Measurement of Proton-Proton Bremsstrahlung at 389 MeV

Abstract

Proton-proton bremsstrahlung cross sections have been measured at 389 MeV incident energy. A two-arm spectrometer and a liquid hydrogen target system have been used to measure the proton-proton bremsstrahlung events with small background. At the present kinematical conditions, an enhancement of the cross sections due to the $\ensuremath{\Delta}$ current contribution is predicted. The measured cross sections are larger than the theoretical predictions including the $\ensuremath{\Delta}$ current contribution.