Binding Energies and Scattering Observables in the 4Helium3 Atomic   System
  The 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. 
A. K. Motovilov, W. Sandhas, S. A. Sofianos, E. A. Kolganova