alpha-decay study of Ac-218 and Th-221 in Ar-40+W-186 reaction
alpha-decay study of Ac-218 and Th-221 in Ar-40+W-186 reaction
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Ar-40 W-186 反应中 Ac-218 和 Th-221 的 α 衰变研究
DOI：
10.1088/1674-1137/abe0bd
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发表时间：
2021
影响因子：
3.6
通讯作者：
Zhu Long
中科院分区：
文献类型：
--
作者：
Hua Wei;Zhang Zhiyuan;Ma Long;Gan Zaiguo;Yang Huabin;Huang Minghui;Yang Chunli;Zhang Mingming;Tian Yulin;Zhou Xiaohong;Yuan Cenxi;Shen Caiwan;Zhu Long
本研究通过重离子诱发的40 Ar+ 186 W聚变蒸发反应制备了218 Ac和221 Th核素。利用充气反冲谱仪SHANS和数字数据采集系统研究了它们的衰变特性。实验提取了222 Pa和218 Ac之间的截面比，测量值为0.69（9）。提出了~（221）Th的两个新的α衰变分支。子体217 Ra的价中子组态的阻碍因素进行了讨论。
In this study, 218 Ac and 221 Th nuclides were produced via the heavy-ion induced fusion evaporation reaction 40 Ar+ 186 W. 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 222 Pa and 218 Ac was extracted experimentally, with measured value 0.69 (9). Two new possible α decay branches to 221 Th are suggested. The valence neutron configurations for the daughter 217 Ra are discussed in terms of the hindrance factors.