2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/82801Scattering lengths for d-d, n-$^3$He and p-$^3$H systems are computed via Cluster Reduction Method for Yakubovsky equations in configuration space taking into account Coulomb interaction between protons. MT I-III potential model was used to describe the nucleon-nucleon interaction. Results of calculations are in a good agreement with existing experimental data and results of calculations of other authors.LaTeX, 5 pages. Contribution to XV International Conference on Few-Body problem in Physics, Groningen, the Netherlands, 22--26 July 1997Nuclear Theorytext