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88-Mev Gamma-Ray Cross Sections
Phys. Rev. 75, 433 – Published 1 February, 1949
DOI: https://doi.org/10.1103/PhysRev.75.433
Abstract
Total cross sections for 88-Mev gamma-rays have been measured in 6 elements by absorption methods to a statistical accuracy of about 1.5 percent. The results expressed in /gram are 0.0107, 0.0252, 0.0471, 0.0665, 0.0909, and 0.0973 for the elements Be, Al, Cu, Sn, Pb, and U, respectively. Values appear generally lower than predictions of existing theory by a factor proportional to .
Ratios of pair formation cross sections in different elements have been obtained in a few cases; these data can be used together with the total cross section to obtain non-pair cross sections (presumably Compton scattering). The cross section so obtained at 88 Mev agrees within the experimental accuracy of about 15 percent with the Klein-Nishina prediction for Compton scattering.
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