15min:

YANGSOO KIM, JULIAN FLENIKEN AND HENNING MEYER, Department of Physics and Astronomy, \newline University of Georgia, Athens, GA 30602-2451.

\noindent In our recent work on NO-Ar complexes we have shown how the rotational structure of the two-photon spectra can be analyzed in terms of the spherical tensor components of the two-photon absorption operator characteristic to the transition in the bare NO molecule.^a,b Due to spectral congestion we have not yet been able to analyze the NO-Ar spectra in the region of the Rydberg states F² and H² , H' ² . In this contribution, we will present the analogous results for the NO-Ne complex. Because of the weaker interaction, the various band systems correlating with the Rydberg states C² (v_NO=1,2, and 4), E² , F ² , and H² , H'² are well separated from each other. Apart from the H state for which a five membered stretch progression is observed, the spectra assigned to the lower Rydberg states show only transitions to two stretch vibrational levels. Spectra associated with the vibrational levels of the C² state show very different predissociation behavior compared to the corresponding NO-Ar spectra. The results indicate important differences in electronic state mixing between the C² and B² states upon complexation.

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\noindent ^aH. Meyer, J. Chem. Phys. \underline107, 7732(1997).

\noindent ^bH. Meyer, J. Chem. Phys. \underline107, 7721(1997).