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High Spin Band Structure in 112Ru |
| CHE Xing-Lai1;ZHU Sheng-Jiang1;J. H. Hamilton2;A. V. Ramayya2;J. K. Hwang2;J. O. Rasmussen3;Y. X. Luo2,3;CHEN Yong-Jing1;LI Ming-Liang1;DING Huai-Bo1;U Yong-Nam1;I. Y. Lee3;W. C. Ma4 |
| 1Department of Physics, Tsinghua University, Beijing 100084
2Department of Physics, Vanderbilt University, Nashville, Tennessee 37235, USA
3Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
4Department of Physics, Mississippi State University, Mississippi 39762, USA |
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| Cite this article: |
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CHE Xing-Lai, ZHU Sheng-Jiang, J. H. Hamilton et al 2006 Chin. Phys. Lett. 23 328-331 |
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Abstract Levels in the neutron-rich 112Ru nucleus have been investigated by observing prompt gamma-rays from the spontaneous fission of 252Cf with the Gammasphere detector array. The ground-state band and the one-phonon g-vibrational band have been confirmed and extended with spin up to 16ħ and 15ħ, respectively. The other two side bands, one proposed as two-phonon g-vibrational band and the other proposed as two-quasiparticle band, have been observed for the first time. The total-Routhian-surface calculations show that rotational 112Ru nucleus has triaxial deformation with parameters β2～0.27 and γ=-29 °. The observed band crossing in the yrast band is due to the alignment of a pair of h11/2 neutrons according to the cranked shell model calculations. The possible configuration for the quasiparticle band has also been discussed.
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| Keywords:
21.10.Re
21.60.Ev
27.60.+j
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Published: 01 February 2006
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