Transition Moment of the A2Δ-X2Π System of SiH Studied by Laser Induced Fluorescence Spectroscopy in Supersonic Free Expansions

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  • FUKUSHIMA Masaru
    <I>Advanced Technology Research Center, Mitsubishi Heavy Industries, LTD.</I>
  • ISHIWATA Takashi
    <I>Department of Information Sciences, Hiroshima City University</I>
  • OBI Kinichi
    <I>Department of Chemistry, Tokyo Institute of Technology</I>

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タイトル別名
  • Transition Moment of the A2.DELTA.-X2.PI. System of SiH Studied by Laser Induced Fluorescence Spectroscopy in Supersonic Free Expansions.
  • Transition Moment of the A2 デルターX2 パイ S

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Laser induced fluorescence (LIF) excitation spectra of the A2Δ-X2II transition of SiHhave been measured insupersonic free expansions. We observed the eight vibronic bands, 0-0, 1-0, 0-1, 1-1, 2-1, 1-2, 2-2, and 2-3, thethree Δv=-1 bands of which were observed for the first time. The Δv=0 sequencedominates the spectra, because of favorable Franck-Condon (F-C) factors. On the other hand, the intensities ofthe Δv=- 1transitions are much weaker than those of the Δv=+1 transitions in spite of theconsiderable intensity of Δv=-1expected from the calculated F-C factors. This behavior is interpreted in terms of the transition momenthaving the strong dependence on internuclear distance.

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  • レーザー研究

    レーザー研究 26 (6), 468-472, 1998

    一般社団法人 レーザー学会

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