| α-decay study of 218Ac and 221Th in 40Ar+186W reaction |
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| 作者姓名： | 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 |
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| 作者单位： | Sino-French Institute of Nuclear Engineering and Technology;CAS Key Laboratory of High Precision Nuclear Spectroscopy;School of Nuclear Science and Technology;School of Science |
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| 基金项目： | 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)。 |
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| 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,withmeasured value 0.69(9).Two new possible α decay branches to 221Th are suggested.The valence neutron configurations for the daughter 217Ra are discussed in terms of the hindrance factors.
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| 关 键 词： | fusion-evaporation reaction αdecay fine structure reduced width hindrance factor |
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