Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 855, Issue -, Pages 140-147Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2017.01.070
Keywords
Background simulation; Detectors; Neutrinoless double beta decay; Underground experiment
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Funding
- Institute for Basic Science (Korea) [IBS-R016-D1]
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The first phase of the Advanced Mo-based Rare process Experiment (AMoRE-I), an experimental search for neutrinoless double beta decay (0V beta beta) of Mo-100 in calcium molybdate (Ca-40(100) MoO4) crystal using cryogenic detection techniques, is in preparation at the YangYang underground laboratory (Y2L) in Korea. A GEANT4 based Monte Carlo simulation was performed for the first-phase AMoRE detector and shield configuration. Background sources such as U-238, Th-232 U-235, and Pb-210 from inside the crystals, surrounding materials, outer shielding walls of the Y2L cavity were simulated. The estimated background rate in the region of interest was estimated to be < 1.5 x 10(-3) counts/keV/kg/yr (ckky). The effects of random coincidences between backgrounds and two-neutrino double beta decays of Mo-100 as a potential background source were estimated to be < 2.3 x 10(-4) ckky.
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