Searches for new physics in the coherent elastic neutrino-nucleus scattering require a precise knowledge of the neutrino flux and energy spectrum. In this paper we investigate the feasibility and the performances of an experiment based on a 51Cr source, whose neutrino spectrum is known and whose activity can be heat-monitored at few permil level. With a 5 MCi source placed at ~ 25 cm from the detector, under an exposure of two 51Cr half-lives (55.4 days), we evaluate 3900 (900) counts on a 2000 cm3 target of germanium (sapphire) featuring an energy threshold of 8 (20) eV. To further increase the exposure, multiple activations of the same source could be possible.
@article{arxiv.1905.10611,
title = {Coherent elastic nuclear scattering of $^{51}$Cr neutrinos},
author = {C. Bellenghi and D. Chiesa and L. Di Noto and M. Pallavicini and E. Previtali and M. Vignati},
journal= {arXiv preprint arXiv:1905.10611},
year = {2019}
}