Author/Authors :
Danevich، نويسنده , , F.A. and Georgadze، نويسنده , , A.Sh. and Kobychev، نويسنده , , V.V. and Kropivyansky، نويسنده , , B.N. and Nagorny، نويسنده , , S.S. and Nikolaiko، نويسنده , , A.S. and Poda، نويسنده , , D.V. and Tretyak، نويسنده , , V.I. and Vyshnevskyi، نويسنده , , I.M. and Yurchenko، نويسنده , , S.S. and Grinyov، نويسنده , , B.V. and Nagornaya، نويسنده , , L.L. and Pirogov، نويسنده , , E.N. and Ryzhikov، نويسنده , , V.D. and Brudanin، نويسنده , , V.B. and Vylov، نويسنده , , Ts. and Fedorov، نويسنده , , A. and Korzhik، نويسنده , , M. and Lobko، نويسنده , , A. and Missevitch، نويسنده , , O.، نويسنده ,
Abstract :
Lead tungstate (PbWO4) crystal scintillators are discussed as an active shield and light guides in 116Cd double-beta decay experiment with Cadmium tungstate (CdWO4) scintillators. Scintillation properties and radioactive contamination of PbWO4 scintillators were investigated. Energy resolution of CdWO4 detector, coupled to PbWO4 light guide, was tested. Efficiency of PbWO4-based active shield to suppress background from the internal contamination of PbWO4 crystals, as well as possible contribution from radioactivity of copper shield and phototubes were calculated. Using of lead tungstate crystal scintillators as high-efficiency 4 π active shield could allow to build sensitive 2 β experiment ( T 1 / 2 0 ν 2 β ∼ 10 26 yr ) to search for 0 ν 2 β decay of 116Cd with 116CdWO4 crystal scintillators.
Keywords :
scintillation detector , Double-beta decay , Low counting experiments , PbWO4 and CdWO4 crystals
