Properties of the rotational bands in {sup 161}Er

Journal Article · Tue Mar 15 04:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.034318· OSTI ID:21499487

Chen, L; Zhou, X H; Wang, S T; Zhang, N T; Zhou, H B; Li, G S; Wang, H X; Ding, B ^[1]; Zhang, Y H; Zheng, Y; Liu, M L; Ma, F; Fang, Y D; Hua, W; Guo, S; Qiang, Y H; Lei, X G; Guo, Y X ^[1]; Zhu, L H; Wu, X G ^[2]

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1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China)
2. China Institute of Atomic Energy, Beijing 102413 (China)

High-spin states in {sup 161}Er have been studied experimentally using the {sup 150}Nd({sup 16}O,5n) reaction at a beam energy of 86 MeV. The 5/2{sup +}[642], 3/2{sup -}[521], and 11/2{sup -}[505] bands are extended up to high-spin states, and particularly the {alpha}=-1/2 branch of the ground state 3/2{sup -}[521] band is revised significantly. The relatively enhanced E1 transitions from the 3/2{sup -}[521] band to the 5/2{sup +}[642] band are observed. The band properties are analyzed within the framework of a triaxial particle-rotor model, and near-prolate shape and triaxial deformation are proposed to the 3/2{sup -}[521] and 5/2{sup +}[642] bands, respectively. Signature inversion occurs in the 3/2{sup -}[521] band after the band crossing in {sup 161}Er, and the systematics of the signature inversion associated with the 3/2{sup -}[521] configuration are discussed. By analyzing the properties of the relatively enhanced E1 transitions, it is found that the R(E1/E2) values show angular momentum dependence before the band crossing, and these enhanced E1 transitions could be attributed to octupole softness.

• OSTI ID: 21499487
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 83; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BEAMS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CONFIGURATION
DEFORMATION
E1-TRANSITIONS
E2-TRANSITIONS
ELECTRON CAPTURE RADIOISOTOPES
EMISSION
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
ERBIUM 161
ERBIUM ISOTOPES
EVEN-ODD NUCLEI
EXCITED STATES
HEAVY ION REACTIONS
HIGH SPIN STATES
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
MULTIPOLE TRANSITIONS
MULTIPOLES
NEODYMIUM 150 TARGET
NEUTRON EMISSION
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
OCTUPOLES
OXYGEN 16 REACTIONS
PARTICLE-CORE COUPLING MODEL
RADIOISOTOPES
RARE EARTH NUCLEI
ROTATIONAL STATES
TARGETS