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Opportunities for production and property research of neutron-rich nuclei around N = 126 at HIAF

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Abstract

The study of nuclide production and its properties in the \({N}=126\) neutron-rich region is prevalent in nuclear physics and astrophysics research. The upcoming High-energy FRagment Separator (HFRS) at the High-Intensity heavy-ion Accelerator Facility (HIAF), an in-flight separator at relativistic energies, is characterized by high beam intensity, large ion-optical acceptance, high magnetic rigidity, and high momentum resolution power. This provides an opportunity to study the production and properties of neutron-rich nuclei around \({N}=126\). In this paper, an experimental scheme is proposed to produce neutron-rich nuclei around \({N}=126\) and simultaneously measure their mass and lifetime based on the HFRS separator; the feasibility of this scheme is evaluated through simulations. The results show that under the high-resolution optical mode, many new neutron-rich nuclei approaching the r-process abundance peak around \({A}=195\) can be produced for the first time, and many nuclei with unknown masses and lifetimes can be produced with high statistics. Using the time-of-flight corrected by the measured dispersive position and energy loss information, the cocktails produced from \({}^{208}\)Pb fragmentation can be unambiguously identified. Moreover, the masses of some neutron-rich nuclei near \({N}=126\) can be measured with high precision using the time-of-flight magnetic rigidity technique. This indicates that the HIAF-HFRS facility has the potential for the production and property research of neutron-rich nuclei around \({N}=126\), which is of great significance for expanding the chart of nuclides, developing nuclear theories, and understanding the origin of heavy elements in the universe.

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Data Availability

The data that support the findings of this study are openly available in Science Data Bank at https://cstr.cn/31253.11.sciencedb.j00186.00512 and https://doi.org/10.57760/sciencedb.j00186.00512

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Authors and Affiliations

  1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China

    Shao-Bo Ma, Li-Na Sheng, Xue-Heng Zhang, Shi-Tao Wang, Kai-Long Wang, Hool-Jin Ong, Zhi-Yu Sun, Shu-Wen Tang, Yu-Hong Yu, Xin-Tong Du & Xiao-Bao Wei

  2. Advanced Energy Science and Technology Guangdong Laboratory, Huizhou, 516000, China

    Shao-Bo Ma, Xue-Heng Zhang, Zhi-Yu Sun & Yu-Hong Yu

  3. University of Chinese Academy of Sciences, Beijing, 100049, China

    Li-Na Sheng, Xue-Heng Zhang, Shi-Tao Wang, Kai-Long Wang, Hool-Jin Ong, Zhi-Yu Sun, Shu-Wen Tang & Yu-Hong Yu

  4. College of Physics, Henan Normal University, Xinxiang, 453007, China

    Chun-Wang Ma & Xiao-Bao Wei

  5. Institute of Nuclear Science and Technology, Henan Academy of Science, Zhengzhou, 450046, China

    Chun-Wang Ma

  6. Joint-Department for Nuclear Physics, Lanzhou University and Institute of Modern Physics, Lanzhou, 730000, China

    Hool-Jin Ong

  7. Research Center for Nuclear Physics, Osaka University, Osaka, 567-0047, Japan

    Hool-Jin Ong

  8. RIKEN Nishina Center, Saitama, 351-0198, Japan

    Hool-Jin Ong

  9. Northwest Normal University, Lanzhou, 730070, China

    Xin-Tong Du

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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Shao-Bo Ma, Li-Na Sheng, Kai-Long Wang and Xue-Heng Zhang. The first draft of the manuscript was written by Shao-Bo Ma, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Xue-Heng Zhang.

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This work was supported by the High-Intensity heavy-ion Accelerator Facility (HIAF) project approved by the National Development and Reform Commission of China.

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Ma, SB., Sheng, LN., Zhang, XH. et al. Opportunities for production and property research of neutron-rich nuclei around N = 126 at HIAF. NUCL SCI TECH 35, 97 (2024). https://doi.org/10.1007/s41365-024-01454-w

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