Evaluation of quantum and photoproduct yields in multiple-photon dissociation for isotope separation

Abstract

A model is constructed which evaluates the minority isotope photoproduct yield and the number of photons required per unit product for isotope separation via infrared multiple-photon dissociation by a Gaussian beam. Under most experimental conditions, these parameters are optimized if the peak central fluence is about twice the saturation fluence. The quantum yield and the photoproduct yield are then both about half that attainable if the same laser energy were instead delivered by a beam with a flat transverse profile. Specific applications to deuterium separation are also discussed.