Multiplicities and continuum γ-rays following heavy-ion reactions

The continuous γ-ray spectrum following (HI, xn) reactions is analyzed in terms of the competition between collective (rotational) and non-collective (statistical) modes of de-excitation at high spin. The dependence of the γ-ray intensity and of the multiplicity upon the parameters that define the rotational and the statistical modes is studied in an application of the model to the reaction 176Yb(12C, 8n)180Os at 120 MeV. It is found that competition may be relevant throughout a rather large energy interval. (Auth.)