Physics
Scientific paper
Apr 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aph....25..179b&link_type=abstract
Astroparticle Physics, Volume 25, Issue 3, p. 179-182.
Physics
41
Scientific paper
Discrimination between electron and nuclear recoil events in a liquid argon scintillation detector has been demonstrated with simulations by using the differences in the scintillation photon time distribution between these classes of events. A discrimination power greater than 108 is predicted for a liquid argon experiment with a 10 keV threshold, which would mitigate electron and γ-ray backgrounds, including β decays of 39Ar and 42Ar in atmospheric argon. A dark matter search using a ˜2 kg argon target viewed by immersed photomultiplier tubes would allow a sensitivity to a spin-independent WIMP-nucleon cross-section of ˜10-43 cm2 for a 100 GeV WIMP, assuming a one-year exposure. This technique could be used to scale the target mass to the tonne scale, allowing a sensitivity of ˜10-46 cm2.
Boulay M. G.
Hime Andrew
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