Measurements of the reaction cross sections for ∼70 MeV (laboratory kinetic energy) antiprotons on lead and carbon are presented. Although lacking great statistical authority, the large observed cross sections suggest that the low energy reaction cross sections increase rapidly at lower energies above the Coulomb barrier.

[NUCLEAR REACTIONS 72 ± 10 MeV $\overline{\mathrm{p}}$ annihilation cross section on C, Pb.]

• Received 19 September 1983

DOI:https://doi.org/10.1103/PhysRevC.29.332