THEORETICAL INVESTIGATION OF THE PHOTODISSOCIATION DYNAMICS BY THE DECAY OF A NONDISSOCIATIVE EXCITED-STATE - APPLICATION TO CORE-EXCITED N-2

A theoretical model for the description of the vibrationally resolved photodissociation of diatomic molecules through the decay of bonding c ore-excited states is proposed and applied to the photodissociation in duced by the highly resolved resonant N1s --> 1 pi(g) core excitation of an isolated N-2 followed by spectator Auger decay to an excited sta te of N-2(+) which may dissociate. The photodissociation and absorptio n spectra are distinctly different. The absorption spectrum extracted from the model agrees with experimental data The kinetic energy distri butions of the photodissociation fragments contain detailed informatio n about the final state of N-2(+). Comparison with data for N+ photode sorption and electron yield data for condensed N-2 indicates that the desorption signal is dominated by an essentially purely repulsive fina l state of N-2(+).