γn→π−pprocess inHe4andO16

Nuclear transparencies for the fundamental process γn→${\mathrm{\pi }}^{\mathrm{-}}$p on ${}_{}{}^4{}_{}{}^{}\mathrm{He}$ and ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ have been calculated using nucleon configurations obtained from realistic ground-state wave functions by the Monte Carlo method. Comparisons between nuclear transparency results using nucleon configurations and the correlated Glauber approximation are made in the case of (e,${\mathit{e}}^{\prime }$p) on ${}_{}{}^4{}_{}{}^{}\mathrm{He}$ and ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$. Furthermore, nuclear transparencies for the γn→${\mathrm{\pi }}^{\mathrm{-}}$p and (e,${\mathit{e}}^{\prime }$p) processes have been calculated including a color transparency effect. © 1996 The American Physical Society.