TITLE

Characterization of asymmetry transients in rotational coherence spectroscopy

AUTHOR(S)
Joireman, Paul W.; Connell, Leslie L.; Ohline, Shane M.; Felker, Peter M.
PUB. DATE
March 1992
SOURCE
Journal of Chemical Physics;3/15/1992, Vol. 96 Issue 6, p4118
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The characteristics and origin of a new type of rotational coherence effect—asymmetry transients—are considered. Asymmetry transients are of two types, which we call C-type and A-type, respectively. C-type features are spaced by time intervals equal to 1/(4C). A-type features are spaced by time intervals equal to 1/(4A). Both types of transients can provide information on rotational constants that is not available from other types of rotational coherence effects. We show that the C-type transients arise from coherences between rotational eigenstates of the form Jτ and (J+2)τ-2 (in the Jτ notation) and that the A-type ones arise from coherences between eigenstates Jτ and (J+2)τ+2. The fact that such coherences produce asymmetry transients is shown to be a consequence of the limiting behavior of asymmetric top energy levels at high values of J. Experimental results in which asymmetry transients are present are reported for jet-cooled perylene, tryptamine (D conformer), 1-naphthol–water, and fluorene–benzene.
ACCESSION #
7642683

 

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