Unit:
Κατεύθυνση ΦυσικοχημείαLibrary of the School of Science
Author:
Papageorgiou Athanasios
Supervisors info:
Γεώργιος Α. Σουλιώτης, Αναπληρωτής καθηγητής τμήματος Χημείας, ΕΚΠΑ
Original Title:
Παραγωγή σπανίων ισοτόπων πλούσιων σε νετρόνια με σταθερές και ραδιενεργές δέσμες ενέργειας 15 MeV/A
Translated title:
Production of rare neutron-rich isotopes with stable and radioactive beams at 15 MeV/A
Summary:
In the present work we present our continued efforts to study the production of rare isotopes with heavy-ion beams at energy 15 MeV/nucleon. Our calculations are based on a two-step approach: the dynamical stage of the collision is described with either the phenomenological Deep-Inelastic Transfer model (DIT), or with the microscopic Constrained Molecular Dynamics model (CoMD). The de-excitation of the hot heavy projectile fragments is performed with the Statistical Multifragmentation Model (SMM). We first present experimentally acquired production cross sections of neutron-rich nuclides from collisions of a 40Ar stable beam with targets of 58Ni, 64Ni and 27Al [5] and we compare them with our calculations. Then we performed calculations for the same beam (15 MeV/nucleon) with other neutron rich targets such as 48Ca and 238U and find that the multinucleon transfer mechanism leads to very neutron-rich nuclides in mass range A ~ 40-60. Motivated by the high production cross section of target 238U, we performed calculation with beam of 48Ca (15 MeV/nucleon). We found that we can produce radioactive beams of 46Ar and 54Ca which can be reaccelerated and hit another target of 238U, participating in reactions of multinucleon transfer which can produce extremely neutron-rich and even new isotopes. We think that our continued progress on the study of multinucleon transfer reactions using beams of 15 MeV/nucleon (below Fermi energy), in combination with enhanced capabilities of present and upcoming low-energy accelerator facilities worldwide can provide new and exciting opportunities in rare isotope research in the near future.
Main subject category:
Science
Other subject categories:
Nuclear physics
Keywords:
heavy ion nuclear reactions, deep inelastic collisions, cross section, radioactive beams, neutron drip-line
