Development of CaMoO4 crystal scintillators for a double beta decay experiment with

Scintillation Properties and Internal Background Study of $^{40}$Ca$^{100}$MoO$_{4}$ Crystal Scintillators for Neutrino-Less Double Beta Decay Search

“…The light output of the S35 sample was slightly lower than that of natural CaMoO crystal, and this is consistent with our previous result [11]. The averaged decay times [9] of Ca MoO crystal samples were measured to be about 17 s, and these values were also consistent with our previous study of natural scintillators [9].…”

“…The measured electron-equivalent energy of Am particle (5.64 MeV) was 1.12 MeV. The ratio was calculated to be and this value was consistent with our previous study [9]. However, the energy of external particles could be reduced by small air gap between the crystal and the source, and also by surface condition of the Am source and the scintillator.…”

“…However, presence of DBD process in Ca (abundance in natural Ca is 0.187%) will cause unavoidable background for DBD of Mo [9]. For these reasons, calcium molybdate crystals depleted in Ca and enriched in Mo ( Ca MoO ) have been produced for the first time by JSC FOMOS-Materials in Russia using Czochralski method [11].…”

Optical, luminescence and thermal properties of radiopure ZnMoO4 crystals used in scintillating bolometers for double beta decay search

“…There are several possibilities for low temperature crystal scintillators containing molybdenum: Li 2 MoO 4 [27,28], Li 2 Zn 2 (-MoO 3 ) 4 [29], CaMoO 4 [8,[30][31][32][33], SrMoO 4 [8], CdMoO 4 [8,34], PbMoO 4 [8,[35][36][37]. Zinc molybdate (ZnMoO 4 ) is one of the most promising materials for the search for 0ν2β decay of 100 Mo thanks to the absence of long-lived radioactive isotopes of constituting elements and comparatively high percentage of molybdenum (43% in weight).…”

Growing Large Size Complex Oxide Single Crystals by Czochralski Technique for Electronic Devices

“…The arguments to develop CaMoO 4 are as follows: 100 Mo is one of the most promising candidate to search for neutrinoless double beta decay (a key process in the modern physics) [34]; CaMoO 4 contains valuable part of Mo (48%); CaMoO 4 does not contain radioactive elements; CaMoO 4 is a reasonably ecient scintillator even at room temperature [35]; CaMoO 4 is a promising material for low temperature scintillating bolometers (with high energy resolution and particle discrimination ability) [36,37].…”