The quasielastic scattering of the exotic neutron-drip-line nucleus Be
-14 on a C-12 target has been studied at an incident energy of 796 MeV
, and compared with that of the Be-12 ''core'' at the same energy per
nucleon. Evidence is presented that the phenomenological optical-model
potential for the former system requires an attractive real surface t
erm, as well as the ''expected'' surface imaginary term, in order to r
eproduce the experimental angular distribution.