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题名: Design Near-threshold Photoelectron Imaging Spectrometer Based on UV Laser Induced Photoelectron Emission Anion Source
作者: Qin, Zheng-bo1;  Wu, Xia1;  Tang, Zi-chao1
关键词: Threshold photoelectron imaging ;  Dissociative photoelectron attachment ;  Laser induced photoelectron emission
刊名: CHINESE JOURNAL OF CHEMICAL PHYSICS
发表日期: 2013-12-01
DOI: 10.1063/1674-0068/26/06/774-779
卷: 26, 期:6, 页:774-779
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Physics
英文摘要: We have developed a compact photoelectron imaging facility, including an anion source with dissociative photoelectron attachment to molecules, a linear time-of-flight mass spectrometry (TOFMS), and an orthogonal high-resolution threshold photoelectron velocity map imaging spectrometer (VMI). Intense and cold cluster anions were prepared in photoelectron-attachment processes upon pulsed UV laser ablation of metal target. Combining this anion source with TOFMS-VMI, the achieved mass resolution is about 200, and the electron kinetic energy resolution is better than 3%, i.e., 30 meV for 1 eV electrons. More importantly, low-energy photoelectron imaging spectra for CH3S- and S-2(-) at 611.46 nm are obtained. In both cases, the refined electron affinities are determined to be 1.8626 +/- 0.0020 eV for CH3S and 1.6744 +/- 0.0035 eV for S-2, respectively. Preliminary results suggest that the apparatus is a powerful tool for estimating precise electron affinities values from threshold photoelectron imaging spectroscopy.
关键词[WOS]: HIGH-RESOLUTION PHOTODETACHMENT ;  BOTTLE ELECTRON SPECTROMETER ;  MASS-SPECTROMETRY ;  CLUSTER ANIONS ;  NEGATIVE-IONS ;  ORGANIC-COMPOUNDS ;  SOFT-IONIZATION ;  SPECTROSCOPY ;  AFFINITIES ;  CH3S
语种: 英语
WOS记录号: WOS:000330591600022
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137927
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

Recommended Citation:
Qin, Zheng-bo,Wu, Xia,Tang, Zi-chao. Design Near-threshold Photoelectron Imaging Spectrometer Based on UV Laser Induced Photoelectron Emission Anion Source[J]. CHINESE JOURNAL OF CHEMICAL PHYSICS,2013,26(6):774-779.
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