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新重丰中子同位素²³⁹Pa

A New Heavy Neutron-Rich Isotope ￣(239)Pa

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【作者】杨维凡；袁双贵；牟万统；张学谦；李宗伟；于暹；甘再国；刘洪业；郭应祥；赵进华；雷相国；郭俊盛；杜一飞；赵莉莉；张翔；

【Author】 Yang Weifan; Yuan Shuanggui; Mou Wantong; Zhang Xueqian;Li Zongwei; Yu Xian; Gan Zaiguo; Liu Hongye; Guo Yingxiang;Zhao Jinhua; Lei Xiangguo; Guo Junsheng;Du Yifei; Zhao Lili; Zhang Xiang (Institute of Modern Physics, The Chinese Academy of Sciences Lanzh

【机构】中国科学院近代物理研究所；

【摘要】用５０ＭｅＶ／ｕ１８Ｏ离子同天然铀靶反应产生了新重丰中子同位素２３９Ｐａ．用放射化学法从反应产物中分离Ｐａ活性，通过观测２３９Ｐａ及子体２３９Ｕ衰变所得到的结果显示：首次合成和鉴别了新重丰中子核素２３９Ｐａ，并测定出２３９Ｐａ的半衰期为１０６±３０ｍｉｎ．更多还原

【Abstract】 A new heavy neutron-rich isotope (239)Pa has been observed for the. first time in the interaction of 50MeV/u (18)O with (nat)U targets. Protactinium products were separated radiochemically from the complex mixture of the reaction products. The results observed from the decay of (239)Pa and its daughter (239)U show that a new heavy neutron-rich isotope (239)Pa was produced and identified. The measured half-life is 106±30 min.更多还原