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Discovery of the shape coexisting 0+ state in 32 Mg by a two neutron transfer reaction |
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| Authors: | Wimmer K Kr?ll T Krücken R Bildstein V Gernh?user R Bastin B Bree N Diriken J Van Duppen P Huyse M Patronis N Vermaelen P Voulot D Van de Walle J Wenander F Fraile L M Chapman R Hadinia B Orlandi R Smith J F Lutter R Thirolf P G Labiche M Blazhev A Kalkühler M Reiter P Seidlitz M Warr N Macchiavelli A O Jeppesen H B Fiori E Georgiev G Schrieder G Das Gupta S Lo Bianco G Nardelli S Butterworth J Johansen J Riisager K |
| Institution: | Physik Department E12, Technische Universit?t München, 85748 Garching, Germany. |
| Abstract: | The "island of inversion" nucleus 32 Mg has been studied by a (t, p) two neutron transfer reaction in inverse kinematics at REX-ISOLDE. The shape coexistent excited 0+ state in 32 Mg has been identified by the characteristic angular distribution of the protons of the Δ L=0 transfer. The excitation energy of 1058 keV is much lower than predicted by any theoretical model. The low γ-ray intensity observed for the decay of this 0+ 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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