Book/Report

FZJ-2018-02487

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Optische Spektroskopie an edelgasisolierten Silberaggregaten

Kettler, U. (Corresponding author)FZJ*

1985
Kernforschungsanlage Jülich, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/18166

Report No.: Juel-1980

Abstract: This thesis reports an extensive investigation of the electronic and vibrational properties of molecular silver clusters isolated in rare gas solids (Xe, Kr, Ar, Ne). The combination of optical absorption, laser induced fluorescence, and resonance Raman spectroscopy enables the correlation of data obtained by these techniques, which is necessary to get cluster specific Information. - Resonance Raman scattering exhibits internal stretching vibrations as well as external localized or resonant modes of silver dimers residing in different trapping sites in Xe, Kr, and Ar matrices. These modes are a measure of the guest-host interaction of the metal aggregates. In addition, coupling of the internal of localized modes of Ag$_{2}$ to the phonon spectrum of the host lattice is observed. - Vibrationally resolved laser induced fluorescence of Ag$_{2}$ molecules is observed in Ne matrices. Fine structures of these fluorescence bands are interpreted as librational modes. - Three trimer species can simultaneously be stabilized in Xe and Kr matrices. By direct optical excitation they can reversibly be transformed into one another. Resonance Raman measurements of such photosensitive trisilver clusters are realized with the aid of a dual laser beam technique, which allows to stabilize the concentration ofone of the Ag$_{3}$ species. For the first time luminescence bands of Ag$_{3}$ and higher clusters are observed.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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