铪的新同位素:^(186)Hf  

A New Isotope of Hafnium: ^(186)Hf

作　　者：何建军[1] 袁双贵[1] 杨维凡[1] 李宗伟[1] 马桃桃[1] 方克明[1] 沈水法[1] 甘再国[1] 潘强岩[1] 陈展图[1] 郭天瑞[1] 牟万统[1] 苏登贵 徐岩冰[1] 郭俊胜 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,兰州730000

出　　处：《高能物理与核物理》1998年第12期1057-1060,共4页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金!19775055;中国科学院资助

摘　　要：利用兰州重离子加速器提供的60MeV／u的（18）O离子束轰击天然钨靶，通过奇异的多核子转移反应生成（186）Hf．采用快速放射化学分离技术从钨及反应产物的混合物中分离出铪，由高纯锗（HPGe）探测器测量样品的γ活性，观测到了（186）Hf的子体（186）Taγ活性的生长、衰变行为．由此表明：本实验首次合成并鉴别了重丰中子新核素（186）Hf，并测定它的半衰期为（2．6±1．2）min．60MeV /u(18)O ion beam delivered by the Heavy Ion Research Facility in Lanzhou (HIRFL) bombarded the natural tungsten targets. The (186)Hf was produced by multinucleon transfer reacions. The hafnium fraction was separated radiochemically from the mixture of tungsten and the reaction products. The γ activity was measured with a HPGe detector. The growth and decay of (186)Ta γ-rays has been observed, which indicates the （186）Hf as a parent of （186）Ta were produced. The half-life of （186）Hf has been determined to be (2.6±1.2)min.

关 键 词：厚靶 放射化学分离 衰变 铪186 同位素 

分 类 号：O614.413[理学—无机化学]