2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/98002The 4He3 system is investigated using a hard-core version of the Faddeev differential equations and realistic 4He-4He interactions. We calculate the binding energies of the 4He trimer but concentrate in particular on scattering observables. The atom-diatom scattering lengths are calculated as well as the atom-diatom phase shifts for center of mass energies up to 2.45 mK.LaTeX, 3 pages, 1 figure; Contribution to Proceedings of 16th International Conference on Few-Body Problems in Physics, 6-10 March 2000, Taipei, TaiwanAtomic and Molecular ClustersChemical Physicstext