Proton-proton bremsstrahlung at 200 MeV

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Abstract
The coplanar symmetric proton-proton bremsstrahlung cross section at 16.4° and 200 MeV incident proton energy has been measured. The data are compared with four theoretical calculations, and sizable discrepancies are found. The data are in better agreement with a soft photon calculation than with predictions based on the Hamada-Johnston or the Reid soft-core potential models. The differences between the realistic potential model calculations and the data do not seem to be entirely explained by reasonable variations of the off-shell behavior of the model potentials.