2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/147981The problem of nuclear decays occurring due to the neutron-antineutron oscillation is analyzed in the optical potentil model and within the field-theoretic S-matrix approach. The result of the optical potential model is rederived within the field theoretic S-matrix approach. The neutron- antineutron oscillation in nuclei is suppressed drastically. We discuss an example for the spin precession of an atom in which analogous suppression takes place due to transparent physical reasons.one reference added, results of Ref.14 commentedHigh Energy Physics - PhenomenologyNuclear Theorytext