A new way of critically assessing and compacting data for electron impact excitation of positive ions is presented. Collision strengths Ω are scaled and then plotted as functions of the colliding… Expand

It is shown that in the limit of infinite impact energies the Coulomb-Bethe total collision cross section tends to twice the value given by the Born approximation. The discrepancy can be removed by… Expand

A detailed description is given of a new method for calculating the high- velocity tail of the electron velocity distribution function in a plasma slab with large temperature and density gradients.… Expand

Publisher Summary This chapter describes the classical theory of atomic scattering. When classical methods are applied to such collisions, they complement close coupling and variational methods,… Expand