Search for exotic systems formed in nuclear reactions with heavy ions

We study the feasibility of an experimental observation of toroidal and bubble breakup configurations in Au+Au collisions at 15 MeV/ nucleon. We have constructed the Monte-Carlo simulation code ETNA. This code allows us to simulate the decay of the composite system assuming exotic breakup configurations. We present the current status of the reaction simutation. In order to disentangle between different break-up geometries, six observables were tested. The predictions of simulations are discussed.