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

Abstract

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 equivalent. This energy range, previously unexplored, is relevant for the detection of low-mass dark matter particles. The measured efficiency is found to deviate from the extrapolation to low energies of the Lindhard model. This measurement also demonstrates the sensitivity to nuclear recoils of CCDs employed by DAMIC, a dark matter direct detection experiment located in the SNOLAB underground laboratory.

arXiv comment7 pages, 7 figures

References in corpus (6)

• Asymmetric Dark Matter: Theories, Signatures, and Constraints
• Search for low-mass WIMPs in a 0.6 kg day exposure of the DAMIC experiment at SNOLAB
• Applications of an Y-88/Be photo-neutron calibration source to Dark Matter and Neutrino Experiments
• Measurement of radioactive contamination in the high-resistivity silicon CCDs of the DAMIC experiment
• A reanalysis of radioisotope measurements of the ${}^9$Be$(\gamma ,n{)}^8$Be cross-section
• New libraries for simulating neutron scattering in dark matter detector calibrations

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