^(143)Dy和^(141)Dy的β缓发质子衰变与自旋指认  

β-delayed Proton Decays and Spin Assignments of ^(143)Dy and ^(141)Dy

作　　者：徐树威[1] 谢元祥[1] 许甫荣[2] 刘红亮[2] 

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]北京大学技术物理系,北京100871

出　　处：《科学技术与工程》2006年第14期2012-2015,共4页Science Technology and Engineering

基　　金：国家自然科学基金(10375078;10475002)资助

摘　　要：分析了143Dy和141Dy的β缓发质子衰变的数据,对比计算了这两种核的核位能面。从中看到了143Dy的衰变包括有1/2+基态和11/2-同核异能态的两种衰变成分,并且确定了它们的半衰期分别为(6.0±1.5)s和(3.0±0.5)s。同时也测定了141Dy的半衰期为(0.9±0.2)s,并指认了它的自旋宇称为9/2-。The experimental data for the β-delayed proton decays of ^143Dy and ^141Dy have been analyzed and the nuclear potential energy surfaces for the two nuclei have been calculated. It has been found that the decay of ^143Dy consists of two components, i. e. the decays from 1/2^＋ ground state and 1 1/2^- isomeric state with the halflives of （6.0±1.5） s and （3.0±0.5） s, respectively. In addition, the half-life of ^141Dy has been measured to be （0.9±0.2） s, and its spin and parity have been assigned as 9/2-.

关 键 词：Β缓发质子衰变 半衰期 自旋和宇称 

分 类 号：O571.22[理学—粒子物理与原子核物理]