Article
Chemistry, Physical
Duygu Sen Baykal, G. Kilic, Erkan Ilik, E. Kavaz, Ghada ALMisned, R. B. Cakirli, H. O. Tekin
Summary: We designed and synthesized a lead-free and high-density borosilicate glass sample, BSBaZn, with potential applications in medical and industrial radiation facilities. The glass sample showed promising structural, optical, and gamma-ray attenuation properties, as well as high transparency and density, making it suitable for protection purposes in radiation facilities.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
M. H. A. Mhareb, Muna Alqahtani, Y. S. M. Alajerami, Fatimh Alshahri, M. Sayyed, K. A. Mahmoud, Noha Saleh, N. Alonizan, M. S. Al-Buriahi, Kawa M. Kaky
Summary: The shielding features of 10TiO2-10SiO2-(80-x)B2O3-xBaO were studied, with the addition of barium oxide enhancing the performance of various shielding parameters while reducing the effectiveness removal cross-section of fast neutrons, mass stopping power, and projected range variation.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
V. Chatzikos, K. Mergia, G. Bonny, D. Terentyev, D. Papadakis, G. E. Pavlou, S. Messoloras
Summary: In this study, the evolution of open volume defects in neutron irradiated tungsten materials was investigated using positron annihilation spectroscopy. The results showed that neutron irradiation resulted in the formation of dislocations and voids in all tungsten grades, and the density of dislocations and voids decreased with increasing irradiation temperature, while the void size increased.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Astronomy & Astrophysics
Weikang Lin, Tsutomu T. Yanagida
Summary: This study investigates the possibility of the B - L gauge boson as a fraction of dark matter and its implications in explaining the Galactic 511 keV emission, cosmological viability, and consistency with the seesaw mechanism. The results suggest the importance of this model in understanding various phenomena related to B - L symmetry breaking.
Article
Materials Science, Ceramics
Nurullah Copoglu, Hatice Gokdemir, Tamer Cengiz, Bugra Cicek
Summary: The purpose of this study is to investigate the recycling or reuse of rice husk ash (RHA) in the production of silicate-based glass coatings for metal surfaces. By heat-treating RHA particles and analyzing their chemical composition, the study identifies the segment with the highest SiO2 ratio for further evaluation. The findings show that calcination procedure is necessary to maintain the technical characteristics of amorphous coatings, and RHA can be used as a substitute for silica in borosilicate glass coatings.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Mohammad Khoeini, Alireza Kolahi, Saeed Hesaraki
Summary: This study investigates the effect of replacing CaO with BaO on mechanical properties, bioactivity, and cell adhesion of SiO2-B2O3-Al2O3-P2O5-CaO-Na2O-based glass. The results show that the hardness of the glass increases with the replacement of barium oxide, while the fracture toughness remains the same. The BaO-incorporated glass exhibits reduced in vitro bioactivity compared to the base glass, but still maintains cell propagation and proliferation.
CERAMICS INTERNATIONAL
(2022)
Article
Computer Science, Interdisciplinary Applications
Jerzy Dryzek
Summary: The Green's function method was used to solve the one-dimensional positron diffusion equation for a system with defects of different trapping rates, up to four layers. Analytical relationships were obtained for evaluating data from variable energy positron measurements, implemented in user-friendly free computer code. Fitting strategies were presented for extracting relevant physical parameters, with the code used to determine positron diffusion length in various samples.
COMPUTER PHYSICS COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Vladimir Slugen, Jarmila Degmova, Stanislav Sojak, Martin Petriska, Pavol Noga, Vladimir Krsjak
Summary: New materials for advanced fission/fusion nuclear facilities must demonstrate resistance to radiation embrittlement, which can be studied using ion bombardment experiments. While these experiments may complicate post-irradiation examination, slow-positron beam spectroscopy is an effective method to investigate the microstructural defects induced by ion implantation. The pulsed low-energy positron system (PLEPS) in Munich offers one of the best slow-positron beam facilities for such studies.
