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题名: Time-Resolved Multiphoton Ionization Process of Xenon Investigated by Photoelectron Imaging Method
作者: Liu Ben-Kang1, 2;  Wang Yan-Qiu1;  Wang Li1
关键词: Time-resolved ;  Homemade ;  Ion imaging detector ;  Xenon ;  Photoelectron imaging ;  Ponderomotive effect ;  Multiphoton ionization
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 2010-12-01
DOI: 10.3866/PKU.WHXB20101220
卷: 26, 期:12, 页:3157-3162
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Femtosecond time-resolved multiphoton ionization dynamics of xenon was investigated using a homemade ion imaging detector. A comparison experiment comprising of the multiphoton ionization of Xe at 408 nm showed that the energy resolution of our homemade image detector was similar to that of a commercial detector. Under 272 nm femtosecond laser irradiation, photoelectrons with a kinetic energy of 1.57 and 0.26 eV, produced by three-photon ionization, corresponded to two different Xe+ spin states, respectively. For the ionization at 408 nm, an additional first-order above-threshold ionization of Xe was also observed. In the two-color femtosecond time-resolved experiments, the photoelectron kinetic energy spectra varied with the delay time between the pump and the probe. The photoelectron intensities produced by 3+1' and 4'+1 two-color multiphoton ionization schedules became stronger with an increase in the degree of overlap between the two laser beams. The kinetic energy of the photoelectrons produced by one-color multiphoton ionization showed obvious red shifts, which were modulated by the second laser beam. Depopulation of the excited states was also observed upon application of the second laser beam. The red shifts in the photoelectron kinetic energy spectra reflect the time-dependent dynamical modulation process of the laser induced ponderomotive effect in an atomic system.
关键词[WOS]: ABOVE-THRESHOLD IONIZATION ;  STARK SHIFTS ;  LASER-PULSE ;  SPECTROSCOPY ;  PHOTODISSOCIATION ;  TRANSITIONS ;  SPECTRA ;  CHANNEL
语种: 英语
WOS记录号: WOS:000284912800004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141628
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, Liaoning Prov, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Liu Ben-Kang,Wang Yan-Qiu,Wang Li. Time-Resolved Multiphoton Ionization Process of Xenon Investigated by Photoelectron Imaging Method[J]. ACTA PHYSICO-CHIMICA SINICA,2010,26(12):3157-3162.
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