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SSRN 2022年

作者： Khan, Inamullah Shoaib, M. Chanthima, N. Qiao, Fen Rooh, G. Kaewkhao, J. Kothan, S. Kiwsakunkran, N. Rawalpindi Women University Rawalpindi43600 Pakistan Department of Physics Abdul Wali Khan University Mardan23200 Pakistan Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand Physics Program Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand School of Energy and Power Engineering Jiangsu University Jiangsu Zhenjiang212013 China Center of Radiation Research and Medical Imaging Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai50200 Thailand

In this work, we carry out a comparative investigation of properties for 17Li₂O:17Gd2O3:(66-x) P2O5:xCeF3 (GdO-CeF) and 17Li2O:17GdF3:(66-x)P2O5:xCeF3 (GdF-CeF) glasses, where x = 0.00, 0.05, 0.1, 0.5, 1.0 and 2.0 in mol %. The density of the present glasses shows an increasing trend with the increasing concertation of the CeF3, while the molar volume decreases. we also find that the GdO-CeF glasses have a higher density than the GdF-CeF glasses. The luminescence intensity increases as the CeF3 concentration increases up to 1 mol% and then starts falling. The decreasing trend of the luminescence intensity is due to the cross-relaxation process. It is also noted that GdF-CeF glasses show comparatively higher emission intensity than GdF-CeF glasses. The enhancement of the luminescence intensity attribute to the lower phonon energy and lower concertation of the HO group. The FTIR spectroscopy confirms that GdF-CeF glasses have lower OH content, because the band attributed to the OH group shows lower intensity as compared to the GdO-CeF glasses. Moreover, the integral scintillation efficiency of present glasses were calculated and were compared to the BGO crystal. From the results, it is found that the GdF-CeF glass show higher efficiency compared to GdF-CeF glass. The performance of Ce ions in the present glasses demonstrates that GdF-CeF glass has the potential to be a candidate for scintillation applications. © 2022, The Authors. All rights reserved.

关键词： Rare earths

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White light emission from Dy 3+ ion doped boro-tellurite glass potential for optical and thermoluminescence material applications

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Radiation Physics and Chemistry 2025年 237卷

作者： S. Khondara P. Yasaka K. Boonin N. Intachai S. Kothan H.J. Kim 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 Center of Radiation Research and Medical Imaging Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai 50200 Thailand Department of Physics Kyungpook National University Daegu 41566 South Korea

This research focuses on the synthesis and characterization of (35-x) TeO 2 : 30B 2 O 3 : 20BaO: 10ZnO: 5La 2 O 3 : xDy 2 O 3 (x is 0.0, 0.1, 0.5, 1.0, and 1.5 mol%) glasses. X-ray diffraction analysis confirmed that the glass was amorphous. Investigation of vibration properties of various glass networks using Fourier transform infrared spectroscopy. In addition, the UV–vis–NIR spectrometer recorded the absorption spectra of a number of peak values. The glass samples exhibited strong photoluminescence (PL) spectra with two prominent emission bands at 482 nm and 576 nm, corresponding to the characteristic transitions of Dy 3+ ion. The highest luminescence efficiency of Dy 3+ ion was observed at a concentration of 1 mol%. In the prepared glasses, the PL obtained from different concentrations of Dy 3+ ion is almost close to the white light region, as shown in the CIE 1931 chromaticity diagram. Furthermore, the thermoluminescence (TL) parameters were calculated, including the maximum temperature (T m ), high-temperature half-width (δ), low-temperature half-width (τ), total half-intensity width (ω), activation energy (E), and frequency factor (S). The developed glasses show promise for use in thermoluminescence dosimetry (TLD) and white light-emitting diodes (WLEDs) based on the results.

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Investigation physical and radiation shielding properties of boro-coconut shell ash-bismuth glass systems

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Radiation Physics and Chemistry 2025年 236卷

作者： S. Ravangvong P. Glumglomchit K. Sriwongsa S. Kaewjaeng O. Ornketphon W. Cheewasukhanont W. Chaiphaksa S. Yonphan C. Mutuwong S. Kothan J. Kaewkhao Division of Science and Technology Faculty of Science and Technology Phetchaburi Rajabhat University Phetchaburi 76000 Thailand Huahinvitthayalai School Hua–Hin Prachuap Khiri Khan 77110 Thailand The Demonstration School of Silpakorn University Nakhon Pathom 73000 Thailand Education Program in Physics Faculty of Education Silpakorn University Nakhon Pathom 73000 Thailand Center of Radiation Research and Medical Imaging Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai 50200 Thailand Office of Research Administration 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

The boro-coconut shell ash-bismuth glass (CSA) systems in compositions (50-x)CSA + 20Na 2 O + 10CaO + 20B 2 O 3 + xBi 2 O 3 (where x = 0, 5, 10, 15, 20 and 25 mo...

