First results of the nuGeN experiment on coherent elastic neutrino-nucleus scattering

Abstract

The nuGeN experiment is aimed to investigate neutrino properties using antineutrinos from the reactor of the Kalinin Nuclear Power Plant. The experimental setup is located at about 11 meters from the center of the 3.1 GWth reactor core. Scattering of the antineutrinos from the reactor is detected with low energy threshold high purity germanium detector. Passive and active shieldings are used to suppress all kinds of backgrounds coming from surrounding materials and cosmic radiation. The description of the experimental setup together with the first results is presented. The data taken in regimes with reactor ON (94.50 days) and reactor OFF (47.09 days) have been compared. No significant difference between spectra of two data sets is observed, i.e. no positive signals for coherent elastic neutrino-nucleus scattering are detected. Under Standard Model assumptions about coherent neutrino scattering an upper limit on a quenching parameter k < 0.26 (90 \% C.L.) in germanium has been set.

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• Implications of the first CONUS+ measurement of coherent elastic neutrino-nucleus scattering
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• Reactor neutrino liquid xenon coherent elastic scattering experiment
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• Incoherent solar-neutrino scattering off the stable Tl-isotopes
• Searches for CEνNS and Physics beyond the Standard Model using Skipper-CCDs at CONNIE
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