Fine structure of α decay in 222Pa

• With the help of the gas-filled recoil spectrometer SHANS and a digital data acquisition system, the fine structure of the $\alpha$ decay for $^{222}$Pa was studied. The nuclides were produced through the 1p3n evaporation channel via the heavy-ion induced fusion evaporation reaction $^{40}$Ar + $^{186}$W. Based on the ER-$\alpha 1$-$\alpha 2$-$\alpha 3$ and $\alpha$-$\gamma$ correlation measurement, three new $\alpha$ decays were observed in addition to the three branches known previously. The one with the largest $\alpha$ decay energy was regarded as the ground state to ground state transition. The newly measured $\alpha$ decay properties of $^{222}$Pa were examined in a framework of reduced width.
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Wei Hua, Zhiyuan Zhang, Long Ma, Zaiguo Gan, Huabin Yang, Cenxi Yuan, Minghui Huang, Chunli Yang, Mingming Zhang, Yulin Tian and Xiaohong Zhou. Fine structure of α decay in 222Pa[J]. Chinese Physics C.
Wei Hua, Zhiyuan Zhang, Long Ma, Zaiguo Gan, Huabin Yang, Cenxi Yuan, Minghui Huang, Chunli Yang, Mingming Zhang, Yulin Tian and Xiaohong Zhou. Fine structure of α decay in 222Pa[J]. Chinese Physics C.
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• 1.

沈阳化工大学材料科学与工程学院 沈阳 110142

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Fine structure of α decay in 222Pa

• 1. Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
• 2. CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
• 3. School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China

Abstract: With the help of the gas-filled recoil spectrometer SHANS and a digital data acquisition system, the fine structure of the $\alpha$ decay for $^{222}$Pa was studied. The nuclides were produced through the 1p3n evaporation channel via the heavy-ion induced fusion evaporation reaction $^{40}$Ar + $^{186}$W. Based on the ER-$\alpha 1$-$\alpha 2$-$\alpha 3$ and $\alpha$-$\gamma$ correlation measurement, three new $\alpha$ decays were observed in addition to the three branches known previously. The one with the largest $\alpha$ decay energy was regarded as the ground state to ground state transition. The newly measured $\alpha$ decay properties of $^{222}$Pa were examined in a framework of reduced width.

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