The near-barrier and sub-barrier fusion
of light unstable nuclei and their respective stable isotopes
with heavy targets (4,6He+209Bi, 4,6He+238U, 9,11Be+209Bi
and 9Be+208Pb) is investigated via coupled channel calculations.
The entrance channel
optical potential is generated via a microscopic
BDM3Y1 interaction. A
rather satisfactory description of the experimental data was
obtained under the
condition that the real part of the optical potential
is reduced for the weakly bound and halo systems.
This reduction proves to be the
fundamental difference in treating stable and weakly bound nuclei,
and can be attributed to the loss of a flux due to breakup effects. |
