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α-decay study of ²¹⁸Ac and ²²¹Th in ⁴⁰Ar+¹⁸⁶W reaction

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【作者】滑伟；张志远；马龙；甘再国；杨华彬；黄明辉；杨春莉；张明明；田玉林；周小红；袁岑溪；沈彩万；祝龙；

【Author】 Wei Hua;Zhiyuan Zhang;Long Ma;Zaiguo Gan;Huabin Yang;Minghui Huang;Chunli Yang;Mingming Zhang;Yulin Tian;Xiaohong Zhou;Cenxi Yuan;Caiwan Shen;Long Zhu;Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University;CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences;School of Nuclear Science and Technology, University of Chinese Academy of Sciences;School of Science, Huzhou University;

【通讯作者】滑伟;

【机构】 Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University； CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences； School of Nuclear Science and Technology, University of Chinese Academy of Sciences； School of Science, Huzhou University；

【摘要】 In this study,²¹⁸Ac and ²²¹Th nuclides were produced via the heavy-ion induced fusion evaporation reaction ⁴⁰Ar+¹⁸⁶W.Their decay properties were studied with the help of the gas-filled recoil spectrometer SHANS and a digital data acquisition system.The cross section ratio between ²²²Pa and ²¹⁸Ac was extracted experimentally,with measured value 0.69（9）.Two new possible a decay branches to ²²¹Th are suggested.The valence neutron configurations for the daughter ²¹⁷Ra are discussed in terms of the hindrance factors.更多还原

【Abstract】 In this study,²¹⁸Ac and ²²¹Th nuclides were produced via the heavy-ion induced fusion evaporation reaction ⁴⁰Ar+¹⁸⁶W.Their decay properties were studied with the help of the gas-filled recoil spectrometer SHANS and a digital data acquisition system.The cross section ratio between ²²²Pa and ²¹⁸Ac was extracted experimentally,with measured value 0.69（9）.Two new possible a decay branches to ²²¹Th are suggested.The valence neutron configurations for the daughter ²¹⁷Ra are discussed in terms of the hindrance factors.更多还原

【关键词】 fusion-evaporation reaction； α decay； fine structure； reduced width； hindrance factor；
【Key words】 fusion-evaporation reaction； α decay； fine structure； reduced width； hindrance factor；

【基金】 Supported by the National Natural Science Foundation of China (11805289, 11805291, 11875329);the Strategic Priority Research Program of Chinese Academy of Sciences (XDB34010000);the National Key R&D Program of China (2018YFA0404402)

【文献出处】 Chinese Physics C ,中国物理C , 编辑部邮箱 ,2021年04期

【分类号】O571.321
【下载频次】33

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α-decay study of ²¹⁸Ac and ²²¹Th in ⁴⁰Ar+¹⁸⁶W reaction