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Selected Papers from the 6th International Conference on the Physics...
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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

A special issue of Crystals (ISSN 2073-4352).

Deadline for manuscript submissions: closed (30 April 2023) | Viewed by 6590

Special Issue Editors

Dr. Željka Antić

E-Mail Website
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
Special Issues, Collections and Topics in MDPI journals
Dr. Aleksandar Ćirić

E-Mail Website1 Website2
Guest Editor
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

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Crystals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2100 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

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

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Published Papers (3 papers)

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Research

10 pages, 3068 KiB  
Article
Crucible-Free Growth of Bulk b-Ga2O3 Single-Crystal Scintillator under Oxidizing Atmosphere
by Kei Kamada, Rei Sasaki, Taketoshi Tomida, Isao Takahashi, Masao Yoshino, Takahiko Horiai, Rikito Murakami, Vladimir Kochurikhin, Yasuhiro Shoji, Koichi Kakimoto and Akira Yoshikawa
Crystals 2023, 13(6), 921; https://doi.org/10.3390/cryst13060921 - 8 Jun 2023
Cited by 6 | Viewed by 2346
Abstract
β-Ga2O3 is a well-known semiconductor material for power devices and other applications. Recently, β-Ga2O3 has also been reported as a scintillator material with a light yield of approximately 8400 ph./MeV, scintillation decay time of <1 μs, and [...] Read more.
β-Ga2O3 is a well-known semiconductor material for power devices and other applications. Recently, β-Ga2O3 has also been reported as a scintillator material with a light yield of approximately 8400 ph./MeV, scintillation decay time of <1 μs, and density of 6.44 g/cm3. In this study, 45 cm diameter β-Ga2O3 single crystals were prepared via oxide crystal growth using the cold crucible (OCCC) method under various oxygen partial pressures. In the OCCC method, as in the cold crucible method, a high frequency is applied directly to the oxide materials, which are heated and melted, and the melt is held by the outermost solid material itself that is cooled by water using a copper hearth. In the OCCC method, crystal growth is performed while rotating the seed crystal, as in the Czochralski method, to increase the crystal diameter. The optical properties and radiation responses of the crystals grown under various oxygen partial pressures were evaluated. 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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10 pages, 7938 KiB  
Article
Fabrication and Characterization of K2CeCl5/6LiCl and CeCl3/SrCl2/6LiCl Eutectics for Thermal Neutron Detection
by Ryuga Yajima, Kei Kamada, Masao Yoshino, Yui Takizawa, Naoko Kutsuzawa, Rei Sasaki, Takahiko Horiai, Rikito Murakami, Kyoung Jin Kim, Vladimir V. Kochurikhin, Akihiro Yamaji, Shunsuke Kurosawa, Yuui Yokota, Hiroki Sato, Satoshi Toyoda, Yuji Ohashi, Takashi Hanada and Akira Yoshikawa
Crystals 2022, 12(12), 1795; https://doi.org/10.3390/cryst12121795 - 9 Dec 2022
Cited by 3 | Viewed by 1475
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, K2CeCl [...] Read more.
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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9 pages, 3019 KiB  
Article
Fabrication of CeCl3/LiCl/CaCl2 Ternary Eutectic Scintillator for Thermal Neutron Detection
by Rei Sasaki, Kei Kamada, Kyoung Jin Kim, Ryuga Yajima, Masao Yoshino, Naoko Kutsuzawa, Rikito Murakami, Takahiko Horiai and Akira Yoshikawa
Crystals 2022, 12(12), 1760; https://doi.org/10.3390/cryst12121760 - 4 Dec 2022
Cited by 2 | Viewed by 1830
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 [...] Read more.
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
(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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