Abstract
The and excitations of the hydrogenic ions and are studied using a pseudostate expansion. A small (, ) basis is used above the threshold while in the resonance region between the and thresholds a larger (, , , and ) set is employed. The coupled integrodifferential equations are solved by a variational approach. High-energy and high- results are found using the Coulomb-Born approximation with exchange. Positions and widths of resonances are given. An analytic fit to the calculated matrices is used to determine cross sections in the resonance region. Excitation rates are computed.
- Received 22 June 1981
DOI:https://doi.org/10.1103/PhysRevA.24.2372
©1981 American Physical Society