رسائل ماجيستير
English
2023
The Effect of the Proton and Neutron as Probe for the Nuclear Fusion Reactions at Near-Barrier Energies
فؤاد عطية مجيد, منتظر احمد خضر حسن
كلية التربية للعلوم الصرفة-جامعة بابل · العراق
In the current work, calculations have been carried out for the cross-section, total fusion 𝜎𝑓𝑢𝑠, fusion barrier distribution 𝐷𝑓𝑢𝑠, and fusion probability 𝑃𝑓𝑢𝑠by using both the quantum mechanical and semi-classical approaches for the systems 28Si+90Zr, 28Si+92Zr, 28Si+94Zr, 28Si+96Zr, 32S+90Zr, 32S+96Zr, 35Cl+92Zr, 41K+ 28Si, 45K+ 28Si, 44Ar+28Si, 41K+16O that involving one neutron or one proton transfer reactions.The quantum mechanical and semi-classical approaches involved the use of the Brillouin, Kramers, and Wenzel (WKB) approximation to describe the relative motion between the projectile and target nuclei, and the Continuum Discretized Coupled Channel (CDCC) method of Alder-Winther (AW) to describe the intrinsic motion of the nuclei.For the semi-classical approach, calculations were made by using the computer program SCF(Sequential Complete Fusion),while for the quantum mechanical approach, calculations were made by using the computer program CC(Coupled-Channels) , and both programs are written by the programing language (Fortran 90).The same Wood Saxon parameters for Akyüz Winter potential have been set for both approaches, and the results for both approaches have been compared with the measured experimental data, when adding the effect of coupling between the elastic and break-up channel. The semi-classical approach calculations well described all the measured systems above the Coulomb barrier and the results below and around the Coulomb barrier have been improved when the coupling has been considered, while for the quantum mechanical approach, the coupling enhance the calculations above the “Coulomb barrier”and below the “Coulomb barrier”is very far and could not describe the data in most of the studied systems.
