新重丰中子同位素^（239）Pa  

A New Heavy Neutron-Rich Isotope ￣(239)Pa

作　　者：杨维凡[1] 袁双贵[1] 牟万统[1] 张学谦[1] 李宗伟[1] 于暹 甘再国[1] 刘洪业[1] 郭应祥[1] 赵进华[1] 雷相国[1] 郭俊盛[1] 杜一飞[1] 赵莉莉[1] 张翔[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》1995年第5期479-480,共2页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金;中国科学院八.五重大项目

摘　　要：用５０ＭｅＶ／ｕ１８Ｏ离子同天然铀靶反应产生了新重丰中子同位素２３９Ｐａ．用放射化学法从反应产物中分离Ｐａ活性，通过观测２３９Ｐａ及子体２３９Ｕ衰变所得到的结果显示：首次合成和鉴别了新重丰中子核素２３９Ｐａ，并测定出２３９Ｐａ的半衰期为１０６±３０ｍｉｎ．A new heavy neutron-rich isotope (239)Pa has been observed for the. first time in the interaction of 50MeV/u (18)O with (nat)U targets. Protactinium products were separated radiochemically from the complex mixture of the reaction products. The results observed from the decay of (239)Pa and its daughter (239)U show that a new heavy neutron-rich isotope (239)Pa was produced and identified. The measured half-life is 106±30 min.

关 键 词：同位素 镤239 重丰中子 

分 类 号：O614.52[理学—无机化学]