摘要
报道了利用兰州重离子研究装置提供的26Mg重离子束流轰击243Am靶产生和鉴别已知超重核素266Bh的实验结果。利用转轮收集探测装置依靠母子核遗传关系通过观测Bh同位素与其子核Db和Lr之间的α-α关联事件来鉴别266Bh。实验中观测到266Bh的α能量为(9.03±0.08)MeV,与日本理化学研究所在合成113号元素中第一个衰变链中观测到266Bh的α能量为9.07 MeV相近。266Bh的半衰期为0.66+-00..5269s,从实验得到的Qα也符合Z=107的Qα随中子数变化的系统性。
The isotope of 266 Bh was produced and identified definitely in bombardments of 243Am target with 162 MeV 26Mg ions at HIRFL. Identification was made by observation of correlated α-particle decays between the Bh isotopes and their Db and Lr daughters using a rotating wheel system. The measured α energy for 266Bh is （9.03±0.08） MeV, and this value close to the 9.07 MeV 0.66＋0.53 -0.25S for . The Q. value derived from this experiment fits f. well into the general trend in a “Qo-N systematics”or the isotopeswith Z = 107.
出处
《原子核物理评论》
CAS
CSCD
北大核心
2006年第4期400-404,共5页
Nuclear Physics Review
基金
国家自然科学基金资助项目(10575122)~~
