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A pilot study of diabetes effects on radiation attenuation characteristics of tibia and femur of rats Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-15 Yasin Gökçe, Ferdi Akman, Özge Kılıçoğlu, Yiğit Ali Üncü, Hasan Özdoğan
This study aimed to investigate the effect of diabetes on radiation attenuation parameters of the femur and tibia of rats using Monte Carlo Simulations. First, control and diabetic rats were identified and tibias and femurs were removed. Then, the elemental ratios of the bones obtained were calculated using EDS (Energy Dissipative X-ray Spectroscopy). Therefore, radiation permeability properties of
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Half-life determination of 215At and 221Ra with high-purity radioactive ion beams Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-13 S. Bara, E. Jajčišinová, T.E. Cocolios, B. Andel, S. Antalic, A. Camaiani, C. Costache, K. Dockx, G.J. Farooq-Smith, A. Kellerbauer, R. Lica, K.M. Lynch, P. Marini, M. Piersa-Siłkowska, S.T. Stegemann, M. Stryjczyk, D. Treasa, P. Van Duppen
At CERN-ISOLDE, high-purity radioactive ion beams of Fr and RaF were investigated with -decay spectroscopy at the CRIS and ASET experiments in the course of three different experimental campaigns. The half-life of At, -decay daughter of Fr, is measured to be 36.3(3)[9], and that of Ra was determined to be 26.2(1)[6]s, both of which are well in line with the trends in this region of the nuclear landscape
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Comparative study of the impact of interpad nominal length on the onset of the charge multiplication in standard segmented LGAD with 2 p-stops and bias ring as isolated structures Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-12 Gordana Laštovička-Medin, Jovana Doknic, Ivona Bozovic, Gregor Kramberger, Tomáš Laštovička, Jakob Andreasson, Mateusz Rebarz
We present an investigation of the interpad region (IP) in the Ultra-Fast Silicon Detector (UFSD) Type 10, utilizing a femtosecond laser and the transient current technique (TCT). We elucidate the isolation structure and measure the IP distance between pads, comparing it to the nominal value provided by the vendor. A comparison of sensors with identical layouts but different nominal IP distances (49
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Yield estimation of radionuclides from 6,7Li-induced reactions: A comparative analysis for 97,95Ru Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-12 Ankur Singh, Moumita Maiti
The article reports the production yields of the medically relevant Ru radionuclides and other co-produced radionuclides from Li-induced reactions on Nb target within the 20–45 MeV energy range. The residues were measured employing the activation technique followed by the offline -spectroscopy. Statistical model calculations using EMPIRE3.2.2 code are employed to assess the optimized nuclear model
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Estimating the initial absorbed dose of radiation in dried figs using EPR spectroscopy Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-12 Katerina I. Aleksieva, Yordanka G. Karakirova, Krasimir G. Dimov
Dried figs were studied by Electron Paramagnetic Resonance (EPR) spectroscopy for identification of radiation treatment and dosage assessment. Gamma-irradiated samples show a multicomponent "sugar-like" EPR spectrum with line width of 6–8 mT, centered at g = 2.004. The investigation of the influence of the instrumental parameters microwave power and modulation amplitude on the EPR signal show saturation
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Characterization and mapping of the neutron fields around Bruce Power’s 177Lu isotope production system Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-11 Andrei R. Hanu, Jovica Atanackovic, Craige Boyd, Eric M. Johnston, Anthony J. Waker
Bruce Power operates a first-of-its-kind isotope production system (IPS) that enables continuous production of Lu within Canada Deuterium Uranium (CANDU) commercial power reactors. Located on the reactivity mechanisms deck of Unit 7, just outside of reactor containment but in close proximity to the primary heat transport (PHT) pumps, this facility offers unique advantages for Lu production. However
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Application of high-sensitivity radon monitor on walk-in type radon calibration chamber at KRISS Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-11 Hyun Su Lee, Sanghoon Hwang, Minji Han, Byoung-Chul Kim, Jong-Man Lee, Kyoung Beom Lee
This paper introduces the KRISS-Rn4, a high-sensitivity radon monitor with four detection cells, installed within a walk-in type radon calibration chamber at KRISS. The KRISS-Rn4 exhibits enhanced energy resolution through channel-by-channel signal processing and data acquisition. Results reveal that it achieves lower statistical fluctuations and faster response times in monitoring test atmospheres
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Trends of occupational exposure to ionizing radiation in Central China for the period 2000–2021 Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-11 Mengxue Li, Lei Deng, Wenshan Zhou, Yanfang Zhao, Tuo Wang, Shuxia Hao, Shengnan Fan, Jun Deng, Quanfu Sun
