Two-body photodisintegration ofHe3between 150 and 350 MeV

Differential cross sections for ${}_{}{}^3{}_{}{}^{}\mathrm{He}(\gamma , \mathrm{d}){}_{}{}^1{}_{}{}^{}\mathrm{H}$ for incident energies between 150 and 350 MeV at center-of-mass proton angles near 60° and 90° have been measured with an absolute uncertainty of less than 6%. The experiment used a single-arm spectrometer, a gas target, and an uncollimated bremsstrahlung beam. The results are in good agreement with new measurements of the time-reversed reaction, ${}_{}{}^2{}_{}{}^{}\mathrm{H}(\mathrm{p}, {}_{}{}^3{}_{}{}^{}\mathrm{He})\gamma$, giving no evidence for a violation of time-reversal invariance. The differential cross sections decrease smoothly with energy and show only a small contribution from the $\Delta \mathrm{}\left(1232\right)\mathrm{}$ resonance.