Article
Chemistry, Physical
Iskender Akkurt, Ali Alomari, Meltem Y. Imamoglu, Ismail Ekmekci
Summary: This research focuses on oxyfluoride glasses, which have been the main interest for many researchers for over a decade. The importance of glasses in various applications, especially in radiation shielding for human health, is the reason for this interest. The study investigates the gamma ray shielding characteristics of glasses with the formulation (20-x)CaF2-xAl2O3-20Bi2O3-59B2O3-CuO (x = 3,6,9,12,15) by obtaining linear attenuation coefficients (LAC), effective atomic number (Zeff), and effective electron density (Neff) using Phy-X/PSD code.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Optics
Hiroto Yamaguchi, Masanori Koshimizu, Hiroki Kawamoto, Yutaka Fujimoto, Genichiro Wakabayashi, Keisuke Asai
Summary: We developed Tb3+-doped B2O3-Na2O-CaO-P2O5 glasses enriched with 10B or 11B to create new thermoluminescent (TL) glass materials for neutron detection. The TL properties of the glasses were investigated after X-ray and thermal neutron irradiation. The 10B- and 11B-enriched glasses exhibited similar sensitivities to X-rays, while the 10B-enriched glass had higher TL intensities than the 11B-enriched glass in the neutron fluence range of 1.0 x 105-1.0 x 1011 neutron cm-2, indicating efficient thermoluminescence induced by γ-rays and high-energy particles in the 10B(n, α)7Li reaction. The TL intensity derived from the 10B(n, α)7Li reaction increased linearly with the thermal neutron fluence. With a wider dynamic range and lower minimum detectable neutron fluence, the 10B- and 11B-enriched glasses are promising TL materials for neutron detection.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Physical
Mohammed J. R. Aldhuhaibat, Maitham S. Amana, Najwa J. Jubier, A. A. Salim
Summary: The research evaluated the performance of different materials in absorbing gamma rays, and found that epoxy nanocomposites are effective in shielding gamma radiation.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Tianyu Liu, Guobin Hong, Wenli Cai
Summary: This research compared various formalisms of Effective Atomic Number (Zeff), revealing their connections and application in material differentiation on dual-energy computed tomography (DECT). Results showed differences in Zeff values between Bourque and Taylor, and a categorization of formalisms at 61 keV into two groups with similar Zeff values within each group.
Article
Materials Science, Ceramics
Nimitha S. Prabhu, K. Sharmila, N. Karunakara, M. Sayyed, Aljawhara H. Almuqrin, Sudha D. Kamath
Summary: This study examined the effects of doping Er3+ and Yb3+ ions on the thermoluminescence dosimetry performance of the BaO-ZnO-LiF-B2O3-Sm2O3 glass system for the first time. While these ions had a negative impact on the TL intensity, sensitivity, and trap density of the Sm3+ doped glass, they effectively countered the anomalous signal loss after a week and improved the stability. This suggests that rare-earth ion doping can be used to tune the TL dosimetry performance of a glass system.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Multidisciplinary Sciences
S. B. Kolavekar, G. B. Hiremath, Prashant N. Patil, N. M. Badiger, N. H. Ayachit
Summary: This study determined and analyzed the gamma ray shielding parameters of a glass system, and found that the addition of Sm2O3 did not affect the mass attenuation coefficient but had an impact on Compton scattering in the medium energy region. Furthermore, photo absorption and pair creation processes were found to be important in the low and high energy regions, respectively.
Article
Radiology, Nuclear Medicine & Medical Imaging
Li Chen, Xu Ji, Zhe Wang, Yang Chen
Summary: This study performed an error analysis of the material-decomposition-based Z(eff) quantification method and proposed a coefficient calibration-in-groups method to improve the modeling accuracy and reduce the Z(eff) quantification error. The proposed method, which calibrated the coefficients in different groups, showed the lowest average errors compared with the standard method using a single empirical m value. These findings reveal the importance of accurate coefficient calibration for improved Z(eff) quantification.
Article
Nuclear Science & Technology
Said M. Kassem, G. S. M. Ahmed, A. M. Rashad, S. M. Salem, S. Ebraheem, A. G. Mostafa
Summary: The study focused on the influence of lead cations on natural quartz glass shielding material, finding that increasing the concentration of PbO can enhance the shielding behavior towards gamma ray radiation in the glass samples.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Nimitha S. Prabhu, K. Sharmila, Swaroop Kumaraswamy, H. M. Somashekarappa, M. I. Sayyed, Hanan Al-Ghamdi, Aljawhara H. Almuqrin, Sudha D. Kamath
Summary: The addition of Sm2O3 to the glass significantly enhanced TL intensity, and the parameters for defect and TL feature examination were optimized. The irradiated glass showed a good linear TL response, high sensitivity, and reusability.
