Limits on spin-independent couplings of WIMP dark matter with a p-type
  point-contact germanium detector
  We report new limits on spin-independent WIMP-nucleon interaction
cross-section using 39.5 kg-days of data taken with a p-type point-contact
germanium detector of 840 g fiducial mass at the Kuo-Sheng Reactor Neutrino
Laboratory. Crucial to this study is the understanding of the selection
procedures and, in particular, the bulk-surface events differentiation at the
sub-keV range. The signal-retaining and background-rejecting efficiencies were
measured with calibration gamma sources and a novel n-type point-contact
germanium detector. Part of the parameter space in cross-section versus
WIMP-mass implied by various experiments is probed and excluded.
