الفهرس 
الفصل الاولOnly 14 pages are availabe for public view
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Abstract
Research and studies on exotic nuclei, such as halo nuclei, and their reactions represent one of the most active research subjects in modern nuclear physics, and as our nuclear models and computational tools become more advanced, we come to understandthe behavior of these nuclei and their reactionseven more,and thus many theoretical models and computational methods have been proposed to study these “exotic” nuclei. They range from models that are as simple as the optical models to the more advanced models such as the many-cluster models and AB-initio methods such as the Variation Monte Carlo approaches.
Although studying observables such as the energy spectrum and electromagnetic angular momentum transition using some of the more advanced models,specifically the many cluster models, has been done as early as the 1980’s, studying halo nuclei reactions has proven to be difficult and was only done by combining the two-cluster approach with the Continuum Discretised Coupled Channels (CDCC) for the one neutron, or as an approximation for the two neutron halo nuclei or using high energy approximations.Only recently has the CDCC approach been extended to the three cluster model for the two neutron halo nuclei . In chapter 1 of this thesis, we present a concise overall review of the history of the research on nuclei then we focus our review on 6He. In chapter 2, we explore some of the models and theoretical aspects used in studying these nuclei including the folding model which we use in our calculations. In chapter 3, a description of the computational methods we used in our calculations is presented. Our calculation itself consists of computing the folding potential between the target through the use of the code DFPOT, which are 27Al,179Au,58Ni,120Sn and and 208Pb and the projectiles which are 6He,8He and 4He using five nuclear matter densities(Gaussian-Gaussian,Gaussian-Halo,Gaussian-Oscillator,Symmetrized-Fermi and a derived Woods-Saxons formula).This folded potential is then multiplied by two parameters NR and NI, representing a normalization or depth for the potentials,to obtain a real and an imaginary potential.This complex potential is then used to calculate the elastic cross section. We obtainvalues for the NR and NIparameters using a fitting code that varies the parameters until a good fit to the experimental data is obtained. This process is described in detail throughout the thesis.
In chapter 4, we show our calculated results beginning by charts showing the calculated folding potentialfollowed by a comparison between the calculated elastic cross section and the experimental data for all the reactions and then we present tables of the parameters obtained during the fitting process for each system.
Finally, an appendix containing the fitting program source code is also included.