Electronic emission spectroscopy of Group IV tetrachloro molecular ions

I. R. Lambert, S. M. Mason, R. P. Tuckett, A. Hopkirk

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Abstract

Two broad continuous bands are observed in the visible region following electron impact ionization of a He‐seeded molecular beam of SiCl4 or GeCl4. By using tunable vacuum UV radiation from a synchrotron source to measure the threshold energy at which the fluorescence bands occur, it is shown that the bands are related to the initial formation of the C̃ 2T2 state of the parent ion SiCl+4/GeCl+4. By comparison with photoelectron data, the bands are assigned to bound–free transitions in SiCl+4/GeCl+4 C̃ 2T2–Ã 2T2 and X̃ 2T1. The C̃ state of CCl+4does not fluoresce. The results are compared with the electronic emission spectra of the three tetrafluoro molecular ions.
Original languageEnglish
Pages (from-to)2675-2682
JournalJournal of Chemical Physics
Volume89
Issue number5
DOIs
Publication statusPublished - 1 Sep 1988

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