Final-state effects in the (π-, 2N) reaction

G. Kälbermann*, J. M. Eisenberg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The (π-, 2N) reaction is studied theoretically with the specific cases of 16O(π-, 2n)14N and 16O(π-, pn)14C as calculational examples. The aim of the work is to investigate the sensitivity of the reaction to various theoretical mechanisms - especially to final-state interactions - and to confront the results with the experimental data that have become available in recent years. The final-state problem is treated including the nucleon-nucleon and nucleon-nucleus interactions simultaneously with a realistic, local and complex optical potential for the latter. The initial state includes a correlation function, and the absorption mechanism is generally taken to be the direct absorption mode, though we also study the π- and ρ-rescattering contributions to the absorption operator using a Δ-isobar intermediate-state mechanism. Angular correlations and energy distributions are found to be in reasonable agreement with experiment though the ratio of nn to np emission remains problematic.

Original languageEnglish
Pages (from-to)413-433
Number of pages21
JournalNuclear Physics A
Volume382
Issue number3
DOIs
StatePublished - 12 Jul 1982
Externally publishedYes

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