• R H Pratt

      Articles written in Pramana – Journal of Physics

    • Elastic scattering of 81 keVγ rays by aluminium, nickel, tantalum, gold and lead

      G Basavaraju P P Kane Lynn Kissel R H Pratt

      More Details Abstract Fulltext PDF

      A recently reported study [Phys. Rev.A49, 3664 (1994)] of elastic scattering of 81 keVγ rays in the angular range from 60° to 133° has been extended to smaller and larger angles. Previously reportedS matrix calculations of atomic Rayleigh scattering have been shown to require a subtraction of contributions from spurious resonances. Most of the experimental data are in agreement with the calculations. Calculations (MF + ASF) based on a combination of relativistic modified form factors (MF’s) and angle independent anomalous scattering factors (ASF’s) are found to be inadequate for an explanation of experimental cross-sections in the case of highZ elements at angles larger than about 120°.

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