Complex systems angular comparisons

In addition to the relaxation data obtained from measuring lifetimes, one also would like to obtain information on the disposal of excess energy in the fragments which result from vibrational predissociation of the parent complex. This clearly involves the measurement of state-to-state dissociation rates for these complexes. Results of this type have recently been obtained from measurements of the angular distributions of the photofragments and will be discussed for systems such as HF and HCN dimers. In favorable cases data of this type can provide relative state-to-state rates which can be used as sensitive tests of the emerging theoretical methods. Comparisons with simple statistical theories show that the dissociation dynamics associated with these systems is highly non-statistical. 

---