Many-body theory of gamma spectra from positron-atom annihilation

L. J. M. Dunlop, G. F. Gribakin

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

A many-body theory approach to the calculation of gamma spectra of positron annihilation on many-electron atoms is developed. We evaluate the first-order correlation correction to the annihilation vertex and perform numerical calculations for the noble gas atoms. Extrapolation with respect to the maximal orbital momentum of the intermediate electron and positron states is used to achieve convergence. The inclusion of correlation corrections improves agreement with experimental gamma spectra.
Original languageEnglish
Pages (from-to)1647-1668
Number of pages22
JournalJournal of Physics B: Atomic Molecular and Optical Physics
Volume39
Issue number7
DOIs
Publication statusPublished - 14 Apr 2006

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy(all)

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