Eur. Phys. J. A (2020) 56: 110
https://doi.org/10.1140/epja/s10050-020-00114-y

Regular Article –Theoretical Physics

Isospin dependence of fragment yields in peripheral heavy ion collisions

¹ Department of Physics, Selcuk University, 42079, Kampus, Konya, Turkey
² FIAS and ITP J.W. Goethe University, 60438, Frankfurt am Main, Germany
³ Institute for Nuclear Research, Russian Academy of Sciences, 117312, Moscow, Russia

^* e-mail: rogul@selcuk.edu.tr

Received: 29 September 2019
Accepted: 19 February 2020
Published online: 8 April 2020

Abstract

We have theoretically investigated isospin dependence in peripheral isospin asymmetric Sn + Sn and Sn + Sn reaction systems at 50 MeV/nucleon projectile energy. Mass, charge and isotope yields emitted from the excited quasiprojectile sources are obtained within a statistical approach. In order to interpret the experimental data, the N/Z ratio, isotope yield, and isoscaling analyses were carried out for light intermediate mass fragments (with , at available data range). We show that predicted results produced for fragment yields, are consistent with the experimental data for peripheral isospin asymmetric reaction systems. From the comparison of the statistical model predictions with experimental data, it is concluded that a lower value of the effective symmetry-term coefficient must be considered at low density freeze-out. Statistical analysis of isoscaling shows that the isoscaling parameter is very sensitive to the isospin composition (N/Z ratio) of the the sources, and it is proportional to the strength of the symmetry-term coefficient.