New isotope 44Si and systematics of the production cross sections of the most neutron-rich nuclei

Authors:
  • OTO. B. Tarasov
    O. B. Tarasov
  • TBT. Baumann
    T. Baumann
  • AAA. M. Amthor
    A. M. Amthor
  • DBD. Bazin
    D. Bazin
  • CIC. M. Folden Iii
    C. M. Folden Iii
  • AGA. Gade
    A. Gade
  • TGT. N. Ginter
    T. N. Ginter
  • MHM. Hausmann
    M. Hausmann
  • MMM. Matos
    M. Matos
  • DMD. J. Morrissey
    D. J. Morrissey
  • ANA. Nettleton
    A. Nettleton
  • MPM. Portillo
    M. Portillo
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Abstract
The results of measurements of the production of neutron-rich nuclei by the fragmentation of a 48Ca beam at 142 MeV/u are presented. Evidence was found for the production of a new isotope that is the most neutron-rich silicon nuclide, 44Si, in a net neutron pick-up process. A simple systematic framework was found to describe the production cross sections based on thermal evaporation from excited prefragments that allows extrapolation to other weak reaction products.