title: Benchmark nonperturbative calculations for the electron-impact ionization of Li(2s) and Li(2p).
abstract: 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.
authors.affiliation: Department of Physics, Auburn University, Auburn, Alabama 36849, USA.
authors.forename: J
authors.initials: J
authors.lastname: Colgan
authors.forename: M S
authors.initials: MS
authors.lastname: Pindzola
authors.forename: D M
authors.initials: DM
authors.lastname: Mitnik
authors.forename: D C
authors.initials: DC
authors.lastname: Griffin
authors.forename: I
authors.initials: I
authors.lastname: Bray