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Shells and Shapes in the N=28 isotones

Abstract : New experimental results on 43S and 44S reveal that these nuclei are located in a transitional region of shape coexistence between the spherical 48Ca and the oblate 42Si. The origin of the deformation is discussed in terms of the evolution of the single particle energy levels leading to the compression of the energy difference of the orbitals in the sd and pf shells for protons and neutrons, respectively. Therefore, due to quadrupole excitations across the Z = 14 and N = 28 gaps, the intruder configuration in the neutron rich S isotopes became the ground state.
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Submitted on : Tuesday, July 27, 2010 - 4:44:52 PM
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L. Caceres, Zs. Dombradi, C. Force, L. Gaudefroy, S. Grévy, et al.. Shells and Shapes in the N=28 isotones. TOURS 2009 - Tours Symposium on Nuclear Physics and Astrophysics VII, Nov 2009, Kobe, Japan. pp.261-264, ⟨10.1063/1.3455946⟩. ⟨in2p3-00466118⟩

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