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Inclusive spectra of protons emitted in the interaction of 12 C-projectiles at an energy of 3.6 GeV/nucleon and C, Cu, Sn and Pb target nuclei were measured. The analysis of the experimental data suggests that in all these interactions the main contribution to proton cross sections in the investigated kinematic region is due to emission from a moving source with a rapidity which differs greatly from the target nucleus rapidity, y t , as well as from that of the effective fireball. The properties of this source such as the excitation energy depend only slightly on the combination of the colliding nuclei.
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Experimental data on angular distributions of secondaries in central interactions of carbon nuclei (4.5 GeV/c per nucleon) with copper and lead nuclei are given. Experiment was carried out on incident beam of synchrophasotron. Secondary particles are detected with counters. Angle between the axis of these counters and beam directions varies from 15 to 90 degrees. Target was oriented relative to the beam so, that absorption of particles in it escaping at an angle of 60 degrees may be minimum. This position does not change during measurements. Target thicknesses are the following: copper - 0.92 mm, lead -1.0 mm. At the 3-5% accuracy of measurements within 15-90 deg angle range to the beam direction no anomaly in angular distribution has been discovered which could serve as an evidence of shock wave appearance
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ADMIXTURE OF PROTONS WITH MOMENTUM > 550 MEV AND PIONS WITH MOMENTUM > 100 MEV IS ABOUT 15 PCT.