Development of a thermoluminescence and radioluminescence integrated spectrometer
11
Citation
30
Reference
10
Related Paper
Citation Trend
Keywords:
Radioluminescence
Thermoluminescence dating
Abstract Scintillators display radioluminescent properties when irradiated by high‐energy photons and therefore play an essential role in radiation detection. The current inventory of scintillators is overwhelmingly represented by achiral structures, where the radioluminescence propagates isotropically after generation. Herein, we demonstrate that chiral perovskites of (R‐3AP)PbBr 3 Cl⋅H 2 O ( R‐3APP ) and (S‐3AP)PbBr 3 Cl⋅H 2 O ( S‐3APP ) emerge as a new type of scintillator displaying a distinct property of circularly polarized radioluminescence ( CPRL ). A high quantum yield of 27.6 %, high luminescence dissymmetric factors ( g lum ) of 4×10 −2 , and high X‐ray absorption coefficients were observed for these compounds. As proof of concept, we fabricated a polarized scintillator pair by assembling chiral scintillator crystals, which provides a new strategy to attenuate optical crosstalk between the scintillators by precisely controlling the radioluminescence propagation and improves the X‐ray imaging quality at the boundary region.
Radioluminescence
Cite
Citations (17)
Radioluminescence
Cite
Citations (12)
Radioluminescence
Optically stimulated luminescence
Thermoluminescence dating
Cite
Citations (1)
During the interaction of ionising radiation with matter a part of the absorbed energy is transferred to prompt luminescence or fluorescence, another fraction is stored in the form of trapped charge carriers mostly at lattice defect sites, while the rest is dissipated through non-radiative processes. Although the efficiency of the energy storage is one of the most important questions in the investigation of the TL materials, its absolute measurement is difficult, and needs sophisticated calibration procedures. The present paper reports on relative efficiencies of charge trapping vs luminescence production in the most widely used TL dosemeter materials, based on parallel measurements of radioluminescence and thermoluminescence with the same light detection system. In this way it was possible to measure relative yields without geometrical, optical transmittance and detection efficiency corrections. The measured relative thermoluminescence vs radioluminescence yields for several widely used phosphors (LiF, Al2O3, CaSO4 and CaF2) are presented.
Radioluminescence
Optically stimulated luminescence
Charge carrier
Thermoluminescence dating
Cite
Citations (7)
Abstract Scintillators display radioluminescent properties when irradiated by high‐energy photons and therefore play an essential role in radiation detection. The current inventory of scintillators is overwhelmingly represented by achiral structures, where the radioluminescence propagates isotropically after generation. Herein, we demonstrate that chiral perovskites of (R‐3AP)PbBr 3 Cl⋅H 2 O ( R‐3APP ) and (S‐3AP)PbBr 3 Cl⋅H 2 O ( S‐3APP ) emerge as a new type of scintillator displaying a distinct property of circularly polarized radioluminescence ( CPRL ). A high quantum yield of 27.6 %, high luminescence dissymmetric factors ( g lum ) of 4×10 −2 , and high X‐ray absorption coefficients were observed for these compounds. As proof of concept, we fabricated a polarized scintillator pair by assembling chiral scintillator crystals, which provides a new strategy to attenuate optical crosstalk between the scintillators by precisely controlling the radioluminescence propagation and improves the X‐ray imaging quality at the boundary region.
Radioluminescence
Cite
Citations (52)
Abstract Initial data are reported for X-ray induced luminescence and thermoluminescence from a number of compounds of interest for electro-optic applications. The materials used were LiNbO3, LiTaO3, Ba2NaNb5O15 and LiIO3. In general the signals were weak with the strongest features of both radio-luminescence and thermoluminescence occurring in the temperature range 30 to 100 K. The techniques have revealed a number of defect states in each of the materials.
Radioluminescence
Thermoluminescence dating
Atmospheric temperature range
Photostimulated luminescence
Cite
Citations (6)
Radioluminescence
Thermoluminescence dating
Cite
Citations (11)
The performance of a new thin-film Lu2 O3 :Eu scintillator for single-cell radionuclide imaging is investigated. Imaging the metabolic properties of heterogeneous cell populations in real time is an important challenge with clinical implications. An innovative technique called radioluminescence microscopy has been developed to quantitatively and sensitively measure radionuclide uptake in single cells. The most important component of this technique is the scintillator, which converts the energy released during radioactive decay into luminescent signals. The sensitivity and spatial resolution of the imaging system depend critically on the characteristics of the scintillator, that is, the material used and its geometrical configuration. Scintillators fabricated using conventional methods are relatively thick and therefore do not provide optimal spatial resolution. A thin-film Lu2 O3 :Eu scintillator is compared to a conventional 500 μm thick CdWO4 scintillator for radioluminescence imaging. Despite its thinness, the unique scintillation properties of the Lu2 O3 :Eu scintillator allow us to capture single-positron decays with fourfold higher sensitivity, which is a significant achievement. The thin-film Lu2 O3 :Eu scintillators also yield radioluminescence images where individual cells appear smaller and better resolved on average than with the CdWO4 scintillators. Coupled with the thin-film scintillator technology, radioluminescence microscopy can yield valuable and clinically relevant data on the metabolism of single cells.
Radioluminescence
Cite
Citations (36)
Radioluminescence
Crystal (programming language)
Cite
Citations (513)