  In this paper we solve the equation for nucleus-nucleus scattering in the
BFKL Pomeron calculus, suggested by Braun. We find these solutions analytically
at high energies as well as numerically in the entire region of energies inside
the saturation region. The semi-classical approximation is used to select out
the infinite set of the parasite solutions. The nucleus-nucleus cross sections
at high energy are estimated and compared with the Glauber-Gribov approach. It
turns out that the exact formula gives the estimates that are very close to the
ones based on Glauber-Gribov formula which is important for the practical
applications
