Collapse of the N=28 shell closure in (42)Si.
Collapse of the N=28 shell closure in (42)Si.
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DOI：
10.1103/physrevlett.99.022503
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发表时间：
2007-05
影响因子：
8.6
通讯作者：
B. Bastin;S. Grévy;D. Sohler;O. Sorlin;Z. Dombrádi;N. Achouri;J. Angelique;F. Azaiez;D. Baiborodin;R. Borcea;C. Bourgeois;A. Buta;A. Bürger;A. Bürger;R. Chapman;J. Dalouzy;Z. Dlouhý;A. Drouard;Z. Elekes;S. Franchoo;S. Iacob;B. Laurent;M. Lazar;X. Liang;E. Liénard;J. Mrázek;L. Nalpas;F. Negoita;N. Orr;Y. Penionzhkevich;Z. Podolyák;F. Pougheon;P. Roussel-Chomaz;M. Saint-Laurent;M. Stanoiu;I. Stefan;F. Nowacki;A. Poves
中科院分区：
文献类型：
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作者：
B. Bastin;S. Grévy;D. Sohler;O. Sorlin;Z. Dombrádi;N. Achouri;J. Angelique;F. Azaiez;D. Baiborodin;R. Borcea;C. Bourgeois;A. Buta;A. Bürger;A. Bürger;R. Chapman;J. Dalouzy;Z. Dlouhý;A. Drouard;Z. Elekes;S. Franchoo;S. Iacob;B. Laurent;M. Lazar;X. Liang;E. Liénard;J. Mrázek;L. Nalpas;F. Negoita;N. Orr;Y. Penionzhkevich;Z. Podolyák;F. Pougheon;P. Roussel-Chomaz;M. Saint-Laurent;M. Stanoiu;I. Stefan;F. Nowacki;A. Poves
利用39 A MeV的（42，44）S次级束分裂的在束γ能谱测量了富中子（42）Si和（41，43）P的激发态能量。（42）Si的低2（+）能（770（19）keV）和（41，43）P的能级图提供了Z=14和N=28球壳闭合消失的证据，这主要归因于质子-中子张量力的作用。新的壳模型计算表明，（42）Si最好描述为变形良好的扁转子。
The energies of the excited states in very neutron-rich (42)Si and (41,43)P have been measured using in-beam gamma-ray spectroscopy from the fragmentation of secondary beams of (42,44)S at 39A MeV. The low 2(+) energy of (42)Si, 770(19) keV, together with the level schemes of (41,43)P, provides evidence for the disappearance of the Z=14 and N=28 spherical shell closures, which is ascribed mainly to the action of proton-neutron tensor forces. New shell model calculations indicate that (42)Si is best described as a well-deformed oblate rotor.