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Asymmetry effect on luminescence behaviors phospho-tellurite glass doped Eu3+: Judd-Ofelt analysis and EXAFS investigations

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Ceramics International 2025年

作者： Thanyaphirak, W. Yasaka, P. Boonin, K. Busayaporn, W. Tariwong, Y. Intachai, N. Kothan, S. Kim, H.J. Kaewkhao, J. Physics Program Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand Synchrotron Light Research Institute Nakhon Ratchasima30000 Thailand Center of Radiation Research and Medical Imaging Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai50200 Thailand Department of Physics Kyungpook National University Daegu41566 Korea Republic of

This study systematically investigated the influence of soaking time on the structural, optical, and luminescence properties of Eu3+- doped phospho-tellurite glass. The results indicate that varying soaking times significantly alter the glass network, resulting in structural modifications that directly impact emission intensity. The highest emission intensity was observed at a soaking time of 1.5 h. This result also revealed that the trend in emission intensity is related to the Debye-Waller factor (σ2), which quantifies the disorder surrounding the Eu3+ ion, thereby confirming increased asymmetry around the Eu3+ ion. Other parameters, such as Ω2 and the electric dipole/magnetic dipole (ED/MD) transition ratio, were also observed to follow a similar trend, consistent with the Judd-Ofelt theory. Furthermore, scintillation efficiency and Urbach's energy exhibited similar trends. While these parameters are not directly related to the asymmetry level around the Eu3+ ion, asymmetry is one contributing factor to their values. This finding can be used for designing glass fabrication to enhance emission efficiency for photonics material application. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Judd-Ofelt theory

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Comparison of Calcified Plaque Volume in Coronary Arteries using Filtered Back Projection and Intelli IP Advanced at CT-scan 128 Slice

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International Journal Bioautomation 2023年第1期27卷 15-24页

作者： Pratama, Naufal Arya Muqmiroh, Lailatul Sari, Amillia Kartika Ferriastuti, Widiana Syivasari, Falentina Muhaimin Prassetyo, Sidarta Nguyen, Cong Tien Phuong, Phan Anh Luu, Vu Dang Radiologic Imaging Technology Program Faculty of Vocational Studies Airlangga University Surabaya Indonesia Department of Radiology Faculty of Medicine Airlangga University Surabaya Indonesia Department of Radiology Mitra Keluarga Hospital Surabaya Indonesia Faculty of Vocational Studies Airlangga University Surabaya Indonesia Department of Radiology Bach Mai Hospital Hanoi Viet Nam

Calcified plaque has a major effect on increasing plaque volume which can increase the risk of Coronary Artery Disease (CAD). The use of Filtered Back Projection (FBP) on CT-scans still has flaws in terms of image quality that can result in errors in the calculation of plaque volume. Intelli IP Advanced is hitachi CT-scan’s Iterative Reconstruction (IR) type and can improve image quality compared to FBP. The purpose of this study is to find out the comparison of calcified plaque volume in coronary arteries using FBP and Intelli IP Advanced. This study used 38 samples of coronary artery blood vessels that had calcified plaque and reconstructed using the reconstruction of FBP and Intelli IP Advanced algorithms (Levels 1-3). Plaque calculation is done automatically using aquarius intuition edition application on CT-scan Hitachi SCENARIA 128 Slice. The results in this study found significant differences (p © 2023 by the authors. Licensee Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://***/licenses/by/4.0/)

关键词： Computerized tomography

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Enhancement of stimulated emission in Eu3+ activated oxyfluoroborotellurite glasses for reddish orange laser material

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Optik 2023年第1期289卷

作者： Meejitpaisan, P. Kothan, S. Donbunthai, S. Kim, H.J. Kaewkhao, J. Physics Program Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand Center of Radiation Research and Medical Imaging Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai50200 Thailand Department of Physics Kyungpook National University Daegu41566 Korea Republic of

