Excitation of highly excited hydrogenic ions and atoms by charged particles. II

Abstract
For pt. I see abstr. A66822 of 1970. Heisenberg's form of the correspondence principle is used to study the excitation of hydrogen atoms and hydrogen-like ions by incident electrons or by incident ions. Using this correspondence principle and a generalization it is shown that there are at least four distinct ranges of the incident energy, in each of which the cross section has a different functional form. Classical perturbation theory, quantal perturbation theory (first Born) and the sudden approximation are compared, and regions of validity obtained.