CORRELATIONS OF SECONDARY PARTICLES IN INTERACTIONS OF 16 O NUCLEI IN PHOTOEMULSION AT ENERGY 3.7 GeV PER NUCLEON

This work presents the multiplicity correlations of secondary charged particles produced in interactions of O nuclei with photoemulsion nuclei at energy 3.7 GeV per nucleon. The dependence of the correlations on the centrality of interaction and also on the energy and on the mass number of primary nuclei has been studied. Obtained results have been compared with calculations from cascade – evaporation model. At first the correlation dependences between every two kinds of secondary particles were studied. These dependences can be approximated by a linear function in the statistical limited range of experimental values. The best fits are summarized in a table. The experimental dependence of Ns on Nh has the characteristic behaviour with plateau at 4  Nh  8, which consists mainly the collisions of oxygen nuclei O with a light nuclei of photoemulsion (C, N, O), especially with carbon nuclei. The average multiplicity values of slow target fragments Nb depend strongly on the number of recoil protons up to the values Ng  13 with the following saturation at higher Ng. In the experimental dependences of average multiplicities Ng and Nb on Nh it was observed that in a region Nh  20 the values of Ng are like the values of Nb, i. e. the fast and the slow target fragments contribute to the production of h – particles by equivalent rate, but the contribution of fast target fragments (g – particles) predominates at upper numbers of Nh. Also the correlation between the average multiplicity values Ni and the summary charge Q of the noninteracting fragments of primary nucleus has been investigated. Used model describes the studied characteristics of secondary particles qualitatively.