The averaging over a small angular range involved in the measurement of "180° excitation functions" for heavy-ion scattering is shown to have a drastic effect on the energy dependence of the backward-angle cross sections. A simple analytic method is described by which the measured data can be de-averaged to determine the "true" 180° excitation functions.

NUCLEAR REACTIONS 180° excitation functions for heavy-ion scattering; effects of and corrections for angle averaging.

• Received 2 February 1982

DOI:https://doi.org/10.1103/PhysRevC.25.2862