with a minor contribution from ionization. The mechanism of dissociation includes the contributions from the bond softening, bond hardening, below-threshold dissociation, and above-threshold dissociation, which are strongly dependent on the laser intensity and initial vibrational state. Furthermore, the ionization dominates over the dissociation channel at the highest intensity of 2.0 X 10(14) W/cm(2). The reasonable origin of ionization is ascribed as the above-threshold Coulomb explosion, which has been demonstrated by the space-time dependent ionization rate. Moreover, the competition mechanism between dissociation and ionization channels are displayed on the total kinetic energy resolved (KER) spectra, which could be tested at current experimental conditions.
关键词[WOS]: ABOVE-THRESHOLD-DISSOCIATION ;  LASER FIELDS ;  MULTIPHOTON IONIZATION ;  ELECTRON LOCALIZATION ;  DYNAMICS ;  PULSES ;  BOND
语种: 英语
WOS记录号: WOS:000342651200033
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145427
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.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Xinjiang Inst Engn, Dept Basic Courses, Urumqi 830091, Peoples R China

Recommended Citation:
Yao, Hongbin,Zhao, Guangjiu. Theoretical Investigation of the Competitive Mechanism Between Dissociation and Ionization of H-2(+) in Intense Field[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2014,118(39):9173-9181.
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