Theoretical study of the photodetachment of OHCl−

The Born-Oppenheimer type separation between light and heavy nuclear motions is used to calculate the OHCl− photodetachment spectrum. The scattering wavefunction related to the dissociation of OHCl is obtained either as a multi-state expansion or as a single product of two wavefunctions that describe the light and heavy nuclear motions. The considered OHCl potential energy surfaces, a LEPS and a fitted ab initio surface, lead to different photodetachment spectra. However, comparison with experiment does not allow a choice of the better surface. Peaks in the spectrum are assigned to direct (resonance-free) transitions to hindered rotor states of the OH(v = 0, 1) molecule.