Abstract
We have investigated the electromagnetic (Bethe-Heitler) process of the formation of a pair of neutral baryons of spin 1/2 by a photon in the field of a nucleus possessing electric quadrupole and magnetic dipole and octupole moments. The cross section for photoproduction of neutron-antineutron pairs has been found as a function of the electric (Ze, Q) and magnetic (μI, Ω) multipole moments of the target nucleus. The angular distribution and energy spectrum of the neutron of the pair produced have been studied for9Be,12C, and40Ca nuclei.
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