A retrospective analysis of occupational exposure to ionizing radiation from medical uses and industrial uses in the three provinces of Central China from 2000 to 2021 was conducted. The average annual effective dose in medical uses and industrial uses decreased from 2.042 mSv and 2.334 mSv in 2000–2002 to 0.476 mSv and 0.371 mSv in 2021 respectively; the fraction of monitored workers receiving annual
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Preliminary performance study of synthetic alumina nanoparticles for retention of cobalt and cesium cations Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-07 O.A. Abdel Moamen, G.A. Dakroury, H.S. Hassan
In the present study, a facile nano-sized gamma alumina was synthesized and then examined for immobilization of cobalt and cesium ions individually from aqueous solutions. The comprehensive analysis of functional groups, phase composition, surface morphology and sorption characteristics of the synthesized nano-sized ϒ alumina was executed. It was deduced that acquired material was low-crystalline with
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Production of 117mSn and 119mSn by photonuclear reactions on natural antimony Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-07 M. Krmar, N. Jovančević, Ž. Medić, D. Maletić, Yu Teterev, S. Mitrofanov, K.D. Timoshenko, S.I. Alexeev, H. Marukyan, I. Kerobyan, R. Avetisyan, R. Dallakyan, A. Hakobyan, L. Vahradyan, H. Mkrtchyan, A. Petrosyan, H. Torosyan
Natural antimony targets were irradiated in a 60 MeV bremsstrahlung beam and gamma spectrometric measurements were performed. The goal was to establish the yield of Sn, a radionuclide with great potential for application in medicine. Considering that Sn is predominantly produced through a photonuclear reaction in which an charged particle is emitted (Sb(γ,p3n)), the yield of this tin isotope is much
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Induction of genetic variability of maize genotypes through radiation revealed mutants resistant to maize streak disease Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-06 Yayra Afram, Godwin Amenorpe, Elvis Asare Bediako, Alfred A. Darkwa, Siphiwokuhle Funani Shandu, Maryke T. Labuschagne, Isaac Kodzo Amegbor
The absence of genetic variability among crop genotypes is an impediment to breeding progress, hence mutagenesis could serve as a useful tool to create genetic variation to obtain desirable traits of interest. In this study, four maize genotypes, Obatampa, Dapango, Pann 54 and Honampa which were susceptible to maize streak disease (MSD) were acutely irradiated at 254.3 Gy, using a cobalt 60 (Co) at
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On the significance of the measurement evaluation method in decision making: A synthesis of JCGM 101 and JCGM 106 applied to gross alpha and gross beta measurements using LSC Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-06 H. Ramebäck, A. Tovedal, K. Norlin
In decision making, conformity to a specification like a reference value or a requirement, the decision rule applied shall be documented. Furthermore, if the measurement uncertainty is considered in the decision process the associated probability, or risk, that a measurement result is above (or below) a reference value shall be taken into account. In this work it is shown that for gross alpha and gross
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Excitation functions for fast neutron induced reactions on iron and lead Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-05 B. Liu, G. Tian, R. Han, F. Shi, H. Sun, Z. Chen, Z. Zhang, Q. Li, P. Luo
Cross sections of the Fe(n,p)Mn, Fe(n,)Cr, Fe(n,p)Mn and Pb (n,2n)Pb reactions induced by D–T neutrons were obtained with activation method and -ray spectrometry technique. Experimental values measured in this work are consistent with most of the previous literature data. These reactions cross sections were theoretically calculated by using the TALYS-1.96 and EMPIRE-3.2.3 codes from threshold up to
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Automated radiosynthesis of [18F]DPA-714 on a commercially available IBA Synthera® Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-05 Amy L. Vāvere, Arijit Ghosh, Victor Amador Diaz, Allison J. Clay, Peter M. Hall, Kiel D. Neumann
The goal of this work was to develop a reliable method to produce the well-validated microglial activation PET tracer, [F]DPA-714, routinely for clinical and preclinical research using an IBA Synthera®. Optimization of literature methods included reduced precursor mass and use of TBA HCO as the phase transfer agent in place of Kryptofix® 222 in a 65-min synthesis with an average activity yield of 24
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Assessment of radiological hazards from radioactivity natural of cement used in Dwellings in Rio de Janeiro, Brazil Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-03 Leandro Barbosa da Silva, Lucas Faria da Silva, Vanderlei Bruno Junior, Carlos Omar Pastrana Orejuela, Paulo Roberto Rocha Ferreira, Ademir Xavier da Silva
