The method of checking T-invariance in NN collisions by means of a polarized target

In an NN-scattering experiments the T-invariance principle usually tested by testing the famous ''Polarization-Asymmetry'' equation. The author points out that there is one more relatively simple technique to test it. For this purpose one must measure the spin asymmetry of the differential cross section for NN-scattering polarized beam by polarized nucleons of target choosing special spin orientations of nucleons with regard to the scattering plane. The relation between the spin asymmetry and the matrix of NN-scattering is found