Half-life measurement of neutron-rich isotope^(237)Th  

作　　者：XUYan－Bing XIAOYong－Hou 等 

机构地区：[1]InstituteofModernPhysics,theChineseAcademyofScieneces,Lanzhou730000

出　　处：《Nuclear Science and Techniques》2001年第4期284-288,共5页核技术（英文）

基　　金：Supported by the National Natural Science Foundation of China (10075063), Major State Basic Research Development Program (G20000

摘　　要：MeV/u 18O ions were used to bombard natural uranium targets, and the heavy neutron-rich isotope 237Th was produced via multi-nucleon transfer reaction and dissipative fragmentation of the heavy target. A relatively fast radiochemical procedure was used to separate thorium from the mixture of uranium and complex reaction products. The chemically separated thorium fractions were studied by the 7-ray spectroscopic method. The behaviors of the growth and decay of 853.7 and 865.0 keV-γrays of 237Pa decay were observed. The half-life of 237Th was determined to be 4.69±0.60 nun.MeV/u 18O ions were used to bombard natural uranium targets, and the heavy neutron-rich isotope 237Th was produced via multi-nucleon transfer reaction and dissipative fragmentation of the heavy target. A relatively fast radiochemical procedure was used to separate thorium from the mixture of uranium and complex reaction products. The chemically separated thorium fractions were studied by the 7-ray spectroscopic method. The behaviors of the growth and decay of 853.7 and 865.0 keV-γrays of 237Pa decay were observed. The half-life of 237Th was determined to be 4.69±0.60 nun.

关 键 词：^237Th 富中子同位素 半寿命测量 

分 类 号：O571.325[理学—粒子物理与原子核物理] TL275[理学—物理]