Brazil is the fourth largest cement consumer in the world and the largest producer in Latin America, around 1.3% of global production. The main inputs in the manufacture of cement are limestone and clay. Few studies have been carried out in the country on the risk of these materials used in civil construction. Therefore, the objective of this present work is to evaluate the radiological danger that
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Methodology for measuring photonuclear reaction cross sections with an electron accelerator based on Bayesian analysis Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-02 Saverio Braccini, Pierluigi Casolaro, Gaia Dellepiane, Christian Kottler, Matthias Lüthi, Lorenzo Mercolli, Peter Peier, Paola Scampoli, Andreas Türler
Accurate measurements of photonuclear reaction cross sections are crucial for a number of applications, including radiation shielding design, absorbed dose calculations, reactor physics and engineering, nuclear safeguard and inspection, astrophysics, and nuclear medicine. Primarily motivated by the study of the production of selected radionuclides with high-energy photon beams (mainly Ac, Sc, and Cu)
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Simulation of defect detection for the buried petroleum pipe by the X-ray backscatter imaging Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-02 Hui Li, Liang He, Hua Li, Deyuan Li
Ensuring the integrity, safety, and compliance of oil pipelines is crucial for operators. Two significant factors affecting pipeline integrity are metal loss due to corrosion or air gouging and the presence of cracks. This paper introduces an X-ray backscatter nondestructive testing model on a smart pig(an intelligent robot) for internal inspection of petroleum pipelines. The paper investigates the
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A method of determining the bremsstrahlung flux-weighted average photonuclear cross section Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-01 V.L. Uvarov, A.A. Zakharchenko, N.P. Dikiy, Yu V. Lyashko, R.I. Pomatsalyuk
Based on a developed analytical model, a method is proposed for measuring the photonuclear cross section averaged over bremsstrahlung flux without application of additional target-monitor of photon flux. The method involves the use of a thin isotopic target, that completely overlaps the photon beam (a photonuclear converter), as well as an algorithm for processing the data on the yield of a reaction
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On the gamma radiation response of commercially available 3D printing materials for medical dosimetry Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-03-01 A. Alfuraih, O. Kadri, F. Fakhouri
3D printing technology has rapidly spread for decades, allowing the fabrication of medical implants and human phantoms and revolutionizing healthcare. The objective of this study is to evaluate some radiological properties of commercially available 3D printing materials as potential tissue mimicking materials. Among fifteen materials, we compared their properties with nine human tissues. In all materials
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The impact of the broad range of gamma doses on follow-up fission fragment track parameters in CR-39 radiation detector Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-28 S.M. Othman, I.A. El-Mesady, A.S. El-badawy, E.H. Ghanim
In this study, the effect of high γ-doses on the track parameters, structure as well as optical properties of pristine and γ-irradiation CR-39 nuclear track detector (NTD) were investigated. CR-39 detectors were exposed to γ-doses from 50 up to 500 kGy and then irradiated by fission ions (F.F) of fluence from CF source. The track diameter (D), bulk etch rate (V), etch induction time (EIT), cut-off
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Physical, structural and nuclear radiation shielding behavior of Ni–Cu–Zn Fe2O4 ferrite nanoparticles Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-28 Kalidas B. Gaikwad, Ketan P. Gattu, Chaitali V. More, Pravina P. Pawar
In this study, Ni–Cu–Zn FeO ferrite nanoparticles have successfully been synthesized utilizing the Co-precipitation technique. The primary objectives encompassed elucidating phase purity, discerning functional groups, scrutinizing surface morphology, and conducting structural analyses. To accomplish these objectives, a battery of advanced characterization techniques was employed, including power X-ray
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Use of air things radon detector in liquid samples (serum and urine) Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-28 Abdulhussein A. Alkufi, Ali Abid Abojassim, Mohanad H. Oleiwi
This study involved the assessment of Rn concentrations in liquid samples (namely serum and urine) obtained from individuals who were smokers and non-smokers across five distinct age groups in the Najaf Governorate of Iraq. The measurements were conducted using a portable digital Air Things device commonly employed for detecting radon gas in residential environments. This device was placed in a container
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A new empirical formula for calculation of (n,3n) cross sections of heavy mass nuclei in the energy region 22–27.5 MeV Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-28 Mustafa Yiğit, Mehmet Eraslan
