2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/41842In the presented paper curves of constant $ε_{T} / n_{charged}$ are calculated in $T-μ_{B}$ plane, in the framework of a single-freeze-out thermal hadron gas model. The ratio is a theoretical equivalent of ${dE_{T} \over {dη}}_{\mid η=0} / {dN_{ch} \over {dη}}_{\mid η=0}$ measured at RHIC and SPS. In both $ε_{T}$ and $n_{charged}$ decays of hadron resonances are taken into account. The freeze-out temperature $T_{f.o.}=156_{-11}^{+14}$ MeV is obtained for RHIC, whereas $T_{f.o.}=134-140$ MeV is evaluated for SPS.Revtex, 3 figures (included), 5 pages, conclusions concerning AGS have been withdrawnHigh Energy Physics - Phenomenologytext