Particle detection at cryogenic temperatures with undoped CsI
arXiv:1709.04020 · doi:10.1016/j.nima.2018.05.066
Abstract
Scintillation at cryogenic temperatures can give rise to detectors with particle discrimination for rare-event searches such as dark matter detection. We present time-resolved scintillation studies of Caesium Iodide (CsI) under excitation of both alpha and gamma particles over a long acquisition window of 1 ms to fully capture the scintillation decay between room temperature and 4 K. This allows a measurement of the light yield independent of any shaping time of the pulse. We find the light yield of CsI to increase up to two orders of magnitude from that of room temperature at cryogenic temperatures, and the quenching factor of alpha to gamma excitation to exceed 1 over a range of temperatures between 10 and 100 K. We also find the time structure of the emitted light to follow similar exponential decay time constants between alpha and gamma excitation, with the temperature behaviour consistent with a model of self-trapped exciton de-excitation.
arXiv comment23 pages, 8 figures
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Cited by in corpus (5)
- Coherent Elastic Neutrino-Nucleus Scattering at the European Spallation Source
- Response of undoped cryogenic CsI to low-energy nuclear recoils
- Prospect of undoped inorganic crystals at 77 Kelvin for low-mass dark matter search at Spallation Neutron Source
- Development and characterization of a slow wavelength shifting coating for background rejection in liquid argon detectors
- Investigation of the cryogenic scintillation of pure and doped sodium-iodine