Heidelberg 2015 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 16: Structure and Dynamics of Nuclei 3

HK 16.3: Talk

Monday, March 23, 2015, 17:30–17:45, T/HS2

Yields of hypernuclear fragments in experiments at MAMI — •Florian Schulz, Patrick Achenbach, Konstantin Bob, Anselm Esser, and Josef Pochodzalla — Institut für Kernphysik, Johannes Gutenberg-Universität, Mainz

Hypernuclear decay-pion experiments have been performed at the Mainz Microtron MAMI, aimed at the precise measurement of the ground state binding energy of Λ-hypernuclei produced in fragmentation reactions.

Predictions of the yields of hypernuclear isotopes in this experiments are based on model calculations. Starting with a highly excited state of a Λ-hypernucleus, formed in the electro-production process, the fragmentation is evaluated within a statistical decay model. The excitation energies contributing to the formation of hyperfragments are in the range of 10-50 MeV. The different fragmentation yields and ratios were determined for light target nuclei up to carbon.

By comparing this predictions with the experimentally observed yield ratios, it will be possible to extract information on the initial nucleus and its excitation energy. This can grant a deeper understanding of the whole production process within the model framework.