Darmstadt 2008 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 20: Physik mit schweren Ionen

HK 20.6: Talk

Tuesday, March 11, 2008, 10:00–10:15, 2E

Fragment formation in low energy proton-induced reactions within a hybrid BUU+SMM approach — •Theodoros Gaitanos, Horst Lenske, and Ulrich Mosel — Institut für Theoretische Physik, Universität Gießen

The formation of fragments in proton-induced reactions at low relativistic energies is investigated within a combination of a covariant dynamical transport model of a Boltzmann type (GiBUU) and a statistical approach (SMM). The GiBUU model describes the dynamics of the pre-equilibrium stage leading an intermediate configuration, which is characterized by the mass and charge numbers and the excitation energy. The excited system finally undergoes statistical fragmentation according to the SMM model. We discuss in detail the reliability and possible limitations of such a hybrid model by comparing our results with a wide compilation of experimental data. It turns out that the hybrid model reproduces appropriate well not only the general experimental trends (mass and charge distributions of the yields and kinetic energies of nuclides), but also the characteristics of individual nuclides produced in such reactions. Thus it is straightforward to extend this model to heavy ion collisions at high relativistic energies. The fragment formation in the more complex situation of a nucleus-nucleus collision including the production of hypernuclei has been also studied and the results will be presented in a separated contribution.
Work supported by BMBF.