Abstract
A survey is given of recent progress in experimental studies of spectroscopy and dynamics of molecules in the superexcited states. The Platzman’s idea of the superexcited states deduced from the theoretical analysis of the interaction of ionizing radiation with matter has been recently substantiated experimentally. Most of the observed superexcited states are assigned to high Rydberg states which are vibrationally (or/and rotationally), doubly, or inner-core excited, and converge to each of ion states. Non-Rydberg superexcited states are also observed. The dissociation dynamics of these states as well as the products are highly different from those of the states excited below ionization thresholds. The neutral dissociation is unexpectedly important in comparison with ionization. Some remarks are presented of superexcited states in the condensed phase from the viewpoint to understand the primary processes in radiation chemistry.
Published Version
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