Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2001-09-12
Astropart.Phys.17:401-408,2002
Physics
High Energy Physics
High Energy Physics - Experiment
14 pages, 6 figures
Scientific paper
10.1016/S0927-6505(01)00167-0
The status of dark matter searches with inorganic scintillator detectors at Boulby mine is reviewed and the results of tests with a CsI(Tl) crystal are presented. The objectives of the latter experiment were to study anomalous fast events previously observed and to identify ways to remove this background. Clear indications were found that these events were due to surface contamination of crystals by alphas, probably from radon decay. A new array of unencapsulated NaI(Tl) crystals immersed either in liquid paraffin or pure nitrogen atmosphere is under construction at Boulby. Such an approach allows complete control of the surface of the crystals and the ability to remove any surface contamination. First data from the unencapsulated NaI(Tl) do not show the presence of anomalous fast events.
Ahmed B.
Alner G. J.
Barton J. C.
Bewick A.
Carson J. M.
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