In this paper we want to study (n,3n) reactions using an empirical formula derived on the basis of the statistical model considering reaction -value dependence. This formula was obtained by taking into account the exponential dependence on asymmetry parameter for neutron-induced reactions in Levkovskii's empirical formula. In addition, the present formula depends also on incident energy , reaction
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Efficient uptake of 85Sr and 60Co using fabricated inorganic sorbent for reducing radiation doses of simulated low-level waste Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-28 R.M. Maree, N.A. Kotb, M.R. Abass
The present study investigated the sorption behavior of Sr and Co radionuclides from aqueous solutions onto tin molybdate (SnMo) sorbent. SnMo has been synthesized using the precipitation method and was characterized using four analytical techniques including FT-IR, XRD, SEM, and XRF. The sorption studies applied on Sr and Co include the effect of shaking time, pH, concentration, and saturation capacity
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A series of high-sensitivity radon detection systems and their applications in nitrogen as well as the boil-off liquid nitrogen measurement Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-28 Fan Wang, Hao Wang, Zhi Zeng, Jinmin Yang, Kang Peng, Lei Zhang, Qiuju Guo
In modern rare-event search experiments such as neutrino experiments and dark matter search experiments, radon is one of the most important radiation backgrounds since it can emanate from nearly all the materials containing radium and migrate freely in the experiment system. To support the China Dark Matter Experiment (CDEX) at China Jinping Underground Laboratory (CJPL), a series of high-sensitivity
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Modeling of liquid-liquid hollow fiber supported membrane equilibrium including the non-ideality of the aqueous and organic phases in the recovery systems of radionuclides in sulphate-halide/aliquat-336 in O-xylene Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-27 A.T. Kassem, Mahmoud M.S. Ali
Study of modeling of L/LHFSLM equilibrium based on the Non-ideality of the Aqueous and Organic Phases in the Recovery of Eu in HSO-Halides/Aliquat-336 in 20% kerosene as feeding phase at pH 3.78–4.55, by the ratio 89.7%,while separation of Sr and Cs there was a problem between them by using hollow HFSLM only, the reason for that the organic solvents affect the rate of reaction in the Diamino-1,2-c
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Investigation of the OAM EM wave tissue irradiation at millimeter-wave frequencies Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-27 Andjelija Ž. Ilić, Jelena Z. Trajković, Slobodan V. Savić, Milan M. Ilić
Recently, there has been an increase of interest in the use of electromagnetic (EM) waves with helical wavefronts, known as the orbital angular momentum (OAM) waves. Applications in the field of biomedicine have been foreseen, such as medical imaging and diagnosis, deep-tissue imaging, biosensing, and communication with medical implants. Other possible applications include various localized tissue
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Characterization of flux distribution in the pool of the RMC SLOWPOKE-2 Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-27 D.A. Huston, P. Samuleev, F. Kelly, E.C. Corcoran
The neutron flux distribution within the pool of the SLOWPOKE-2 reactor at the RMC has been characterized using neutron activation measurements as well as MCNP simulations. Westcott equivalent thermal neutron flux values were calculated from measured activities of solutions of Co, Au, and Cd-shielded Au at several reactor flux settings and compared to tabulated fluxes from MCNP simulations. Good agreement
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Optimization and automation of the radiosynthesis of [18F]Lu-LuFL as a clinically useful PET ligand targeting FAP for tumor imaging Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-27 Lei Peng, Tianhong Yang, Dake Zhang, Renbo Wu, Fuhua Wen, Jianbo Liu, Xingjin He, Xiangsong Zhang, Zhihao Zha
Recently, a novel radiohybrid tracer [F]Lu-LuFL targeting the fibroblast activation protein (FAP) has been developed for PET imaging of solid tumors. This tracer has shown promising results, prompting us to conduct a first-in-human study to evaluate its efficacy for PET imaging of FAP in human body. In order to facilitate the routine production and clinical application of [F]Lu-LuFL, a straightforward
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Performance evaluation of a 71Ga(n,γ)72Ga reaction-based epithermal neutron flux detector at an AB-BNCT device Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-25 Xingcai Guan, Huangxin Wu, Rui Bai, Guanghua Wu, Wenliang Yang, Wuliang Guo, Haixi Wang, Yongquan Wang, Junliang Du, Lu Zhang, Long Gu
The Ga(n,γ)Ga reaction-based epithermal neutron flux detectors are novel instruments developed to measure the epithermal neutron flux of boron neutron capture therapy (BNCT) treatment beams. In this study, a spherical epithermal neutron flux detector using Ga(n,γ)Ga reaction was prototyped. The performance of the detector was experimentally evaluated at an accelerator-based BNCT (AB-BNCT) device developed
