Heidelberg 2015 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 48: Poster
HK 48.53: Poster
Wednesday, March 25, 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 Pochodzalla1,4, 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.