Electromagnetic Dipole Response as a Test of the ${}^{11}$Li g.s. Structure and the n-${}^9$Li Interaction

Abstract

The electric dipole response of the halo nucleus ${}^{11}$Li is calculated in a hyperspherical three-body formulation, and is studied as a function of the interaction employed for $n{-}^9$Li to reflect the Pauli principle. Strength concentrations at lower energies are found but no narrow resonances. Only one possible scenario of ${}^{11}$Li structure is in close correspondence with MSU and RIKEN experimental data.

Comments: 9 A4 pages, Latex with psfig, Surrey preprint CNPR93/2