The validity of classical trajectory and perturbative quantal methods for electron-impact ionization from excited states in H-like ions

D C Griffin, C P Ballance, M S Pindzola, F Robicheaux, S D Loch, J A Ludlow, M C Witthoeft, J Colgan, C J Fontes, D R Schultz

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Abstract

To test the validity of classical trajectory and perturbative quantal methods for electron-impact ionization of H-like ions from excited states, we have performed advanced close-coupling calculations of ionization from excited states in H, Li 2+ and B 4+ using the R -matrix with pseudo states and the time-dependent close-coupling methods. Comparisons with our classical trajectory Monte Carlo (CTMC) and distorted-wave (DW) calculations show that the CTMC method is more accurate than the DW method for H, but does not improve with n and grows substantially worse with Z , while the DW method improves with Z and grows worse with n .
Original languageEnglish
Pages (from-to)L199
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume38
Issue number12
DOIs
Publication statusPublished - 2005

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