Pion absorption on He3 at T=62.5 and 82.8 MeV

K. A. Aniol, A. Altman, R. R. Johnson, H. W. Roser, R. Tacik, U. Wienands, D. Ashery, J. Alster, M. A. Moinester, E. Piasetzky, D. R. Gill, J. Vincent

Research output: Contribution to journalArticlepeer-review

Abstract

Pion absorption in He3 was studied at T=62.5 and 82.8 MeV using nucleon-nucleon coincidences. For + absorption on proton-neutron pairs the differential cross section is the same as that for ++d p+p except for an increase by a factor of about 1.5. For - absorption on the proton-proton pair, the differential cross section is asymmetric about 90°, indicating possible isospin mixing. The total cross sections pn(+) are 10.2 0.9 mb and 13.5 1.3 mb at 62.5 and 82.8 MeV and for pp(-) are 0.70 0.07 mb and 0.92 0.10 mb at 62.5 and 82.8 MeV. The three-body absorption cross sections for + and - are found to be comparable to each other and show no strong energy dependence. The three-body absorption cross section 3(+) is 6.7 2.5 mb and 5.7 2.3 mb and for -, 3(-) is 8.7 1.4 mb and 6.5 2.0 mb at 62.5 and 82.8 MeV, respectively.

Original languageEnglish
Pages (from-to)1714-1726
Number of pages13
JournalPhysical Review C - Nuclear Physics
Volume33
Issue number5
DOIs
StatePublished - 1986

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