The optical potential is investigated for a chemically reactive system, K CH3I, with an assumed potential of interaction among the three species, K, I, CH3. The complex optical potential satisfies an integral equation with a kernel related to the solution of the threebody problem, as given by Faddeev. In order to obtain some information on the form of the optical potential without numerical analysis, a number of approximations are introduced. The imaginary part of the optical potential, which gives rise to absorption reactive and inelastic collisions, is with these approximations essentially a delta function of the KI distance. The real part of the optical potential is similar in form to the repulsive potential estimated from elastic scattering experiments on this system. Author
Prepared in cooperation with Massachusetts Inst. of Tech., Cambridge and Harvard Univ., Cambridge, Mass.