The “island of inversion" from a nuclear momentsperspective and the g factor of 35Si |
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Authors: | G. Neyens P. Himpe D. L. Balabanski P. Morel L. Perrot M. De Rydt I. Stefan C. Stodel J. C. Thomas N. Vermeulen D. T. Yordanov |
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Affiliation: | (1) Katholieke Universiteit Leuven, I.K.S., Celestijnenlaan 200 D, 3001 Leuven, Belgium;(2) Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria;(3) CEA/DIF/DPTA/PN, BP. 12, 91680 Bruyères-le-Chatel, France;(4) GANIL, BP. 55027, 14076 Caen Cedex 5, France |
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Abstract: | This paper reviews recent results from electromagnetic moment measurements on isotopes in the island of inversion around N=20. The obtained moments on neutron rich Na, Mg, Al and Si isotopes allow to draw conclusions on the amount of intruder components in their ground state wave function, demonstrating a gradual transition from the normal sd-shell region into the island of inversion, starting at N=18 for Na, N=19 for Mg and N=20 for Al isotopes. A measurement of the ground state g factor of 35Si (N=21), using a polarized fragment beam at GANIL, is discussed in more detail. The magnetic moment μ(35Si, Iπ= 7/2-) = (-)1.638(4) μN is consistent with a normal ground state structure, dominated by a νf7/2 neutron. |
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Keywords: | 21.10.Ky – 23.20.En – 27.30.+t – |
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