Chinese Physics C > 2006, Vol. 30 > Issue(S2): 154-156

High Spin Band Structure in¹¹²Ru

Department of Physics, Tsinghua University, Beijing 100084, China2 Department of Physics, Vanderbilt University, Nashville, Tennessee 37235, USA3 Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

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Abstract：
Through measuring high-fold prompt γ-ray coincidence events following the spontaneous fission of ²⁵²Cf with the Gammasphere detector array, new level scheme in the very neutron-rich ¹¹²Ru nucleus has been established.The ground-state band and the one-phonon γ-vibrational band have been confirmed and extended with spin up to 16h and 15h, respectively. The other two side bands, one proposed as two-phonon γ-vibrational band and another proposed as two-quasiparticle band, have been identified for the first time. From cranked shell model calculations, ¹¹²Ru nucleus may have triaxial deformation with parameters β ₂～0.27, γ～－29° and the band crossing in the yrast band is due to the alignment of two h _11/2neutrons. The characteristics for the quasiparticle band and γ-vibrational bands have also been discussed.

References

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CHE Xing-Lai, ZHU Sheng-Jiang, CHEN Yong-Jing, DING Huai-Bo and LI Ming-Liang. High Spin Band Structure in ¹¹²Ru[J]. Chinese Physics C, 2006, 30(S2): 154-156.

CHE Xing-Lai, ZHU Sheng-Jiang, CHEN Yong-Jing, DING Huai-Bo and LI Ming-Liang. High Spin Band Structure in ¹¹²Ru[J]. Chinese Physics C, 2006, 30(S2): 154-156. shu

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Received: 2006-10-16
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

High Spin Band Structure in¹¹²Ru

Corresponding author:CHE Xing-Lai,

Department of Physics, Tsinghua University, Beijing 100084, China2 Department of Physics, Vanderbilt University, Nashville, Tennessee 37235, USA3 Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

Received Date:2006-10-16
Accepted Date:1900-01-01
Available Online:2006-01-03

Abstract:Through measuring high-fold prompt γ-ray coincidence events following the spontaneous fission of²⁵²Cf with the Gammasphere detector array, new level scheme in the very neutron-rich¹¹²Ru nucleus has been established.The ground-state band and the one-phonon γ-vibrational band have been confirmed and extended with spin up to 16h and 15h, respectively. The other two side bands, one proposed as two-phonon γ-vibrational band and another proposed as two-quasiparticle band, have been identified for the first time. From cranked shell model calculations,¹¹²Ru nucleus may have triaxial deformation with parameters β₂～0.27, γ～－29° and the band crossing in the yrast band is due to the alignment of two h_11/2neutrons. The characteristics for the quasiparticle band and γ-vibrational bands have also been discussed.