To date, the possible effects of coupling to
nucleon transfer reactions on the elastic
scattering and fusion of weakly bound exotic
nuclei have been largely neglected. The 15C
nucleus presents a virtually unique opportunity to
test these effects for an almost pure s1/2 single
neutron halo nucleus. We present a series of
coupled reaction channels calculations of the
sub-barrier elastic scattering and single neutron
transfer reactions, plus near-barrier excitation
functions of the total fusion cross section for
the 12C, 13C and 15C + 208Pb systems. The method
is validated against data for 12C and 13C + 208Pb.
A large effect on the sub-barrier elastic
scattering due to coupling to the (15C,14C) single
neutron stripping reaction is found, ascribed to
the 2s1/2 halo nature of the 15C ground state, in
contrast to the two stable Carbon isotopes. We
also find a significant diminution of the above
barrier total fusion cross section for 15C due
to this coupling, again in contrast to the stable
isotopes. |
