An alternative, to the commonly used blast-wave, model describing the freeze-out hypersurface is applied to fit the $p_{ T}$-spectra of identified hadrons measured at relativistic heavy-ion collisions at $\sqrt{ s_{ NN}}=62.4, 130$ and 200 GeV. Decays of resonances are taken into account completely. It has turned out that the fitted freeze-out temperature and baryon number chemical potential depend weakly on the centrality of the collision and their values are close to the chemical freeze-out values determined from fits to particle yield ratios.
Categories: nucl-th