Eu3+ activated oxyfluoroborotellurite glasses are enhancement stimulated emission by substitution of B2O3 with NaF whereas concentration of Eu3+ are fixed at 1.00 mol%. The present glasses have been prepared by melt quenching method. Seven absorption bands of present glasses have been observed in UV–VIS and NIR regions which originated from ground 7F0 and thermally populated 7F1 states to excited states. The absorption transitions of 7F0→5L6 and 7F0→7F6 were more intense compared to all transitions. The substitution of B2O3 with NaF has led to minor change absorption intensities. By stimulating with 395 nm, the emission spectra of present glasses exhibited four peaks which corresponding to 5D0→7F1,2,3,4 transitions. The transition of 5D0→7F2 showed the highest emission intensity. The substitution of B2O3 with NaF can enhance emission intensity due to the reduction of hydroxyl group. While the highest emission intensity has been found to be 35 mol% of NaF concentration. The absorption and emission results have been calculated stimulated emission by using Judd-Ofelt (JO) theory. The stimulated emission is found to be 109.1 × 10–21 cm2. Including the branching ratio is higher than 0.50. In the frame of chromaticity color coordinate which the present glasses are fallen in the reddish orange region. The results indicate that Eu3+ activated oxyfluoroborotellurite glasses could be used potentially for reddish orange laser material. © 2023 Elsevier GmbH

关键词： Stimulated emission

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Synthesis and optical behavior of neodymium ion doped borophosphate glass for laser applications

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Optik 2023年 291卷

作者： Kiwsakunkran, N. Chanthima, N. Kothan, S. Kim, H.J. Kaewkhao, J. Physics Program Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand Center of Radiation Research and Medical Imaging Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai50200 Thailand Department of Physics Kyungpook National University Daegu41566 Korea Republic of

Nd3+ ion doped lithium aluminum gadolinium borophosphate glasses were synthesized by melt quenching technique. The hypersensitive transitions were identified in the absorption spectra for ultraviolet (UV), visible (Vis) and near infrared (NIR) region, which the highest intensity is recorded at the transitions 4I9/2→4D5/2, 4I9/2→4G5/2 and 4I9/2→4F5/2 with wavelengths of 352, 582 and 804 nm, respectively. The spectroscopic properties of emission spectra in Nd3+ doped present glasses were investigated under 808 nm laser excitation and shows the strongest intensity at 1063 nm, which corresponding the transition 4F3/2→4I11/2. Furthermore, JO parameters (Ω2, Ω4 and Ω6) are produced, which are then utilized to examine the radiative characteristics of Nd3+ doped glasses for example radiative transition probability (AR), radiative lifetimes (τrad), branching ratios (β), gain bandwidth (Δλeff×σe), optical gain (σe×τrad) and emission cross-section (σe). The results demonstrated that the LBPNd0.5 glass might be used in laser applications around 1.058 µm region, which represent highest stimulated emission cross-section (53.49 ×10–21 cm2), higher branching ratio (>0.5), highest quantum efficiency (84.58%), lower non-radiative decay rates (720 s−1) compared with other glasses. © 2023 Elsevier GmbH

关键词： Emission spectroscopy

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Response function and photon interaction of LaBr3:Ce and BGO scintillation detectors by Monte Carlo simulation

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Optik 2023年第1期289卷

作者： Mutuwong, C. Bootjomchai, C. Chaiphaksa, W. Yonphan, S. Kothan, S. Kaewkhao, J. Department of Physics Faculty of Science Ubon Ratchathani University Warin Chamrap Ubon Ratchathani34190 Thailand Physics Program Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand Center of Radiation Research and Medical Imaging Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai50200 Thailand

This work aims to investigate the response function and photon interaction of the LaBr3:Ce and BGO scintillation detectors using the FLUKA Monte Carlo simulation software. To improve the realism of detectors, the DETGEB card was used to activate the gaussian energy broadening (GEB) function. The GEB parameters of both detectors were obtained by fitting a nonlinear curve to the relation between FWHM and gamma-ray energy. The energy resolution (R), peak-to-Compton ratio (PCR), peak-to-total ratio (PTR), and full-energy peak efficiency (FEPE) of both detectors were investigated by simulation and experiment at different gamma-ray energy obtained from 133Ba, 137Cs, and 60Co sources. The simulated spectra of those radioisotopes were found to agree with the actual spectra. The results found that the R, PCR, and FEPE values of the LaBr3:Ce and BGO detectors tend to decrease as energy increases. Moreover, the total atomic cross-section (σt,a), effective atomic number (Zeff) and effective electron density (Neff) of both crystals was investigated by FLUKA and compared with the XCOM theoretical program covering an energy range of 15 keV to 15 MeV. The simulated results of the σt,a, Zeff, and Neff are in excellent agreement with the theoretical ones. The GEB parameters obtained from this study will improve the simulation performance of LaBr3:Ce and BGO detectors in investigating the gamma-ray response and shielding properties of materials. © 2023 Elsevier GmbH

