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(VUV+UV)-REMPI Detection of the Methyl Radical Product in a Crossed-beam Scattering Experiment
Teh Waileong,Shiu Weicheng,Zhou Jingang,Liu Kopin
Author NameAffiliationE-mail
Teh Waileong 太空科学研究所,中央大学,中坜,台北106)  
Shiu Weicheng Institute of Atomic and Molecular SciencesAcademia Sinica P . O . Box 23-166Taipei 106  
Zhou Jingang Institute of Atomic and Molecular SciencesAcademia Sinica P . O . Box 23-166Taipei 106  
Liu Kopin Institute of Atomic and Molecular SciencesAcademia Sinica P . O . Box 23-166Taipei 106 kpliu@gate.sinica.edu.tw  
Abstract:
A (VUV+UV)-REMPI spectroscopy scheme was exploited to detect the methyl radical (CH3). To demonstrate its high sensitivity, a crossed-beam scattering experiment was conducted with CH3(CD3) as the reaction product from F+CH4(CD4). The absolute detection limit was estimated to be about 107/cm3. From the observed spectra, the spectroscopic constants of the two intermediate Rydberg states, 3d 2E″ and 3d 2A1′, were also refined.
Key words:  Four-wave mixing, Resonance-enhanced multiphoton ionization (REMPI), Rydberg state, Methyl
FundProject:
以(真空紫外光+紫外光)-共振加强式多光子游离法侦测交叉分子束之甲基生成物
郑伟良,徐维成,周金刚,刘国平*
摘要:
用(真空紫外光+紫外光)-共振加强式多光子游离法侦测甲基自由基.为证明此法之灵敏度,实验用交叉分子束反应F+CH4(CD4)→HF(DF)+CH3(CD3),其绝对灵敏度可达107/cm3.由所得之光谱,更精确地得到两个里德堡态3d2E″及3d 2A1′之光谱系数.
关键词:  
DOI:10.1088/1674-0068/15/3/218-223
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