Wide-Angle Bremsstrahlung

Abstract

We have measured the bremsstrahlung yield at 6.2° in the reaction $e^{-}+\mathrm{C}\to e^{-}+\mathrm{C}+\gamma$ using incident-electron energies up to 9.5 GeV. The data confirm the predictions of quantum electrodynamics for timelike electron four-momenta up to 1 GeV.