Scattering of 1.1732- and 1.3325-MeV gamma rays through small angles by carbon, aluminum, copper, tin, and lead
1983; American Institute of Physics; Volume: 28; Issue: 3 Linguagem: Inglês
10.1103/physreva.28.1509
ISSN0556-2791
AutoresP.P. Kane, J. Mahajani, G. Basavaraju, A. K. Priyadarsini,
Tópico(s)X-ray Spectroscopy and Fluorescence Analysis
ResumoWith the help of Ge(Li) detectors, elastic and Compton scattering cross sections of copper, tin, and lead were determined in the double-shadow-cone geometry from 4.51\ifmmode^\circ\else\textdegree\fi{} to 12.05\ifmmode^\circ\else\textdegree\fi{} in the case of 1.1732- and 1.3325-MeV $\ensuremath{\gamma}$ rays of $^{60}\mathrm{Co}$. A new method was developed for the accurate measurement of cross sections. The measured elastic scattering cross sections are determined predominantly by Rayleigh scattering from bound atomic electrons. The nuclear Thomson and the Delbr\"uck scattering amplitudes have also been considered in the interpretation of data. The relativistic modified form-factor theory of Rayleigh scattering leads to good agreement with the data for $x 4.5$ ${\mathrm{\AA{}}}^{\ensuremath{-}1}$ are in agreement with those calculated on the basis of tabulated nonrelativistic incoherent scattering functions, although there are deviations at smaller $x$ values.
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