  A Semi-classical model is employed to theoretically study mutual
neutralization in the collisions of $\mathrm{^4He^+}$ and $\mathrm{H^-}$. The
model includes nine covalent states of $\mathrm{^2\Sigma^+}$ symmetry. Here the
assumption is that only two states are interacting at a given internuclear
position. The reaction is studied for collisions energies below 100 $eV$. The
total mutual neutralisation cross section is computed and compared with
previous results
