Searching for interesting variables which contains information about the compression stage of a relativistic A + A collision, the concept of "nuclear matter jets" is an interesting tool for selecting different event structures as : single-jet events, two-jet events, three-jet events, and non-jet events. We found a relation between the number of jets and the centrality of the collision. The analysis of the jet properties allowed us to make assumptions about their origin. The founded jets in these interactions have a hadronic origin and not a partonic one.