METASTABLE DECAY OF MERCURY/CESIUM COMPLEX CLUSTER

T. Sakurai, H. Ito, T. Matsuo and I. Katakuse
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T. Sakurai: Department of Physics, Faculty of Science, Osaka University, Toyonaka 560, Japan
H. Ito: Department of Physics, Faculty of Science, Osaka University, Toyonaka 560, Japan
T. Matsuo: Department of Physics, Faculty of Science, Osaka University, Toyonaka 560, Japan
I. Katakuse: Department of Earth and Space Sciences, Faculty of Science, Osaka University, Toyonaka 560, Japan

Surface Review and Letters (SRL), 1996, vol. 03, issue 01, 573-575

Abstract: Metastable decay of mercury/cesium complex cluster,HgnCs+, was measured by using a time-of-flight mass spectrometer of Osaka University. The TOF spectrometer is comprised of four electrostatic analyzers (ESAs). By scanning the applied voltage of the ESAs, MS/MS spectra and MS/MS/MS spectra can be obtained. The product-ion spectra generated from metastable decay of the complex cluster were obtained by MS/MS analysis. The product ions of the decay were determined as Cs+andHgnCs+. Sequential decays were also observed with the MS/MS/MS analysis mode of the spectrometer. The position occurring metastable decay producing detected ion can be selected with the TOF spectrometer. To compare the product-ion yield generated at two different positions, the rate constant of the decay can be estimated. In preliminary experiments using glycerin-trimer ion, [3g+H]+, as a precursor, the obtained rate constant of the decay is 2.0×104l/s.

Date: 1996
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DOI: 10.1142/S0218625X96001030

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