New insight into the shape coexistence and shape evolution of 157Yb

被引：8

作者：

Xu, C. ^{[1
,3
]}

Hua, H. ^{[1
,3
]}

Li, X. Q. ^{[1
,3
]}

Meng, J. ^{[1
,3
]}

Li, Z. H. ^{[1
,3
]}

Xu, F. R. ^{[1
,3
]}

Shi, Y. ^{[1
,3
]}

Liu, H. L. ^{[1
,3
]}

Zhang, S. Q. ^{[1
,3
]}

Li, Z. Y. ^{[2
]}

Zhu, L. H. ^{[4
]}

Wu, X. G. ^{[4
]}

Li, G. S. ^{[4
]}

He, C. Y. ^{[4
]}

Zhou, S. G. ^{[5
,6
]}

Wang, S. Y. ^{[7
]}

Ye, Y. L. ^{[1
,3
]}

Jiang, D. X. ^{[1
,3
]}

Zheng, T. ^{[1
,3
]}

Lou, J. L. ^{[1
,3
]}

Ma, L. Y. ^{[1
,3
]}

Wang, E. H. ^{[1
,3
]}

Cheng, Y. Y. ^{[1
,3
]}

He, C. ^{[1
,3
]}

机构：

[1] Peking Univ, Sch Phys, Beijing 100871, Peoples R China

[2] Harbin Engn Univ, Coll Nucl Sci & Technol, Harbin 150001, Peoples R China

[3] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China

[4] China Inst Atom Energy, Beijing 102413, Peoples R China

[5] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China

[6] Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China

[7] Shandong Univ, Dept Space Sci & Appl Phys, Weihai 264209, Peoples R China

来源：

PHYSICAL REVIEW C | 2011年 / 83卷 / 01期

关键词：

NUCLEI; IDENTIFICATION; BANDS;

D O I：

10.1103/PhysRevC.83.014318

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 states in Yb-157 have been populated in the Sm-144( O-16,3n)Yb-157 fusion-evaporation reaction at a beam energy of 85 MeV. Two rotational bands built on the nu f(7/2) and nu h(9/2) intrinsic states, respectively, have been established for the first time. The newly observed nu f(7/2) band and previously known nu i(13/2) band in Yb-157 are discussed in terms of total Routhian surface methods and compared with the structures in the neighboring N = 87 isotones. The structural characters observed in Yb-157 provide evidence for shape coexistence of three distinct shapes: prolate, triaxial, and oblate. At higher spins, both the nu f(7/2) band and nu i(13/2) band in Yb-157 undergo a shape evolution with sizable alignments occurring.

引用

页数：6

共 17 条

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