SMuK 2021 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 25: Astroparticle Physics
HK 25.6: Talk
Thursday, September 2, 2021, 18:15–18:30, H4
Monte Carlo simulation of background components in low level Germanium spectrometry — •Nicola Ackermann1, Hannes Bonet1, Christian Buck1, Janina Hakenmüller1, Gerd Heusser1, Matthias Laubenstein2, Manfred Lindner1, Werner Maneschg1, Jochen Schreiner1, and Herbert Strecker1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany — 2Laboratori Nazionali del Gran Sasso, Via G. Acitelli 22, 67100 Assergi L'Aquila, Italy
This talk presents Monte Carlo simulations of the background spectra of the four gamma-ray Ge-spectrometers GeMPI 1 - 4 at the Gran Sasso Underground Laboratory (LNGS) using the Geant4 based framework MaGe. These detectors are very low background Ge-spectrometers located at a depth of 3800 m w.e. and they currently achieve one of the best sensitivities worldwide for primordial U and Th concentrations in materials at a level of μBq/kg. With these detectors material samples are tested to confirm that they meet the stringent requirements of rare event experiments.
The three main background components that are taken into consideration in the simulations are muons, neutrons and intrinsic contaminations in the detector and shielding materials. A detailed understanding of the composition of the background spectra allows for improvements in the sensitivity of next generation screening detectors.