Effect of point defects on the performances of Li2MoO4 and Li2WO4 crystals as scintillating cryogenic calorimeters

Effect of point defects on the performances of Li2MoO4 and Li2WO4 crystals as scintillating cryogenic calorimeters Full article

Journal

Journal of Alloys and Compounds
ISSN: 0925-8388 , E-ISSN: 1873-4669

Output data

Year: 2025, Volume: 1022, Article number : 179848, Pages count : 10 DOI: 10.1016/j.jallcom.2025.179848

Tags

ScintillationCryogenic calorimetersThermally stimulated luminescencePoint defectsNeutrinoless Double Beta DecayScintillation sensitization

Authors

Cova Francesca ^1,2 , Girola Massimo ^2,3 , Stabile Martina ¹ , Puiu Andrei ⁴ , Nagorny Serge ^4,5 , Tomei Claudia ⁶ , Dafinei Ioan ⁶ , Grigorieva Veronika D. ⁷ , Shlegel Vladimir N. ⁷ , Fasoli Mauro ^1,2

Affiliations

1	Department of Materials Science, University of Milano – Bicocca, via Cozzi 55, Milan 20125, Italy
2	INFN – Sezione di Milano - Bicocca, Italy
3	Department of Physics, University of Milano – Bicocca, Piazza della Scienza 3, Milan 20126, Italy
4	INFN, Laboratori Nazionali del Gran Sasso, Assergi 67100, Italy
5	Gran Sasso Science Institute, L'Aquila 67100, Italy
6	INFN – Sezione di Roma, Rome 00185, Italy
7	Nikolaev Institute of Inorganic Chemistry, SB RAS, Novosibirsk 630090, Russia

The use of large scintillating crystals as cryogenic calorimeters was proven to be a promising strategy in the search for the neutrinoless Double Beta Decay (0νββ). Such a rare nuclear process would provide crucial information on the nature of the neutrino (i.e. whether it is a Majorana or a Dirac particle) and on the value of its mass. In this work, scintillating crystals of Li2MoO4, Li2MoO4:Ag, and Li2WO4 grown by the Czochralski technique were studied as they are both promising candidates for scintillating cryogenic calorimeters: the former due to 100Mo isotope suitable for 0νββ search, and the latter because of the presence of 6Li for spin dependent dark matter search. Using various spectroscopic techniques, we investigated the scintillating properties of all these crystals and the effect of point defects on their scintillation performances, evaluating the parameters of the traps involved in the scintillation mechanism and demonstrating for the first time that the temperature dependence of the bright burn phenomenon is tightly correlated with the presence of defects responsible for low temperature thermally stimulated luminescence peaks.

Cova F. , Girola M. , Stabile M. , Puiu A. , Nagorny S. , Tomei C. , Dafinei I. , Grigorieva V.D. , Shlegel V.N. , Fasoli M.
Effect of point defects on the performances of Li2MoO4 and Li2WO4 crystals as scintillating cryogenic calorimeters
Journal of Alloys and Compounds. 2025. V.1022. 179848 :1-10. DOI: 10.1016/j.jallcom.2025.179848 WOS OpenAlex

Submitted:	Oct 25, 2024
Accepted:	Mar 16, 2025
Published online:	Mar 17, 2025
Published print:	Apr 10, 2025

Web of science:	WOS:001452372000001
OpenAlex:	W4408515183

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