Luminescence and scintillation properties of CsI -- a potential cryogenic scintillator

Abstract

Caesium iodide is one of the more extensively studied scintillators. Here we present X-ray luminescence spectra, scintillation light output and decay curves as function of temperature, from room temperature down to below 10 K. Features of the observed intrinsic luminescence are explained in terms of radiative recombination of on- and off-centre STE. A model permitting interpretation of the dynamics of luminescence changes in CsI with temperature is suggested. This model includes adiabatic potential energy surfaces (APES) associated with singlet and triplet states of self-trapped excitons (STE) and explains the variation of the luminescence spectra with temperature as a result of re-distribution in the population between on- and off-centre STE. The temperature dependence of the scintillation light yield is discussed in the framework of the Onsager mechanism.

References in corpus (3)

• New Limits on Interactions between Weakly Interacting Massive Particles and Nucleons Obtained with CsI(Tl) Crystal Detectors
• Performance of scintillation materials at cryogenic temperatures
• Potential of a next generation neutrinoless double beta decay experiment based on ZnMoO4 scintillating bolometers

Cited by in corpus (12)

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• Particle detection at cryogenic temperatures with undoped CsI
• Sensitivity of alkali halide scintillating calorimeters with particle identification to investigate the DAMA dark matter detection claim
• First operation of undoped CsI directly coupled with SiPMs at 77 Kelvin
• Prospect of undoped inorganic crystals at 77 Kelvin for low-mass dark matter search at Spallation Neutron Source
• CE$\nu$NS Experiment Proposal at CSNS
• Characterization and Optimization of a Cryogenic Pure CsI Detector with Remarkable Light Yield and Unprecedented Energy Resolution for CLOVERS Experiment
• Characterization of SiPMs at 40 K for neutrino coherent detection based on pure CsI
• Cryogenic cesium iodide as a potential PET material