Estimation of the cross sections and asymmetry ratios for the γd → nnπ+ and γp → nπ+ reactions in the first resonance region

The ratio of cross sections of the γd → nnπ+ and γp → nπ+ reactions in the first resonance region has been estimated in the fullness approximation for the case of non-polarized photons, the ratio of assymetries in the corresponding reactions with polarized γ quanta being also estimated. It follows from the experimental data analysis that the influence of the deuteron D-wave is small as a whole, though while taking it into account, the assymetry ratio may change for the value of an order of the experimental errors