Charged pion photoproduction fromB10

Abstract

Measurements were made of $\frac{d\ensuremath{\sigma}}{d\ensuremath{\Omega}}$ [${\ensuremath{\theta}}_{\ensuremath{\pi}}=90\ifmmode^\circ\else\textdegree\fi{}(\mathrm{lab})$] for $^{10}\mathrm{B}$($\ensuremath{\gamma},{\ensuremath{\pi}}^{+}$)$^{10}\mathrm{Be}$ (g.s.) at ${T}_{\ensuremath{\pi}}=17, 29, \mathrm{and} 42$ MeV, for $^{10}\mathrm{B}$($\ensuremath{\gamma},{\ensuremath{\pi}}^{+}$)$^{10}\mathrm{Be}$ (${E}_{x}=3.37$ MeV) at ${T}_{\ensuremath{\pi}}=29 \mathrm{and} 42$ MeV, and for $^{10}\mathrm{B}$($\ensuremath{\gamma},{\ensuremath{\pi}}^{\ensuremath{-}}$)$^{10}\mathrm{C}$ (g.s.) at ${T}_{\ensuremath{\pi}}=29$ MeV. The results disagree significantly with several recent distorted-wave impulse approximation calculations.NUCLEAR REACTIONS $^{10}\mathrm{B}$($\ensuremath{\gamma},{\ensuremath{\pi}}^{+}$)$^{10}\mathrm{Be}$ (${E}_{x}=0, 3.37$ MeV), $^{10}\mathrm{B}(\ensuremath{\gamma},{\ensuremath{\pi}}^{\ensuremath{-}})^{10}\mathrm{C}({E}_{x}=0)$, ${\ensuremath{\theta}}_{\ensuremath{\pi}}=90\ifmmode^\circ\else\textdegree\fi{}$ (lab), ${E}_{\ensuremath{\pi}}=17, 29, 42$ MeV, measured $\frac{d\ensuremath{\sigma}}{d\ensuremath{\Omega}}$, compared with DWIA calculations.