Abstract
Search for neutrino-less double beta decay of 100Mo is proposed using active method with Ca 100MoO4 scintillation crystals which show the brightest scintillation light among variety of inorganic scintillation materials containing Mo. Study of X-ray luminescence and scintillation properties such as energy response, number of photoelectrons/keV, absolute light yield, decay time, pulse shape discrimination and radioactive contamination of CaMoO4 crystals grown by the Czochralski method with different conditions are presented. Further R&D of resolution optimization, crystal quality improvement and background reduction are underway. Significant improvement of sensitivity to neutrino-less double beta decay can be achieved by using 100Mo enriched Ca 100MoO4 crystals with good energy resolution and low background. Further reduction of background induced by 48Ca two neutrino double beta decay can be achieved by using 48Ca depletion. We are planning to install several kilograms of Ca100MoO4 crystals depleted in 48Ca at underground laboratory for the neutrino-less double beta decay experiment in the near future.
Original language | English |
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Article number | 5485163 |
Pages (from-to) | 1475-1480 |
Number of pages | 6 |
Journal | IEEE Transactions on Nuclear Science |
Volume | 57 |
Issue number | 3 PART 2 |
DOIs | |
State | Published - Jun 2010 |
Keywords
- CaMoO
- Double beta decay
- Energy resolution
- Internal background
- Isotopic enrichment