CaMoO/sub 4/ scintillation crystal for the search of /sup 100/Mo double beta decay

Scintillation properties of calcium molybdate are investigated. Emission spectrum is broad with a maximum at 520 nm, at room temperature light yield is 400 photoelectrons/MeV, decay time is 17 /spl mu/s, at cooling light yield and decay time increase. Prospects of optimization of this scintillator a...

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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: Conference Proceeding
Language:English
Subjects:
Calcium
Cooling
Electron emission
Elementary particles
Energy resolution
Neutrino sources
Physics
Radioactive decay
Scintillation counters
Temperature
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Summary:Scintillation properties of calcium molybdate are investigated. Emission spectrum is broad with a maximum at 520 nm, at room temperature light yield is 400 photoelectrons/MeV, decay time is 17 /spl mu/s, at cooling light yield and decay time increase. Prospects of optimization of this scintillator are discussed. Feasibility of the material for the search of neutrinoless double beta decay of /sup 100/Mo is analyzed. Half life limit of T/sub 1/2/ = 1 /spl middot/ 10/sup 25/ years (68% CL) seems feasible with CaMoO/sub 4/ scintillator, containing 10 kg of /sup 100/Mo after 5 year of measurements. The problem of background due to two neutrino double beta decay of /sup 48/Ca is considered. Request for new scintillators for double beta decay search is formulated.
ISSN:1082-3654
2577-0829
DOI:10.1109/NSSMIC.2004.1462083