The (7Li,7Beγ) reaction and isovector spin strength in Ca40

J. S. Winfield, D. Beaumel, S. Galès, H. Laurent, I. Lhenry, J. M. Maison, G. M. Crawley, S. Danczyk, S. E. Hirzebruch, J. C. Stas̆ko, and T. Suomijärvi
Phys. Rev. C 54, 125 – Published 1 July 1996
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Abstract

The Ca40(7Li,7Beγ) reaction at E(7Li)/A = 70 MeV has been used to investigate isovector giant resonances and to measure the ratio of ΔS=1 to ΔS=0 spin strength in Ca40 at high excitation energy. In the singles spectrum, the analogue of the giant dipole resonance is observed. Another resonance is observed at Ex≊15 MeV in the residual nucleus, which we suggest is a collective 2 state. The isovector spin transfer strength at high excitation for the calcium target is compared to that measured with a carbon target under the same experimental conditions. Although more spin transfer strength at high excitation is observed for the calcium target than for the carbon target, this only accounts in part for an apparent discrepancy between previous Ca40(p→,p) and C12(7Li,7Be) experiments. The general utility of the (7Li, γ7) reaction is discussed. © 1996 The American Physical Society.

  • Received 19 January 1996

DOI:https://doi.org/10.1103/PhysRevC.54.125

©1996 American Physical Society

Authors & Affiliations

J. S. Winfield, D. Beaumel, S. Galès, H. Laurent, I. Lhenry, and J. M. Maison

  • Institut de Physique Nucléaire, IN2P3-CNRS, 91406 Orsay Cedex, France

G. M. Crawley, S. Danczyk, S. E. Hirzebruch, J. C. Stas̆ko, and T. Suomijärvi

  • National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824

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Vol. 54, Iss. 1 — July 1996

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