First results from the AMoRE-Pilot neutrinoless double beta decay experiment

Alenkov, V. et al. (2019) First results from the AMoRE-Pilot neutrinoless double beta decay experiment. The European Physical Journal C, 79 (9). p. 791. ISSN ISSN: 1434-6044; E-ISSN: 1434-6052

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Official URL: https://link.springer.com/article/10.1140/epjc/s10...

Abstract

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.

Item Type: Article
Subjects: Q Science > QC Physics
Divisions: Fakultas Matematika dan ilmu Pengetahuan Alam
Depositing User: Dr. Rahadi Wirawan
Date Deposited: 13 Sep 2022 02:41
Last Modified: 13 Sep 2022 02:41
URI: http://eprints.unram.ac.id/id/eprint/31698

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