Coherent? 0 photoproduction on12C,13C and16O in the? (1232) resonance region

Abstract

rc ~ photoproduction has been measured on ~2C, 13C and 160 in the A-resonance region.By limiting the acceptance of the rc ~ spectrometer to small angles (O.< 10~ only the coherent channel could contribute. The data show a broadening of the resonance width whereas the peak energy remains essentially unchanged. Theoretical calculations give considerably lower values compared with our data.