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May 2 – 6, 2022
Europe/Rome timezone

Direct measurement of the ionization quenching factor of nuclear recoils in germanium in the keV energy range for the CONUS experiment

May 3, 2022, 10:20 AM
"E. Fermi" conference room (LNGS)

"E. Fermi" conference room


Via G. Acitelli, 22 67100 L'Aquila ITALY
Poster Presentation Fundamental Physics Fundamental physics


Aurélie Bonhomme (MPIK Heidelberg)


Recent development of ultra-sensitive particle detectors have opened the possibility to detect the neutrinos via coherent elastic neutrino-nucleus scattering (CE$\nu$NS). Having a larger cross-section, this process offers opportunities to further study this elusive particle in rather compact detectors and paves the way for new explorations beyond the Standard Model of particle physics.

The CONUS experiment is located at 17m from the 3.9GW$_{th}$ core of the nuclear power plant Brokdorf (Germany) and aims to detect CE$\nu$NS with four 1 kg-sized high-purity germanium detectors with a sub-keV energy threshold. A deep understanding of the detector response to nuclear recoils is needed for the interpretation of the data and motivated a dedicated measurement of the ionization quenching factor in 2020 at the PTB facility in Braunchschweig (Germany), where an HPGe target was irradiated by mono-energetic neutrons. In this talk, the results of this campaign will be presented in details and the most recent results of the CONUS experiment will be exposed, in light of this new knowledge.

Primary author

Aurélie Bonhomme (MPIK Heidelberg)

Presentation materials