A. Agrawal, V.V. Alenkov, P. Aryal, J. Beyer, B. Bhandari, R.S. Boiko, K. Boonin, O. Buzanov, C.R. Byeon, N. Chanthima, M.K. Cheoun, J.S. Choe, Seonho Choi, S. Choudhury, J.S. Chung, F.A. Danevich, M. Djamal, D. Drung, C. Enss, A. Fleischmann, Q. Yue
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引用次数: 0
Abstract
We report a study on the background of the Advanced Molybdenum-Based Rare process Experiment (AMoRE), a search for neutrinoless double beta decay () of 100Mo. The pilot stage of the experiment was conducted using 1.9 kg of CaMoO crystals at the Yangyang Underground Laboratory, South Korea, from 2015 to 2018. We compared the measured energy spectra in three experimental configurations with the results of Monte Carlo simulations and identified the background sources in each configuration. We replaced several detector components and enhanced the neutron shielding to lower the background level between configurations. A limit on the half-life of decay of 100Mo was found at years at 90% confidence level, based on the measured background and its modeling. Further reduction of the background rate in the AMoRE-I and AMoRE-II are discussed.
期刊介绍:
Astroparticle Physics publishes experimental and theoretical research papers in the interacting fields of Cosmic Ray Physics, Astronomy and Astrophysics, Cosmology and Particle Physics focusing on new developments in the following areas: High-energy cosmic-ray physics and astrophysics; Particle cosmology; Particle astrophysics; Related astrophysics: supernova, AGN, cosmic abundances, dark matter etc.; Gravitational waves; High-energy, VHE and UHE gamma-ray astronomy; High- and low-energy neutrino astronomy; Instrumentation and detector developments related to the above-mentioned fields.