학술논문
Rapidity distributions of Z = 1 isotopes and the nuclear symmetry energy from Sn+Sn collisions with radioactive beams at 270 MeV/nucleon
Document Type
article
Author
M. Kaneko; T. Murakami; T. Isobe; M. Kurata-Nishimura; A. Ono; N. Ikeno; J. Barney; G. Cerizza; J. Estee; G. Jhang; J.W. Lee; W.G. Lynch; C. Santamaria; C.Y. Tsang; M.B. Tsang; R. Wang; D.S. Ahn; L. Atar; T. Aumann; H. Baba; K. Boretzky; J. Brzychczyk; N. Chiga; N. Fukuda; I. Gašparić; B. Hong; A. Horvat; T. Ichihara; K. Ieki; N. Inabe; Y.J. Kim; T. Kobayashi; Y. Kondo; P. Lasko; H.S. Lee; Y. Leifels; J. Łukasik; J. Manfredi; A.B. McIntosh; P. Morfouace; T. Nakamura; N. Nakatsuka; S. Nishimura; R. Olsen; H. Otsu; P. Pawłowski; K. Pelczar; D. Rossi; H. Sakurai; H. Sato; H. Scheit; R. Shane; Y. Shimizu; H. Simon; T. Sumikama; D. Suzuki; H. Suzuki; H. Takeda; S. Tangwancharoen; Y. Togano; H. Törnqvist; Z. Xiao; S.J. Yennello; J. Yurkon; Y. Zhang
Source
Physics Letters B, Vol 822, Iss , Pp 136681- (2021)
Subject
Language
English
ISSN
0370-2693
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.