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Excitation of giant spin-isospin multipole vibrations in Fe and Ni |
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| Authors: | J Rapaport T Taddeucci T P Welch |
| Institution: | Ohio University, Athens, Ohio 45701, USA Niels Bohr Institute, University of Copenhagen, DK-2100, Copenhagen Ø, Denmark Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA Ohio State University, Columbus, Ohio 43210, USA Indiana University, Bloomington, Indiana 47405, USA EG and G, Los Alamos Office, Los Alamos, New Mexico 87544, USA University of Colorado, Boulder, Colorado 80309, USA |
| Abstract: | Data on (p,n) reactions at 120 and 160MeV have been used to study the excitation of spin-isospin multipole vibrations in 54, 56Fe and 58, 60Ni. In particular, transitions characterized by L = 0 transfer are identified as spin-isospin transitions (excitation of Gamow-Teller states) or as isospin transitions (excitation of isobaric analog states). An effort is made to estimate Gamow-Teller strength, B(GT), at excitation energies between 20–40 MeV. A comparison between GT and M1 strengths is presented for 58, 60Ni. Shell-model calculations for total strengths, Σ B(GT), are compared with the observed results. |
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