The boro-coconut shell ash-bismuth glass (CSA) systems in compositions (50-x)CSA + 20Na 2 O + 10CaO + 20B 2 O 3 + xBi 2 O 3 (where x = 0, 5, 10, 15, 20 and 25 mol%) were prepared using melt quenching method and has been investigated physical and radiation shielding properties. The investigation of their physical properties such as density and refractive index found that both values increased with increasing Bi 2 O 3 content from 2.6002 to 4.0714 g/cm 3 and 1.5528–1.6500, respectively. The X and gamma-rays shielding properties have been investigated and analyzed regarding the mass attenuation coefficient (MAC) and half value layer (HVL). Moreover, the experimental results for gamma-rays were compared with FLUKA Monte Carlo. Additionally, X and gamma-rays shielding characteristics were compared with some materials. It was found that the increasing Bi 2 O 3 content improved X and gamma-rays shielding properties. Moreover, the proton and alpha particles were also explained on shielding properties. The results of this study are useful in increasing the effectiveness of agricultural waste glass materials for shielding X and gamma-rays, the proton and alpha particles.

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Enhancement of gamma and X-ray shielding behaviors in ZnO-B 2 O 3 glasses via La 2 O 3 addition: Experimental and theoretical investigations

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Radiation Physics and Chemistry 2025年 237卷

作者： S. Yabsantia N. Wantana T. Chusin S. Kaewjaeng O. Ornketphon W. Chaiphaksa W. Cheewasukhanont S. Kothan P. Limsuwan J. Kaewkhao Department of Radiological Technology Faculty of Allied Health Sciences Naresuan University Phitsanulok 65000 Thailand Interdisciplinary Health and Data Sciences Research Unit Faculty of Allied Health Sciences Naresuan University Phitsanulok 65000 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 Center of Radiation Research and Medical Imaging Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai 50200 Thailand Office of Research Administration Chiang Mai University Chiang Mai 50200 Thailand Department of Physics Faculty of Science King Mongkut's Institute of Technology Ladkrabang Bangkok 10140 Thailand

Radiation shielding materials are crucial for reducing radiation exposure. Traditional materials such as lead, and concrete pose challenges related to toxicity and lack of transparency. This study aimed to assess the effects of lanthanum oxide (La 2 O 3 ) addition on physical, optical, and radiation shielding properties of ZnO–B 2 O 3 glass systems. Glass samples of (80-x)B 2 O 3 –20ZnO-xLa 2 O 3 (x = 5–20 mol%) were prepared using the melt-quenching technique and characterized for density, molar volume, refractive index, transmittance and X-ray diffraction (XRD). Gamma-ray shielding performance was evaluated using the Compton scattering method with a Cs-137 source and NaI(Tl) detector, alongside theoretical data from WinXCOM. X-ray shielding capabilities were determined through experimental transmission measurements and Monte Carlo simulations (PHITS) across effective energies ranging from 30.40 to 44.21 keV. Increasing La 2 O 3 content (5–20 mol%) resulted in higher density (2.89–3.63 g/cm 3 ), slightly increased molar volume (29.37–33.98 cm 3 /mol), and higher refractive index (1.58–1.65). All La 2 O 3 -added glasses exhibited ∼75 % transmittance in the visible region. XRD analysis indicated amorphous characteristics for all samples. For gamma rays, both experimental and theoretical results agreed well, showing improved shielding with higher La 2 O 3 levels. For lowest gamma-ray energy, the 20 mol% sample had the highest mass attenuation coefficient (μ m ) of 0.21 cm 2 /g, lowest half value layer (HVL) of 0.89 cm, and shortest mean free path (MFP) of 1.29 cm. For X-rays, PHITS simulations and experiments also aligned, with μ m up to 4.21 cm 2 /g (at 30.40 keV), HVL of 0.05 cm, and MFP of 0.07 cm. These findings suggest that La 2 O 3 addition enhances both gamma and X-ray shielding effectiveness. In conclusion, the study highlights the potential of La 2 O 3 -added ZnO–B 2 O 3 glass as an alternative shielding material, with future research aimed at further improvi

