The continuum structure of the Borromean halo nucleus Li-11

摘要

We solve the Faddeev equations for Li-11 (n + n + Li-9) using hyperspherical coordinates and analytical expressions for distances much larger than the effective ranges of the interactions. The lowest resonances are found at 0.65 MeV (1/2(+),3/2(+),5/2(+)) and 0.89 MeV (3/2(+/-)) with widths of about 0.35 MeV. A number of higher-lying broader resonances are also obtained: The dipole strength function and the Coulomb dissociation cross section are also calculated. (C) 1998 Elsevier Science B.V. [References: 23]