Analytically continued generalized continuum distorted waves

Sheelagh O'Rourke, D.M. McSherry, Derrick Crothers

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The continuum distorted-wave eikonal-initial-state (CDW-EIS) theory of Crothers and McCann (Crothers DSF and McCann JF, 1983 J. Phys. B: At. Mol. Opt. Phys. 16 3229 ) used to describe ionization in ion-atom collisions is generalized (G) to GCDW-EIS, to incorporate the azimuthal ange dependence into the final-state wavefunction. This is accomplished by the analytic continuation of hydrogenic-like wavefunctions from below to above threshold, using parabolic coordinates and quantum numbers including magnetic quantum numbers, thus providing a more complete set of states. At impact energies lower than 25 ke V u^{-1}, the total CDW-EIS ionization cross section falls off, with decreasing energy, too quickly in comparison with experimental data by Crothers and McCann. The idea behind and motivation for the GCDW-EIS model is to improve the theory with respect to experiment, by including contributions from non-zero magnetic quantum numbers. We also therefore incidentally provide a new derivation of the theory of continuum distorted waves for zero magnetic quantum numbers while simultaneously generalizing it.
Original languageEnglish
Pages (from-to)341-351
Number of pages11
JournalJournal of Physics B: Atomic Molecular and Optical Physics
Volume36(2)
Issue number2
DOIs
Publication statusPublished - 28 Jan 2003

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