Reaction Ni58(+,pp) at T+=160 MeV

W. J. Burger, E. Beise, S. Gilad, R. P. Redwine, P. G. Roos, N. S. Chant, H. Breuer, G. Ciangaru, J. D. Silk, G. S. Blanpied, B. M. Preedom, B. G. Ritchie, M. Blecher, K. Gotow, D. M. Lee, H. Ziock

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17 Scopus citations


The reaction Ni58(+,pp) was studied with good energy resolution for an incident pion energy of 160 MeV. The angular correlation of the outgoing protons was measured for lab=30°, 75°, and 130°. From these angular correlations the contribution from direct two-nucleon absorption was extracted. A Monte Carlo calculation modeling the absorption process in terms of initial-state scattering of the pion before absorption, two-nucleon absorption, and final-state scattering of the outgoing nucleons is compared to the data. We conclude that within this framework the two-nucleon mechanism can account for less than half of the total absorption cross section in Ni58. We report results for the low-energy coincidence proton spectra (down to 5 MeV) which suggest that most of these protons come from evaporation. Angular correlation data for the reaction Ni58(-,pp) are also presented.

Original languageEnglish (US)
Pages (from-to)2215-2228
Number of pages14
JournalPhysical Review C
Issue number5
StatePublished - 1990
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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