High-spin level structure of 115Rh: Evolution of triaxiality in odd-even Rh isotopes

被引：9

作者：

Liu, S. H. ^{[1
,2
]}

Hamilton, J. H. ^{[1
]}

Ramayya, A. V. ^{[1
]}

Gelberg, A. ^{[3
]}

Gu, L. ^{[4
]}

Yeoh, E. Y. ^{[4
]}

Zhu, S. J. ^{[4
]}

Brewer, N. T. ^{[1
]}

Hwang, J. K. ^{[1
]}

Luo, Y. X. ^{[1
,5
]}

Rasmussen, J. O. ^{[5
]}

Ma, W. C. ^{[6
]}

Daniel, A. V. ^{[1
,7
]}

Oganessian, Yu Ts ^{[7
]}

Ter-Akopian, G. M. ^{[7
]}

机构：

[1] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA

[2] UNIRIB Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA

[3] Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany

[4] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

[5] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[6] Mississippi State Univ, Dept Phys & Astron, Mississippi State, MS 39762 USA

[7] Joint Inst Nucl Res, RU-141980 Dubna, Russia

来源：

PHYSICAL REVIEW C | 2011年 / 84卷 / 01期

基金：

中国国家自然科学基金;

关键词：

NEUTRON-RICH; SPONTANEOUS FISSION; STATES; DECAY; SPECTROSCOPY; DEFORMATION; EXCITATIONS; MOMENTS; BANDS; XE;

D O I：

10.1103/PhysRevC.84.014304

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：

High-spin excited states in the neutron-rich nucleus Rh-115 have been identified for the first time by studying prompt gamma rays from the spontaneous fission of Cf-252 with the Gammasphere detector array. A new yrast band and a sideband are built in Rh-115. This level scheme is proposed to be built on the 7/2(+) ground state. The existence of a large signature splitting and an yrare band in Rh-115 shows typical features of a triaxially deformed nucleus. The rigid triaxial rotor plus particle model is used to interpret the level structure of Rh-115. The level energies, the gamma branching ratios, the large signature splitting in the yrast band, and the inverted signature splitting in the yrare band in Rh-115 are reproduced very well. Strong K mixing occurs in Rh-115 at high spin.

引用

页数：9

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