First results of the experiment to search for 2β decay of 106Cd with 106CdWO4 crystal scintillator in coincidence with four crystals HPGe detector
1 Institute for Nuclear Research, MSP 03680 Kyiv, Ukraine
2 Dipartimento di Fisica, Università di Roma “Tor Vergata”, I-00133 Rome, Italy
3 INFN sezione Roma “Tor Vergata” I-00133 Rome, Italy
4 Joint Institute for Nuclear Research, 141980 Dubna, Russia
5 Dipartimento di Fisica, Università di Roma “La Sapienza”, I-00185 Rome, Italy
6 INFN, sezione di Roma, I-00185 Rome, Italy
7 INFN, Laboratori Nazionali del Gran Sasso, I-67100 Assergi (AQ), Italy
8 Institute of Scintillation Materials, 61001 Kharkiv, Ukraine
a e-mail: email@example.com
Published online: 10 January 2014
An experiment to search for double beta processes in 106Cd by using cadmium tungstate crystal scintillator enriched in 106Cd (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 γ 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 106Cd are obtained, in particular T1/22νεβ+ ≥ 8.4 × 1020 yr at 90% C.L.
© Owned by the authors, published by EDP Sciences, 2014
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