Chin. Phys. Lett.  2012, Vol. 29 Issue (9): 092301    DOI: 10.1088/0256-307X/29/9/092301
NUCLEAR PHYSICS |
Near-Yrast Structures in Odd-Odd 122I Nucleus
LIU Gong-Ye1, LI Li1, LI Xian-Feng1, YU De-Yang1, SUN Ji1, LI Cong-Bo1, MA Ying-Jun1**, WU Xiao-Guang2, HE Chuang-Ye2, ZHENG Yun2, ZHU Li-Hua3, ZHAO Yan-Xin4
1College of Physics, Jilin University, Changchun 130012
2China Institute of Atomic Energy, Beijing 102413
3School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191
4Department of Physics, Heilongjiang University, Haerbin 150080
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LIU Gong-Ye, LI Li, LI Xian-Feng et al  2012 Chin. Phys. Lett. 29 092301
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Abstract Excited states of the odd-odd nucleus 122I are investigated via the fusion-evaporation reaction 116Cd(11B,5n) at a beam energy of 68 MeV. The two most strongly populated bands in 122I are observed up to excitation energies around 10.5 MeV. Their possible configurations at lower spins are assigned to πh11/2?νh11/2 and πh11/2?νd5/2 based on the observed population, B(M1)/B(E2) values, alignments and signature splitting. E1 transitions are observed connecting the πh11/2?νd5/2 band to the πh11/2?νh11/2 band, which may be evidence of octupole collectivity. Band terminations caused by the full alignment of the valence nucleons outside the 114Sn core are observed in both bands.
Received: 16 April 2012      Published: 01 October 2012
PACS:  23.20.Lv (γ-transitions and level energies)  
  21.10.-k (Properties of nuclei; nuclear energy levels)  
  21.10.Re (Collective levels)  
  27.60.+j (90 ≤ A ≤ 149)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/29/9/092301       OR      https://cpl.iphy.ac.cn/Y2012/V29/I9/092301
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LIU Gong-Ye
LI Li
LI Xian-Feng
YU De-Yang
SUN Ji
LI Cong-Bo
MA Ying-Jun
WU Xiao-Guang
HE Chuang-Ye
ZHENG Yun
ZHU Li-Hua
ZHAO Yan-Xin
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