Article
Materials Science, Ceramics
P. Nandi, D. Dutta, B. Sanyal, Richa Mishra, M. Goswami, A. K. Arya
Summary: Lead silicate glasses were prepared and optimized for radiation shielding applications. The glasses showed good shielding properties and retained their transparency after exposure to gamma radiation. Addition of Ceria decreased radiation induced absorption and annealing at 300 degrees C helped to recover transparency. Raman spectra analysis provided structural information and showed changes in the glass composition after irradiation.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
O. Shpotyuk, A. Ingram, Y. Shpotyuk, V. Adamiv
Summary: This study investigates the vitrification and devitrification transitions in network oxide compounds using a revised positron annihilation lifetime analysis. It finds that volume-expanded vitrification and volume-contracted devitrification processes occur in SiO2-based network systems, while polymorphous transformations are unfavorable in B2O3-based systems. However, these transitions become possible in modified borates like lithium tetraborate Li2B4O7.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
Sizhe Zhao, Hongyi Chen, Yang Li, Shuoxue Jin, Yanxue Wu, Chuanjiao Zhou, Xiongyao Li, Hong Tang, Wen Yu, Zhipeng Xia
Summary: Irradiation structural damage in lunar soil grains caused by solar wind and solar flare energetic particles has been studied. Cordierite and gabbro were used as analogs for proton irradiation experiments, and the damage was detected using positron annihilation technology, Doppler broadening measurement, focused ion beam, and transmission electron microscopy. Hydrogen diffusion and vacancy sites formation were observed in the irradiated samples.
Article
Materials Science, Multidisciplinary
Ramandeep Kaur, R. B. Rakesh, Sachin G. Mhatre, Vijeta Bhatia, Dinesh Kumar, Harpreet Singh, Supreet Pal Singh, Ashok Kumar
Summary: Trivalent neodymium ion activated glasses were synthesized and studied for their structural, physical, optical, and thermoluminescence properties. One sample was identified as a potential candidate for radiation dosimetry based on its linear dose response curve.
Article
Nanoscience & Nanotechnology
Zhiyuan Chen, Yujie Yang, Fang Yao, Yongfu Yang, Yuwei Li, Xuchao Jia, Junqi Dong, Libing Qian, Wanping Chen, Wusheng Zou, Jiangbin Zhao, Jinbiao Pang, Wen Xu, Zhu Wang, Gaokui He, Qianqian Lin
Summary: X-ray detectors based on conventional semiconductors with large atomic numbers have poor stability under high dose rate of ionizing irradiation. However, this study demonstrates that a wide band gap ceramic-boron nitride with small atomic numbers can be used for sensitive X-ray detection. Boron nitride samples showed excellent resistance to ionizing radiation and maintained good charge transport properties even after large dose of neutron irradiation. The fabricated X-ray detectors showed decent performance and the neutron-aged boron nitride showed improved operational stability under continuous X-ray irradiation, suggesting great potential for real applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nuclear Science & Technology
Qiang Yan, Xiangyin Meng, Daming Liu, Qian Zhang, Jie Zhu
Summary: The paper evaluates the displacement damage induced by positrons and its effect on defects measurement, highlighting that displacement damage can only be produced when the positron's kinetic energy exceeds a certain threshold. It compares the displacement cross section for fast positrons with that for electrons, and develops a Monte Carlo tool to simulate the distribution of defects and terminating position of positrons.
