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Proceedings Paper

Recoil vector correlations in multiparticle fragmentation: the examination of orientation effects in dissociative vuv photoionization
Author(s): Ivan Powis; Peter Downie
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Paper Abstract

The lab frame correlation between the recoil of electron and daughter ions from dissociative photoionization of individual molecules can be observed using imaging and coincidence techniques. Since, however, each may have some preferred angular distribution in the anisotropic molecular field (which will depend on the specific dynamics of the fragmentation processes), their recoil directions will be mutually correlated with the molecular coordinate frame, permitting the molecule frame photoelectron angular distribution to be inferred. This effectively allows free, oriented species to be studied in the gas phase. A feature of these experiments is that by establishing molecular orientation (and not just alignment) odd harmonics of the electron distribution are revealed. It is shown that a reversal of orientation in the angular distribution can provide a clear signature of the existence of a shape resonance without requiring observation to be made directly at the resonant energy.

Paper Details

Date Published: 18 September 1995
PDF: 11 pages
Proc. SPIE 2548, Laser Techniques for State-Selected and State-to-State Chemistry III, (18 September 1995); doi: 10.1117/12.220870
Show Author Affiliations
Ivan Powis, Univ. of Nottingham (United Kingdom)
Peter Downie, Univ. of Nottingham (United Kingdom)


Published in SPIE Proceedings Vol. 2548:
Laser Techniques for State-Selected and State-to-State Chemistry III
John W. Hepburn, Editor(s)

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