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Angloher, G.; Bucci, C.; Christ, P.; Cozzini, C.; von Feilitzsch, F.; Hauff, D.; Henry, S.; Jagemann, Th; Jochum, J.; Kraus, H.; Majorovits, B.; Ninkovic, J.; Petricca, F.; Potzel, W.; Pröbst, F.; Ramachers, Y.; Razeti, M.; Rau, W.; Seidel, W.; Stark, M.; Stodolsky, L.; Tolhurst, A.J.B.; Westphal, W.; Wulandari, H.
Astroparticle physics, April 2005, 2005-04-00, 20050401, Letnik: 23, Številka: 3Journal Article
We present first significant limits on WIMP dark matter by the phonon-light technique, where combined phonon and light signals from a scintillating cryogenic detector are used. Data from early 2004 with two 300g CRESST-II prototype detector modules are presented, with a net exposure of 20.5kg days. The modules consist of a CaWO4 scintillating “target” crystal and a smaller cryogenic light detector. The combination of phonon and light signals leads to a strong suppression of non-nuclear recoil backgrounds. Using this information to define an acceptance region for nuclear recoils we have 16 events from the two modules, corresponding to a rate for nuclear recoils between 12 and 40keV of (0.87±0.22) events/(kgday). This is compatible with the rate expected from neutron background, and most of these events lie in the region of the phonon-light plane anticipated for neutron-induced recoils. A particularly strong limit for WIMPs with coherent scattering results from selecting a region of the phonon-light plane corresponding to tungsten recoils, where the best module shows zero events.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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