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T: Fachverband Teilchenphysik
T 215: Niederenergetische Neutrinos I
T 215.6: Talk
Tuesday, March 6, 2007, 18:00–18:15, INF 306 SR 14
Neutron interactions with segmented germanium detectors studies with a GERDA Phase II prototype detector — •Jing Liu, Iris Abt, Allen Caldwell, Manuela Jelen, Kevin Kröninger, Daniel Lenz, Xiang Liu, Bela Majorovits, and Jens Schubert — Max-Planck-Institut für Physik, Föhringer Ring 6,80805 München
The GERmanium Detector Array, GERDA, is designed to search for “neutrinoless double beta decay” (0ν2β) with Germanium detectors enriched in 76Ge. The estimate of neutron induced background relies purely on Geant4 simulations.
In order to study neutron interactions with the Germanium itself as well as the surrounding materials, a prototype detector for GERDA Phase II with 18 segments was exposed to an AmBe neutron source. The simulated results from the Geant4-based MaGe MC package agree in general with the measurements, thus verifying the MC used. The Geant4 package is able to simulate most de-excitation photons from the Germanium isotopes and the nuclei recoil process after interacting with neutrons. However, some physics processes are missing in the simulation.