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Chinese Physics C > 2022, Vol. 46 > Issue(5): 054101 DOI: 10.1088/1674-1137/ac4b5c

Charge radii of potassium isotopes in the RMF (BCS)* approach

  • 1.

    Key Laboratory of Beam Technology of Ministry of Education, Institute of Radiation Technology, Beijing Academy of Science and Technology, Beijing 100875, China

  • 2.

    Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China

  • 3.

    School of Physics, Beihang University, Beijing 100191, China

  • 4.

    Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 102206, China

  • 5.

    School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, Henan 450001, China

  • 6.

    Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China

  • We apply the recently proposed RMF (BCS)* ansatz to study the charge radii of the potassium isotopic chain up to 52K. It is shown that the experimental data can be reproduced rather well, qualitatively similar to the Fayans nuclear density functional theory, but with a slightly better description of the odd–even staggerings (OES). Nonetheless, both methods fail for 50K and to a lesser extent for 48,52K. It is shown that if these nuclei are deformed with a $ \beta_{20}\approx-0.2 $ , then one can obtain results consistent with experiments for both charge radii and spin-parities. We argue that beyond-mean-field studies are needed to properly describe the charge radii of these three nuclei, particularly for 50K.
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Rong An, Shi-Sheng Zhang, Li-Sheng Geng and Feng-Shou Zhang. Charge radii of potassium isotopes in the RMF(BCS)* approach[J]. Chinese Physics C. doi: 10.1088/1674-1137/ac4b5c
Rong An, Shi-Sheng Zhang, Li-Sheng Geng and Feng-Shou Zhang. Charge radii of potassium isotopes in the RMF(BCS)* approach[J]. Chinese Physics C. doi:10.1088/1674-1137/ac4b5c shu
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Received: 2021-10-14
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