The potential for the Sao Paulo: a general description of nuclear reactions between heavy ions

Author(s)

Leandro Romero Gasques

• Document type: Doctoral Thesis
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Instituto de Física (IF/SBI)
• Defense date: 2003-08-15

Examining board members

Luiz Carlos Chamon; Nemitala Added; Raul José Donângelo; Sérgio José Barbosa Duarte; Raphael Liguori Neto

• Advisor: Luiz Carlos Chamon

Abstract

In this work, we present a nonlocal model for the real parto f the nuclear interaction that is based on quantum effects related to the Exchange of nucleons between the target and the projectile (Pauli nonlocality). This model is totally parameter-free and hás been sucessful in describing the elastic and inelastic scattering, transfer and fusion processes, from sub-Coulomb to intermediate energies. Elastic scattering differential cross sections have been measured for the 4,6He, 12C, 28Si+ 58Ni systems at sub-barrier energies. The corresponding nuclear potentials have been determined and compared with the results obtained using the nonlocal model. If the nonlocal model is assumed for the interaction and the density o fone nucleus is know, na unfolding method can be used to extract the density of the other nucleus from the elastic scattering data analysis. In this work, we present the results obtained for the densities of the 4,6He, 12C,16,18 and 28Si nuclei. Using the nonlocal interaction in the contexto f the unidimensional barrier penetration model, we have also studied a systematics involving about 2500 experimental fusion data for 165 different systems. (AU)