摘要
14MeV中子可以引起重核奇异的(n,2p)反应。中能较轻的重离子轰击重核,可以产生多核子转移反应,并以此为基础形成了我们合成和研究重丰中子新核素的一条物理思想和生成、分离鉴别技术路线。介绍了化学分离和X-γ符合方法(元素分离方法);先后合成了一些如185Hf、186Hf、237Th、238Th、239Pa、175Er和197Os等重丰中子新核素,并测定它们的半衰期分别为3.5min、2.6min、5.0min、9.4min、106min、2.8min和1.2min;还观测了它们其他的衰变性质,如新γ射线和衰变纲图等。
14- MeV neutrons could induce the exotic （n, 2p） reaction of heavy nuclear. The heary ion of kighter mass with intermediate energy bombardment of heavy nucleus could produce muhinuclear transfer reaction. The physics idea and technical route for production, separation, and identification in the synthesis and study of new heavy neutron-rich nuclides were formed based on the mentioned above. The radiochemical separation and X-γ coincidence methods （element separation method） are introduced. Some new heavy neutron-rich nuclides such as ^185Hf、^186Hf、^237Th、^238Th、^239Pa、^175Er and ^197Os were successively synthesized. Their half-life were determined to be 3.5 min, 2.6 min, 5.0 min, 9.4 min, 106 min, 2.8 min, and 1.2 min, respectively. And their other decay properties such as new ,/rays and partial decay scheme were observed.
出处
《科技导报》
CAS
CSCD
2006年第9期36-37,共2页
Science & Technology Review
基金
国家自然科学基金项目(10575118)
中国科学院优秀博士学位论文
院长奖获得者科研启动专项资金项目
关键词
奇异反应
元素分离
exotic reaction
element separation
