摘要
搜索了２３０Ａｃβ延发裂变．由 ６０ＭｅＶ／ｕ１８Ｏ离子照射２３２Ｔｈ，通过多核子转移反应产生２３０Ｒａ．经放射化学分离和薄的２３０Ｒａ→β－２３０Ａｃ源的制备，获得了 １０８ 个２３０Ａｃ原子．该源对云母裂变径迹探测器曝光．借助于所测的γ能谱和两个裂变事件，鉴别了β延发裂变核２３０Ａｃ，得到了它的β延发裂变几率为（１． １９± ０．８５）× １０－８．
β-delayed fission for 230Ac was searched. 230 Ra was produced via multinucleon transfer reaction by 60 MeV/u18O ion irradiation of 232Th target. Thin230Ra→β-230Ac sources of 108 atoms were acquired through radiochemical separations. The mica track detectors were used to record the fission events. The β-delayed fission nucleus 230Ac was identified via the observed two fission events and the measured γ-ray spectra. Its β-delayed fission probability was obtained to be (1. 19 ± 0. 85) × 10-8.
出处
《高能物理与核物理》
EI
CSCD
北大核心
2000年第12期1191-1193,共3页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金(19775055)
国家重点基础研究发展规划(G2000077400)
中国科学院支持
关键词
β延发裂变几率
多核子转移反应
放射化学分离
β-delayed fission probability
multinucleon transfer reaction
radiochemical separation
