New aspects in the study on the meson photoproduction processes on nuclei

The π-meson photoproduction in the nuclear reaction γ+A→π+B^*, B^*→γ^′+B is studied. Recoil nuclei polarization is investigated from measurements of the reaction cross sections. Angular anisotropy of γ-transitions in nuclei gives information on the amplitude of the γ+N→π(K)+N process. The πγ^′ -coincidence technique is to be applied to experimental study of two-stage photoproduction reactions. Evaluation of the πγ^′ -coincidence for the reaction yields on ¹⁰B, ¹²C, ¹⁵N has shown that the experiment can be conducted at the Pakhra accelerator (Troitsk, Russia) and at the MAMI II accelerator (Meinz, Germany). πγ^′-Coincidence yields on a bremsstrahlung beam of the Pakhra accelerator are evidently comparable with the yields on a tagged photon beam of the MAMI II accelerator.