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arXiv · 1601.01249

Simulations of background sources in AMoRE-I experiment

A. Luqman·D. H. Ha·J. J. Lee·E. J. Jeon·H. S. Jo·H. J. Kim·Y. D. Kim·Y. H. Kim·V. V. Kobychev·H. S. Lee·H. K. Park·K. Siyeon·J. H. So·V. I. Tretyak·Y. S. Yoon
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Abstract

The first phase of the Advanced Mo-based Rare Process Experiment (AMoRE-I), an experimental search for neutrinoless double beta decay (0$νββ$) of $^{100}$Mo in calcium molybdate (CMO) crystal using cryogenic techniques, is in preparation at the YangYang underground laboratory (Y2L) in South Korea. A GEANT4 based Monte Carlo simulation was performed for background estimation in the first-phase the AMoRE-I detector and shield configuration. Background sources such as $^{238}$U, $^{232}$Th, $^{40}$K, $^{235}$U, and $^{210}$Pb were simulated from inside the crystals, surrounding materials, outer shielding walls of the Y2L cavity. The estimated background rate in the region of interest was found to be $< 1.5 \times 10^{-3}$ counts/keV/kg/yr (ckky). The effects of random coincidences between background and two-neutrino double beta decay of $^{100}$Mo were estimated as a potential background source and its estimated rate was $< 2.3 \times 10^{-4}$ ckky.

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A. Luqman, D. H. Ha, J. J. Lee, E. J. Jeon, H. S. Jo, H. J. Kim, Y. D. Kim, Y. H. Kim, V. V. Kobychev, H. S. Lee, H. K. Park, K. Siyeon, J. H. So, V. I. Tretyak, Y. S. Yoon. 2016-07-07. Simulations of background sources in AMoRE-I experiment. https://doi.org/10.1016/j.nima.2017.01.070

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