AbstractA two‐phase model of nuclear matter and quark gluon plasma is presented. Nucleon‐nucleon interaction is treated by the mean field theory while the pion‐nucleon interaction is taken into account explicitly by using the spectrum of pionic excitations in nuclear matter. Interactions in the quark‐gluon plasma are included by first‐order corrections to the bag model equation of state. We find large pionic excitations near the constructed phase border line in the fragmentati