Benchmark Nonperturbative Calculations for the Electron-Impact Ionization of Li(2s) and Li(2p)

COLGAN, J.; PINDZOLA, M. S.; MITNIK, D. M.; GRIFFIN, D. C.; BRAY, I.

PHYSICAL REVIEW LETTERS

The American Physical Society

Año: 2001 vol. 87 p. 213201 - 213205

0031-9007

Three independent nonperturbative calculations are reported for the electron-impact ionization of both the ground and first excited states of the neutral lithium atom. The time-dependent close-coupling, the R matrix with pseudostates, and the converged close-coupling methods yield total integral cross sections that are in very good agreement with each other, while perturbative distorted-wave calculations yield cross sections that are substantially higher. These nonperturbative calculations provide a benchmark for the continued development of electron-atom experimental methods designed to measure both ground and excited state ionization.