Quantum yields for the photodissociation of iodine in compressed liquids and supercritical fluids

Quantum yields of photodissociation were determined for iodine in compresse d liquid n-alkanes and supercritical CO2 and xenon after laser excitation a t 532 nm. The quantum yield decreases nearly linearly with increasing densi ty. No cluster effects at low density were observed at this excitation ener gy. Our results are compared with molecular dynamics simulations and point at the importance of kinematic processes involved in the recombination dyna mics of iodine.