CHE Xing-Lai1, ZHU Sheng-Jiang1, J. H. Hamilton2, A. V. Ramayya2, J. K. Hwang2, U Yong-Nam1, LI Ming-Liang1, ZHENG
Rang-Chen1, I. Y. Lee3, J. O. Rasmussen3, Y. X. Luo2,3, 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
3Department of Physics, Mississippi State University, Mississippi 39762, USA
High-Spin Structure in Neutron-Rich 108Ru Nucleus
CHE Xing-Lai1;ZHU Sheng-Jiang1;J. H. Hamilton2;A. V. Ramayya2;J. K. Hwang2;U Yong-Nam1;LI Ming-Liang1;ZHENG
Rang-Chen1;I. Y. Lee3;J. O. Rasmussen3;Y. X. Luo2,3;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
3Department of Physics, Mississippi State University, Mississippi 39762, USA
Abstract： High spin states in the neutron-rich 108Ru nucleus have been studied through measuring prompt γ-ray coincidences following the spontaneous fission of 252Cf with the Gammasphere detector array. The yrast band has been confirmed. The one-phonon γ-vibrational band and the two-quasiparticle band based on the 5- level have been extended up to 13+ and 15-, respectively. In addition, two levels at 1644.8keV and 1826.5keV excitation energies are newly identified and proposed to be the members of a two phonon γ-vibrational band. It is shown that the 108Ru nucleus has triaxial deformation with parameters β2～0.29 and γ=-22°from the total Routhian surface calculations. 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 two-quasiparticle band has been discussed.
CHE Xing-Lai;ZHU Sheng-Jiang;J. H. Hamilton;A. V. Ramayya;J. K. Hwang;U Yong-Nam;LI Ming-Liang;ZHENG
Rang-Chen;I. Y. Lee;J. O. Rasmussen;Y. X. Luo;W.C.Ma. High-Spin Structure in Neutron-Rich 108Ru Nucleus[J]. 中国物理快报, 2004, 21(10): 1904-1907.
CHE Xing-Lai, ZHU Sheng-Jiang, J. H. Hamilton, A. V. Ramayya, J. K. Hwang, U Yong-Nam, LI Ming-Liang, ZHENG
Rang-Chen, I. Y. Lee, J. O. Rasmussen, Y. X. Luo, W.C.Ma. High-Spin Structure in Neutron-Rich 108Ru Nucleus. Chin. Phys. Lett., 2004, 21(10): 1904-1907.
MA Long;ZHOU Xiao-Hong;XING Ye-Bing;ZHANG Yu-Hu;GUO Ying-Xing;LEI Xiang-Guo;XIE Chen-Ying;Oshima M.;Toh Y.;Koizumi M.;Osa A.;Hatsukawa Y.;Sugawara M.. Properties of the πh9/2 otimes νi13/2 Oblate Band in 188Tl[J]. 中国物理快报, 2006, 23(7): 1727-1730.
CHE Xing-Lai;ZHU Sheng-Jiang;J. H. Hamilton;A. V. Ramayya;J. K. Hwang;J. O. Rasmussen;Y. X. Luo;CHEN Yong-Jing;LI Ming-Liang;DING Huai-Bo;U Yong-Nam;I. Y. Lee;W. C. Ma. High Spin Band Structure in 112Ru[J]. 中国物理快报, 2006, 23(2): 328-331.
2004, Vol. 21 
