SOHLER, D.; GRÉVY, S.; DOMBRÁDI, Zs.; SORLIN, O.; GAUDEFROY, L.; BASTIN, B.; ACHOURI, N.L.; ANGÉLIQUE, J.C.; AZAIEZ, F.; BAIBORODIN, D.; BORCEA, R.; BOURGEOIS, C.; BUTA, A.; BURGER, A.; CACERES, L.; CHAPMAN, R.; DALOUZY, J.C.; DLOUHY, Z.; DROUARD, A.; ELEKES, Z.; FRANCHOO, S.; IACOB, S.; KUTI, I.; LAURENT, B.; LAZAR, M.; LIANG, X.; LIÉNARD, E.; LUKYANOV, S.M.; MRAZEK, J.; NALPAS, L.; NEGOITA, F.; NOWACKI, F.; ORR, N.A.; PENIONZKHEVITCH, Yu.E.; PODOLYÁK, Zs.; POUGHEON, F.; POVES, A.; ROUSSEL-CHOMAZ, P.; STANOIU, M.; STEFAN, I.; SAINT-LAURENT, M.G.

doi:10.1016/j.physletb.2011.08.004

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SOHLER, D.

GRÉVY, S.
Noyaux exotiques [NEX]

DOMBRÁDI, Zs.

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Physics Letters B. 2011, vol. 703, p. 417-421

Elsevier

Résumé en anglais

The structure of the very neutron-rich nuclei 39Si and 41Si has been investigated via in-beam γ -ray spectroscopy and few-nucleon knockout from radioactive beams. The observation of low-lying states in 39Si is a clear evidence for a drastic lowering of the intruder neutron 3/2− state when going from Z = 20 to Z = 14. The energy of the only γ -ray transition (672(14) keV) observed in 41Si is significantly lower than that of the first excited state in 47Ca (2014 keV) suggesting a deformed ground state for 41Si. These results are consistent with large-scale shell-model calculations implying that strong proton- neutron correlations are the main reason for the lowering of the intruder configurations over the normal ones.< Réduire

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Nuclear structure

Knockout reactions

Shell closures

Neutron-rich Si nuclei

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Spectroscopy of 39,41Si and the border of the N = 28 island of inversion

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