Study of nuclear structure effect on fusion through barrier distribution for the system28Si+154Sm

Gurpreet Kaur,P Sugathan,N Rowley,B.R Behera,A Jhingan

doi:10.1051/epjconf/20158600018

Abstract

We plan to perform large angle quasi-elastic scattering experiments using a 28Si beam on heavy targets in order to study the nuclear dynamics and structure effects. As a prelude to our first test experiment with a 154Sm target, we study here the existing fusion data for the same system through the barrier distribution.

Highlights

In heavy ion reactions, coupling to different channels affects the fusion process and gives information about the nuclear properties through the fusion excitation function [1] and the barrier distribution (BD) [2]
It has been suggested that channel couplings affect the scattering process and the nuclear structure information can be obtained from quasi-elastic (QE) scattering cross sections at large backward angles [3] and the corresponding BD [4]
From experimental and calculated fusion cross section, the barrier distributions have been obtained by taking the second derivative of the product Ec.mσc.m, with respect to Ec.m, where σc.m is the fusion cross section and Ec.m is the energy in center of mass frame

Summary

Introduction

In heavy ion reactions, coupling to different channels affects the fusion process and gives information about the nuclear properties through the fusion excitation function [1] and the barrier distribution (BD) [2]. It has been suggested that channel couplings affect the scattering process and the nuclear structure information can be obtained from quasi-elastic (QE) scattering cross sections at large backward angles [3] and the corresponding BD [4]. This even allows the study of very heavy systems leading to the creation of super-heavy compound nuclei [5,6] where fission and quasi-fission dominate, and the "fusion" barrier distribution becomes meaningless. The extracted BD has been compared with that obtained from coupled-channel calculations using different coupling schemes for the target and projectile; the results will guide us in performing the necessary scattering calculations for our future QE work, where this system will be used for our first test experiment

Preliminary Calculation

Theoretical Calculations for BD

Results and discussion

Summary and Conclusions