Shape evolution in heavy sulfur isotopes and erosion of the N=28 shell closure

D. Sohler, Zs Dombrádi, J. Timár, O. Sorlin, F. Azaiez, F. Amorini, M. Belleguic, C. Bourgeois, C. Donzaud, J. Duprat, D. Guillemaud-Mueller, F. Ibrahim, J. A. Scarpaci, M. Stanoiu, M. J. Lopez, M. G. Saint-Laurent, F. Becker, F. Sarazin, C. Stodel, G. VoltoliniS. M. Lukyanov, V. Maslov, Yu E. Penionzhkevich, M. Girod, S. Péru, F. Nowacki, G. Sletten, R. Lucas, C. Theisen, D. Baiborodin, Z. Dlouhy, J. Mrazek, C. Borcea, A. Bauchet, C. J. Moore, M. J. Taylor

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Abstract

The structure of neutron-rich 40,42,44s nuclei has been investigated through in-beam γ-ray spectroscopy using the fragmentation reaction of a 60 MeV A 48Ca beam on a thin Be target. Eγ, Iγ, γγ-coincidence, and γ-ray angular distributions were measured for each produced fragment. The level schemes previously containing only a single γ transition were extended, and spin values were proposed for the new states. The experimental results were interpreted by use of microscopic collective-model and large-scale shell-model calculations. The results of the model calculations are consistent with each other, and give a reasonable description of the experimental results. Both models predict an erosion of the N = 28 shell closure at Z = 16 and suggest a deformed ground state for 40,42S and a spherical-deformed mixed configuration for 44S.

Original languageEnglish
Article number054302
Pages (from-to)543021-5430217
Number of pages4887197
JournalPhysical Review C - Nuclear Physics
Volume66
Issue number5
Publication statusPublished - Nov 1 2002

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Sohler, D., Dombrádi, Z., Timár, J., Sorlin, O., Azaiez, F., Amorini, F., Belleguic, M., Bourgeois, C., Donzaud, C., Duprat, J., Guillemaud-Mueller, D., Ibrahim, F., Scarpaci, J. A., Stanoiu, M., Lopez, M. J., Saint-Laurent, M. G., Becker, F., Sarazin, F., Stodel, C., ... Taylor, M. J. (2002). Shape evolution in heavy sulfur isotopes and erosion of the N=28 shell closure. Physical Review C - Nuclear Physics, 66(5), 543021-5430217. [054302].