Complex Fano asymmetry parameters for helium L = 0, 1, 2 autoionizing levels excited by electron impact

N. L.S. Martin, B. A. Deharak, K. Bartschat

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Theoretical Fano q-parameters for He autoionizing states excited by electron impact are presented, as extracted from first- and second-order hybrid distorted-wave Born + R-matrix calculations. It is found that the q-parameters for (2s2)1S, (2p2)1D, and (2s2p)1P from the first-order calculations are essentially real quantities, while those from the second-order calculations are complex but with a real part similar to the first-order values. These findings are interpreted in terms of the relative phases of the first- and second-order amplitudes.

Original languageEnglish
Article number225201
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume42
Issue number22
DOIs
StatePublished - 2009

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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