Measurements of the Internal Background of CSI(Tℓ) Crystal Detectors for Dark Matter Search

Details Measurements of the Internal Background of CSI(Tℓ) Crystal Detectors for Dark Matter Search Measurements of the Internal Background of CSI(Tℓ) Crystal Detectors for Dark Matter Search

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003idm..conf..351k&link_type=abstract

THE IDENTIFICATION OF DARK MATTER. Proceedings of the Fourth International Workshop. Held 2 - 6 September 2002 in York, UK. Edit

Physics

Dark Matter, Experiments, Detectors

Scientific paper

The background spectra of CsI(Tℓ) crystal detectors in a prototype shield were obtained. The lowest background count rate of the test sample of crystals is measured to be 64.7 ± 5.1 counts/keV/kg/day in the energy range of 5-20 keV. Quantitative estimation of residual radioactive isotope in CsI(Tℓ) was made using the GEANT4 Monte Carlo simulation. Analysis results show that CsI(Tℓ) crystal could be a good candidate for direct detection of WIMPs when the contamination level of cesium radioisotopes is reduced to under a few mBq/kg.

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