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Sound and Light from Fractures in Scintillators

Abstract : Prompted by intriguing events observed in certain particle-physics searches for rare events, we study light and acoustic emission simultaneously in some inorganic scintillators subject to mechanical stress. We observe mechanoluminescence in Bi4Ge3O12, CdWO4, and ZnWO4, in various mechanical configurations at room temperature and ambient pressure. We analyze the temporal and amplitude correlations between the light emission and the acoustic emission during fracture. A novel application of the precise energy calibration of Bi4Ge3O12 provided by radioactive sources allows us to deduce that the fraction of elastic energy converted to light is at least 3×10−5.
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Submitted on : Friday, March 9, 2018 - 10:23:56 AM
Last modification on : Saturday, January 16, 2021 - 3:29:15 AM

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A. Tantot, S. Santucci, O. Ramos, Stéphanie Deschanel, M.-A. Verdier, et al.. Sound and Light from Fractures in Scintillators. Physical Review Letters, American Physical Society, 2013, 111 (15), pp.154301. ⟨10.1103/PhysRevLett.111.154301⟩. ⟨hal-01727341⟩



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