106CdWO4 crystal scintillator in coincidence with four crystals HPGe detector
نویسندگان
چکیده
An experiment to search for double beta processes in Cd by using cadmium tungstate crystal scintillator enriched in Cd (106CdWO4) in coincidence with the four crystals HPGe detector GeMulti is in progress at the STELLA facility of the Gran Sasso underground laboratory of INFN (Italy). The 106CdWO4 scintillator is viewed by a low-background photomultiplier tube through a lead tungstate crystal light-guide produced from deeply purified archaeological lead to suppress quanta from the photomultiplier tube. Here we report the first results of the experiment after 3233 hours of the data taking. A few new improved limits on double beta processes in Cd are obtained, in particular T1/2 2+ 8.4 × 10 yr at 90% C.L.
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