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ID 19243
本文ファイル
著者
Tokue, Ikuo
Nanbu, Shinkoh
抄録(英)
Emissions in the 200–750 nm region produced by the collision of He*(2 3S) with H2S were studied under single-collision conditions. The hydrogen Balmer lines and the SH+(A 3Π–X 3Σ-) and H2S+(A˜ 2A1–X˜ 2B1) bands were assigned. The total emission cross section (σem) was evaluated to be (1.7±0.3)×10-20 m2 at a collision energy of 150 meV. The σems of the SH+(A–X) and H2S+(A˜ –X˜ ) bands decreased with increase in the collision energy in the 115–200 meV range, indicating that attractive forces are effective for the incident channels with regard to the formation of these species. The rotational distribution of SH+(A 3Π,ν'=0) is represented by a Boltzmann temperature of 870±80 K. The H2S+(A˜ 2A1–X˜ 2B1) emission, which was assigned for the first time in the Penning ionization of H2S, primarily consists of the bending progressions. The internal populations of H2S+(A˜ ) were analyzed using the vibrational energies and Einstein's A coefficients calculated in this study. The details of the calculation and derived spectroscopic constants are reported in the accompanying paper, Paper I. The populations obtained for the bending vibration (ν' 2) of H2S+(A˜ ) show an inverted distribution with a peak at ν' 2=3. This distribution is shifted lower compared that with a peak at ν' 2=4 – 5 observed by He*(2 3S) Penning ionization electron spectroscopy and that with a peak at ν' 2=6 – 7 predicted by the theoretical Franck–Condon factors for the H2S(X˜ )–H2S1(A˜ ) ionization. The origin of the difference is discussed concerning the formation mechanism of H2S1(A˜ 2A1).
掲載誌名
Journal of Chemical Physics
119巻
12号
開始ページ
5882
終了ページ
5888
出版年月日
2003-09-22
出版者
American Institute of Physics
ISSN
0021-9606
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 2003 American Institute of Physics.
関連情報URL
部局名
理学研究科