Apply quantum mechanical corrections to ion scattering calculations in semiconductors when the basic Brooks-Herring approximation fails. Use when: (1) Born approximation condition |k|λ_D > 1 is not satisfied, (2) coherent multiple scattering occurs from multiple ions, or (3) chemical individuality of scattering centers significantly affects scattering probability. Applicable for ion densities between 10^16 to 10^19 cm^-3.