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3H/3He ratio as a probe of the nuclear symmetry energy at sub-saturation densities

  • Regular Article - Theoretical Physics
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Abstract

Within the newly updated version of the ultra-relativistic quantum molecular dynamics (UrQMD) model in which the Skyrme potential energy-density functional is introduced, the yield ratio between 3H and 3He clusters emitted from central 40Ca + 40Ca, 96Zr + 96Zr, 96Ru + 96Ru, and 197Au + 197Au collisions in the beam energy range from 0.12 to 1 GeV/nucleon is studied. The recent FOPI data for the 3H/3He ratio are compared with UrQMD calculations using 13 Skyrme interactions (all exhibiting similar values of iso-scalar incompressibility but very different density dependences of the symmetry energy). It is found that the 3H/3He ratio is sensitive to the nuclear symmetry energy at sub-saturation densities. Model calculations with moderately soft to linear symmetry energies are in qualitatively agreement with the 3H/3He ratio data of the FOPI Collaboration. This result is in line with both the recent constraints on the low-density symmetry energy available in the literature and our previous results for the high-density symmetry energy obtained with the elliptic flow of free nucleons and hydrogen isotopes as a sensitive probe.

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Authors and Affiliations

  1. School of Science, Huzhou University, 313000, Huzhou, P.R. China

    Yongjia Wang, Chenchen Guo & Qingfeng Li

  2. School of Nuclear Science and Technology, Lanzhou University, 730000, Lanzhou, P.R. China

    Yongjia Wang & Hongfei Zhang

  3. College of Nuclear Science and Technology, Beijing Normal University, 100875, Beijing, P.R. China

    Chenchen Guo

Authors
  1. Yongjia Wang
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  2. Chenchen Guo
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  3. Qingfeng Li
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  4. Hongfei Zhang
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Corresponding author

Correspondence to Qingfeng Li.

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Communicated by A. Ramos

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Wang, Y., Guo, C., Li, Q. et al. 3H/3He ratio as a probe of the nuclear symmetry energy at sub-saturation densities. Eur. Phys. J. A 51, 37 (2015). https://doi.org/10.1140/epja/i2015-15037-8

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  • DOI: https://doi.org/10.1140/epja/i2015-15037-8

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