Izmereniya (Sigma)-asimmetrii reaktsii (sup 3)He((gamma),p)(sup 2)H i (sup 4)He((gamma),p)(sup 3)H v myagkoj chasti spektra fotonov. (Measurement of Sigma-asymmetry in reactions (sup 3)He(gamma,p)(sup 2)H and (sup 4)He(gamma,p) in soft range of photon spectra).