High-spin excitations of 35/84Br49 and 35/85Br50:: Mapping the proton sub-shells towards 78Ni

被引：31

作者：

Astier, A. ^{[1
]}

Porquet, M. -G.

Venkova, Ts.

Deloncle, I.

Azaiez, F.

Buta, A.

Curien, D.

Dorvaux, O.

Duchene, G.

Gall, B. J. P.

Khalfallah, F.

Piqueras, I.

Rousseau, M.

Meyer, M.

Redon, N.

Stezowski, O.

Lucas, R.

Bogachev, A.

机构：

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

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

[3] BAS, INRNE, Sofia 1784, Bulgaria

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

[5] INPL, IN2P3, CNRS, F-69622 Villeurbanne, France

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

[7] CEA Saclay, DSM DAPNIA SPhN, F-91191 Gif Sur Yvette, France

[8] JINR, Dubna 142080, Moscow Region, Russia

来源：

EUROPEAN PHYSICAL JOURNAL A | 2006年 / 30卷 / 03期

关键词：

D O I：

10.1140/epja/i2006-10151-4

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 Br-84,Br-85 nuclei have been produced as fission fragments in the fusion reaction O-18+Pb-208 at 85 MeV bombarding energy and studied with the Euroball IV array. The high-spin states of the odd-odd Br-84 nucleus have been identified for the first time, the observed structure being built on the known 6(-) isomeric state. High-spin states of Br-85 have been observed up to 5.4 MeV excitation energy and spin I similar to 21/2. From angular correlation analysis, spin values have been assigned to most of the Br-85 excited states up to 4 MeV. None of these excited states has been found to exhibit a delayed decay having T-1/2 > 10ns. All the observed states in Br-84,Br-85 can be described by various proton excitations involving at least the two sub-shells (pi f(5/2) and pi p(3/2)) located just above the Z = 28 shell closure.

引用

页码：541 / 549

页数：9

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