Effect of a finite energy spread of the positron beam on the threshold behaviour of the positron annihilation cross section

J. Ludlow, G. F. Gribakin

Research output: Contribution to journalArticle

Abstract

In a recent paper [Phys. Rev. Lett. 88, 163202 (2002)] we established the threshold behavior of the cross section of positron-atom annihilation into two gamma quanta near the positronium (Ps)-formation threshold. Here, the near-threshold behavior of the positron 3 gamma annihilation cross section and its relation to the ortho-Ps-formation cross section are determined. We also analyze the feasibility of observing these effects by examining the effect of the ?nite-energy resolution of a positron beam on the threshold behavior.
Original languageEnglish
Pages (from-to)064704-1-064704-4
Number of pages4
JournalPhysical Review A
Volume66
DOIs
Publication statusPublished - 31 Dec 2002

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