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²⁶⁶Bh的α衰变性质研究（英文）

Alpha-decay Properties of ²⁶⁶Bh

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【作者】秦芝；吴晓蕾；丁华杰；吴王锁；黄文学；雷祥国；徐岩冰；袁晓华；郭斌；杨维凡；甘再国；范红梅；郭俊盛；徐瑚珊；肖国青；

【Author】 QIN Zhi~1,WU Xiao-lei~1,DING Hua-jie~1,WU Wang-suo~2,HUANG Wen-xue~1,LEI Xiang-guo~1,XU Yan-bing~1,YUAN Xiao-hua~1,GUO Bin~1,YANG Wei-fan~1,GAN Zai-guo~1,FAN Hong-mei~1,GUO Jun-sheng~1,XU Hu-shan~1,XIAO Guo-qing~1(1 Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;2 College of Chemical Engineering,Lanzhou University,Lanzhou 730000,China)

【机构】中国科学院近代物理研究所；兰州大学化学化工学院；中国科学院近代物理研究所甘肃兰州730000；甘肃兰州730000；

【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。更多还原

【Abstract】 The isotope of ²⁶⁶Bh 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 for ²⁶⁶Bh observed in the first chain of element 113 at RIKEN.The half-life of ²⁶⁶Bh is 0.66⁺0.59_-0.26 s.The Q_α value derived from this experiment fits well into the general trend in a "Q_αN systematics" for the isotopes with Z = 107.更多还原