High-spin excitations of 81,82,83,85Se: Competing single-particle and collective structures around N=50

被引：19

作者：

Porquet, M. -G. ^{[1
,4
]}

Astier, A. ^{[1
,4
]}

Venkova, Ts. ^{[1
,2
,4
]}

Prevost, A. ^{[1
,4
]}

Deloncle, I. ^{[1
,4
]}

Azaiez, F. ^{[3
,5
]}

Buta, A. ^{[3
,5
]}

Curien, D. ^{[3
,5
]}

Dorvaux, O. ^{[3
,5
]}

Duchene, G. ^{[3
,5
]}

Gall, B. J. P. ^{[3
,5
]}

Khalfallah, F. ^{[3
,5
]}

Piqueras, I. ^{[3
,5
]}

Rousseau, M. ^{[3
,5
]}

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

Redon, N. ^{[6
,7
]}

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

Lucas, R. ^{[8
]}

Bogachev, A. ^{[9
]}

机构：

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

[2] BAS, INRNE, Sofia 1784, Bulgaria

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

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

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

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

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

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

[9] Joint Inst Nucl Res Dubna, Dubna 142080, Moscow Region, Russia

来源：

EUROPEAN PHYSICAL JOURNAL A | 2009年 / 39卷 / 03期

关键词：

GE DETECTORS; SHELL-MODEL; HEAVY-IONS; ISOTONES; FISSION; STABILITY; ISOTOPES; ENERGY; NI-78; SUBSHELLS;

D O I：

10.1140/epja/i2008-10723-2

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 Se-81,Se-82,Se-83,Se-85 nuclei have been produced as fission fragments in the fusion reaction O-18 + Pb-208 at 85MeV bombarding energy and studied with the Euroball IV array. Their high-spin level schemes have been built from the triple gamma-ray coincidence data and gamma-gamma angular correlations have been analyzed in order to assign spin and parity values to many observed states. The lowest-spin states of the two-neutron and three-neutron configurations are strongly mixed with two-proton excitations among the fp orbits. On the other hand, the highest-spin states of these neutron configurations are found to remain almost pure. Neutron excitation across the N = 50 gap is observed both in Se-83(49) and in Se-85(51).

引用

页码：295 / 306

页数：12