Measurement of the ionization produced by sub-keV silicon nuclear recoils in a CCD dark matter detector

We report a measurement of the ionization efficiency of silicon nuclei recoiling with sub-keV kinetic energy in the bulk silicon of a charge-coupled device (CCD). Nuclear recoils are produced by low-energy neutrons (<24 keV) from a ^{124}Sb-^{9}Be photoneutron source, and their ionization signal is measured down to 60 eV electron... Show more