Baryon rapidity distribution in nucleus-nucleus collisions at ultrarelativistic energies

The baryon rapidity (or pseudorapidity) distributions in nucleus-nucleus collisions in the SPS energy region have been described by the thermalized cylinder picture. The calculated results are in agreement with the experimental data of the reactions ${}^{32}\mathrm{S}+\mathrm{S}$ at $200A\mathrm{GeV},$ ${}^{16}\mathrm{O}+\mathrm{A}\mathrm{u},\mathrm{}\mathrm{Ag},$ Cu at 60 and $200A\hspace{0.5em}\mathrm{GeV}$ bombarding energy. The limiting fragmentation of the target spectator is achieved for a given projectile in the concerned energy region.