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Phys. Rev. C 56, R1206 - R1209 (1997)

Proton scattering on the unstable 38S nucleus: Isovector contribution to the 21+ state

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J. H. Kelley1, T. Suomijärvi1,2, S. E. Hirzebruch1,2, A. Azhari2,3, D. Bazin2, Y. Blumenfeld1, J. A. Brown2, P. D. Cottle4, S. Danczyk2,3, M. Fauerbach2,3, T. Glasmacher2,3, J. K. Jewell4, K. W. Kemper4, F. Maréchal1, D. J. Morrissey2,5, S. Ottini6, J. A. Scarpaci1, and P. Thirolf2
1Institut de Physique Nucléaire, IN2P3-CNRS, 91406 Orsay, France
2National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824
3Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824
4Department of Physics, Florida State University, Tallahassee, Florida 32306
5Department of Chemistry, Michigan State University, East Lansing, Michigan 48824
6SEPhN, DAPNIA, CEA Saclay, 91191 Gif sur Yvette, France

Rapid Communication Received 26 February 1997

A 39A MeV 38S radioactive beam was used with inverse kinematics to measure angular distributions for elastic and inelastic proton scattering from a CH2 target. Optical potential and folding model calculations are compared with the elastic distribution. Using coupled channel calculations, the β2 value for the 21+ state is determined to be 0.35±0.04. This value, when compared with the corresponding result from a Coulomb excitation measurement, leads to Mn/Mp=(1.5±0.3)N/Z, indicating an isovector contribution to the 21+ state of 38S.


©1997 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.56.R1206
DOI: 10.1103/PhysRevC.56.R1206
PACS: 21.10.Re, 25.40.Ep, 25.60.-t, 27.30.+t

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