UNIMOLECULAR REACTIONS IN A SPHERICALLY SYMMETRICAL POTENTIAL .2. SOME TRACTABLE POTENTIALS

Collision cross sections derived from a long-range potential can be made more realistic through the addition of a short-range component. It is shown how this can be achieved with no loss of simplicity, and in agreement with experiment. Upon addition of a Coulombic term, improved expressions for ion-electron neutralization and thermionic emission are then obtained. These developments permit the transition between the small and large molecule regimes to be followed explicitly.