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Radiation-induced modification effects in covalent-network glass formers: Phenomenological description within unified configuration-enthalpy model Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-24 Oleh Shpotyuk, Mykola Vakiv, Andriy Kovalskiy, Roman Golovchak, Valentina Balitska, Mykhaylo Shpotyuk
Externally-induced modification activated by high-energy excitation such as γ-irradiation from Co source is analyzed in chalcogenide glasses in terms of radiation-structural and glass-relaxation metastability, at the example of sulphides (including stoichiometric arsenic trisulphide, AsS) and selenides. Unified evolving conjugated (free energy in dependence on configuration coordinate) and (temperature
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Investigation of NK cell function against two target hematological cell line using radioactive chromium assay Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-24 V, l, a, d, i, m, i, r, , J, u, r, i, š, i, ć
NK (Natural killer) cells are a special population of peripheral blood lymphocytes that kill virus-infected cells as well as tumor cells. For testing NK cell function, the classic gold standard assay has been used for a long time, determining the activity from target tumor cells using radioactive chromium in cell cultures for 4h. In this study two hematological cell lines K562 and MDS where used and
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Evaluation of gamma irradiation effects on antioxidant capacity of propolis Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-24 Ralitsa B. Mladenova, Nikolay Y. Solakov, Kamelia K. Loginovska
The irradiation effects on antioxidant potential and on content of phenolic compounds of propolis ethanoic extracts were studied. It was found out that gamma treatment of samples with 2 and 10 kGy had a weak decreasing effect on the total phenolic content (TPC), while no change was observed in the propolis irradiated with 5 kGy. The antiradical activity of extracts was assessed by the DPPH free radical
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Airborne 210Pb, Si, Zn and Pb as tracers for atmospheric pollution in Helsinki metropolitan area Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-24 Eleftheria Ioannidou, Stefanos Papagiannis, Manousos Ioannis Manousakas, Mika Vestenius, Konstantinos Eleftheriadis, Jussi Paatero, Lambrini Papadopoulou, Alexandra Ioannidou
This study analyzed 16070 daily and 608 weekly air filter samples from the Helsinki metropolitan area collected between 1962 and 2005. The aim was to use the Potential Source Contribution Function (PSCF) to determine potential sources of silicon (Si), zinc (Zn), lead (Pb), and radioactive isotope Pb. The main sources for Si and Pb were industrial activities, particularly mining, metal industry, and
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Evaluation of derived concentration guideline levels reflecting the site-specific data for the soil of the Korea research reactor unit 1 and 2 Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-24 Geun-Ho Kim, Ilgook Kim, Min-Seong Kim, Ji Woo Kim, Kwang Pyo Kim
The purpose of this study is to evaluate the derived concentration guideline levels for unrestricted site reuse the Korea research reactor unit 1 and 2. Distribution coefficients for Co-60 and Sr-90 were derived, and site-specific values of the KRR soil were applied for the DCGLs for the seven target nuclide. The distribution coefficients of Co-60 and Sr-90 were 6,128 and 86.0 mL/g. The DCGLs derived
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Design of simulated-gas calibration source and self-attenuation correction methods for radioactive noble gas measurement with HPGe detector Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-23 Shuo Wang, Fei Tuo, Xiang-ping Qiu, Yang Xiao, Jun-cheng Liang
In this study, to achieve accurate measurement of radioactive noble gas and enhance the precision of efficiency calibration, a relatively low-cost and low-density simulated-gas calibration source (SGCS) was produced from polyurethane foam with a density of = 0.098 g cm. Using SGCS with a Marinelli beaker geometry, the efficiency calibration was applied to a BE5030, 50.5% relative efficiency HPGe detector
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A new evaluation of the decay data for 166Ho Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-23 B.E. Zimmerman
The β-emitter Ho is of interest as a potential radiolabel for therapeutic medical applications. A new decay data evaluation for Ho has been performed using the Decay Data Evaluation Project (DDEP) methodology. New recommended values for the half-life, γ-ray emission probabilities, β branching ratios, and other relevant nuclear and atomic data are provided. This paper provides a summary of the evaluation;
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Emission characteristics of pulse CNT cold cathode X-ray source combined with channel electron multiplier Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-22 Kai Miao, Yunpeng Liu, Sheng Lai, Junqiu Yin, Feixu Xiong, Xiaoyu Dong, Xiaobin Tang
