High-spin states with seniority v=4, 5, and 6 in 119-126Sn

被引：44

作者：

Astier, A. ^{[1
,2
]}

Porquet, M. -G. ^{[1
,2
]}

Theisen, Ch. ^{[3
]}

Verney, D. ^{[4
,5
]}

Deloncle, I. ^{[1
,2
]}

Houry, M. ^{[3
]}

Lucas, R. ^{[3
]}

Azaiez, F. ^{[6
,7
]}

Barreau, G. ^{[8
,9
]}

Curien, D. ^{[6
,7
]}

Dorvaux, O. ^{[6
,7
]}

Duchene, G. ^{[6
,7
]}

Gall, B. J. P. ^{[6
,7
]}

Redon, N. ^{[10
,11
]}

Rousseau, M. ^{[6
,7
]}

Stezowski, O. ^{[10
,11
]}

机构：

[1] IN2P3 CNRS, CSNSM, F-91405 Orsay, France

[2] Univ Paris 11, F-91405 Orsay, France

[3] CEA, Ctr Saclay, IRFU Serv Phys Nucl, F-91191 Gif Sur Yvette, France

[4] IN2P3 CNRS, IPNO, F-91406 Orsay, France

[5] Univ Paris 11, F-91406 Orsay, France

[6] IN2P3 CNRS, IPHC, F-67037 Strasbourg 2, France

[7] Univ Strasbourg, F-67037 Strasbourg 2, France

[8] IN2P3 CNRS, CENBG, F-33175 Gradignan, France

[9] Univ Bordeaux 1, F-33175 Gradignan, France

[10] IN2P3 CNRS, IPNL, F-69622 Villeurbanne, France

[11] Univ Lyon 1, F-69622 Villeurbanne, France

来源：

PHYSICAL REVIEW C | 2012年 / 85卷 / 05期

关键词：

HEAVY-ION COLLISIONS; INDUCED FISSION; YRAST ISOMERS; GE DETECTORS; SN ISOTOPES; NUCLEI; SUBSHELL; SHELL; BANDS;

D O I：

10.1103/PhysRevC.85.054316

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 Sn119-126 nuclei have been produced as fission fragments in two reactions induced by heavy ions: C-12 + U-238 at a bombarding energy of 90 MeV and O-18 + Pb-208 at 85 MeV. Their level schemes have been built from gamma rays detected using the Euroball array. High-spin states located above the long-lived isomeric states of the even- and odd-A Sn120-126 nuclei have been identified. Moreover, isomeric states lying around 4.5 MeV have been established in Sn-120,Sn-122,Sn-124,Sn-126 from the delayed coincidences between the fission fragment detector SAPhIR and the Euroball array. The states located above 3 MeV excitation energy are ascribed to several broken pairs of neutrons occupying the nu h(1) (1/2) orbit. The maximum value of angular momentum available in such a high-j shell, i.e., for midoccupation and the breaking of the three neutron pairs, has been identified. This process is observed for the first time in spherical nuclei.

引用

页数：19

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