Abstract
We investigate the photodissociation, geminate recombination and relaxation dynamics in size-selected I2−⋅Arn cluster ions using a coupled quantum-classical molecular dynamics method and a model Hamiltonian gained from diatomics-in-ionic systems. We calculate photofragmentation yields of various charged product clusters of the dissociated I−⋅Arf or recombined I2−⋅Arf′ forms as a function of precursor cluster size and find almost quantitative agreement with experimental results. The trends in photofragmentation are explained in terms of various participating electronically nonadiabatic channels coupled with vibrational relaxation on these different surfaces. We also explore the role of long range electrostatic interactions and underlying precursor cluster geometry on the photofragmentation dynamics.
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