Differential cross sections for the reactions ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$(γ,${\pi }^{+}$${)\mathrm{}}^{10}$Be ${}_{\mathrm{}(\mathrm{g}.\mathrm{s}.\mathrm{})\mathrm{}}{}^{}{}_{}{}^{}$ and ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$(γ,${\pi }^{+}$${)\mathrm{}}^{10}$Be ${}_{\mathrm{}\left(1\mathrm{s}\mathrm{t}\right)\mathrm{}}{}^{}{}_{}{}^{}$ have been deduced from measured electroproduction yields at $E_{\mathrm{e}=185\mathrm{}}$ MeV and ${\mathrm{theta}}_{\pi }$=30?(de–150°. The experimental results are compared with a calculation made in distorted wave impulse approximation. Substantial discrepancies between the theory and the experiment are observed.

• Received 17 March 1986

DOI:https://doi.org/10.1103/PhysRevC.34.1123