  We investigate projectile breakup effects on 6Li+209Bi elastic scattering
near the Coulomb barrier with the four-body version of the
continuum-discretized coupled-channel method (four-body CDCC). This is the
first application of four-body CDCC to 6Li elastic scattering. The elastic
scattering is well described by the p+n+4He+209Bi four-body model. We propose a
reasonable three-body model for describing the four-body scattering, clarifying
four-body dynamics of the elastic scattering.

Nuclear Theory