Global analysis of Skyrme forces with higher-order density dependencies

  • The density-dependent term in Skyrme forces is essential to simulate three-body and many-body correlations beyond the low-momentum two-body interaction. We speculate that a single density term may be insufficient and a higher-order density dependent term is added. The present work investigates the influence of higher-order density dependencies based on extended UNEDF0 and SkM* forces. Global descriptions of nuclear masses and charge radii are presented. The extended UNEDF0 force gives a global rms error on binding energies of 1.29 MeV. The influence on fission barriers and equation of state are also investigated. Perspectives to improve Skyrme forces are discussed, including global center-of-mass corrections and Lipkin-Nogami pairing corrections.
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Zhi-Wei Zuo, Jun-Chen Pei, Xue-Yu Xiong and Yi Zhu. Global analysis of Skyrme forces with higher-order density dependencies[J]. Chinese Physics C, 2018, 42(6): 064106. doi: 10.1088/1674-1137/42/6/064106
Zhi-Wei Zuo, Jun-Chen Pei, Xue-Yu Xiong and Yi Zhu. Global analysis of Skyrme forces with higher-order density dependencies[J]. Chinese Physics C, 2018, 42(6): 064106.  doi: 10.1088/1674-1137/42/6/064106 shu
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Received: 2018-02-08
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    Supported by National Natural Science Foundation of China (11522538)

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Global analysis of Skyrme forces with higher-order density dependencies

  • 1. State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
Fund Project:  Supported by National Natural Science Foundation of China (11522538)

Abstract: The density-dependent term in Skyrme forces is essential to simulate three-body and many-body correlations beyond the low-momentum two-body interaction. We speculate that a single density term may be insufficient and a higher-order density dependent term is added. The present work investigates the influence of higher-order density dependencies based on extended UNEDF0 and SkM* forces. Global descriptions of nuclear masses and charge radii are presented. The extended UNEDF0 force gives a global rms error on binding energies of 1.29 MeV. The influence on fission barriers and equation of state are also investigated. Perspectives to improve Skyrme forces are discussed, including global center-of-mass corrections and Lipkin-Nogami pairing corrections.

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