Unit:
Department of ChemistryLibrary of the School of Science
Author:
Koulouris Stergios
Dissertation committee:
Georgios A. Souliotis, Professor, Department of Chemistry, National and Kapodistrian University of Athens
Francesco Cappuzzello, Professor, Department of Physics, University of Catania
Martin Veselsky, Principal Investigator, Institute of Experimental and Applied Physics, Czech Technical University
Efstathios Stiliaris, Professor, Department of Physics, National and Kapodistrian University of Athens
Andreas Koutselos, Professor, Department of Chemistry, National and Kapodistrian University of Athens
Demeter Tzeli, Associate Professor, Department of Chemistry, National and Kapodistrian University of Athens
Anthoula Papageorgiou, Assistant Professor, Department of Chemistry, National and Kapodistrian University of Athens
Original Title:
Studies of Peripheral Heavy-ion Reactions with the MAGNEX Spectrometer for the Production of Neutron-rich Isotopes
Translated title:
Studies of Peripheral Heavy-ion Reactions with the MAGNEX Spectrometer for the Production of Neutron-rich Isotopes
Summary:
Peripheral reactions of medium-mass nuclei in the Fermi energy regime (10-30 MeV/nucleon) offer a promising pathway for producing exotic neutron-rich isotopes and probing intricate reaction mechanisms. The work of this thesis constitutes a systematic study of peripheral reactions of medium-mass nuclei in the Fermi energy regime, focusing on the reaction of 70Zn (15 MeV/nucleon) + 64Ni using the MAGNEX spectrometer. MAGNEX through its advanced ray-reconstruction methods allowed for the precise determination of ejectiles with respect to the atomic number Z, the mass number A, the momentum per nucleon p/A and the reaction angle θlab. The experimental p/A, angular, production cross
sections, and excitation energy distributions for several multinucleon transfer channels were extracted and studied in detail, along with comparisons to theoretical models and kinematic calculations. This work indicated the dominance of direct reaction mechanisms at low excitation energy (below about 20 MeV) and the appearance of more complicated processes (beyond independent nucleon exchange) at higher excitation energy. Comparative analyses with the DIT, CoMD, and GEMINI models indicated an overall satisfactory description and underscored their limitations in certain reaction channels, highlighting the need for further developments and the integration of direct reaction codes in the context of this research direction.
This work not only deepens our understanding of peripheral heavy-ion reactions, but also outlines the pivotal role of the MAGNEX magnetic spectrometer in modern nuclear research. Its state-of-the-art design and high-resolution capabilities pave the way for future studies aimed at optimizing the production of exotic nuclei and exploring the underlying dynamics of nuclear reactions.
Main subject category:
Science
Keywords:
Heavy Ion Reactions, Large Acceptance Spectrometer, Neutron Rich Isotopes, Multinucleon Transfer, Momentum and Angular Distributions
Number of references:
107
