[en] In the plane-wave pulse approximation cross sections and asymmetry in distributions of ⁷He(γ, p)³H and ⁴He(γ, n)³He reaction products with polarized photons of intermediate energies (Ksub(γ)=40-140 MeV) are calculated. In calculations along with the mechanism of direct knocking-out of nucleons the contribution of the so called recoil diagram caused by antisymmetry effects of final state wave functions is considered. It has been assumed that the ⁴He, ⁵He and ³H wave functions are spatially-symmetric corresponding to S-wave states of nucleons of oscillator model while the electromagnetic transition operator comprises only convection current and magnetic interaction. It is shown that recoil mechanism results in appearance of asymmetry in neutron distributions compared by value with proton asymmetry