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Phys. Rev. C 63, 034322 (2001) [5 pages]

Splitting of the dipole and spin-dipole resonances

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Sam M. Austin1 *, E. Adamides1, A. Galonsky1, T. Nees1, W. A. Sterrenburg1 †, D. E. Bainum2 ‡, J. Rapaport3, E. Sugarbaker4 §, C. C. Foster5, C. D. Goodman5, D. J. Horen6 **, C. A. Goulding7 ††, and M. B. Greenfield7 ‡‡
1 National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824
2Department of Physics, Emporia State University, Emporia, Kansas 66801
3Department of Physics, Ohio University, Athens, Ohio 45701
4Department of Physics, University of Colorado, Boulder, Colorado 80309
5Indiana University Cyclotron Facility, Indiana University, Bloomington, Indiana 47405
6Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
7Department of Physics, Florida A&M University, Tallahassee, Florida 32307

Received 26 May 2000; published 21 February 2001

Cross sections for the 90,92,94Zr(p,n) reactions were measured at energies of 79.2 and 119.4 MeV. A phenomenological model was developed to describe the variation with bombarding energy of the position of the L=1 peak observed in these and other (p,n) reactions. The model yields the splitting between the giant dipole and giant spin-dipole resonances. Values of these splittings are obtained for isotopes of Zr and Sn and for 208Pb.


©2001 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.63.034322
DOI: 10.1103/PhysRevC.63.034322
PACS: 25.40.Kv, 24.30.Cz

* Electronic address: austin@nscl.msu.edu
† Present address: Department of Physics, Free University, 1007 MC Amsterdam, The Netherlands.
‡ Present address: Washburn University, Topeka, KS 66621.
§ Present address: Van de Graaff Laboratory, Ohio State University, Columbus, OH 43212.
** Present address: 19 Colonial Ave., Framingham, MA 01701.
†† Present address: LANL, MS J562 NIS-6, Los Alamos, NM 87545.
‡‡ Present address: Department of Physics, International Christian University, Mitaka, Tokyo 181, Japan.

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