Resonances in the photolysis of HCl in Ar-CHl: Imaging of a resonance wave function in the photofragment angular distribution

The photodissociation of HCl in the Ar-HCl cluster is studied theoretically, with the focus on the angular distribution of the H atom photofragments. Excited state resonances, in which the H atom rattles between the heavy atoms, contribute to the process. It is found that for excitation into a resonance state, the measurable angular distribution of H atoms from Ar-HCl clusters oriented in space provides a mapping of the resonance wave function. This predicts the possibility of imaging resonance wave functions in such processes.