BACKWARD SLOW PROTONS PRODUCTION IN THE INELASTIC INTERACTIONS OF LI-6 AND LI-7 NUCLEI WITH EMULSION NUCLEI AT DUBNA ENERGY

We report the experimental measurements on the multiplicity of slow ta rget associated particles, in the forward (theta(lab) less than or equ al to 90 degrees) and backward (theta(lab) > 90 degrees) hemispheres, and the different correlations between the backward slow protons and t he production of hadrons in both hemispheres in the interactions of Li -6(3.7 A GeV) and Li-7(2.2 A GeV) with emulsion nuclei. The study of t he number of backward slow protons (N-b(b) and N-g(b)) indicates that while the number of backward black particles, N-b(b) is a good factor representing the purely target fragments, the number of backward grey particles, N-g(b) can be considered as an accurate experimental Factor for the impact parameter dependence of the collision. It is also show n that the most central collisions are events having N-g(b) > 0 and N- s(b) > 0. We confront the data with a multiple scattering model incorp orating both binary cascading and evaporation of residual rlucleus. Th e model applies well in the region of limited cascading (backward hemi sphere). As for the forward hemisphere, where cascading becomes more b ranched, the model becomes less applicable.