  We report the first detection of coherent elastic neutrino-nucleus scattering
(CEvNS) on germanium, measured at the Spallation Neutron Source at Oak Ridge
National Laboratory. The Ge-Mini detector of the COHERENT collaboration employs
large-mass, low-noise, high-purity germanium spectrometers, enabling excellent
energy resolution, and an analysis threshold of 1.5 keV electron-equivalent
ionization energy. We observe a on-beam excess of 20.6$_{+7.1}^{-6.3}$ counts
with a total exposure of 10.22 GWhkg and we reject the no-CEvNS hypothesis with
3.9 sigma significance. The result agrees with the predicted standard model of
particle physics signal rate within 2 sigma.
