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Phys. Rev. C 60, 034615 (1999) [12 pages]

Proton scattering by short lived sulfur isotopes

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F. Maréchal1 *, T. Suomijärvi1, Y. Blumenfeld1, A. Azhari2,3 †, E. Bauge4, D. Bazin2, J. A. Brown2 ‡, P. D. Cottle5, J. P. Delaroche4, M. Fauerbach2,3 *, M. Girod4, T. Glasmacher2,3, S. E. Hirzebruch1, J. K. Jewell5 §, J. H. Kelley1 **, K. W. Kemper5, P. F. Mantica2,6, D. J. Morrissey2,6, L. A. Riley5 ††, J. A. Scarpaci1, H. Scheit2,3 ‡‡, and M. Steiner2
1Institut de Physique Nucléaire, IN2P3-CNRS, F-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
4Commissariat à l’Energie Atomique, Service de Physique Nucléaire, Boîte Postale 12, F-91680 Bruyères-le-Châtel, France
5Department of Physics, Florida State University, Tallahassee, Florida 32306
6Department of Chemistry, Michigan State University, East Lansing, Michigan 48824

Received 1 March 1999; published 23 August 1999

Elastic and inelastic proton scattering has been measured in inverse kinematics on the unstable nucleus 40S. A phenomenological distorted wave Born approximation analysis yields a quadrupole deformation parameter β2=0.35±0.05 for the 21+ state. Consistent phenomenological and microscopic proton scattering analyses have been applied to all even-even sulfur isotopes from A=32 to A=40. The second analysis used microscopic collective model densities and a modified Jeukenne-Lejeune-Mahaux nucleon-nucleon effective interaction. This microscopic analysis suggests the presence of a neutron skin in the heavy sulfur isotopes. The analysis is consistent with normalization values for λv and λw of 0.95 for both the real and imaginary parts of the Jeukenne-Lejeune-Mahaux potential.


©1999 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.60.034615
DOI: 10.1103/PhysRevC.60.034615
PACS: 21.10.Re, 25.40.Cm, 25.40.Ep, 25.60.Bx

* Present address: Dept. of Physics, Florida State University, Tallahassee, FL 32306.
† Present address: Cyclotron Institute, Texas A&M University, College Station, TX 77843.
‡ Present address: Dept. of Physics, Millikin University, Decatur, IL 62522.
§ Present address: Idaho National Engineering Laboratory, Idaho Falls, ID 83415.
** Present address: TUNL, Duke University, Durham, NC 27708.
†† Present address: Dept. of Physics and Astronomy, Earlham College, Richmond, IN 47374.
‡‡ Present address: Max Planck Institut für Kernphysik, D-69029 Heidelberg, Germany.

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