Nuclear structure in the vicinity of shell closures far from stability

被引：0

作者：

Grawe, H ^{[1
]}

Górska, M ^{[1
]}

Döring, J ^{[1
]}

Fahlander, C ^{[1
]}

Palacz, M ^{[1
]}

Nowacki, F ^{[1
]}

Caurier, E ^{[1
]}

Daugas, JM ^{[1
]}

Lewitowicz, M ^{[1
]}

Sawicka, M ^{[1
]}

Pfützner, M ^{[1
]}

Grzywacz, R ^{[1
]}

Rykaczewski, K ^{[1
]}

Sorlin, O ^{[1
]}

Leenhardt, S ^{[1
]}

Azaiez, F ^{[1
]}

Rejmund, M ^{[1
]}

Hauschild, K ^{[1
]}

Uusitalo, J ^{[1
]}

机构：

[1] GSI Darmstadt, D-64291 Darmstadt, Germany

来源：

4TH SYMPOSIUM ON NUCLEAR PHYSICS | 2001年 / 561卷

关键词：

D O I：

暂无

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The status of experimental approach to Sn-100 and Ni-78 is reviewed. Revised single particle energies for neutrons are deduced for the N=Z=50 shell closure and evidence for low lying I-pi=2(+) and (3)- states is presented. Moderate E2 polarization charges of 0.1 e and 0.6 e are found to reproduce the experimental data when core excitation of Sn-100 is properly accounted for in the shell model. For the neutron rich Ni region no conclusive evidence for an N=40 subshell is found, whereas firm evidence for the persistence of the N=50 shell at Ni-78 is inferred from the existence of seniority isomers. The disappearance of this isomerism in the mid vg(9/2) shell is discussed. The spectroscopy of Th-216 disproves the existence of a Z=92 shell gap as predicted by some recent mean field calculations. Inversion of the pih(9/2) and f(7/2) orbitals at Z=90 is ascribed to the coupling of the f(7/2) (and i(13/2)) protons to the low-lying 3- state (hw(3)=1.69 MeV).

引用

页码：287 / 300

页数：14

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