POSITRON SCATTERING FROM POLAR-MOLECULES - ROTOVIBRATIONALLY INELASTIC-COLLISIONS WITH CO TARGETS

Quantum calculations have been carried out on the vibrational and rota tional excitation processes for CO molecules in collision with positro n projectiles below the threshold of Ps formation (E(coll)less than or equal to 7 eV). The coupled equations have been solved for the vibrat ionally inelastic process in the body-fixed frame of reference, and Bo rn-type corrections for the divergent behavior of the angular distribu tions due to the permanent molecular dipole have been applied. Detaile d comparisons are made between the partial (rotational and/or vibratio nal) integral and differential cross sections and earlier available ca lculations and measurements. [S1050-2947(97)09309-8].