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Guest Editor

Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
Interests: luminescence; luminescence thermometry; phosphors; advanced optical materials; sensors
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Dr. Aleksandar Ćirić

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Vinča Institute of Nuclear Sciences – National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia
Interests: luminescence; thermometry; material characterization; photonics; phosphors

Special Issue Information

Dear Colleagues,

The 6th International Conference on the Physics of Optical Materials and Devices—ICOM2022 and the 5th International Workshop of Persistent and Photostimulable Phosphors—IWPPP5 will be held from 29 August to 2 September 2022 in Belgrade, Serbia www.icomonline.org. The event is organized by the Society for Science Development of Serbia (Serbia); Extreme Conditions and Materials: High Temperature and Irradiation—CEMHTI (France) and Centre national de la recherche scientifique—CNRS (France). The event emphasizes the importance of a basic scientific understanding of optical materials and persistent and photostimulable phosphors. Particular emphasis is placed on the wide bandgap materials in crystalline, glass, and nanocrystalline forms, as well as optical properties of rare earth and transition metal ions used as dopants in different hosts. The applications mainly involve lasers, scintillators, phosphors, and optical sensors. The event addresses all aspects of temperature measurements using thermographic phosphors, including synthesis, characterization, calibration, measurement techniques development, instrumentation, and data processing, as well as applications in industry, fundamental research, and biomedicine. Further, the characterization, control, measuring, and quantification of persistent/photostimulable luminescence will be discussed. This Special Issue contains selected contributions of participants of the ICOM2022 conference and IWPPP5 workshop.

Dr. Željka Antić
Dr. Aleksandar Ćirić
Guest Editors

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Keywords

advanced optical materials and their characterization
new luminescent materials, synthesis techniques, and phenomena
luminescence mechanisms and energy transfers, theory, and modeling of optical processes
luminescence thermometry
physical, chemical, and biological sensing using optical methods
medical imaging and bioimaging
lasers and amplifiers, LEDs and OLEDs, plasmonic light sources, photovoltaics
photothermal and photoacoustic spectroscopy and phenomena
persistent and photostimulable phosphors
measuring, quantification, and control of persistent/photostimulable luminescence

Published Papers (2 papers)

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Research

Open AccessArticle

Fabrication and Characterization of K₂CeCl₅/⁶LiCl and CeCl₃/SrCl₂/⁶LiCl Eutectics for Thermal Neutron Detection

Vladimir V. Kochurikhin

and

Crystals 2022, 12(12), 1795; https://doi.org/10.3390/cryst12121795 - 09 Dec 2022

Viewed by 567

Abstract

In recent years, thermal neutron detection using scintillators has been used in a wide range of fields. Thus, the development of scintillators with a higher light yield, faster decay, and higher sensitivity for thermal neutrons is required. In this study, K₂CeCl₅/⁶LiCl and CeCl₃/SrCl₂/⁶LiCl were developed as novel eutectic scintillators for thermal neutron detection. LiCl was selected as the neutron capture phase and K₂CeCl₅ and CeCl₃ were used as the scintillator phases. The eutectics of K₂CeCl₅/⁶LiCl and CeCl₃/SrCl₂/⁶LiCl were prepared using the Vertical Bridgman method and the phases were identified by scanning electron microscopy and powder X-ray diffraction measurements. The results of radioluminescence measurements under Ag source X-ray tube irradiation confirmed that the 5d-4f emission derived from Ce³⁺. The cathodoluminescence spectra and thermal neutron responses of the prepared eutectics were measured to evaluate their optical properties. Full article

(This article belongs to the Special Issue Selected Papers from the 6th International Conference on the Physics of Optical Materials and Devices and the 5th International Workshop of Persistent and Photostimulable Phosphors)

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Open AccessArticle

Fabrication of CeCl₃/LiCl/CaCl₂ Ternary Eutectic Scintillator for Thermal Neutron Detection

and

Crystals 2022, 12(12), 1760; https://doi.org/10.3390/cryst12121760 - 04 Dec 2022

Viewed by 827

Abstract

To date, ³He gas has been commonly used to detect thermal neutrons because of their high chemical stability and low sensitivity to γ-rays, owing to their low density and large neutron capture cross-section. However, the depletion of ³He gas prompts the development of a new solid scintillator for thermal neutron detection to replace ³He gas detectors. Solid scintillators containing ⁶Li are commonly used to detect thermal neutrons. However, they are currently used in single crystals only, and their ⁶Li concentration is defined by their chemical composition. In this study, ⁶Li-containing eutectic scintillators were developed. CeCl₃ was selected as the scintillator phase because of its low density (3.9 g/cm³); high light yield (30,000 photons/MeV); and fast decay time with four components of 4.4 ns (6.6%), 23.2 ns (69.6%), 70 ns (7.5%) and >10 μs (16.3%), owing to the Ce³⁺ 5d-4f emission peak at approximately 360 nm. Crystals of the CeCl₃, LiCl and CaCl₂ ternary eutectic were fabricated by the vertical Bridgman technique. The grown eutectic crystals exhibited Ce³⁺ 5d-4f emission with a peak at 360 nm. The light yield was 18,000 photons/neutron, and the decay time was 10.5 ns (27.7%) and 40.1 ns (72.3%). Therefore, this work demonstrates optimization by combining a scintillator phase and Li-rich matrix phase for high Li content, fast timing, high light yield and low density. Full article

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Special Issue "Selected Papers from the 6th International Conference on the Physics of Optical Materials and Devices and the 5th International Workshop of Persistent and Photostimulable Phosphors"

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