关键词： Monte Carlo methods

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The effect of calcium and barium fluoride on CeF3 doped in gadolinium phosphate scintillating glass

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Ceramics International 2025年

作者： Sarumaha, C.S. Kantuptim, P. Yanagida, T. Intachai, N. Kothan, S. Kim, H.J. Busayaporn, W. Pakawanit, P. Phoovasawat, C. Kaewnuam, E. Kaewkhao, J. Faculty of Science and Technology Muban Chombueng Rajabhat University Ratchaburi 70150 Thailand Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand Department of Materials Engineering Faculty of Engineering Kasetsart University Bangkok10900 Thailand Division of Materials Science of Science and Technology Nara Institute of Science and Technology 8916-5 Takayama Ikoma Nara630-0192 Japan Center of Radiation Research and Medical Imaging Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai50200 Thailand Department of Physics Kyungpook National University Daegu41566 Korea Republic of Synchrotron Research and Applications Division Synchrotron Light Research Institute 111 University Avenue Muang District Nakhon Ratchasima30000 Thailand Physics Program Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand

This study concerns alkaline fluorides such as CaF2 and BaF2 contained in gadolinium phosphate glass doped with CeF3, which were synthesized using a melt-quenching technique. Ce3+ was activated in both glasses and a comparative study of their optical, luminescence and scintillation behaviors was conducted. The results found that the higher atomic weight of BaF2 glass makes higher density compared with CaF2 glass, resulting in more integral scintillation efficiency. The quantum yield of BaF2-glass (PLZGdBafCe0.5) is also higher than that of CaF2-glass (PLZGdCafCe0.5). Energy transfer efficiency from Gd3+ to Ce3+ shows similar values, reflecting that the higher photoluminescence intensity of BaF2-glass comes from the efficiency of the luminescence center (Ce3+ ion). Photoluminescence and scintillation decay times were measured and found to be in the range of nanoseconds. XANES measurement was used to confirm the oxidation state and ratio between Ce3+/Ce4+. Moreover, the practical application of the glass scintillator was succeeded by micro-imaging using synchrotron X-ray. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Photoluminescence

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Optical Properties of Eu3+/Dy3+ Ion Co-Doped Teo2 - B2o3 - Cao - Al2o3 Glass and its Potential for Solar Energy Harvesting

SSRN

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SSRN 2023年

作者： Yuliantini, Lia Nursam, Natalita Maulani Firdaus, Yuliar Pranoto, Lia Muliani Shobih, Shobih Hidayat, Jojo Djamal, Mitra Sova, Rimbi Rodiyana Almuqoddas, Erdin Yasaka, Patarawagee Boonin, Kitipun Kothan, S. Kaewkhao, J. Bandung40135 Indonesia Department of Physics Faculty of Mathematics and Natural Sciences Bandung Institute of Technology Bandung40132 Indonesia Bandung Institute of Technology Bandung40132 Indonesia Physics Program Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand Center of Radiation Research and Medical Imaging Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai50200 Thailand

Solar-pumped laser (SPL) is an alternative way to enhance solar energy harvesting, where the sunlight is directly converted to the laser beam and then specifically targeted to irradiate a solar cell device. As an essential part of the SPL system, a glass-based optical gain medium is required to create amplified emission light. In the present work, we reported glass fabrication using a melt and quenching technique with a composition of (40-x) TeO2 + 39 B2O3 + 10 CaO + 10 Al2O3 + 1 Dy2O3 + x Eu2O3 so-called xEu/Dy glass, where x = 0.0, 0.1, 0.3, 0.5, 1.0, and 3.0 mol%. From the absorption spectra, we find that xEu/Dy glasses have various wavelength from ultraviolet to infrared that is comparable with solar spectra. Meanwhile, the emission spectra of glass show several peaks in the visible region including 480, 579, 590, 614, 652, and 699 nm belonging to Eu3+ and Dy3+ emission bands under λex = 395 nm. These emission lines are found similar to emission spectra under Dy3+ ion excitation λex = 388 nm as well as the X-ray induced luminescence spectra. The CIE 1931 color coordinate is found to shift from yellow to the reddish-orange region along with their CCT coordinate under different excitation wavelengths. Our investigation shows that the emission spectrum of 3.0Eu/Dy glass overlapped with the absorption band of dye, organic, and perovskite photosensitizers. Our results demonstrate the feasibility of present glass for optical gain medium in SPL particularly to be integrated with third-generation solar cells. © 2023, The Authors. All rights reserved.

