The D∑ 2 A 1 - C∑ 2 T 2 emission band system of SiF + 4

Author: Mason S.M.   Tuckett R.P.  

Publisher: Taylor & Francis Ltd

ISSN: 1362-3028

Source: Molecular Physics, Vol.60, Iss.4, 1987-03, pp. : 771-778

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Abstract

The D∑ 2 A 1 - C∑ 2 T 2 emission spectrum of SiF + 4 is observed at a low rotational temperature in a crossed molecular beam/electron beam apparatus. The narrow rotational envelope of the bands confirms the assignment of the emitter as the parent molecular ion of SiF 4 . The spectrum is analysed, and the results compare excellently with photoelectron data for SiF 4 . Spin-orbit splitting and Jahn-Teller distortion are observed in the C∑ 2 T 2 state, with both v 2 ( e ) and v 4 ( t 2 ) being Jahn-Teller active vibrations.