M. Zinser et al., STUDY OF THE UNSTABLE NUCLEUS LI-10 IN STRIPPING REACTIONS OF THE RADIOACTIVE PROJECTILES BE-11 AND LI-11, Physical review letters, 75(9), 1995, pp. 1719-1722
Reactions of the halo systems Be-11 and Li-11 (at 460 and 280 MeV/nucl
eon) with a carbon target demonstrate that (n + Li-9) has an (unbound)
l = 0 ground state very close to the threshold. The neutron halo of L
i-11 has appreciable (1s(1/2))(2) and (0p(1/2))(2) components.