New insight into the shape coexistence and shape evolution of {sup 157}Yb

Journal Article · Sat Jan 15 04:00:00 EST 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.014318· OSTI ID:21499340

Xu, C; Hua, H; Li, X Q; Meng, J; Li, Z H; Xu, F R; Shi, Y; Liu, H L; Zhang, S Q; Ye, Y L; Jiang, D X; Zheng, T; Lou, J L; Ma, L Y; Wang, E H; Cheng, Y Y; He, C ^[1]; Li, Z Y ^[2]; Zhu, L H; Wu, X G ^[3]

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1. School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)
2. College of Nuclear Science and Technology, Harbin Engineering University, Harbin 150001 (China)
3. China Institute of Atomic Energy, Beijing 102413 (China)

High-spin states in {sup 157}Yb have been populated in the {sup 144}Sm({sup 16}O,3n){sup 157}Yb fusion-evaporation reaction at a beam energy of 85 MeV. Two rotational bands built on the {nu}f{sub 7/2} and {nu}h{sub 9/2} intrinsic states, respectively, have been established for the first time. The newly observed {nu}f{sub 7/2} band and previously known {nu}i{sub 13/2} band in {sup 157}Yb 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 {sup 157}Yb provide evidence for shape coexistence of three distinct shapes: prolate, triaxial, and oblate. At higher spins, both the {nu}f{sub 7/2} band and {nu}i{sub 13/2} band in {sup 157}Yb undergo a shape evolution with sizable alignments occurring.

• OSTI ID: 21499340
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 83; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY RADIOISOTOPES
ANGULAR MOMENTUM
BEAMS
BETA DECAY RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
EMISSION
ENERGY LEVELS
ENERGY RANGE
EVEN-ODD NUCLEI
EVOLUTION
EXCITED STATES
HEAVY ION REACTIONS
HIGH SPIN STATES
INTERMEDIATE MASS NUCLEI
ISOTONIC NUCLEI
ISOTOPES
MEV RANGE
MEV RANGE 10-100
NEUTRON EMISSION
NUCLEAR REACTIONS
NUCLEI
OXYGEN 16 REACTIONS
PARTICLE PROPERTIES
RADIOISOTOPES
RARE EARTH NUCLEI
ROTATIONAL STATES
SAMARIUM 144 TARGET
SECONDS LIVING RADIOISOTOPES
SPIN
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TARGETS
YTTERBIUM 157
YTTERBIUM ISOTOPES