Proton-Proton Bremsstrahlung atEp=10MeV

A measurement of the proton-proton bremsstrahlung cross section at $E_p=10\mathrm{}$ MeV has been made. Two silicon surface-barrier detectors were placed in a hydrogen gas target at 30° on opposite sides of the beam axis. The energies of the two final-state protons and their time-of-flight difference were measured. $E_1-E_2$ spectra corresponding to events in the true and accidental regions of the time spectrum were obtained in off-line analysis. An upper limit of 0.42 ${\mathrm{\mu }\mathrm{b}/\mathrm{s}\mathrm{r}}^2$ has been established for the proton-proton bremsstrahlung cross section at $E_p=10\mathrm{}$ MeV, $\theta =30\mathrm{}°$.