Threshold photoproduction of charged pions on ¹⁴N

Abstract

Pion photoproduction processes ¹⁴N_gs(γ, π⁺)¹⁴C and¹⁴N_gs(γ, π^-)¹⁴O have been studied in the threshold region. These processes provide an excellent tool to study the corrections to soft pion theorems and Kroll-Ruderman limit as applied to nuclear processes. The agreement with the available experimental data for these processes is better with the empirical wave functions while the shell-model wave functions predict a much higher value. Detailed experimental studies of these reactions at threshold, it is shown, are expected to lead to a better understanding of the shell-model inputs and radial distributions in the 1p state.