Abstract
The elastic scattering of 122 and 245 keV γ-rays from a source containing 152Eu and 154Eu has been measured for scattering through 5°, 7° and 10° by targets of Al, Cu, Mo, Sn, Ta and Pb. The experimental cross sections have been normalized to theoretical cross sections for carbon. The results for 245 keV γ-rays have been obtained using a least-squares fit of the overlapping elastic and Compton peaks, whereas the results for 122 keV γ-rays have been obtained by a subtraction method using theoretical Compton cross sections. The experimental elastic cross sections are in very good agreement (to better than 5%) with the theoretical calculations of Kane et al. [Phys. Rep. 140 (1986) 75] and provide strong support for the calculational scheme of Kissell and Pratt [Phys. Rev. A22 (1980) 1970] for the evaluation of total atom Rayleigh scattering in the regime where there are significant contributions from outer electron shells.
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