Yrast excitations in the neutron-rich N=52 isotones

被引：31

作者：

Czerwinski, M. ^{[1
]}

Razca-Urban, T. ^{[1
]}

Sieja, K. ^{[2
,3
]}

Sliwinska, H. ^{[2
,3
]}

Urban, W. ^{[1
,4
]}

Smith, A. G. ^{[5
]}

Smith, J. F. ^{[5
]}

Simpson, G. S. ^{[6
]}

Ahmad, I. ^{[7
]}

Greene, J. P. ^{[7
]}

Materna, T. ^{[8
]}

机构：

[1] Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland

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

[3] CNRS, UMR7178, F-67037 Strasbourg, France

[4] Inst Laue Langevin, F-38042 Grenoble 9, France

[5] Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, Lancs, England

[6] Univ Grenoble 1, LPSC, CNRS IN2P3, Inst Natl Polytech Grenoble, F-38026 Grenoble, France

[7] Argonne Natl Lab, Argonne, IL 60439 USA

[8] CEA Saclay, IRFU SPHN, F-91191 Gif Sur Yvette, France

来源：

PHYSICAL REVIEW C | 2013年 / 88卷 / 04期

关键词：

NUCLEAR-DATA SHEETS; SHELL-MODEL; SHAPE TRANSITION; LARGE ARRAYS; FISSION; STATES;

D O I：

10.1103/PhysRevC.88.044314

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 Kr-88 nucleus has been reinvestigated with prompt-gamma-ray-spectroscopy methods using the Gammasphere Ge array to measure gamma rays following spontaneous fission of Cf-252. The order of some of the transitions, reported previously, has been changed and new levels were introduced. Angular correlation analysis allowed the assignment of spins to several levels in Kr-88. These data, together with the shell-model calculations, explained the near-yrast structure of Kr-88, which is similar to the structure of the N = 52, Sr-90, and Zr-92 isotones. The regular systematics obtained for the three isotones suggests that the spin of the 2073.4-keV level in the Se-86 isotone is different from the I = 6 value reported previously. Using data from prompt gamma-ray measurement of spontaneous fission of Cm-248, we reinvestigated the 86Se nucleus. A new candidate for the 6(1)(+) level in Se-86 has been proposed, which is supported by shell-model calculations. Energies of the 2(1)(+) and 4(1)(+) levels in the Zn-82 nucleus have been predicted using a novel systematics.

引用

页数：13

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