Measurement of coherent plus incoherent differential scattering cross section of 59.54 keV γ-rays from anthracene and POPOP

Absolute values of coherent plus incoherent differential scattering cross sections of 59.54 keV γ-rays of 241Am from Anthracene (C14H10) and POPOP (C24H16N2O2), both used as detector materials, were experimentally determined for 10 scattering angles between 30° and 120°. The corresponding theoretical differential cross sections were calculated by means of form factors and incoherent scattering functions. A comparison between the experimentally determined results and the theoretically calculated values shows a good agreement, when the theoretical calculation of the atomic form factors and incoherent scattering functions were based on the summation of the individual form factors and incoherent scattering functions of their constituent elements in the molecule according to the number of atoms in the molecule.