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Dissociative excitation of some metal halides by rare-gas metastable atoms

✍ Scribed by P. Baltayan; J.C. Pebay-Peyroula; N. Sadeghi

Publisher: Elsevier Science
Year: 1984
Tongue: English
Weight: 338 KB
Volume: 104
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(84)80190-6

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✦ Synopsis

Reactions of CdI2, InI, GaCI3, SnC12, TIC14, CuC1 and CuI with rare-gas He(3S), Ar (3p2), Kr (3P2) and Xe (3P2) metastable species were studied in a flowing afterglow apparatus. In all cases (except with CuX), emission from the excited states of the metal atom was observed, and with He we also observed lines from excited states of Cd + and In + ions. We verified that for Cd, In, Ga and Sn, these excited levels are populated from a first-order process. Rate constants for the different exit channels of dissociative excitation or ionization were determined. As in our work with T1 halides, we observed that when the dissociative ionization channel becomes energetically open, the efficiency for production of excited states of the neutral metal atom decreases sharply.

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