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Precise measurement of the thermal quenching factor of alpha particles in Li2MoO4 cryogenic calorimeters

M. Girola, R. Serino, M. Biassoni, C. Brofferio, M. Faverzani, E. Ferri, A. Gianvecchio, L. Gironi, I. Nutini, S. Pozzi

physics.ins-detarXiv:2609.23160

Abstract

We present direct measurements of the thermal quenching factor (QF)for alpha-particles in Li2MoO4 scintillating crystals, conducted at base temperatures of 13 mK and 19 mK. Using gamma-calibration peaks from a 232Th source and alpha-lines from a surface 224Ra source, the QFalpha was determined to range from 1.07 to 1.09 which is consistent with previous studies. A slight energy-dependent trend in QFalpha was observed.

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