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Cross sections for deexcitation of He(2 3S, 2 1S and 2 1P) by SiH4 and GeH4

✍ Scribed by Hiroaki Yoshida; Yasumasa Morishima; Masatoshi Ukai; Kyoji Shinsaka; Noriyuki Kouchi; Yoshihiko Hatano

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 404 KB
Volume: 176
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(91)90150-8

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✦ Synopsis

The cross sections for the deexcitation of He(2 'S), He( 2 'S), and He{ 2 'P) by SiH, and GeH, have been measured and compared with those for the deexcitation by CH,. The major deexcitation processes are ascribed to Penning ionization. The cross sections obtained for He (2 'S) are more than two hundred times as large as the total optical-emission cross sections determined recently by another group. The magnitudes of the cross-section values obtained, which are dependent on both electronic states of excited helium atoms and target molecules. are discussed in terms ofthe energy-transfer mechanism or the interaction responsible for deexcitation transition.

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