Low-spin signature inversion has been systematically observed throughout the chart of nuclides in the πg9/2(■) vg9/2, πh11/2(■)vh11/2, πh11/2(■)vh13/2, and πh9/2(■) vi13/2, configurations. Considering the high-j nature of these configurations, we have tried to find the similar signature inversion phenomenon in the πi13/2 (■) vi13/2, bands
Zhang YuhuFang YongdeG. de AngelisN. MargineanA. GadeaD. R. NapoliM. AxiotisC. RusuT. MartinezZhou XiaohongWang HualeiGuo WentaoLiu MinliangLei XiangguoGuo Yingxiang
The high-spin states in 184Au were populated by using the 159Tb( 29Si, 4ng) 184Au reaction at a bombarding energy of 140 MeV. The 29Si beam of 8 pnA was provided by the accelerator complex of the Tandem-XTU and ALPI at the Laroratori Nazionale di Legnero, Italy, and focussed onto a natural metallic 159Tb foil
Zhang YuhuWang HualeiG. de AngelisN. MaigineanA. GadeaD. R. NapoliM. AxiotisC. R.usuT. MartinezZhou XiaohongFang YongdeGuo WentaoLiu MinliangLei XiangguoGuo Yingxiang
The high-spin states of 190Tl, populated via the 160Gd(35Cl, 5n)190Tl fusion-evaporation reaction at 167 and 175 MeV beam energies, have been investigated by in-beam γ-ray spectroscopy. Based on the experiment measured results, together with references to the previous in-beam work and the studies of the 194Bi αdecay, the level scheme of 190Tl has been established as shown in Fig.1. Spins for the levels above the 300 keV 10-state were proposed from the measured DCO and γ-ray anisotropy results. It is the first time that spin
Xie Chengying Zhou Xiaohong Zhang Yuhu Guo Yingxiang Lei Xiangguo Song Litao Wang Hualei Liu Minliang Zheng Yong Guo Wentao Yu Haiping Luo Peng Wen Shuxian Zhu Lihua Wu Xiaoguang
High-spin states in 190Tl have been studied via the 160Gd(35Cl, 5nγ) reaction. The level scheme, consisting of the π h9 /2 νi13/2 oblate band and a cascade with character of single particle excitations, has been established. Spin values have been firmly assigned to the oblate band in 190Tl, resulting in low-spin signature inversion in the π h9 /2 νi13/2 oblate band for the first time. Based on the similarity of the level structure in doubly odd Tl nuclei, spin values for the oblate bands in 192―200Tl should be re-assigned, and a consistent low-spin signature inversion has occurred in these oblate deformed nuclei. The low-spin signature inversion phenomena can be interpreted qualitatively by using the 2-quasiparticle plus rotor model including p-n residual interactions.
XIE Chengying1,2, ZHOU Xiaohong1,2, ZHANG Yuhu1, GUO Yingxiang1, LEI Xiangguo1, ZHENG Yong1, LIU Minliang1, SONG Litao1, WANG Hualei1, YU Haiping1, GUO Wentao 1, LUO Peng1, WU Zhijun1, ZHU Lihua3 & WU Xiaoguang3 ⒈ Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
