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
The total reaction cross section (1724±93 mb) of 17B at the energy of 43.7 A MeV on C target has been measured by using the transmission method at the Radioactive Ion Beam Line in Lanzhou (RIBLL). Assuming 17B consists of a core 15B plus two halo neutrons,the total cross section of 17B on C target was calculated with the zero-range Glauber model,where double Gaussian density distributions and Gaussian plus HO density distributions were used. It can fit the experimental data very well. The characteristic of halo structure for 17B was found with a large diffusion of the neutrons density distribution.
HU ZhengGuo1, WANG Meng1, XU HuShan1, SUN ZhiYu1, WANG JianSong1, XIAO GuoQing1, ZHAN WenLong1, XIAO ZhiGang1, MAO RuiShi1,2, LI Chen1, ZHANG XueYing1,2, ZHANG HongBin1, ZHAO TieCheng1, XU ZhiGuo1, WANG Yue1,2, CHEN RuoFu1,2, HUANG TianHeng1,2, FU Fen1,2, GAO Qi1,2, HAN JianLong1,2, ZHANG XueHeng1,2, ZHENG Chuan1,2, YU YuHong1,2 & GUO ZhongYan1 1 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
The configuration-fixed deformation constrained relativistic mean field approach with time-odd component has been applied to investigate the ground state properties of 33Mg with effective interaction PK1.The ground state of 33Mg has been found to be prolate deformed,β2=0.23,with the odd neutron in 1/2[330] orbital and the energy -251.85 MeV which is close to the data -252.06 MeV.The magnetic moment -0.9134 μN is obtained with the effective electromagnetic current which well reproduces the data -0.7456 μN self-consistently without introducing any parameter.The energy splittings of time reversal conjugate states,the neutron current,the energy contribution from the nuclear magnetic potential,and the effect of core polarization are discussed in detail.
LI Jian1,ZHANG Ying1,YAO JiangMing1 & MENG Jie1,2 1 School of Physics,State Key Laboratory of Nuclear Physics and Technology,Peking University,Beijing 100871,China
The research activities at HIRFL cover the fields of radio-biology,material science,atomic physics,and nuclear physics. This report mainly concentrates on the experiments of nu-clear physics with the existing and planned experimental setups such as SHANS,RIBLL1,ETF,CSRe and PISA at HIRFL.
XU Hu-shan (Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China)
The LPT (Lanzhou Penning Trap) is under construction and its task is to perform direct mass measurement of fusion-evaporation residues and if possible for heavy isotopes. Detailed simulations have been done for a good understanding to the ion’s movement and mechanics in the trap. The optimization of the LPT is also performed based on the simulation. With a scale of 0.5 mm per grid used in the simulation and many other limitations a highest mass resolution has been achieved to be 1.9×10-5. An unexpected behaviour in the simulation related to magnetron motion has been found.
