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Probing nuclear bubble configuration by the \(\pi^{-} / \pi^{+}\) ratio in heavy-ion collisions

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Abstract.

It is theoretically and experimentally argued that there may exist bubble or toroid-shaped configurations in some nucleus systems. Based on the isospin-dependent transport model of nucleus-nucleus collisions, here we propose a method to probe the bubble configuration in the nucleus. That is, one could use the value of the \( \pi^{-} / \pi^{+}\) ratio especially its kinetic energy distribution in head-on collision at intermediate energies to probe whether there is bubble configuration or not in projectile and target nuclei. Due to different maximum compressions and the effect of symmetry energy, the value of the \(\pi^{-} / \pi^{+}\) ratio in the collision of bubble nuclei is evidently larger than that in the collision of normal nuclei.

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Authors and Affiliations

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

    Gao-Chan Yong

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  1. Gao-Chan Yong
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Correspondence to Gao-Chan Yong.

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Communicated by Xin-Nian Wang

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Yong, GC. Probing nuclear bubble configuration by the \(\pi^{-} / \pi^{+}\) ratio in heavy-ion collisions. Eur. Phys. J. A 52, 118 (2016). https://doi.org/10.1140/epja/i2016-16118-x

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  • DOI: https://doi.org/10.1140/epja/i2016-16118-x

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