Rotational Energy Transfer in Collisions between Orbitally Non-Degenerate Open-Shell Systems

摘要: The theory is developed for the rotational energy transfer induced in an open-shell molecule by collision with atom. consequences of exchange interaction between such systems are investigated and related to behaviour unpaired electron spins during inelastic collisions. coupled equations closed shell case first developed, generalized derived matrix elements a spin-independent potential. spin-exchange potential openshell species then expressed form suitable scattering this leads coupling basis which includes spin. Nuclear spin also included simple extension set. It argued that many collisions leading will be sufficiently weak can treated use restricted distorted-wave. Born approximation. This method derivation expressions cross-sections both spin-correlated cases. influence forces manifest branching fractions multiplets, relate different $\Delta J$ associated each change quantum numbers. A general expression hyperfine multiplets derived. discussion deals extent practice. shows how results experimental investigations as those following paper might interpreted. way propensity rules may affected interactions illustrated reference model H + CN NH$_{2}$. In conclusion it noted take place naturally upper atmosphere interstellar space.