Eur. Phys. J. A (2016) 52: 327
https://doi.org/10.1140/epja/i2016-16327-3

Regular Article - Theoretical Physics

A search for parameters of universal sub-barrier fusion excitation function

¹ School of Physics and Nuclear Energy Engineering, Beihang University, 100191, Beijing, China
² School of Radiation Medicine and Protection, Medical College of Soochow University, 215123, Soochow, China
³ Henryk Niewodniczański Institute of Nuclear Physics PAS, 31-342, Cracow, Poland

^* e-mail: zgl@buaa.edu.cn

Received: 10 July 2016
Accepted: 2 October 2016
Published online: 7 November 2016

Abstract

Many fusion experimental data have been analyzed in terms of a simple universal function which could be used for predictions of fusion cross section below the barrier for arbitrary systems. Sub-barrier fusions based on the concept of Q -fusion value dependence were studied. It is attempted to parameterize the energy-reduced fusion excitation functions around the Coulomb barriers by an analytical phenomenological function. It was found that the speed of driving nuclei towards fusion is faster with the increase of mass asymmetry of colliding systems and those systems with a large difference of the ratio of neutrons to protons. However, a general trend with respect to total mass has not been observed. An exposition of more qualitative conclusions is hindered by apparent inconsistencies of measured fusion cross sections.