  The contribution of the final-state interaction to the differential
cross-section of deuteron photodisintegration at laboratory photon energies
below 50 MeV is analyzed in the framework of Bethe-Salpeter formalism with a
phenomenological rank-one separable interaction. The approximations made are
the neglect of two-body exchange currents, negative-energy components of the
bound-state vertex function and the scattering T matrix. It has been found that
the gross effect of the final-state interaction with J=0,1 comes from the net
contributions of the spin-triplet final states and spin-singlet (1S0+)-state.
The relativistic results are compared with the nonrelativistic ones in every
partial-wave channel. It is found that the relativistic effects change the
magnitude of the final-state interaction from several percent to several tens
of percent.
