Abstract

We have studied the interaction between intense laser fields (⩽ 7 × 10 12 W/cm 2) and molecules. For the diatomic molecular ion Ar + 2 the number of photofragments as a function of laser intensity can be quantitatively explained in terms of light-induced adiabatic molecular potentials. The effects predicted by this model tend to cancel under realistic experimental conditions with a thermal distribution of the rovibrational populations. This molecular beam experiment allows for a fully quantitative comparison with theory, since only one dissociation channel is operative and all parameters relevant for a computational simulation have been determined.

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