The role of ionization electrons in direct dark matter detection
  In this paper we estimate the event rates of neutralino-nucleus scattering leading to electron emission by the atomic ionization.   We find that the branching ratio for detecting electrons vis a vis the traditional neutralino nucleus elastic scattering sensitively depends on the threshold energy. In the case of a light target and a neutralino mass of 100 GeV we estimate it to be around 10 percent assuming a reasonable threshold energy of 250 eV. 
J.D. Vergados (University of Cyprus, Nicosia, Cyprus) and H.Ejiri   (Emeritus, RCNP, Osaka, Japan)