Corrections to the well-known statistical sum rule that relates the summed transmission coefficients on the one hand, and 2π${\Gamma }_{\mathrm{CN}{\rho }_{\mathrm{CN}}}$ on the other, in the context of the statistical decay properties of nuclear giant resonances, are discussed. These corrections arise both from preequilibrium processes as well as from the giant resonance itself. It is shown that the compound nucleus average width is reduced as a result of these corrections.

• Received 24 February 1987

DOI:https://doi.org/10.1103/PhysRevC.37.2332