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Discovery of the Shape Coexisting 0þ State in 32Mg by a Two Neutron Transfer Reaction

Abstract : The ‘‘island of inversion'' nucleus 32Mg has been studied by a (t, p) two neutron transfer reaction in inverse kinematics at REX-ISOLDE. The shape coexistent excited 0þ state in 32Mg has been identified by the characteristic angular distribution of the protons of the L ¼ 0 transfer. The excitation energy of 1058 keV is much lower than predicted by any theoretical model. The low -ray intensity observed for the decay of this 0þ state indicates a lifetime of more than 10 ns. Deduced spectroscopic amplitudes are compared with occupation numbers from shell-model calculations.
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Submitted on : Tuesday, March 8, 2011 - 4:29:18 PM
Last modification on : Monday, November 16, 2020 - 12:54:04 PM

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K. Wimmer, T. Kröll, R. Krücken, V. Bildstein, R. Gernhäuser, et al.. Discovery of the Shape Coexisting 0þ State in 32Mg by a Two Neutron Transfer Reaction. Physical Review Letters, American Physical Society, 2010, 105, pp.252501. ⟨10.1103/PhysRevLett.105.252501⟩. ⟨in2p3-00574738⟩

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