Cryogenic germanium or silicon detectors combining phonon and ionization signals. Relative charge yield discriminates electron and nuclear recoils, while phonon timing helps identify surface backgrounds. Lower thresholds extend light-WIMP sensitivity but require renewed efficiency, energy-scale and leakage studies.[ref]
Results from a Low-Energy Analysis of the CDMS II Germanium Data by CDMS Collaboration. detector discussion and lowered-threshold selection
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