SCATTERING OF FERMIONS OFF DILATON BLACK-HOLES

We discuss how various properties of dilaton black holes depend on the dilaton coupling constant a. In particular we investigate the a-depen dence of certain mass parameters both outside and in the extremal limi t and discuss their relation to thermodynamical quantities. To further illuminate the role of the coupling constant a we look at a massless point particle in a dilaton black hole geometry as well as the scatter ing of (neutral) fermions. In this latter case we find that the scatte ring potential vanishes for the zero angular momentum mode which seems to indicate a catastrophic deradiation when a > 1.