Adiabatic approximation of the resonating-group method for subbarrier elastic scattering of loosely bound particles

In order to explain irregularities observed in the angular distributions of elastic 6He scattering on 208Pb at subbarrier energies of Elab=14 and 16 MeV by the dynamical polarization of the 6He projectile in the strong Coulomb field of the target nucleus, a method has been proposed for calculating the Coulomb polarization potential on the basis of the adiabatic approximation of the resonating-group method. It has been shown that data cannot be satisfactorily reproduced with the potential computed in this way. In all probability, the observed effects are caused by a strong coupling between the elastic-scattering channel and the channels featuring the excitation of the lowest 2+ and 1- states of the 6He nucleus