Enhanced Production of Neutron-Rich Rare Isotopes in Peripheral Collisions at Fermi Energies
2003; American Physical Society; Volume: 91; Issue: 2 Linguagem: Inglês
10.1103/physrevlett.91.022701
ISSN1092-0145
AutoresG. A. Souliotis, M. Veselský, G. Chubarian, L. Trache, A. Keksis, E. Martin, D. V. Shetty, S. J. Yennello,
Tópico(s)Nuclear reactor physics and engineering
ResumoA large enhancement in the production of neutron-rich projectile residues is observed in the reactions of a 25 MeV/nucleon 86Kr beam with the neutron-rich 124Sn and 64Ni targets relative to the predictions of the EPAX parametrization of high-energy fragmentation, as well as relative to the reaction with the less neutron-rich 112Sn target. A hybrid model based on a deep-inelastic transfer (DIT) code followed by a statistical deexcitation code accounts for part of the observed large cross sections. The DIT simulation indicates that the production of neutron-rich nuclides in these reactions is associated with peripheral nucleon exchange in which the neutron skins of the neutron-rich 124Sn and 64Ni target nuclei may play an important role. From a practical viewpoint, such reactions offer a novel synthetic avenue to access extremely neutron-rich rare isotopes towards the neutron-drip line.
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