Ground-state bands of neutron-rich 236Th and 242U nuclei and implication of spherical shell closure at N = 164
Ground-state bands of neutron-rich 236Th and 242U nuclei and implication of spherical shell closure at N = 164
复制标题
富中子 236Th 和 242U 核的基态能带以及 N = 164 时球壳闭合的含义
DOI：
10.1103/physrevc.76.011303
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发表时间：
2007
影响因子：
3.1
通讯作者：
M. Ogawa
中科院分区：
文献类型：
--
作者：
T. Ishii;H. Makii;M. Asai;H. Koura;S. Shigematsu;K. Tsukada;A. Toyoshima;M. Matsuda;A. Makishima;J. Kaneko;H. Toume;I. Hossain;T. Shizuma;S. Ichikawa;T. Kohno;M. Ogawa
The ground-state bands of the neutron-rich 236 Th and 242 U nuclei were established up to spin 10 and 8, respectively, by in-beam γ-ray spectroscopy using the ( 18 O, 20 N*e) two-proton pickup reaction with a 238 U and a 244 Pu target. Deexcitation y rays in 236 Th and 242 U were identified by selecting the kinetic energies of 20 Ne using Si AE-E detectors. The excitation energies of the first 2 + states in U and Pu isotopes have local minima at N ≃ 146, suggesting the possibility that nuclei with Z ≃ 92 have a spherical shell closure of N = 164. Calculation using the Koura-Yamada single-particle potential gives an energy gap of 1.8 MeV at N = 164 for 256 U.
