^(146)Tb的能级结构研究  

Study of Level Structure in ^(146)Tb

作　　者：谢成营[1] 周小红[1] 郑勇[1] 张玉虎[1] 刘忠[1] 潘强岩[1] 甘再国[1] T.Hayakawa M.Oshima T.Toh T.Shizuma J.Katakura Y.Hatsukawa M.Matsuda H.Kusakari M.Sugawara 

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]Japan Atomic Energy Research Institute,Tokai,Ibaraki 319-1195,Japan [3]Chiba University,Inage-ku,Chiba 263-8512,Japan [4]Chiba Institute of Technology,Narashino,Chiba 275-0023,Japan

出　　处：《高能物理与核物理》2003年第10期884-887,共4页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金(10005012;10025525);国家重点基础研究发展规划项目(TG2000077400)资助~~

摘　　要：利用能量为161—175MeV的^(32)S束流,通过反应^(118)Sn(^(32)S,1p3n)^(146)Tb研究了双奇核^(146)Tb的高自旋态能级结构。实验进行了γ射线的激发函数、γ射线的各向异性度、X-γ和γ-γ-t符合测量。基于这些测量结果,建立了激发能达8390kev的^(146)Tb核的能级纲图,其中包括新发现的41条γ射线和新建立的27个能级,并指定了^(146)Tb新发现能级的自旋值。用一个h_(11/2)价质子和一个h_(11/2)^(-1)价中子空穴耦合、πh_(11/2)υh_(11/2)^(-1)与^(146)Gd核实激发态的耦合对^(146)Tb的能级结构进行了定性地讨论。The level structure of high-spin states of doubly odd nucleus l46Tb has been studied via the 118Sn (32S, 1p3n) Tb reaction using techniques of in-beam y-ray spectroscopy. Measurements of r-ray excitation functions, y-ray anisotropies, X-r and r-r-t coincidences were performed with 12 BGO(AC)HPGe detectors. Based on the gated spectra, r-r coincidence relationships, intensity balances and cross-over transitions, the level scheme in Tb has been extended up to an excitation energy of 8390 keV, and 41 new 7-rays are added into the level scheme. The spins for the new established levels have been assigned according to the results of the measured 7-ray anisotropies. The levels in Tb are interpreted qualitatively by coupling a h11/2 proton to a h11/2 neutron hole and h11/2 u h11/2 -1 to the excited states in 146Gd core.

关 键 词：在束Γ谱学 高自旋态 能级纲图 ^146Tb 能级结构 双奇核 原子核结构 

分 类 号：O571[理学—粒子物理与原子核物理]