@article{7d894c91a80c49a4ab969c86ce75e1a8,

title = "Rapidity distributions of Z = 1 isotopes and the nuclear symmetry energy from Sn+Sn collisions with radioactive beams at 270 MeV/nucleon",

abstract = "The rapidity distributions of hydrogen isotopes emitted from central collisions of neutron-rich 132Sn+124Sn and neutron-deficient 108Sn+112Sn systems at 270 MeV/nucleon were investigated at RIKEN-RIBF. The data are compared with antisymmetrized molecular dynamics (AMD) calculations and the rapidity distributions can be reproduced after adjusting the in-medium nucleon-nucleon cross sections. The double ratios between the two reaction systems taken for the relative yields of deuteron to proton (d/p) and triton to proton (t/p) are further examined in the midrapidity domain, where the adjustments in the AMD calculations do not affect much on them. The d/p and t/p double ratios at midrapidity agree well with the ratio of the system neutron numbers and its squared value, respectively, and the rapidity dependence of these double ratios is consistent with a picture of partial mixing of colliding nuclei. By comparing with the AMD model which shows a strong symmetry energy dependence of the t/p double ratio, the experimental result in the midrapidity domain favors the calculation with a symmetry-energy slope parameter around L=46 MeV rather than L=108 MeV.",

keywords = "Antisymmetrized molecular dynamics, Cluster productions, Heavy radioactive isotope collisions, Nuclear symmetry energy",

author = "{SπRIT collaboration} and M. Kaneko and T. Murakami and T. Isobe and M. Kurata-Nishimura and A. Ono and N. Ikeno and J. Barney and G. Cerizza and J. Estee and G. Jhang and Lee, {J. W.} and Lynch, {W. G.} and C. Santamaria and Tsang, {C. Y.} and Tsang, {M. B.} and R. Wang and Ahn, {D. S.} and L. Atar and T. Aumann and H. Baba and K. Boretzky and J. Brzychczyk and N. Chiga and N. Fukuda and I. Ga{\v s}pari{\'c} and B. Hong and A. Horvat and T. Ichihara and K. Ieki and N. Inabe and Kim, {Y. J.} and T. Kobayashi and Y. Kondo and P. Lasko and Lee, {H. S.} and Y. Leifels and J. {\L}ukasik and J. Manfredi and McIntosh, {A. B.} and P. Morfouace and T. Nakamura and N. Nakatsuka and S. Nishimura and R. Olsen and H. Otsu and P. Paw{\l}owski and K. Pelczar and D. Rossi and H. Sakurai and H. Sato",

note = "Funding Information: 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 , 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. Publisher Copyright: {\textcopyright} 2021 The Author(s)",

year = "2021",

month = nov,

day = "10",

doi = "10.1016/j.physletb.2021.136681",

language = "English",

volume = "822",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

}