Compositional engineering of multicomponent garnet scintillators: towards an ultra-accelerated scintillation response

Abstract

Optical, luminescence and scintillation characteristics were studied in garnet-type GAGG single-crystal scintillators grown by the Czochralski method and heavily doped with cerium activator and magnesium codopant at different concentrations. Emission...

A quantum model of charge capture and release onto/from deep traps

“…Another questionable aspect of the classical approach arises when one carries out time and temperature dependent experiments on gamma-ray-excited scintillators. In these experiments, the rise-time of the scintillation flash is reported to vary between 10 ps [57][58][59][60][61][62][63] to 1-10 ns [58,[64][65][66], and being independent of temperature in the range of 80-500 K [65,67]. The scintillation rise time is the time that is required for the cascade of hot charge carriers to thermalize and localize on recombination sites.…”

Nanocrystalline Lead Halide Perovskites to Boost Time‐of‐Flight Performance of Medical Imaging Detectors

“…The former two were chosen as well‐established scintillators currently used in commercial detectors in medicine (e.g., BGO for traditional PET systems and LYSO for the first‐generation of TOF‐PET scanners), [ 2 ] while GAGG has recently been extensively studied as a fast bulk single crystal scintillator attractive for high‐energy physics experiments. [ 26,27 ] We demonstrate that the presence of CsPbBr 3 significantly improves the overall detector time resolution under soft X‐ray excitation compared to the solely single crystals. Similar results were also obtained under 511 keV for the heterostructure unit made of CPB on GAGG.…”

A quantum model of charge capture and release onto/from deep traps

“…16,50,51,53,56 Another questionable aspect of the classical approach arises when one carries out time and temperature dependent experiments on gamma-ray-excited scintillators. In these experiments, the rise-time of the scintillation flash is reported to vary between 10 ps [57][58][59][60][61][62][63] and 1-10 ns, 58,[64][65][66] and is independent of temperature in the range of 80-500 K. 65,67 The scintillation rise time is the time that is required for the cascade of hot charge carriers to thermalize and localize on recombination sites. The loss of energy and thermalization of hot carriers occur very rapidly (ops), and the rest of the time is spent by the capture of thermalized carriers on the recombination sites.…”