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Hybrid detectors for high-energy radiation based on borosilicate glass scintillator doped with Gd 3+ covered by photosensitive TiO 2 layer

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Radiation Physics and Chemistry 2025年

作者： P. Mangthong M. Kohout C.S. Ponseca Z. Hubička J. Kaewkhao S. Kothan K. Kirdsiri N. Srisittipokakun J. Olejníček M. Cadatal-Raduban Physics Program Faculty of Science and Technology Nakhon Pathom Rajabhat University 73000 Thailand Center of Excellence in Glass Technology and Materials Science (CEGM) Nakhon Pathom Rajabhat University Nakhon Pathom 73000 Thailand Department of Low Temperature Plasma Institute of Physics of the Czech Academy of Sciences Na Slovance 1999/2 182 21 Prague 8 Czech Republic Department of Mathematics and Natural Sciences Gulf University for Science and Technology Hawally Kuwait Department of Physics School of Science and Engineering Ateneo De Manila University 1004 Manila Philippines Center of Radiation Research and Medical Imaging Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai 50200 Thailand Unitec Institute of Technology 139 Carrington Road Mount Albert Auckland 1025 New Zealand Institute of Laser Engineering Osaka University 2-6 Yamadaoka Suita Osaka 565-0871 Japan

Vacuum ultraviolet (VUV) radiation, ranging from 100 to 200 nm (6.2 – 12.4 eV), is essential for applications in photonics, plasma diagnostics, and high-energy radiation monitoring. This study presents a hybrid VUV detector composed of a Gd 2 O 3 -doped borosilicate glass scintillator coated with a 250 nm titanium dioxide (TiO 2 ) film. Borosilicate glass was selected for its high thermal stability, chemical durability, and rare-earth compatibility. The TiO 2 a band gap near 3.2 eV layer, deposited via DC magnetron sputtering, acts as a photoconductive material that directly converts the 311 nm, approximately 3.99 eV photoluminescence emission from Gd 3+ into an electrical signal, eliminating the need for a separate photodetector. Substrate heating during deposition and post-deposition annealing significantly improved the crystallinity of the TiO 2 layer, enhancing photosensitivity without degrading the luminescence of the underlying scintillator. The selected film thickness ensures good photon absorption and surface uniformity while avoiding charge carrier recombination losses. Furthermore, The system demonstrates successful detection of 172 nm VUV radiation via direct luminescence to current conversion. This hybrid device provides a compact, integrated for high-energy radiation detection, with potential applications in dosimetry and future VUV or x-ray optoelectronic systems.

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Estimation of Occupational Eye Lens Dose in Nuclear Medicine: A Monte Carlo Study

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Journal of Medical Imaging and Radiation Sciences 2022年第4期53卷 S29-S29页

作者： Morhrasi, Pakjira Jumpee, C Charoenphun, P Chuamsaamarkkee, K Master of Science Program in Medical Physics Department of Diagnostic and Therapeutic Radiology Faculty of Medicine Ramathibodi Hospital Mahidol University Bangkok Thailand Division of Nuclear Medicine Department of Diagnostic and Therapeutic Radiology Faculty of Medicine Ramathibodi Hospital Mahidol University Bangkok Thailand Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai Thailand

