Structural and isospin effects on balance energy and transition energy via different nuclear charge radii parameterizations

摘要

The structural and isospin effects have been studied through isospin dependent and independent nuclear charge radii parameterizations on the collective flow within the framework of Isospin-dependent Quantum Molecular Dynamics (IQMD) model. The calculations have been carried out by using two approaches: (i) for the reaction series having fixed N/Z ratio and (ii) for the isobaric reaction series with different N/Z ratio. Our results indicate that there is a considerable effect of radii parameterizations on the excitation function of reduced flow (partial derivative v1/partial derivative Y-red) and elliptical flow (v(2)). Both balance energy (E-bal) and transition energy (E-trans) are enhanced with increase in radii of reacting nuclei and found to follow a power law with nuclear charge radii. The exponent tau values show that the elliptical flow is more sensitive towards different nuclear charge radii as compared to reduced flow. Moreover, we observe that our theoretical calculation of E-bal and E-trans are in agreement with the experimental data provided by GSI, INDRA and FOPI collaborations. (C) 2017 Elsevier B.V. All rights reserved.