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Systematics of induced8 radioactive beam reactions: E=13-20 MeV

  • Becchetti, F.D.
  • Liu, W.Z.
  • Ashktorab, K.
  • Bajema, J.F.
  • Brown, J.A.
  • Janecke, J.W.
  • Roberts, D.A.
  • Kolata, J.J.
  • Lamkin, K.L.
  • Morsad, A.
  • Smith, R.J.
  • Kong, X.J.
  • Warner, R.E.
Publication Date
Jul 01, 1993
DOI: 10.1103/PhysRevC.48.308
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Elastic and inelastic scattering, one-nucleon transfers [mostly (8Li, Li7)] and the (8Li,α) fusion-evaporation reaction have been studied on a variety of targets (A=1–58) at E(8Li)≊13–20 MeV using the University of Michigan–University of Notre Dame radioactive nuclear beam (RNB) facility. The latter, which produces an energy-resolved (∼500 keV FWHM), focused beam with intensity ≳106 Li8/s, permitted measurements to selected nuclear levels with cross sections down to approximately 1 mb/sr. Based on the systematics of the measured Li8 elastic scattering an appropriate Li8 optical potential was deduced. Large inelastic scattering cross sections (and B[E2↑]) are observed for →88Li0.98*. Large cross sections are also observed for the (8Li,7Li) transfer reaction corresponding to quasielastic (viz., Q≊0) neutron transfer to selected high spin excited levels in the residual nucleus. The (8Li,α) fusion-evaporation reaction also appears to be significant and can produce very-high-energy α particles, viz., Eα≫Ebeam. Although observed using Li8, these features appear to be important for many RNB-induced reactions and they must be considered, for example, in nucleosyntheis calculations involving Li8 and other short-lived radioactive nuclei.

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