Vibronic state specific predissociation rates from excited electronic states |
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Authors: | H Hornburger M Melzig |
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Institution: | (1) Max-Planck-Institut für Quantenoptik, 85748 Garching bei München, Germany, DE |
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Abstract: | It is shown that predissociation can be perceived as a primary process due to the continuum part of a Morse oscillator potential.
In the model proposed here internal conversion to the ground state is thus not necessarily the primary process of a consecutive
dissociation but may be a simultaneous decay. As a consequence, dissociation rates should show strong variations from specific
(ro-) vibrational states of the first excited electronic states that are similar to those known from “pure” internal conversion
rates. This behaviour is demonstrated by calculating predissociation rates for the process. Especially the out-of-plane modes seem to play an extraordinary role in the excess energy behaviour of the predissociation
rate. At lower excess energies, rates from single vibronic levels with out-of-plane mode characteristics may show an increase
by several orders of magnitude.
Received: 13 November 1998 |
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Keywords: | PACS 33 50 -j Fluorescence and phosphorescence radiationless transitions quenching (intersystem crossing internal conversion)- 33 80 Gj Diffuse spectra predissociation photodissociation |
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