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题名: Field modulation of Rydberg-state populations of NO studied by femtosecond time-resolved photoelectron imaging
作者: Wang, Bingxing1, 2;  Liu, Benkang1, 2;  Wang, Yanqiu2;  Wang, Li2
刊名: PHYSICAL REVIEW A
发表日期: 2010-04-01
DOI: 10.1103/PhysRevA.81.043421
卷: 81, 期:4
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Optics ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Optics ;  Physics
英文摘要: Femtosecond time-resolved velocity map imaging combined with multiphoton ionization was applied to study the optical field modulation of NO Rydberg-state populations. The A(2)Sigma +(upsilon = 2) state is populated by absorption of one 271-nm photon. Two peaks in the photoelectron kinetic energy spectra, centered at 0.82 and 2.35 eV, are caused by ionization from the A(2)Sigma(+) (upsilon = 2) state by time-delayed one-color and two-color multiphoton ionization, respectively. In the overlap region of the pump and probe light, the C(2)Pi (upsilon = 4) state is populated by a 1 + 1' excitation. When the pump laser intensity is increased, other Rydberg states (E(2)Sigma(+), F(2)Delta, and D(2)Sigma(+)) are moved into resonance by a laser-induced Stark shift. These states can be populated only within the temporal overlap region of the pump and probe light. When the intensity of the pump laser is higher than 2.9 x 10(12) W/cm(2), Rydberg-valence coupling between the A(2)Sigma(+)(upsilon = 2) and B(2)Pi (upsilon = 4) states may play a key role, resulting in photoelectrons with kinetic energy of 0.37 eV. The coupling strength increases with increasing pump laser intensity.
关键词[WOS]: SMALL MOLECULES ;  LASER-PULSES ;  SPECTROSCOPY ;  IONIZATION ;  CHEMISTRY ;  SERIES
语种: 英语
WOS记录号: WOS:000277227300137
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141868
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, Grad Sch, Beijing 100049, Peoples R China
2.Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China

Recommended Citation:
Wang, Bingxing,Liu, Benkang,Wang, Yanqiu,et al. Field modulation of Rydberg-state populations of NO studied by femtosecond time-resolved photoelectron imaging[J]. PHYSICAL REVIEW A,2010,81(4).
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