PHOTOPRODUCTION OF NEGATIVE PIONS ON N-15 USING E-GAMMA-SIMILAR-OR-EQUAL-TO-184 MEV TAGGED PHOTONS

The differential cross sections of the N-15(gamma, pi(-))O-15(g.s.) re action were measured at theta(pi) = 45, 60, 80, and 100 degrees with t agged photons at the Saskatchewan Accelerator Laboratory. Pions from a N-15 target and a CH2 target were measured with two range-telescope s ystems. The measured differential cross sections were compared with se veral DWIA (Distorted Wave Impulse Approximation) calculations to see the effect of the nuclear structure of the ground state of A=15 nuclei . Unlike the C-13(gamma, pi(-))N-13(g.s.) reaction, E0 suppression was not observed in this reaction.