Production of neutron-rich nuclei in the vicinity of 78Ni: Fragmentation reactions of unstable 81Ga and 82Ge beams

Le résumé fourni par la source

The fragmentation reactions of neutron-rich unstable nuclei 81 Ga and 82 Ge at 250 MeV/nucleon have been studied in order to search the optimal mean for the production of very neutron-rich nuclei in the vicinity of 78 Ni. The newly measured cross sections were compared with various calculations, showing a good agreement with EPAX3.01. The present work provides experimental insights into the two-step scheme—fragmentation following fission—as a method to produce very neutron-rich nuclei through a combination of ISOL and fragmentation of post-accelerated beams of unstable nuclei. Our results enable an evaluation of the potential of the two-step scheme in the production of very neutron-rich nuclei for the 78 Ni region. The two-step scheme using fragmentation of a post-accelerated 81 Ga beam could be an option to produce neutron-rich nuclei around 78 Ni when the 81 Ga beam intensity reaches 1.0 × 10 8 pps, compared to the one-step scheme with fission of 238 U.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.