Speaker
Sergey Lukyanov
(Flerov Laboratory of JINR)
Description
Multinucleon transfer (MNT) reactions induced by 40,48Ca ions on Au target have been studied at 400 MeV bombarding energy. Projectile-like fragments have been identified in nuclear charge, angular and kinetic energy distributions and inclusive cross sections were measured. Two groups of products were identified in: 1) deep-inelastic products, the maximum yield of these products was at forward direction and 2) quasi-elastic with the formation of projectile-like products, with the maximum yield of these products at the grazing angle.
In the reaction 48Ca+Au, for witch quasi-elastic dominated, the angular distributions of the products of stripping and picking up protons (up to 8 ) were measured (Fig.2), and it was found that the cross sections of stripping protons were close to the corresponding values of picking up the same number of protons from the nucleus of the incident ion. Otherwise, in the reaction 40Ca+Au, only proton stripping channels were observed in the quasi-elastic channel and the process of picking up protons was not token place. This behavior was interpreted by extra neutron excess in 48Ca, allowing to pickup additional proton for N/Z balance in MNT process. Our finding might be important from the point of view of astrophysics and an optimization of primary reaction to produce secondary beams in the region mass A≥48.
Primary author
Sergey Lukyanov
(Flerov Laboratory of JINR)
