Other
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250a.515l&link_type=abstract
In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 1: Plasma and Gas p 515-521 (SEE N87
Other
Cations, Comet Nuclei, Molecular Relaxation, Molecular Spectroscopy, Electronic Spectra, Fluorescence, Quantum Chemistry
Scientific paper
Recent laboratory studies of the electronic spectra and nonradiative relaxation properties of a number of singly-charged molecular cations are discussed. Their interest for cometary physics is emphasized. Spectroscopic information is given on CS+, SH+, CO2+, CS2+ and H2S+. Coincidence techniques have been used for studying radiationless transitions in CO2+, NH3+ and other polyatomic ions. The results have been amplified by the use of laser excitation methods in the case of CO2+. The fluorescence quantum yields are measured for several molecular ions which could be formed from parent molecules likely to exist as frozen gases in the nucleus. The possibility of spectral observation of these cations in comets is considered.
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