Article
Materials Science, Multidisciplinary
Nimitha S. Prabhu, K. Sharmila, H. M. Somashekarappa, Hanan Al-Ghamdi, Aljawhara H. Almuqrin, M. Sayyed, Sudha D. Kamath
Summary: The study reported the enhancement of Thermoluminescence (TL) properties in a novel Yb3+ doped glass host by Sm3+ co-doping. The results showed that co-doping significantly improved TL counts, stability, and sensitivity, indicating potential applications in various fields.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Demet Yilmaz, Ali Gurol
Summary: In this study, samples with different effective atomic numbers were prepared by mixing powders through matrix dilution method. The variation of intensity ratios with effective atomic number was investigated, and reliable calibration curves for overlapping peak analyzes were obtained in EDXRF. The results show that the investigated intensity ratios can be used for qualitative analysis of composite materials.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Optics
Nimitha S. Prabhu, H. M. Somashekarappa, M. Sayyed, Abdullah M. S. Alhuthali, Y. Al-Hadeethi, Sudha D. Kamath
Summary: The influence of gamma radiation doses on the 10BaO-20ZnO-20LiF-49.3B(2)O(3) -0.7Er(2)O(3) glass was analyzed in terms of density, optical absorption, and luminescence characteristics. The high doses of radiation resulted in the formation of defects in the glass, altering its optical properties. The study also demonstrated the remarkable radiation hardness of the glass as a green emission device and laser.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Analytical
Nimitha S. Prabhu, K. Sharmila, N. Karunakara, Nouf Almousa, M. Sayyed, Sudha D. Kamath
Summary: In this study, the effect of Er3+ ion co-doping on the TL characteristics of the BaO-ZnO-LiF-B2O3-Yb2O3 glass system was examined. It was found that co-doping enabled the glass system to function as an activator-quencher system, improving the TL intensity and solving the issue of anomalous fading.
Review
Physics, Multidisciplinary
G. Efenji, Iskandar Shahrim Mustafa, F. A. Kamgba, O. O. Ogunleye, Thair Hussein Khazaalah, Nabasu Seth Ezra, Hayder Salah Naeem, Hanisha Mohd Shariff, Munirah Jamil, Muhammad Fadhirul Izwan Abdul Malik
Summary: This research investigates the dosimetric features of borate glasses and lithium glass systems, while also aiming to describe the composition of amorphous materials. It expands our understanding of the structure and behavior of borate glasses. Although silicate and borosilicate glasses meet most scientific and industrial needs, there are certain advantages to borate glasses that have not been widely explored or understood.
Article
Materials Science, Ceramics
Wanli Li, Yifan Sun, Zhaoyang Chen, Pengjun Zhao, Junhua Wang, Yan Zhao, Yanwei Fan, Chengfa He
Summary: In this study, Sm3+ doped glass-ceramic with crystallized BaZn2(PO4)(2) was prepared and its structural, optical, and stimulated luminescence dosimetry properties were investigated. The results showed that the OSL intensity reached a maximum at a Sm3+ concentration of 0.25 mol%, after which a concentration quenching effect was observed. The material also exhibited thermoluminescence and had a linear radiation dose response range of 0.2-500 Gy.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Instruments & Instrumentation
Taisei Hayashi, Kensei Ichiba, Daisuke Nakauchi, Takumi Kato, Noriaki Kawaguchi, Takayuki Yanagida
Summary: In this study, Cr-doped Mg4Ta2O9 single crystals with different doping levels were synthesized using the floating zone method, and their photoluminescence and scintillation properties were evaluated. The results showed that Cr-doped Mg4Ta2O9 single crystals exhibited broad emission bands in the near-infrared region and showed scintillation characteristics within specific wavelength ranges. Additionally, the samples with different Cr doping levels demonstrated different lower detection limits based on the dose rate response function.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
S. Marouf, A. C. Chami, Y. Boudouma
Summary: This study develops a Monte Carlo simulation approach to describe proton-induced secondary electron emission in solids. Theoretical modeling based on the Mott's elastic scattering cross-section and Lindhard's dielectric function was used to calculate the double differential cross-section (DDCS) of excited electrons and describe electron transport in the medium. The results for aluminum show the angular and energy distributions of backscattered electrons for incident protons with energy below 25 keV at normal incidence, and the total electron emission yield also agrees well with available measurements.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
Weipeng Yan, Baojun Duan, Zijian Zhu, Yan Song, Guzhou Song, Jiming Ma, Binkang Li, Yucheng Liu
Summary: This article reports on the scintillation performance of Lithium-doped 2D (PEA)2PbBr4 perovskite single crystals synthesized at room temperature. The crystals exhibit fast decay time, high light yield, and high spatial resolution, making them highly promising for medical diagnostic applications.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
S. B. Vishwakarma, S. K. Dubey, R. L. Dubey, I. Sulania, D. Kanjilal
Summary: Investigations have been conducted on the implanted SiO2 thin film after thermal annealing using various analytical techniques. The results revealed the absence of vacancy defects, variations in vibrational modes and the formation of new structures. The photoluminescence intensity of the annealed SiO2 samples was higher, with a decrease in non-radiative defect centers and an increase in radiative Si:SiO2 interface states. Additionally, the presence of silicon nanoclusters formed after annealing resulted in an additional radiative recombination peak. Furthermore, the formation of new SiOx structures was observed after thermal annealing.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
M. Koshimizu, S. Kurashima, A. Kimura, M. Taguchi
Summary: By observing the scintillation time profiles of CeF3 under irradiations of pulsed beams with different LETs, we found that the initial decay was faster for higher LET, which is consistent with previous studies on other self-activated scintillators. This faster decay at higher LET can be explained by the competition between the scintillation caused by 5d-4f transition of Ce3+ ions and quenching due to the interaction between excited Ce3+ ions close to each other.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
Junjie Shi, Jianhong Hao, Fang Zhang, Qiang Zhao, Bixi Xue, Jieqing Fan, Zhiwei Dong
Summary: This study examined the neutralization process and beam quality of a hydrogen beam by emitting negative hydrogen ions to a hydrogen target. The findings showed that the neutralization efficiency was influenced by variables such as the transport distance, energy, and target gas density. However, the maximal neutralization efficiency was not affected by the density of the target gas or the energy of the negative hydrogen ions.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
