The break-up of an antideuteron in a Coulomb nuclear field, which results in escape of an antineutron and the formation of an antiproton atom, is examined. In calculating the probability of Coulomb break-up, all of the orbits of the antiproton were considered, including even the noncircular orbits. A convolution type optical potential is built to describe the competing process of absorption of the antideuteron by the nucleus. It is discovered that the Coulomb break-up dominates over strong absorption for nuclei with any values of Z.
Research Institute of Nuclear Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia