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γ-ray spectroscopy of neutron-rich 40S

Abstract : Yrast states up to (6+) in the neutron-rich 40S nucleus have been studied using binary grazing reactions produced by the interaction of a 215 MeV beam of 36S ions with a thin 208Pb target. The novel experimental setup that combines the large acceptance magnetic spectrometer, PRISMA, and the high-efficiency γ-ray detection array, CLARA, was used. A new γ-ray transition at an energy of 1572 keV was observed and tentatively assigned to the (6+)→(4+) transition. A comparison of experimental observations and the results of large-scale 0ℏω sd-pf shell-model calculations indicates that one- and two-proton excitations from the 2s1/2 to the 1d3/2 orbitals play an important role in reproducing the 40S yrast level structure and the published B(E2;0g.s.+→21+) value. The structure of the yrast states of the even-A isotopes of sulfur is interpreted in terms of the configurations of valence protons and neutrons within the context of large-scale 0ℏω sd-pf shell-model calculations.
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http://hal.in2p3.fr/in2p3-00492742
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Submitted on : Wednesday, June 16, 2010 - 5:36:45 PM
Last modification on : Wednesday, December 2, 2020 - 4:36:04 PM

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Z. M. Wang, R. Chapman, X. Liang, F. Haas, F. Azaiez, et al.. γ-ray spectroscopy of neutron-rich 40S. Physical Review C, American Physical Society, 2010, 81, pp.054305. ⟨10.1103/PhysRevC.81.054305⟩. ⟨in2p3-00492742⟩

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