In a previous paper the Hartree-Fock method has been used to calculate electron excitation
cross-sections for the ground configuration terms of O I. In the present paper the …

Quantum defect theory (qdt) is concerned with the properties of an electron in the field of a
positive ion and, in particular, with expressing those properties in terms of analytical …

Section II contains a summary of relevant collision theory methods. Section III is concerned
with heavy particle collisions: excitation of H 1s hyperfine structure (hfs) states by H atom …

The forty-seven planetaries of Paper IV are divided into two Classes:(a) with He II lines and
(b) without He II lines. From results obtained in IV, the ionized hydrogen mass M of Class (a) …

Summary The Quantum Defect Method uses interpolated or extrapolated quantum defects to
determine the asymptotic forms of atomic wave functions. The method may be used in the …

Cross sections are calculated for the transition| $\text {Fe}^{+ 13}\enspace
3p\frac12\rightarrow3p\frac32 $| produced by proton impact. The excitation rate increases …

We define stellar envelopes to be those regions of stellar interiors in which atoms exist and
are not markedly perturbed by the plasma environment. Availability of accurate and …

In the close-coupling (CC) method of electron-atom collision theory, wavefunctions Psi E for
a system containing (N+ 1) electrons are expanded in terms of products of N-electron'target' …

Consider the i—> collision to be of de-excitation type< v,). According to (6), when v,-is small,
10 becomes large for all finite L. One would expect P,,~(L) to go to zero as v,-goes to zero. In …

SUMMARY A substantial amount of data from atomic physics is required for the
interpretation of radio recombination line observations. A critical review of the available data …