Searching for neutrinoless double beta decay with the AMoRE experiments

Abstract

Searches for the neutrinoless double beta decay (0νDBD) have been pursued for decades by many researchers since it is a viable channel to probe the lepton number violating process and unveil some unknown properties of neutrino. The AMoRE experiments have been searching for 0νDBD of 100Mo isotope using molybdate crystal scintillators. The experiments used the molybdate crystals as the absorber for the cryogenic calorimeter, which measures the energetic phonons and scintillation lights from the particle interaction in the crystal absorber. The experiments have been scheduled as several phases of AMoRE-pilot, AMoRE-I and AMoRE-II with the significant increase in the absorber mass and reduction of the background level for each upgrade. Currently, we are running AMoRE-I experiment, which uses 6.2 kg of molybdate crystal absorbers, and preparing for AMoRE-II experiment, which will exploit 100 kg of 100Mo isotopes, ultimately. The overall status of the AMoRE experiments is presented in the paper. © 2023 Societa Italiana di Fisica. All rights reserved.