Heidelberg 2015 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 48: Poster

HK 48.53: Poster

Mittwoch, 25. März 2015, 17:00–19:00, C/Foyer

Simulation studies of the hypernuclear experiment at PANDA to optimize the production and detection rates of ΛΛ hypernuclei — Sebastian Bleser¹, Jürgen Gerl², Felice Iazzi³, Jasmina Kojouharova², Ivan Kojouharov², Marta Martinez Rojo¹, Josef Pochodzalla^1,4, Torben Rathmann⁴, Alicia Sanchez Lorente¹, and •Marcell Steinen¹ for the PANDA collaboration — ¹Helmholtz-Inst. Mainz — ²GSI, Darmstadt — ³Politec. and INFN, Torino — ⁴Inst. für Kernphysik, JGU Mainz

A key aspect of the PANDA experiment at the future FAIR facility is the production and spectroscopy of ΛΛ hypernuclei. The double hypernuclei are produced in a two-stage target system consisting of a primary in-beam filament to produce Ξ⁻ hyperons which are stopped and converted into two lambda hyperons in a secondary external target. This device is composed of a sandwich structure of layers of absorber material and silicon strip detectors for the formation of ΛΛ hypernuclei and the detection of their charged decay pions. In particular the detection of these pions give a signature of a ΛΛ hypernuclei and tag the event. The high resolution γ spectroscopy of the excited hypernuclei is performed by an array of germanium detectors.
This poster shows the simulation studies to optimize the setup concerning the production of the hypernuclei and the tracking of their decay pions. In addition the absorption of γ in the target material is taken into account. Furthermore the influence of background is studied since it might damage the germanium detectors and on the other hand is crucial to provide a good signal-to-noise ratio.