During a Double Beta Decay experiment performed at Laboratori Nazionali del Gran Sasso, a 274 hours low-threshold background spectra was collected with a 340 g TeO2 detector. The MIBETA experiment consists of 20 Tellurium oxide crystals working as bolometers at T = 10 mK in a dilution refrigerator. We present here the analysis carried out on a single detector to search for possible WIMP signal. The values of parameters which are essential in the search for WIMP's, like energy resolution (similar to 2 keV), energy threshold (10 keV) and nuclear quenching factor (similar or equal to 1) have been experimentally determined and are discussed in detail. The exclusion plot of the spin-independent cross section of WIMP's on the nuclei is reported.
Pirro, S., Alessandrello, A., Brofferio, C., Bucci, C., Cremonesi, O., Fiorini, E., et al. (2001). Dark matter results in the MIBETA experiment. In SOURCES AND DETECTION OF DARK MATTER AND DARK ENERGY IN THE UNIVERSE (pp.420-427). BERLIN : SPRINGER-VERLAG BERLIN.
Dark matter results in the MIBETA experiment
BROFFERIO, CHIARA;CREMONESI, OLIVIERO;FIORINI, ETTORE;NUCCIOTTI, ANGELO ENRICO LODOVICO;PAVAN, MAURA;PESSINA, GIANLUIGI EZIO;PREVITALI, EZIO;ZANOTTI, LUIGI ERNESTOUltimo
2001
Abstract
During a Double Beta Decay experiment performed at Laboratori Nazionali del Gran Sasso, a 274 hours low-threshold background spectra was collected with a 340 g TeO2 detector. The MIBETA experiment consists of 20 Tellurium oxide crystals working as bolometers at T = 10 mK in a dilution refrigerator. We present here the analysis carried out on a single detector to search for possible WIMP signal. The values of parameters which are essential in the search for WIMP's, like energy resolution (similar to 2 keV), energy threshold (10 keV) and nuclear quenching factor (similar or equal to 1) have been experimentally determined and are discussed in detail. The exclusion plot of the spin-independent cross section of WIMP's on the nuclei is reported.
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