The reaction 11Li(p,t)
9Li(gs) at an incident energy of 4 MeV is treated in terms
of a simplistic distorted-wave Born approximation transfer. The halo neutrons involved in the
reaction are treated as a di-neutron cluster transferred in a simultaneous process. This appears
to be a good approximation of the mechanism. The dominant contribution to the reaction comes
from the known (1s1/2)
2
structure component of the ground state of 11Li, and the cross section
angular distribution seems to be relatively insensitive to the fact that 11Li has an anomalously
large radius due to its Borromean halo properties. Significantly this simple treatment of the
reaction is in much better agreement with the experimental angular distribution than a more
sophisticated calculation.