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Darmstadt 2008 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 17: Kern- und Teilchen-Astrophysik

HK 17.3: Vortrag

Dienstag, 11. März 2008, 09:00–09:15, 2B

Neutron Interactions as Seen by A Segmented Germanium DetectorIris Abt, Allen Caldwell, Kevin Kröninger, •Jing Liu, Xiang Liu, and Bela Majorovits for the GERDA collaboration — Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München

The GERmanium Detector Array, GERDA, is designed for the search for “neutrinoless double beta decay” (0ν2β) with germanium detectors enriched in 76Ge. An 18-fold segmented prototype detector for GERDA Phase II was exposed to an AmBe neutron source. Neutron interactions with the germanium isotopes themselves and in the surrounding materials were studied. Segment information is used to identify neutron induced peaks in the recorded energy spectra.

The Geant4 based simulation package MaGe was used to simulate the experiment. Though many photon peaks from germanium isotopes excited by neutrons are correctly described by Geant4, some physics processes were identified as being incorrectly treated or even missing.

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