ABSTRACT
The ability to annihilate in nuclear matter is a peculiar property of antinucleons. It is well known that the absorption of an antiproton takes place in the "atmosphere" of a nucleus through the annihilation on a quasifree nucleon. In this case, the annihilation serves as a source of pions. A part of annihilating pions can fly simultaneously into the nucleus consisting of A-l nucleons. Charges of pions produced depend on whether the annihilation has taken place on a proton or a neutron. The INC-model turned out to be rather effective for the description of the annihilation of intermediate-energy antinucleons on nuclei as well. A wide range of experimental data can be described under the assumption that an antinucleon annihilates on an intranuclear nucleon, if we take into consideration the effects characteristic of the processes which involve a large number of particles.
