Gamow-teller transitions to Cu64 measured with the Zn64(t,He3) reaction

G. W. Hitt, R. G.T. Zegers, Sam M. Austin, D. Bazin, A. Gade, D. Galaviz, C. J. Guess, M. Horoi, M. E. Howard, W. D.M. Rae, Y. Shimbara, E. E. Smith, C. Tur

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The Zn64(t,He3) reaction has been studied by using a secondary triton beam of 115 MeV/nucleon to extract the Gamow-Teller transition-strength distribution to Cu64. The results were compared with shell-model calculations with the pf-shell effective interactions KB3G and GXPF1A and with existing data from the Zn64(d,He2) reaction. Whereas the experimental results exhibited good consistency, neither of the theoretical predictions managed to reproduce the data. The implications for electron-capture rates during late stellar evolution were investigated. The rates based on the theoretical strength distributions are lower by factors of 3.5-5 compared to the rates based on experimental strength distributions.

Original languageEnglish
Article number014313
JournalPhysical Review C - Nuclear Physics
Issue number1
StatePublished - Aug 6 2009


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