KIP publications

year 2019
author(s) V. Alenkov, H. W. Bae, J. Beyer, R. S. Boiko, K. Boonin, O. Buzanov, N. Chanthima, M. K. Cheoun, D. M. Chernyak, J. S. Choe, S. Choi, F. A. Danevich, M. Djamal, D. Drung, C. Enss, A. Fleischmann, A. M. Gangapshev, L. Gastaldo, et al.
title First results from the AMoRE-Pilot neutrinoless double beta decay experiment
KIP-Nummer HD-KIP 20-31
KIP-Gruppe(n) F3,F4,F5
document type Paper
source Eur. Phys. J. C 79, 791 (2019)
doi 10.1140/epjc/s10052-019-7279-1
Abstract (en)

The advanced molybdenum-based rare process experiment (AMoRE) aims to search for neutrinoless double beta decay (0𝜈𝛽𝛽) of 100Mo with ∼100kg of 100Mo-enriched molybdenum embedded in cryogenic detectors with a dual heat and light readout. At the current, pilot stage of the AMoRE project we employ six calcium molybdate crystals with a total mass of 1.9 kg, produced from 48Ca-depleted calcium and 100Mo-enriched molybdenum (48deplCa100MoO4). The simultaneous detection of heat (phonon) and scintillation (photon) signals is realized with high resolution metallic magnetic calorimeter sensors that operate at milli-Kelvin temperatures. This stage of the project is carried out in the Yangyang underground laboratory at a depth of 700 m. We report first results from the AMoRE-Pilot 0𝜈𝛽𝛽 search with a 111 kg day live exposure of 48deplCa100MoO4 crystals. No evidence for 0𝜈𝛽𝛽 decay of 100Mo is found, and a upper limit is set for the half-life of 0𝜈𝛽𝛽 of 100Mo of 𝑇0𝜈1/2>9.5×1022 years at 90% C.L. This limit corresponds to an effective Majorana neutrino mass limit in the range ⟨𝑚𝛽𝛽⟩≤(1.2−2.1)eV.

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