2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39410We consider an ideal gas of massive hadrons in thermal and chemical equilibrium. The finite-size gas expands longitudinally in accordance with Bjorken law. Also the transverse expansion in a form of the rarefaction wave is considered. We show that J/Psi suppression in such an environment, when combined with the disintegration in nuclear matter, agrees qualitatively well with NA38 and NA50 data.11 pages, revtex, 10 figuresHigh Energy Physics - Phenomenologytext