  Fusion reactions with a weakly bound projectile are studied using the
double-folding model along with a repulsive interaction modifying term. Using
this modified potential, including nuclear matter incompressibility effects,
the fusion reaction cross sections and suppression parameters are calculated
for 9Be +209Bi,208Pb,29Si and 27Al reactions. The results show that applying
these effects at energies near the Coulomb barrier improves the agreement
between the calculated and experimental cross sections, and modifies the mean
values of the suppression parameter.
