Elastic Scattering of 1.6-Mev Gamma Rays from H, Li, C, and Al Nuclei

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Abstract
The elastic scattering of 1.6-Mev gamma rays from H, Li, C, and Al has been measured at an angle of 124^\circ\else\textdegree\fi{}. The ratios of the measured differential cross sections to the classical Thomson differential cross sections are 0.94\pm\else\textpm\fi{}0.16 for H, 0.92\pm\else\textpm\fi{}0.10 for Li, 1.06\pm\else\textpm\fi{}0.10 for C, and 1.15\pm\else\textpm\fi{}0.10 for Al. These results agree with the field-theory prediction that in the low photon-energy limit the cross section must approach the classical Thomson cross section.

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