^(207)Rn能级结构的实验研究  

Experimental Study of Level Structure in ^(207)Rn

作　　者：罗万居[1] 郭应祥[1] 周小红[1] 张玉虎[1] 雷相国[1] 刘忠[1] 何建军[1] 郑勇[1] 柳敏良[1] 竺礼华[2] 温书贤[2] 

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]中国原子能科学研究院,北京102413

出　　处：《高能物理与核物理》2003年第5期402-405,共4页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 ( 10 0 75 0 62 ) ;国家重点基础研究发展规划 (TG2 0 0 0 0 7740 0 )资助~~

摘　　要：利用能量为 85— 95MeV的1 6O束流 ,通过1 96Pt(1 6O ,5n) 2 0 7Rn反应布居了2 0 7Rn的高自旋态 .实验进行了γ射线的激发函数、γ射线的单谱、衰变谱和γ γ t符合测量 .建立了由 1 7条γ射线组成的2 0 7Rn能级纲图 ,并且基于实验测量的DCO系数建议了各能级的自旋值 .用一个f5 2 价中子空穴与2 0 8Rn核芯耦合定性地解释了2 0High spin states of 207 Rn have been investigated via the 196 Pt( 16 O,5n) 207 Rn reaction at 16 O energies from 85 to 95 MeV using techniques of in beam γ ray spectroscopy. The measurements of γ ray excitation fuction,γ ray spectra,γ γ t coincidences and decay γ ray spectra were performed with 10 BGO(AC)HPGe detectors.Based on these measurements,a level scheme of 207 Rn with 17 γ rays is established. The spins for most of the levels in the scheme are proposed according to the results of measured γ ray DCO ratios. Comparing the structure between 208 Rn and 207 Rn, the low lying levels in 207 Rn are interpreted by coupling a valence neutron hole (f 5/2 ) to the excited states in 208 Rn core.

关 键 词：能级结构 ^207Rn 实验研究 高自旋态 激发函数 γ射线 DC0系数 能级纲图 低位激发态 缺中子氡核 核芯耦合 

分 类 号：O571.2[理学—粒子物理与原子核物理]