Identification of the partial wave parameter and simplification of the differential cross section in the j zCCS approximation in molecular scattering

Abstract

The identification of the partial wave parameter ? of the J_zCCS approximation in molecular scattering theory is considered, and it is shown that if one chooses ?=l′ (the final orbital angular momentum) rather than ?=J (the total angular momentum) the full body‐fixed expression for the scattering amplitude reduces directly to the simple formula used by McGuire and Kouri. Results are cited that show that ?=l′ is not only simple, but physically reasonable, and gives much better results than ?=J.