Title :
CaMoO4 scintillation crystal for the search of 100Mo double beta decay
Author :
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. ;
Author_Institution :
Inst. for Theor. & Exp. Phys., Moscow, Russia
Abstract :
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 μs, 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 100Mo is analyzed. Half life limit of T12/ = 1 · 1025 years (68% CL) seems feasible with CaMoO4 scintillator, containing 10 kg of 100Mo after 5 year of measurements. The problem of background due to two neutrino double beta decay of 48Ca is considered. Request for new scintillators for double beta decay search is formulated.
Keywords :
calcium compounds; photoluminescence; scintillation; solid scintillation detectors; 10 kg; 17 mus; 520 nm; 100Mo neutrinoless double beta decay; 48Ca neutrino double beta decay; CaMoO4; CaMoO4 scintillation crystal; CaMoO4 scintillator; calcium molybdate scintillation properties; decay time; emission spectrum; half life limit; light yield; Calcium; Cooling; Electron emission; Elementary particles; Energy resolution; Neutrino sources; Physics; Radioactive decay; Scintillation counters; Temperature;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2004 IEEE
Print_ISBN :
0-7803-8700-7
Electronic_ISBN :
1082-3654
DOI :
10.1109/NSSMIC.2004.1462083
