Collision dynamics using neutron rich and deficient Sn + Sn collisions with 270MeV/u

ORAL

Abstract

Heavy-ion collisions are utilized to investigate nuclear EOS worldwide because it is a unique tool to analyze nuclear EOS under supra-saturation density in laboratories. Various observables are proposed and measured as sensitive probes to investigate the symmetry energy in the dense matter produced by heavy-ion collisions. We have performed experiments using Sn isotope beams. nucleus+nucleus collisions for 132Sn+124Sn and 108Sn+112Sn, and 124Sn+112Sn at 270 MeV/u was carried out to study system dependence with different isospin asymmetries and a common total charge.

In this talk, we discuss the observables related to the light-charged particles, including stopping power, collective flow, and the free neutron/proton ratio comparing three systems.

The results offer further insights into the dynamics of heavy-ion collisions and the cluster formation process, which is beneficial in a comprehensive understanding of the nucleus+nucleus collision dynamics and nuclear EOS.

*This work was supported by the Japanese MEXT KAKENHI (Grant-in-Aid for Scientific Research on Innovative Areas) grant No. 24105004, JSPS KAKENHI Nos. JP17K05432 and JP19K14709, and JP21KK03528, the U.S. Department of Energy under Grant Nos. DE-SC0014530, DE-NA0002923, and DE-FG02-93ER40773, the US National Science Foundation Grant No. PHY-1565546, the Polish National Science Center (NCN), Poland, under contract Nos. UMO-2013/09/B/ST2/ 04064 and UMO-2013/10/M/ST2/00624, and the National Research Foundation of Korea (NRF) under Grant Nos. 2018R1A5A1025563, 2016K1A3A7A09005578, and 2013M7A1A1075764. I. G. was supported by HIC for FAIR and the Croatian Science Foundation under projects Nos. 1257 and 7194. One of the authors (M. K.) acknowledges the support from the RIKEN Junior Research Associate Program. The computing resource for the data analysis and the theoretical calculations were provided by the HOKUSAI GreatWave system at RIKEN. The authors also wish to thank the accelerator technical staff at RIBF for the excellent beam supply.

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Presenters

  • Mizuki Kurata-NIshimura

    • RIKEN
    • RIKEN Nishina Center

Authors

  • Mizuki Kurata-NIshimura

    • RIKEN
    • RIKEN Nishina Center

  • Tadaaki Isobe

    • RIKEN Nishina Center
    • RIKEN

  • Tetsuya Murakami

    • Kyoto Univ

  • Akira Ono

    • Tohoku University

  • Natsumi Ikeno

    • Department of Life and Environmental Agricultural Sciences, Tottori University
    • Tottori University

  • Chun Yuen Y Tsang

    • Kent State University
    • FRIB

  • Manyee B Tsang

    • Michigan State University

  • William G Lynch

    • Michigan State University

  • Hideaki Otsu

    • RIKEN
    • RIKEN Nishina Center

  • Hiroyoshi Sakurai

    • RIKEN
    • RIKEN Nishina Center