Scintillation Crystal for the Search of Double Beta Decay

Scintillation properties of calcium molybdate are investigated. The emission spectrum is broad with a maximum at 520 nm. At room temperature the light yield is 4% of CsI(Tl) (400 photoelectrons/MeV) and the decay time is 17 muhbox s . During cooling the light yield and decay time increase. Prospects...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 2005-08, Vol.52 (4), p.1131
Main Authors: Belogurov, S, Kornoukhov, V, Annenkov, A, Borisevich, A, Fedorov, A, Korzhik, M, Ligoun, V, Missevitch, O, Kim, S.K, Kim, S.C, Kim, S.Y, Kwak, J.W, Lee, H.S, Lee, J, Myung, S.S, Lee, M.J, Kim, Y.D, Lee, J.Y, Lee, J.I, Kim, H.J, Kwon, Y.J, Hwang, M.J, Zhu, J.J
Format: Article
Language:English
Subjects:
Beta decay
Crystals
Decay
Molybdates
Optimization
Running
Scintillation
Searching
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Summary:Scintillation properties of calcium molybdate are investigated. The emission spectrum is broad with a maximum at 520 nm. At room temperature the light yield is 4% of CsI(Tl) (400 photoelectrons/MeV) and the decay time is 17 muhbox s . During cooling the light yield and decay time increase. Prospects of optimization of this scintillator are also discussed. The feasibility of the material for the search of neutrinoless double beta decay of 100 hbox Mo is analyzed. A half life limit of T 1 / 2 = 1 cdot 10 25 ~ hbox years (68% CL) seems feasible with hbox CaMoO 4 scintillator, running with 10 kg of 100 hbox Mo for 5 years. The background due to two neutrino double beta decay of 48 hbox Ca is also considered. Requirements for new scintillators for double beta decay search are formulated.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2005.852678