First Results from the DRIFT-IIa Dark Matter Detector

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dc.creatorBurgos, S.
dc.creatorForbes, J.
dc.creatorGhag, C.
dc.creatorGold, M.
dc.creatorKudryavtsev, V. A.
dc.creatorLawson, T. B.
dc.creatorLoomba, D.
dc.creatorMajewski, P.
dc.creatorMuna, D.
dc.creatorMurphy, A. StJ.
dc.creatorNicklin, G. G.
dc.creatorPaling, S. M.
dc.creatorPetkov, A.
dc.creatorPlank, S. J. S.
dc.creatorRobinson, M.
dc.creatorSanghi, N.
dc.creatorSmith, N. J. T.
dc.creatorSnowden-Ifft, D. P.
dc.creatorSpooner, N. J. C.
dc.creatorSumner, T. J.
dc.creatorTurk, J.
dc.creatorTziaferi, E.
dc.date2007-07-10
dc.date.accessioned2026-07-07T11:17:42Z
dc.date.available2026-07-07T11:17:42Z
dc.descriptionData from the DRIFT-IIa directional dark matter experiment are presented, collected during a near continuous 6 month running period. A detailed calibration analysis comparing data from gamma-ray, x-ray and neutron sources to a GEANT4 Monte Carlo simulations reveals an efficiency for detection of neutron induced recoils of 94+/-2(stat.)+/-5(sys.)%. Software-based cuts, designed to remove non-nuclear recoil events, are shown to reject 60Co gamma-rays with a rejection factor of better than 8x10-6 for all energies above threshold. An unexpected event population has been discovered and is shown here to be due to the alpha-decay of 222Rn daughter nuclei that have attached to the central cathode. A limit on the flux of neutrons in the Boulby Underground Laboratory is derived from analysis of unshielded and shielded data.
dc.description43 pages, 14 figures, submitted to Astroparticle Physics
dc.identifierhttps://arxiv.org/abs/0707.1488
dc.identifierhttp://arxiv.org/abs/0707.1488
dc.identifierAstropart.Phys.28:409-421,2007
dc.identifierdoi:10.1016/j.astropartphys.2007.08.007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/193096
dc.subjectHigh Energy Physics - Experiment
dc.titleFirst Results from the DRIFT-IIa Dark Matter Detector
dc.typetext

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