Fusion reactions in a "double folding" microscopic model

• Grant number: 14/13067-9
• Support type: Regular Research Grants
• Duration: October 01, 2014 - September 30, 2016
• Field of knowledge: Physical Sciences and Mathematics - Physics - Nuclear Physics
• Principal researcher: Marlete Pereira Meira de Assuncao
• Grantee: Marlete Pereira Meira de Assuncao
• Home Institution: Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF). Universidade Federal de São Paulo (UNIFESP). Campus Diadema. Diadema , SP, Brazil
• Assoc. researchers: Pierre Descouvemont

Abstract

This project is an extension of our collaboration that has been developed since 2009, on experimental and theoretical topics in nuclear physics and in nuclear astrophysics. Here, we focus on calculations of cross sections for the fusion reactions 16O +16O, 12C+16O, and 12C +208Pb in a "Double Folding" Multichannel Model. In this approach, the densities of 12C and 16O are obtained from a microscopic cluster model, for the ground state and for the excited states of the colliding nuclei. Then the real part of the nucleus-nucleus potentials are computed from a folding procedure, using a nucleon-nucleon interaction. The imaginary part is simulated by a short-range absorption potential, whose parameters have a weak influence on the fusion cross sections. This means that the formulation is virtually free of parameters. The elastic and fusion cross sections are described simultaneously. Elastic cross sections are usually known experimentally, and are used to test the reliability of the model. The proposed approach has been already applied to the 12C+12C fusion reaction, and may be also relevant for applications to other reactions, involving exotic nuclei such as 10C or 15C. (AU)