Abstract

Scattering cross sections differential with respect to both the scattering angle and the energy of the scattered photons are derived in the impulse approximation for Al, Cu, Sn and Pb in the energy region 17.44≤ E≤39.91 keV at an angle of 90°. Double differential scattering cross sections are evaluated using nonrelativistic and relativistic expressions based on impulse approximation. The difference between the two expressions is less than 1%, in the important interval P z ≤3 (a.u). With monoenergetic radiation the influence of scattering geometry on the energy broadening is evaluated with respect to the accepted scattering angles and the incident photon energy.

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