关键词： Glass

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A Pre-Post Evaluation of an Interprofessional Education (IPE) Skill Sharing Workshop

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American Journal of Pharmaceutical Education 2024年第9期88卷

作者： Shelby P. Brooks Hanna Rotundo Rebecca Hamm Jordan Anderson Jessica Lasiter Ashley Barbo The University of Louisiana at Monroe University of Louisiana at Monroe College of Pharmacy University of Louisiana at Monroe College of Health Sciences -Radiologic Technology Program University of Louisiana at Monroe College of Health Sciences

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Synthesis and radiation properties of Li 2 O-BaO-Bi 2 O 3 -P 2 O 5 glasses

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Materials Today: Proceedings 2021年 43卷 2544-2553页

作者： S. Kaewjaeng N. Chanthima J. Thongdang S. Reungsri S. Kothan J. Kaewkhao Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai 50200 Thailand Physics Program Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom 73000 Thailand Center of Excellence in Glass Technology and Materials Science (CEGM) Nakhon Pathom Rajabhat University Nakhon Pathom 73000 Thailand Chemistry Program Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom 73000 Thailand

The effects of BaO on the radiation properties of Li 2 O-BaO-Bi 2 O 3 -P 2 O 5 glasses, where x = 10, 15, 20, 25 and 30 mol%, have been studied. The glasses were synthesized by the conventional melt-quenching technique at 1000 °C for 2 hours using (NH 4 ) 2 HPO 4 , Li 2 CO 3 , Ba 2 CO 3 and Bi 2 O 3 as starting materials. The visual inspections of all synthesized glasses with different concentration of BaO and Bi 2 O 3 have a good optical transparency. The radiation parameters of the glasses have been measured experimentally and compared with those determined from theoretical calculation using WinXCom program. The results show that the mass attenuation coefficient was decreased with increasing of BaO concentration owing to the decrease of photoelectric absorption. However, Compton scattering gives the dominant contribution to the total mass attenuation coefficient for studied glass samples. The mass attenuation coefficients ( μ m ), the effective atomic numbers ( Z eff ), and the effective electron densities ( N e ) were decreased with the increase of BaO concentrations. The synthesized glasses were investigated and compared with the shielding concretes and glasses in terms of half value layer ( HVL ). The HVL value of synthesized glasses shows better than some shielding concretes with an advantage of being transparent to visible light

关键词： Mass attenuation coefficients Effective atomic numbers Effective electron densities Phosphate glass

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Development of bismuth sodium borate glasses for radiation shielding material

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Materials Today: Proceedings 2021年 43卷 2508-2515页

作者： W. Cheewasukhanont P. Limkitjaroenporn S. Kaewjaeng W. Chaiphaksa W. Hongtong J. Kaewkhao Physics Program Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom 73000 Thailand Center of Excellence in Glass Technology and Materials Science (CEGM) Nakhon Pathom Rajabhat University Nakhon Pathom 73000 Thailand Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai 50200 Thailand

Glass samples of the bismuth sodium borate (where x = 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, and 50 mol%) have been prepared in laboratory by melt quenching technique. The radiation shielding properties including the mass attenuation coefficient, the effective atomic number, the effective electron density and the half value layer (HVL) of glass samples have been measured by using the gamma ray from radioactive source Ba-133, Na-22, Cs-137 and Co-60 at the energies 356, 511, 662, 1173 and 1332 keV for these experiment and those were compared with theoretical approach by WinXCom program. The results found that, the mass attenuation coefficient, effective atomic number, and effective electron density were increased with the increase of Bi 2 O 3 concentrations, and those values were decreased with the increasing of gamma-ray energies. The glasses in this work showed good radiation shielding properties by providing less the HVL than some standard shielding materials at 662 keV of gamma ray

关键词： Bi 2 O 3 glass Mass attenuation coefficient Effective atomic number Effective electron density HVL

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