β Decay of 20Na

20Na is a well-known β-delayed α emitter, owing to the large decay energy of 20Na above the α + 16O threshold in the A=5α daughter nucleus 20Ne. In this work, the decay property of 20Na is investigated in detail via the β-γ β-α and β-γ-α coincidence spectroscopy. As the day-one experiment of the Beijing Rare Isotope Facility (BRIF), the intense 20Na beam was produced using the Isotope Separator On Line (ISOL) technique through the 100 MeV proton bombarding a stack of MgO as a thick target. Specific interest was focused on the exotic decay mode of 20Na; the previously reported low-energy α lines at 713 and 846 keV were confirmed, and several weak β-γ-α decay sequences were clearly identified for the first time, thanks to the strong resolving power of α-γ coincidence spectroscopy. The decay properties of 20Na are compared to the shell model calculation, which agree reasonably well with the allowed β transition strengths and subsequent electro-magnetic transitions with the use of the sd shell-model space with the USDB interaction.

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Publication Details

Journal
Particles
Published
2026-04-17
DOI
https://doi.org/10.3390/particles9020040
Primary Topic
Nuclear physics research studies
Type
article
Field-Weighted Citation Impact
0.00

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article

β Decay of 20Na

X Q Li, Z X Li, Bing Guo, S. Q. Yan et al.
Particles
Nuclear physics research studies
article

β Decay of 20Na

X Q Li, Z X Li, Bing Guo, S. Q. Yan, 苏毅, Tian-Jue Zhang, Zhiyu Han, Weiping Liu, Chun-Guang Wang, Ruigang Ma, Bo Dai, Zi-Qiang Chen, Tao Ge, Xie Ma, Tianli Ma, Baoqun Cui, H Zhang, Hong-Yi Wu, B. Alex Brown, Gang Lian, Li-Hua Chen, Yang-Ping Shen, Yin-Long Lyu, Yun Zheng, Chao Zhou, Yun-Ju Li, Jun Su, Ying-Jun Ma, Sheng Zeng
article en

Abstract

20Na is a well-known β-delayed α emitter, owing to the large decay energy of 20Na above the α + 16O threshold in the A=5α daughter nucleus 20Ne. In this work, the decay property of 20Na is investigated in detail via the β-γ β-α and β-γ-α coincidence spectroscopy. As the day-one experiment of the Beijing Rare Isotope Facility (BRIF), the intense 20Na beam was produced using the Isotope Separator On Line (ISOL) technique through the 100 MeV proton bombarding a stack of MgO as a thick target. Specific interest was focused on the exotic decay mode of 20Na; the previously reported low-energy α lines at 713 and 846 keV were confirmed, and several weak β-γ-α decay sequences were clearly identified for the first time, thanks to the strong resolving power of α-γ coincidence spectroscopy. The decay properties of 20Na are compared to the shell model calculation, which agree reasonably well with the allowed β transition strengths and subsequent electro-magnetic transitions with the use of the sd shell-model space with the USDB interaction.

ParticlesVol. 9(2)
Peking University (CN), Beijing Normal University (CN), Southern University of Science and Technology (CN), China Institute of Atomic Energy (CN), Michigan State University (US), Xi'an Jiaotong University (CN), University of South China (CN)
National Science Foundation, National Natural Science Foundation of China
Affordable and clean energy
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