2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/106516We present results on the scattering lengths of ^4He--^4He_2 and ^3He--^4He_2 collisions. We also study the consequence of varying the coupling constant of the atom-atom interaction.Contribution to Proceedings of the International Workshop ``Critical Stability of Few-Body Quantum Systems'' (Dresden, October 17--22, 2005)Atomic and Molecular Clusterstext