were performed at CERN in the 80's and 90's. However the antiproton data on medium-
heavy and heavy nuclear targets are scarce. The ASACUSA Collaboration at CERN has
measured the antiproton annihilation cross section on carbon at 5.3 MeV: the value is
(1.73±0.25) barn. The result is compared with the antineutron experimental data and with
the theoretical previsions.