Projectile fragments from peripheral collisions of 25 MeV/nucleon ⁶⁴Ni on ⁶⁴Ni

¹ Laboratory of Physical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Athens, Greece
² Institute of Experimental and Applied Physics, Czech Technical University, Prague, Czech Republic
³ Cyclotron Institute, Texas A&M University, College Station, Texas, USA

^* e-mail: eirinikont@chem.uoa.gr

Published online: 8 October 2024

Abstract

We study the yields and the momentum distributions of projectile-like fragments from peripheral collisions of ⁶⁴Ni (25 MeV/nucleon) on ⁶⁴Ni. The experimental data were obtained in previous works with the BigSol separator system at the Cyclotron Institute of Texas A&M University. Projectile fragments were collected and analyzed at forward angles (1.5^°-3.0^°). The production cross sections and the momentum distributions (p/A) of the fragments were systematically studied and compared with the Deep-Inelastic Transfer (DIT) model and the Constrained Molecular Dynamics (CoMD) model followed by the deexcitation model GEMINI. Special attention is given to the possibility to produce neutron-rich rare isotopes of elements at the beginning of the astrophysical r-process. Moreover, efforts to reconstuct the excitation energy distributions are ongoing in hopes to shed light to the reaction mechanisms of peripheral collisions at this energy (25 MeV/nucleon).