For separable, coupled-channel model interactions we show how to construct energy-independent optical potentials, $\overline{U}$. The elastic phase shifts and nuclear wave functions obtained from $\overline{U}$ are identical at all energies with those of the conventional energy-dependent optical potential $U\left(E\right)\mathrm{}$. Whenever there is strong absorption or a compound resonance $\overline{U}$ has an extremely rapid variation with momentum.

NUCLEAR REACTIONS Energy-independent optical potentials. Separable interaction model; compare momentum dependence of conventional and energy-independent optical potentials; compare with phase-shift-equivalent potentials.

• Received 3 August 1981

DOI:https://doi.org/10.1103/PhysRevC.25.46