First results of the experiment to search for 2β decay of 106Cd with 106CdWO4 crystal scintillator in coincidence with four crystals HPGe detector.

Authors :: Tretyak, V. I.
Belli, P.
Bernabei, R.
Brudanin, V. B.
Cappella, F.
Caracciolo, V.
Cerulli, R.
Chernyak, D. M.
Danevich, F. A.
D'Angelo, S.
Incicchitti, A.
Laubenstein, M.
Mokina, V. M.
Poda, D. V.
Polischuk, O. G.
Podviyanuk, R. B.
Tupitsyna, I. A.
Source :: EPJ Web of Conferences; 2013, Issue 65, p1-4, 4p
Publication Year :: 2014
Abstract: An experiment to search for double beta processes in <superscript>106</superscript>Cd by using cadmium tungstate crystal scintillator enriched in <superscript>106</superscript>Cd (<superscript>106</superscript>CdWO<subscript>4</subscript>) 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 <superscript>106</superscript>CdWO<subscript>4</subscript> 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 <superscript>106</superscript>Cd are obtained, in particular T<subscript>1/2</subscript><superscript>2νεβ+ 20</superscript> ≥ 8.4 x 10 yr at 90% C.L. [ABSTRACT FROM AUTHOR]

Subjects :: BETA decay
CADMIUM
CADMIUM tungstate crystals
SCINTILLATORS
RADIOACTIVE decay

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