Since the prediction of the Quark Gluon Plasma, a new phase of matter, more than a decade ago, significant amounts of research has been dedicated to the study of relativistic nucleus-nucleus and hadrons-nucleus collisions. In this article we have focused our study on the emission feature of shower, grey and black particles emerged from the interactivity of \(^{84}Kr\) with different target nuclei of emulsion. We have studied average multiplicity of shower, grey and black particles as well as their dependence on mass of projectile and target nuclei. The results of the experiments indicate that the average multiplicity of black particles is roughly constant, while the average multiplicity of shower and grey particles rises with projectile mass ( \(A_{p}\) ). The results were also compared with calculated values obtained from multisource thermal model and found to be consistent. We have also studied the normalized multiplicity distribution of shower, grey and black particles. The data were also compared with other available experimental observations and the calculated values obtained from the multisource thermal model. The observation shows that the emission feature of shower, grey and black particles were well explained by multisource thermal model.
