π+photoproduction near threshold onHe3

The positive-pion photoproduction yield on ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ was measured near threshold. The transition matrix element of this process is extracted with a ± 1.5% accuracy. We discuss the relation of our result, firstly, with magnetic electron scattering on ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ and ${}_{}{}^3{}_{}{}^{}\mathrm{H}$, secondly, with the properties of pionic ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ atom.