β-delayed fission of 228Ac

摘要：

The basic process of an exotic decay mode namely β-delayed fission is simply introduced.The progress status of the study in the world is essentialized.The observation of β-delayed fission of 228Ac is reported.The radium was radiochemically separated from natural thorium.Thin Ra sources in which 228Ac was got through 228Ra→β- 228Ac were prepared for observing fission fragments from β-delayed fission of 228Ac.They exposed to the mica fission track detectors,and measured by an HPGe γ-ray detector.The β-delayed fission events of 228Ac were observed and its β-delayed fission probability was found to be (5±2)×10-12.

关键词： 228Ac β-delayed fission radiochemical separation mica fission track detector

作者: YUAN Shuang-Gui(袁双贵) XU Yan-Bing(徐岩冰) DING Hua-Jie(丁华杰) YANG Wei-Fan(杨维凡) NIU Yan-Ning(牛雁宁) XIhO Yong-Hou(肖永厚)

作者单位: Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China

会议类型: 国际会议

会议名称: The 13th National Nuclear Physics Conference of China(第十三届全国核物理大会暨第八届会员代表大会)

会议地点: 兰州

会议语种:英文

页码: 53-55

在线出版日期: 2007-08-22（万方平台首次上网日期，不代表论文的发表时间）