Central interactions of oxygen nuclei on emulsion heavy nuclei at energy 200 GeV per nucleon

Central interactions of 16O oxygen nuclei on Ag and Br photoemulsion heavy nuclei obtained during horizontal irradiation of photoemulsion layers are studied. Data on charged particle multiplicity, angular characteristics of secondary relativistic particles of central intractions are presented. High density of prticles (60-75) in the central part, availability of substructures and high particle density fluctuations on the basis of pseudorate is observed. Sum energy of newly produced particles for these events constitutes 0.7-0.75 from the primary one. It is supposed that these features are due to new fenomena in nucleus-nuclear interactions and, probably, due to quark-gluon plasma production. 2 refs.; 6 figs.; 2 tabs