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Theoretical investigation of the photodissociation dynamics by the decay of a non-dissociative excited state: application to core-excited N2

✍ Scribed by Zbigniew W. Gortel; Jean-Pierre de Villiers

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 508 KB
Volume: 245
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(95)00981-9

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✦ Synopsis

A theoretical model for the description of the vibrationally resolved photodissociation of diatomic molecules through the decay of bonding core-excited states is proposed and applied to the photodissociation induced by the highly resolved resonant N 1 s --* l'rrg core excitation of an isolated N 2 followed by spectator Auger decay to an excited state of N~-which may dissociate. The photodissociation and absorption spectra are distinctly different. The absorption spectrum extracted from the model agrees with experimental data. The kinetic energy distributions of the photodissociation fragments contain detailed information about the final state of Nf. Comparison with data for N ÷ photodesorption and electron yield data for condensed N 2 indicates that the desorption signal is dominated by an essentially purely repulsive final state of N~.

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