IntroductionThe radiation workers in nuclear medicine are involved with unsealed radioactive source. The measurement of eye lens dose using dosimeter could lead to significant error and uncertainties. Therefore, this study aims to estimate the eye lens dose of the radiation workers in nuclear medicine using Monte Carlo (MC) simulation. MethodsIn this work, MC simulations were performed using MCNP5. The measured Hp(3) using NanoDot TM in cylindrical phantom with 60Co and 137Cs standard sources were conducted to validate MCNP code. Additionally, the simulated air kerma rate constants have been validated using commonly used radionuclides including 18F, 99mTc and 131I. Then, the validated MCNP code was used to estimate the eye lens at distance of 10 to 50 cm from eye level of PIMAL phantom. ResultsThe percentage error of experimental and simulation results were less than the acceptance limit of 10% for code validation. Then, the clinical source geometries were simulated e.g., 3 mL solution in the 5-mL syringe for 18F, 1 mL solution in the 3-mL syringe for 99mTc and the capsule in the 10-mL vial for 131I. The eye lens doses were increased when the energy of emitted photon increased. Subsequently, 18F provided highest eye lens dose followed by 131I and 99mTc. At 10 cm, the eye lens dose rates were 20.55,7.90 and 2.33 μSv/MBq/hr for 18F, 131I and 99mTc respectively. The eye lens dose rates were decreased when the distance increased as expected. At 50 cm, the eye lens dose rates were dramatically dropped to 1.16, 0.46 and 0.14 μSv/MBq/hr for 18F, 131I and 99mTc respectively. ConclusionThe eye lens dose rates from commonly source geometries and distances were simulated in this work. The values could be used as a caution limit to ensure that no individual is committed to unacceptable risk due to radiation exposure.

关键词： eye lens dose occupational exposure Monte Carlo simulation radiation protection

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Scintillation Properties of Cerium-Doped Tl 2 LaCl 5 Crystal: Investigating the Effects of Size and Cerium Concentration

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Radiation Physics and Chemistry 2025年

作者： Lam Tan Truc Nguyen Thanh Luan Arshad Khan Gul Rooh D.W. Jeong J. Kaewkhao H.J. Kim S. Kothan Department of Physics Kyungpook National University Daegu 41566 Republic of Korea Center for High Energy Physics Kyungpook National University Daegu 41566 Republic of Korea Department of Physics Faculty of Arts and Sciences Najran University Najran Saudi Arabia Advanced Materials and Nano Research Center (AMNRC) Najran University P.O. Box: 1988 Najran 11001 Saudi Arabia Department of Physics Abdul Wali Khan University Mardan 23200 Pakistan 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 Center of Radiation Research and Medical Imaging Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai 50200 Thailand

The cerium-doped Tl 2 LaCl 5 (TLC: Ce 3+ ) scintillator has emerged as a highly promising material for radiation detection applications such as positron emission tomography (PET), owing to its high effective atomic number (Z eff ) density and excellent scintillation properties. In this study, we grew a large-sized TLC crystal with a diameter of approximately 1 inch; however, the resulting crystal exhibited some cracks. Comprehensive characterization reveals stable light outputs and energy resolutions across different crystal sizes with only a negligible variation observed in large size crystals. In addition, faster decay and rise times are observed with higher cerium concentrations, achieving a significant decay time reduction to 31 ns with 20% Ce doping, comparable with commercial scintillators such as LaBr 3 : Ce 3+ . These findings underscore the potential of TLC: Ce 3+ as a scalable and high-performance scintillator, suitable for advanced time-of-flight PET applications, despite the challenge posed by its hygroscopic nature for large-scale manufacturing.

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Corrigendum to “Establishment of an institutional diagnostic reference level for vascular lower extremity computed tomography angiography” [Radiat. Phys. Chem., 217, 111460]

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Radiation Physics and Chemistry 2024年 223卷

作者： Abdelmoneim Sulieman Mohammed Alkhorayef Essam Alkhaybari Rasha Jaafar Abdelrahman Elnour Abdullah Almujally Esameldeen Babikir Mohamed Abuzaid Nouf Abuhadi Hassan Salah David A. Bradley Radiology Sciences Department College of Applied Medical Sciences King Saud Bin Abdulaziz University for Health Sciences P.O. Box 2477 Al-Ahsa 31982 Saudi Arabia Department of Radiological Sciences College of Applied Medical Sciences King Saud University P.O Box 10219 Riyadh 11433 Saudi Arabia Prince Sattam Bin Abdulaziz University College of Applied Medical Sciences Radiology and Medical Imaging Department P.O.Box 422 Alkharj 11942 Saudi Arabia Basic Science Department College of Medical Radiologic Sciences Sudan University of Science and Technology Khartoum Sudan College of Radiology and Nuclear Medicine National Ribat University Khartoum Sudan Biomedical Physics Department King Faisal Specialist Hospital and Research Center Riyadh Saudi Arabia Radiologic Technology Program College of Health and Sport Sciences University of Bahrain P.O. Box 32038 Manama Bahrain University of Sharjah College of Health Sciences Medical Diagnostic Imaging Department United Arab Emirates Diagnostic Radiology Technology Department College of Applied Medical Sciences Jazan University Jazan Saudi Arabia Inaya Medical College Department of Nuclear Medicine Technology P.O. Box 271 880 Riyadh 11352 Saudi Arabia Applied Physics and Radiation Technologies Group CCDCU Sunway University Malaysia School of Mathematics and Physics University of Surrey Guildford United Kingdom

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Radiation shielding properties of BaO-ZnO-B2O3 glass for X-ray room 3rd

Radiation shielding properties of BaO-ZnO-B2O3 glass for X-r...