NUCLEAR MATERIALS AND ENERGY
(2021)
Article
Materials Science, Multidisciplinary
A. M. A. Mostafa, B. O. Elbashir, Shams A. M. Issa, M. A. M. Uosif, Antoaneta Ene, Merfat Algethami, Omemh Bawazeer, E. F. El Agammy, Hesham M. H. Zakaly
Summary: The study tested barium boro-silicate glass-ceramics with different additives for gamma radiation using FLUKA Monte Carlo code, finding that BBSDY sample with 5 mol% Dy-III-Oxide was most effective for radiation shielding, and increasing additive concentrations significantly impacted shielding parameters.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Inorganic & Nuclear
Arunasis Bhattacharyya, Seraj A. Ansari, Trilochan Gadly, Sunil K. Ghosh, Manoj Mohapatra, P. K. Mohapatra
DALTON TRANSACTIONS
(2015)
Article
Chemistry, Inorganic & Nuclear
Suman Mallick, Mrinal Kanti Ghosh, Manoj Mohapatra, Sudip Mohapatra, Swarup Chattopadhyay
INORGANICA CHIMICA ACTA
(2015)
Article
Optics
R. M. Kadam, B. Rajeswari, M. Mohapatra, N. K. Porwal, N. S. Hon, T. K. Seshagiri, V. Natarajan
JOURNAL OF LUMINESCENCE
(2015)
Article
Chemistry, Physical
M. Mohapatra, B. Rajeswari, R. M. Kadam, M. Kumar, T. K. Seshagiri, N. K. Porwal, S. V. Godbole, V. Natarajan
JOURNAL OF ALLOYS AND COMPOUNDS
(2014)
Article
Optics
M. Mohapatra, V. Natarajan, B. Rajeswari, A. R. Dhobale, S. V. Godbole
JOURNAL OF LUMINESCENCE
(2014)
Article
Optics
Mithlesh Kumar, M. Mohapatra, V. Natarajan
JOURNAL OF LUMINESCENCE
(2014)
Article
Materials Science, Ceramics
M. Mohapatra, V. Natarajan, S. V. Godbole
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2014)
Article
Chemistry, Analytical
M. Mohapatra, V. Natarajan
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2014)
Article
Materials Science, Multidisciplinary
Mithlesh Kumar, M. Mohapatra, V. Natarajan
MATERIALS RESEARCH BULLETIN
(2014)
Article
Chemistry, Analytical
Pragya Pandit, Shailendra Kumar, Manoj Mohapatra, Pargin Bangotra, Rohit Mehra, A. K. Singh
Article
Chemistry, Physical
D. Shalini, P. Vinothkumar, K. Sathyamoorthy, P. Muralimanohar, Tejaswi Ashok Hegde, G. Vinitha, Manoj Mohapatra, Priya Murugasen
Summary: A 3NAP cocrystal was synthesized using slow solvent evaporation technique, exhibiting superior crystallinity and nonlinear optical properties. The crystal showed positive photoconductivity and potential applications in nonlinear optical devices.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Engineering, Environmental
Santosh Kumar Gupta, Brindaban Modak, Malini Abraham, Subrata Das, Ruma Gupta, K. G. Girija, Manoj Mohapatra, Kathi Sudarshan
Summary: This study presents a rare-earth free phosphor material for electric lighting, achieving high photoluminescence quantum yield and high-quality white light emission by manipulating defect density. The findings provide a promising solution to the issues of expensive rare earth doping and complex organic synthesis.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Pratik Das, Bal Govind Vats, Manoj Mohapatra, Abhishek Kumar Rai, Pradeep Samui, Muhammed Shafeeq, S. C. Parida
Summary: In this study, a series of solid solutions with compositions of Ca10-xSrx(PO4)6F2 (x = 2, 4, 6, and 8) were synthesized and their structural properties were analyzed by XRD, FTIR, and Raman spectroscopy. The results showed that the average strain values in the calcium-rich compositions were higher than those in the strontium-rich compositions. Thermo-physical properties such as heat capacity and thermal expansion were experimentally measured. Electron beam irradiation studies demonstrated the resistance of the substituted solutions to phase degradation. Combined FTIR, Raman, and EPR studies revealed the detrimental effect of higher strontium content on fluorapatite through surface modification. This study provides insights into the design of better matrices for 90Sr loading capacity and stability.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Reshmi Thekke Parayil, Santosh K. Gupta, Brindaban Modak, G. D. Patra, N. S. Rawat, M. Mohapatra
Summary: In this study, the researchers focused on improving the efficiency of white light emitting diodes (LEDs) by designing efficient red emitting luminophores. By utilizing the favorable properties of Y2Zr2O7 (YZO) pyrochlore and Eu3+ as a dopant ion, they were able to achieve a significant increase in the photoluminescence quantum yield (PLQY) of the LEDs.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
Reshmi Thekke Parayil, Santosh K. Gupta, Rohan Rohilla, Jyoti Prakash, Kathi Sudarshan, Manoj Mohapatra
Summary: Defect engineering is an efficient strategy to introduce different functionalities in materials, and this study synthesized Y2Zr2O7 by the gel combustion method and engineered defects through annealing. The resulting material exhibited dual-band bluish-green emission, with the color tunable from blue to green in the nano to bulk range. The bulk samples showed higher photoluminescence quantum yield and reduced surface defects compared to the nano samples. The materials also demonstrated potential as gas sensors for detecting VOCs, with excellent sensitivity and response and recovery time towards benzene.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
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)
