新丰中子同位素:^(186)Hf  

A New Neu tron-rich Isotope:186Hf.

作　　者：杨维凡[1] 袁双贵[1] 李宗伟[1] 何建军[1] 马桃桃[1] 方克明[1] 沈水法[1] 甘再国[1] 潘强岩[1] 牟万统[1] 苏登贵 陈展图[1] 郭天瑞[1] 郭俊盛[1] 刘洪业[1] 石立军[1] 赵之正[1] 马惠芳[1] 

机构地区：[1]中国科学院近代物理研究所

出　　处：《高能物理与核物理》1997年第10期958-959,共2页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金;中国科学院资助

摘　　要：在兰州重离子加速器（ＦＤＵＬ）上，用６０ＭｅＶ／μ１８Ｏ离子轰击厚天然钨靶，通过多核子转移反应产生１８６Ｈｆ。使用放射化学分离技术从钨和反应产物混和物中分离出铪，并由ＨＰＧｅ探测器测量铪样品的活性．观测到了１８６Ｈｆ的子体１８６Ｔａ的７３７，５ｋｅＶＹ射线的增长、衰变行为，结果表明，本实验首次合成并鉴别了新丰中子同位素１８６Ｈｆ，测得它的半衰期为（２．６±１．２）ｍｉｎ。The radioactive nuclide 186Hf has been produced via multinucleon transfer reaction by 60 MeV / u 18 O ion irradiation of the natural tungsten. The radiochemical separation was performed to isolate the hafnium from tungsten and the complex mixture of the reaction products. The activity of the hafnium was measured using a HPGe detector The new neutron-rich isotope 186Hf has been identified for the first time by measuring the growth and decay of the 737.5keV - ray from its daughter 186Ta. The half-life of186Hf was determined to be (2.6±1.2) min.

关 键 词：多核子转移反应 衰变 丰中子同位素 铪186 

分 类 号：O571.34[理学—粒子物理与原子核物理]