Computation of absorptive form factors for high-energy electron diffraction

An efficient procedure for calculating the contribution of the thermal diffuse scattering to the absorptive form factor is outlined. For an isotropic Einstein model all integrations could be performed analytically by using suitable functions to fit the elastic electron scattering amplitudes. The result is cast into a function subroutine which is available upon request. Computed values are compared with previous calculations and with measurements.