Selection of T-violating amplitude at neutron transmission by oscillating field method

It is proposed in the frame of Ramsey's method to register two-dimensional, depending from neutron phase and neutron energy, spectrum for measurement P,T-violating amplitudes of interaction of the polarized neutrons with the polarized 139La nuclei in area of p-wave resonance. The form of phase spectrum and corresponding expressions for the asymmetries are obtained on the basis of formalism of a spin density matrix. It was shown that the ratio of the P,T-violating to P-violating imaginary amplitudes can be obtained from the measurements of neutron phase spectrum with polarized and unpolarized 139La target. (author)