Low-energy Coulomb excitation of 96,98Sr beams

被引：36

作者：

Clement, E. ^{[1
,2
]}

Zielinska, M. ^{[3
,4
]}

Peru, S. ^{[5
]}

Goutte, H. ^{[3
]}

Hilaire, S. ^{[5
]}

Gorgen, A. ^{[6
]}

Korten, W. ^{[3
]}

Doherty, D. T. ^{[3
,7
]}

Bastin, B. ^{[1
]}

Bauer, C. ^{[8
]}

Blazhev, A. ^{[9
]}

Bree, N. ^{[10
]}

Bruyneel, B. ^{[9
]}

Butler, P. A. ^{[11
]}

Butterworth, J. ^{[7
]}

Cederkall, J. ^{[2
,12
]}

Delahaye, P. ^{[1
,2
]}

Dijon, A. ^{[1
]}

Ekstrom, A. ^{[12
]}

Fitzpatrick, C. ^{[13
]}

Fransen, C. ^{[9
]}

Georgiev, G. ^{[14
]}

Gernhauser, R. ^{[15
]}

Hess, H. ^{[9
]}

Iwanicki, J. ^{[4
]}

Jenkins, D. G. ^{[7
]}

Larsen, A. C. ^{[6
]}

Ljungvall, J. ^{[14
]}

Lutter, R. ^{[15
]}

Marley, P. ^{[7
]}

Moschner, K. ^{[9
]}

Napiorkowski, P. J. ^{[4
]}

Pakarinen, J. ^{[2
]}

Petts, A. ^{[11
]}

Reiter, P. ^{[9
]}

Renstrom, T. ^{[6
]}

Seidlitz, M. ^{[9
]}

Siebeck, B. ^{[9
]}

Siem, S. ^{[6
]}

Sotty, C. ^{[14
]}

Srebrny, J. ^{[4
]}

Stefanescu, I. ^{[10
]}

Tveten, G. M. ^{[2
,6
]}

Van de Walle, J. ^{[2
]}

Vermeulen, M. ^{[7
]}

Voulot, D. ^{[2
]}

Warr, N. ^{[9
]}

Wenander, F. ^{[2
]}

Wiens, A. ^{[9
]}

De Witte, H. ^{[10
]}

机构：

[1] CEA, GANIL, CNRS, DRF,IN2P3, F-14076 Caen 05, France

[2] CERN, PH Dept, CH-1211 Geneva 23, Switzerland

[3] Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France

[4] Univ Warsaw, Heavy Ion Lab, PL-02093 Warsaw, Poland

[5] CEA, DAM, DIF, F-91297 Arpajon, France

[6] Univ Oslo, Dept Phys, N-0316 Oslo, Norway

[7] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

[8] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

[9] Univ Cologne, Inst Nucl Phys, D-50397 Cologne, Germany

[10] Katholieke Univ Leuven, Inst Kern & Stralingsfys, Celestijnenlaan 200D, B-3001 Leuven, Belgium

[11] Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England

[12] Lund Univ, Phys Dept, Box 118, SE-22100 Lund, Sweden

[13] Univ Manchester, Dept Phys, Manchester M13 9PL, Lancs, England

[14] Univ Paris Saclay, Univ Paris Sud, CSNSM, CNRS,IN2P3, F-91405 Orsay, France

[15] Ludwig Maximilians Univ Munchen, Fak Phys, D-85740 Garching, Germany

来源：

PHYSICAL REVIEW C | 2016年 / 94卷 / 05期

基金：

欧洲研究理事会; 瑞典研究理事会;

关键词：

GROUND-STATE PROPERTIES; NEUTRON-RICH NUCLEI; MEAN-FIELD THEORY; SHAPE COEXISTENCE; MO ISOTOPES; LIFETIME MEASUREMENTS; FISSION FRAGMENTS; ATOMIC-NUCLEI; SHELL-MODEL; DEFORMATION;

D O I：

10.1103/PhysRevC.94.054326

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 structure of neutron-rich Sr-96,Sr-98 nuclei was investigated by low-energy safe Coulomb excitation of radioactive beams at the REX-ISOLDE facility, CERN, with the MINIBALL spectrometer. A rich set of transitional and diagonal E2 matrix elements, including those for non-yrast structures, has been extracted from the differential Coulomb-excitation cross sections. The results support the scenario of a shape transition at N = 60, giving rise to the coexistence of a highly deformed prolate and a spherical configuration in Sr-98, and are compared to predictions from several theoretical calculations. The experimental data suggest a significant contribution of the triaxal degree of freedom in the ground state of both isotopes. In addition, experimental information on low-lying states in Rb-98 has been obtained.

引用

页数：17

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