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Darmstadt 2008 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 34: Postersitzung

HK 34.97: Poster

Thursday, March 13, 2008, 14:00–16:00, Poster C3

Simulation of compound nucleus reactions with microwave billiards in the region of overlapping levelsBarbara Dietz1, •Thomas Friedrich1, Hanns Ludwig Harney2, Maksim Miski-Oglu1, Achim Richter1, Florian Schäfer1, and Hans Weidenmüller21Institut für Kernphysik, TU Darmstadt — 2Max Planck Institut für Kernphysik, Heidelberg

The excitation cross section of compound nucleus reactions exhibits either isolated resonances, or fluctuates when resonances overlap strongly in the Ericson regime due to high level density. This scenario can be simulated using flat microwave cavities. We measured the complex scattering matrix of a microwave cavity in an intermediate regime where the system decays non-exponentially. In the framework of random matrix theory the fluctuations are modelled by an expression of Verbaarschot, Weidenmüller, and Zirnbauer for the scattering via quantum chaotic systems. We developed a statistical test for this model and find that it describes the measured data as long as the dynamics of the system is purely chaotic. This in turn provides a tool to explore the dynamics of a resonating system.

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