Gamow-teller strength in the O18(p,n)F18 reaction at 135 MeV

B. D. Anderson, A. Fazely, R. J. McCarthy, P. C. Tandy, J. W. Watson, R. Madey, W. Bertozzi, T. N. Buti, J. M. Finn, J. Kelly, M. A. Kovash, B. Pugh, B. H. Wildenthal, C. C. Foster

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27 Scopus citations


The distribution of Gamow-Teller strength in the O18(p,n)F18 reaction was studied at a bombarding energy of 135 MeV. Five 1+, T=0 states are identified below Ex=7 MeV and a concentration of 1+ states of presumed T=1 character is observed between Ex=9.5 and 12 MeV. Approximately 82% of the 1+ strength is concentrated into the ground-state transition and only 5.5% is seen in the T=1 component. Normalization of the ground-state transition to the known Gamow-Teller matrix element from the analogous beta decay of Ne18 allows the (p,n) cross sections to be related to the Gamow-Teller strength. The resulting total Gamow-Teller strength observed in the (p,n) reaction is about two-thirds of the minimum value required by the sum rule for a T=1 nucleus. This result is in reasonable agreement with the total Gamow-Teller strength predicted from a shell-model calculation which uses empirically renormalized single-particle Gamow-Teller matrix elements. The concentration of the T=0 strength predominantly into the ground state and the observed ratio of T=1 to T=0 strength also are consistent with these calculations. NUCLEAR REACTIONS O18(p,n)F18, E=135 MeV; neutron spectra measured in 3°steps between 0°and 69°; angular distributions extracted for separate transitions. Strengths of forward-peaked transitions compared with shell-model predictions of Gamow-Teller strength.

Original languageEnglish
Pages (from-to)1387-1393
Number of pages7
JournalPhysical Review C - Nuclear Physics
Issue number4
StatePublished - 1983

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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