2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/82119The matrix elements of the zero-range $δ$-force and the finite range Gogny-type pairing force are compared. The strengths of the $δ$-interaction for rare-earth nuclei are adjusted. Pairing gaps resulting from different pairing interactions are compared to experimental ones.8 pages, LaTeX-2e, 4 figures; submitted to Acta Physica Polonica BNuclear Theorytext