Development of MMC-based lithium molybdate cryogenic calorimeters for AMoRE-II - INSPIRE

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Development of MMC-based lithium molybdate cryogenic calorimeters for AMoRE-II

AMoRE

Collaboration

Jul 16, 2024

13 pages

Published in:

Eur.Phys.J.C 85 (2025) 2, 172,
Eur.Phys.J.C 85 (2025) 3, 256 (erratum)

Published: Feb 11, 2025
and
Published: Mar 10, 2025

e-Print:

2407.12227 [physics.ins-det]

DOI:

10.1140/epjc/s10052-024-13498-8,
10.1140/epjc/s10052-025-13991-8 (erratum)

Experiments:

AMORE

View in:

ADS Abstract Service

reference search1 citation

Citations per year

Abstract: (Springer)

The AMoRE collaboration searches for neutrinoless double beta decay of

^{100}

Mo using molybdate scintillating crystals via low temperature thermal calorimetric detection. The early phases of the experiment, AMoRE-pilot and AMoRE-I, have demonstrated competitive discovery potential. Presently, the AMoRE-II experiment, featuring a large detector array with about 90 kg of

^{100}

Mo isotope, is under construction. This paper discusses the baseline design and characterization of the lithium molybdate cryogenic calorimeters to be used in the AMoRE-II detector modules. The results from prototype setups that incorporate new housing structures and two different crystal masses (316 g and 517–521 g), operated at 10 mK temperature, show energy resolutions (FWHM) of 7.55–8.82 keV at the 2.615 MeV

^{208}

Tl

\gamma

line and effective light detection of 0.79–0.96 keV/MeV. The simultaneous heat and light detection enables clear separation of alpha particles with a discrimination power of 12.37–19.50 at the energy region around

^{6}

Li

(n,\alpha )^3

H with Q-value = 4.785 MeV. Promising detector performances were demonstrated at temperatures as high as 30 mK, which relaxes the temperature constraints for operating the large AMoRE-II array.

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