β-delayed fission of 228Ac

被引：0
|
作者：
Yuan Shuang-Gui [1 ]
Xu Yan-Bing [1 ]
Ding Hua-Jie [1 ]
Yang Wei-Fan [1 ]
Niu Yan-Ning [1 ]
Xiao Yong-Hou [1 ]
机构：
[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
来源：
CHINESE PHYSICS C | 2008年 / 32卷
基金：
美国国家科学基金会;
关键词：
Ac-228; beta-delayed fission; radiochemical separation; mica fission track detector;
D O I：
暂无
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The basic process of an exotic decay mode namely P-delayed fission is simply introduced. The progress status of the study in the world is essentialized. The observation of P-delayed fission of Ac-228 is reported. The radium was radiochemically separated from natural thorium. Thin Ra sources in which Ac-228 was got through Ra-228 ->(beta-) Ac-228 were prepared for observing fission fragments from beta-delayed fission Ac-228. They exposed to the mica fission track detectors, and measured by an HPGe gamma-ray detector. The beta-delayed fission events of Ac-228 were observed and its beta-delayed fission probability was found to be (5 +/- 2) x 10(-12).
引用
收藏
页码：53 / 55
页数：3
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