2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/197653Within a transport code of BUU type the production of phi-mesons in the reactions Ni+Ni at 1.93 AGeV and Ru+Ru at 1.69 AGeV is studied. New elementary reaction channels rho+N(Delta) to phi+N and pi+N(1520) to phi+N are included. In spite of a substantial increase of the ϕmultiplicities by these channels the results stay below the tentative numbers extracted from experimental data.17 pages(LaTeX), two new figures addedNuclear Theorytext