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3rd International Conference on Traditional and Advanced Ceramics, ICTA 2017

作者： Sarachai, S. Chanthima, N. Sangwaranatee, N.W. Kothan, S. Kaewjaeng, S. Tungjai, M. Djamal, M. Kaewkhao, J. Physics Program Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand Informatics Mathematics Faculty of Science and Technology Suan Sunandha Rajabhat University Bangkok10300 Thailand Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai50200 Thailand Department of Physics Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung 40132 Indonesia

ISBN: (纸本)9783035712605

This study is to find a parameters that necessary for fabricating a radiation shielding glass in x-ray room. In this study, we performed a comparison of commercial lead glass product commercial window, and developed lead-free glass in the composition of xBaO:20ZnO:(80-x)B2O3 which are applied used for lead glass replacement. The result found that, the linear attenuation coefficients () were increased with the increase of BaO concentrations and the decrease of an x-ray tube voltage. The developed glass samples were investigated in terms of half value layer (HVL) and mean free path (MFP) that found to be decreased with the increase of BaO concentrations which the good characteristics for application in a x-ray shielding glass manufacturing. © 2018 Trans Tech Publications, Switzerland.

关键词： Barium compounds

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XANES and luminescence studies of M2O3-CaO-SiO2-B2O3 (M2O3 = Y2O3 and La2O3) glasses doped with Dy3+ ions 9th

XANES and luminescence studies of M2O3-CaO-SiO2-B2O3 (M2O3 =...

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9th International Conference on Material and Manufacturing technology, ICMMT 2018

作者： Kaewjaeng, Siriprapa Kaewkhao, Jakrapong Chanthima, Natthakridta Ruangtawep, Yotsakit Klysubun, Wantana Kothan, Suchart Kim, Hong Joo Department of Radiologic Technology Faculty of Associated Medical Sciences Chiang Mai University Chiang Mai50200 Thailand Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand Physics Program Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom73000 Thailand Synchrotron Light Research Institute Muang District 111 University Avenue Nakhon Ratchasima30000 Thailand Department of Physics Kyungpook National University Daegu702-701 Korea Republic of

ISBN: (纸本)9783035713558

The Dy3+-doped glasses of the M2O3: CaO: SiO2:B2O3 (M2O3 = Y2O3 and La2O3) materials have been successfully fabricated with the 0.5 % mol of the Dy2O3 concentration, and thoroughly investigated based on the physical, optical, photo- and radioluminescence properties. The developed glass materials were prepared from the compositions of 25M2O3: 10CaO: 10SiO2: (55-x)B2O3: 0.5Dy2O3 by the conventional melt-quenching technique at 1, 400°C. The clear sample of the doped La2O3 glass demonstrated higher density and the molar volume than those of the doped Y2O3 glass. From the spectrophotometry, the absorption peaks of the Dy3+ ions were clearly observed in both glasses. The photoluminescence (PL) spectra of the developed glasses indicated two-colors with two strongest peaks at 577 nm (4F9/2→6H13/2) and 482 nm (4F9/2→6H15/2). In addition, the emission spectra from the radioluminescence (RL) were identical to those from the PL measurements. From the results of the PL and RL measurements, the Y2O3 glass had higher emission in the intensity than the La2O3 glass. The X-ray absorption near edge spectroscopy (XANES) with the synchrotron radiation was carried out in fluorescent-yield mode to determine the average oxidation number of the Dy ions dispersed in the glass matrices. The Dy L3-edge XANES spectra of both developed glasses were nearly identical with the sharp white line at 7795.5 eV and the edge energy of 7793 eV. Compared to the XANES spectrum of the pure Dy2O3 standard, both glasses showed the difference smaller than 0.5 eV, and therefore confirmed the oxidation number of the Dy ions of 3+. © 2018 Trans Tech Publications, Switzerland.

关键词： Glass

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