Description of the Fusion-Fission Reactions in the Framework of Dinuclear System Conception

Sh A Kalandarov,J.P Wieleczko,N V Antonenko,G G Adamian,V Greco,S Pirrone,C Spitaleri,F Rizzo,M La Cognata

doi:10.1051/epjconf/201611708007

Abstract

Within the dinuclear system model fusion-fission reactions 78Kr+40Ca and 86Kr+48Ca is investigated. The charge distributions of the decay products are predicted at bombarding energy 10 MeV/nucleon. The competition is treated between complete fusion followed by the decay of compound nucleus and quasifission channels. The possible explanation of the odd-even staggering in the yield of the final reaction products at high excitation energies is discussed.

Highlights

The experimentally measured charge, mass, and isotopic distributions of reaction products carry important information about both the reaction mechanism and the interfacing structure of nuclei and reaction dynamics [1,2,3,4,5,6,7]
One of the possible explanations for the odd-even staggering at high excitation energies is that the fragments with 5 ≤ Z ≤ 16 mainly come out at the first step of de-excitation cascade and these nuclei preserve their structure during the formation stage and, the primary charge distribution has strong odd-even staggering
The driving potentials, which are responsible for the formation of different dinuclear system (DNS) configurations, are shown in Fig. 1 for both reactions

Summary

Introduction

The experimentally measured charge, mass, and isotopic distributions of reaction products carry important information about both the reaction mechanism and the interfacing structure of nuclei and reaction dynamics [1,2,3,4,5,6,7]. One of such interesting experimental findings in the binary heavy-ion reactions is the persistence of the odd-even staggering in the charge distributions of reaction products at relatively high bombarding energies [3,5,6]. The purpose of the present work is to demonstrate the influence of isospin of the system on the reaction mechanism and, correspondingly, on the charge, mass, isotopic distributions of the reaction products and on the odd-even staggering effect

Objectives

Results

Conclusion