DIKUL - logo
E-resources
Full text
Open access
  • Aprile, E; Dahl, C. E; DeViveiros, L; Gaitskell, R; Giboni, K. L; Kwong, J; Majewski, P; Ni, K; Shutt, T; Yamashita, M

    01/2006
    Journal Article

    Phys.Rev.Lett. 97 (2006) 081302 We report the first measurements of the absolute ionization yield of nuclear recoils in liquid xenon, as a function of energy and electric-field. Independent experiments were carried out with two dual-phase time projection chamber prototypes, developed for the XENON Dark Matter project. We find that the charge yield increases with decreasing recoil energy, and exhibits only a weak field dependence. These results are a first demonstration of the capability of dual phase xenon detectors to discriminate between electron and nuclear recoils, a key requirement for a sensitive dark matter search at recoil energies down to 20 keV.