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题名: Cluster-assisted multiple-ionization of methyl iodide by a nanosecond laser: Wavelength dependence of multiple-charge ions
作者: Wang, Weiguo1;  Li, Haiyang1;  Niu, Dongmei1;  Wen, Lihua1;  Zhang, Nazhen1
关键词: multiple-charge ions ;  nanosecond laser ;  methyl iodide cluster ;  inverse bremsstrahlung
刊名: CHEMICAL PHYSICS
发表日期: 2008-09-03
DOI: 10.1016/j.chemphys.2008.05.016
卷: 352, 期:1-3, 页:111-116
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: As efforts continue to elucidate laser-cluster interactions, we investigated the influence of laser wavelength on ion products. In this study, a pulsed methyl iodide cluster was irradiated with a Nd-YAG nanosecond laser, and the ion products were analyzed using time-of-flight mass spectrometry. Multiple-charge atomic ions of Cq+ and Iq+(q >= 2) were observed using 532 and 1064 nm laser wavelengths; however, only single-charge atomic and molecular ions appeared at 266 and 355 nm. We show that the charge-state distribution for multiple-charge ions is almost independent of laser intensity. A three-stage model was developed to further understand these experimental results: the inverse electron bremsstrahlung heating rate is proportional to the square of laser wavelength, which seems to explain the dependence of multiple-charge ions on the wavelength. (C) 2008 Elsevier B.V. All rights reserved.
关键词[WOS]: X-RAY-EMISSION ;  MULTIELECTRON DISSOCIATIVE IONIZATION ;  MULTIPHOTON INVERSE BREMSSTRAHLUNG ;  ATOMIC CLUSTERS ;  ENERGY ;  FIELD ;  GENERATION ;  DYNAMICS ;  PULSES ;  NM
语种: 英语
WOS记录号: WOS:000259463200014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140825
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, Dalian 116023, Peoples R China

Recommended Citation:
Wang, Weiguo,Li, Haiyang,Niu, Dongmei,et al. Cluster-assisted multiple-ionization of methyl iodide by a nanosecond laser: Wavelength dependence of multiple-charge ions[J]. CHEMICAL PHYSICS,2008,352(1-3):111-116.
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