Journal
ADVANCES IN HIGH ENERGY PHYSICS
Volume 2015, Issue -, Pages -Publisher
HINDAWI LTD
DOI: 10.1155/2015/817530
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Funding
- National Research Foundation of Korea - Korean Government [NRF-2011-220-C00006, NRF-2013K2A5A3000039]
- National Academy of Sciences of Ukraine
- [IBS-R016-G1]
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We report the development of a CaMoO4 crystal low temperature detector for the AMoRE neutrinoless double beta decay (0 nu beta beta) search experiment. The prototype detector cell was composed of a 216 g CaMoO4 crystal and a metallic magnetic calorimeter. An overground measurement demonstrated FWHM resolution of 6-11 keV for full absorption gamma peaks. Pulse shape discrimination was clearly demonstrated in the phonon signals, and 7.6 sigma of discrimination power was found for the alpha and beta/gamma separation. The phonon signals showed rise-times of about 1 ms. It is expected that the relatively fast rise-time will increase the rejection efficiency of two-neutrino double beta decay pile-up events which can be one of the major background sources in 0 nu beta beta searches.
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