August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【342】The upgraded low-background germanium counting facility Gator for high-sensitivity $\gamma$-ray spectrometry

Sep 1, 2021, 3:45 PM
Room D

Room D

Talk Nuclear, Particle- and Astrophysics (FAKT - TASK) Nuclear, Particle- & Astrophysics


Mr Alexander Bismark (University of Zurich)


The Astroparticle Physics Group at the University of Zurich operates a high-purity germanium (HPGe) spectrometer (Gator) in a low-background environment underground at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy. The 2.2 kg $\gamma$-ray spectrometer is one of the world’s most sensitive HPGe detectors with an integrated count rate of (86.2 $\pm$ 0.7) events/(day kg) in the energy region 100-2700 keV. It is used to screen and select materials for rare-event search experiments such as XENON, DARWIN, GERDA and LEGEND. We describe the general facility, the recent upgrades and their impact on the background level. We also demonstrate its sensitivity by presenting the results for several material samples.

Primary author

Mr Alexander Bismark (University of Zurich)


Ms Gabriela Rodrigues Araujo (University of Zurich) Ms Yanina Biondi (University of Zurich) Dr Michelle Galloway (University of Zurich) Prof. Laura Baudis (University of Zurich)

Presentation materials