Multiplicity of particles per primary reaction at 1500Â MeV for the nuclei used on the accelerator-driven systems

► We estimated multiplicities of particles in collision of 1500 MeV proton. ► We used the CEM model, INC model and Evaporation model. ► The particle multiplicities are nearly constant as the mass number-A increases. ► Particle-particle interactions are dominant in the high-energy particles. ► Conversion to the stabil state by gamma emitting is more probable.