The state-to-state predissociation dynamics of OC–HF upon HF stretch excitation

Photofragment angular and state distributions have been measured following the vibrational predissociation of the OC–HF complex. An F-center laser is used to pump the fundamental H–F stretching vibration of the complex and a second F-center laser is used to probe the rotational states of the HF fragment as a function of recoil angle. The complex dissociates via two different sets of channels, one that produces vCO=1, JHF=6,5,4 (intermolecular V–V transfer) and the other vCO=0, JHF=11 (V–R transfer). Analysis of the data gives correlated final state distributions, as well as an accurate value for the dissociation energy (D0) of the complex, namely 732±2 cm−1.