✦ LIBER ✦

Mass-selected molecular ion spectra: (1+1)-Photodissociation spectroscopy of CH3I+ and CD3I+

✍ Scribed by R. Weinkauf; K. Walter; U. Boesl; E.W. Schlag

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 752 KB
Volume: 141
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(87)85022-4

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✦ Synopsis

The first well resolved (I + 1 )-photodissociation spectra of molecular ions are presented. By separating the spectroscopic step (first photon) and the dissociation step (second photon) we could extend the accessible spectral region of CH,I* and CD31+ considerably. The ions are prepared in the vibrationless ground state by MPI in a supersonic molecular beam. A new detection technique is presented with high discrimination between wanted and unwanted ionic species. Furthermore, another new technique for unimolecular decay measurements delivers useful information for the assignment of the ion spectra. We found an improved assignment for CH,I+ and CD,I+ with consequences for molecular constants.

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