Carbon nanotube (CNT)-based field emission X-ray source with the advantage of fast start-up response offers the chance to achieve high-frequency X-ray emission. In this study, a high-frequency random pulse X-ray source of CNT cold cathode combined with a channel electron multiplier (CEM) was built, and its direct current (DC) and pulse emission characteristics were tested. The DC measurement results
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Study of the effect of implantation temperature on the migration behaviour of Xe implanted into glassy carbon Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-22 M.Y.A. Ismail, Z.A.Y. Abdalla, E.G. Njoroge, T.T. Hlatshwayo, J.B. Malherbe, A.J. Innocent, Huzifa M.A.M. Elnour
The effect of implantation temperature on the migration behaviour of xenon (Xe) implanted into glassy carbon and the effect of annealing on radiation damage retained by ion implantation were investigated. Glassy carbon substrates were implanted with 320 keV Xe to a fluence of 2 × 10 cm. The implantation process was performed at room temperature (RT) and 100 °C Some of the as-implanted samples were
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Assessment of occupational external radiation exposure of workers in the Southwest of Libya using portable NaI detector Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-21 Usama Elghawi, Meftah Elammari
In this study, gamma dose rates generated from the naturally occurring radioactive materials (NORM) were measured in the waste streams of a large scale and sludge onshore petroleum operations. Measurements conducted in this work involved: sludge recovery from separation tanks, sludge forming, NORM storage, scaling in oil tubulars, scaling in gas production and sedimentation in produced water evaporation
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A microfluidic route for synthesis of scandium oxide microspheres, their characterization and neutron activation Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-20 Jayashree Biswal, Nirvik Sen, Annie Joseph, V.K. Sharma, K.K. Singh, K.T. Shenoy, H.J. Pant
Radioactive scandium-46 microspheres have applications in mapping flow in a chemical reactor through a technique known as radioactive particle tracking (RPT). In the present study a novel microfluidic method has been developed for synthesis of controlled size scandium oxide microspheres. An inline/in-situ mixing of the scandium precursor and gelling agents was implemented which makes the microfluidic
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High resolution gamma-ray spectrometry for routine measurements of environmental samples Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-19 G. Eleftheriou, C. Tsabaris, E.G. Androulakaki, F.K. Pappa, D.L. Patiris
A practical and comprehensive experimental approach for radioactivity measurements of voluminous environmental samples using high-resolution gamma-ray spectrometry with High Purity Germanium (HPGe) detector is presented. The radioanalytical procedure includes sample preparation, detector calibration, implemented corrections, quality control and assurance; and it is demonstrated with the determination
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Analyzing neutron emission cross sections for 22.2 MeV proton-induced reactions on 58Ni and 52Cr Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-19 Ayhan Kara, Emil Mammadzada
Double differential cross-section calculations were performed for proton-induced reactions with Ni and Cr isotopes using Monte Carlo code PHITS 3.32 and TALYS 1.96. Comparative analyses with experimental data from the EXFOR library demonstrated the effectiveness of the CTFGM and BSFGM models in conjunction with the TALYS nuclear code program for (p,xn) reactions across all angular values. While the
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Preparation of paper scintillators and their effective use in radiation testing for [formula omitted]- and [formula omitted]- particles in radioactive liquid, solid, and gas contaminants Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-16 Hirokazu Miyoshi, Mami Nakamura
A paper scintillator, which is composed of an organic scintillator encapsulated in silica nanoparticles adsorbed on three types of micrometer-size silica fine powder (scintillator–silica FP), was prepared by a paper making method. The scintillator–silica FP was found to be distributed throughout the paper scintillator, as shown in its emission images. Surface photoluminescence spectra depended on the
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Pathogenic factors of maxillary sinus mucosal thickening observed by cone-beam computed tomography (CBCT) Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-16 Yingying Song, Mingdeng Rong, Yingxin Ye, Hanfei Zhang, Hongxing Chu, Yong Yang, Yarong Wang, Zekun Gan
To explore the pathogenic factors associated with maxillary sinus mucosal thickening with Cone-beam computed Tomography (CBCT). From 2016 through 2020, 93 patients with periapical periodontitis or periodontitis in the maxillary posterior dental region were selected. The preoperative thickness of the periodontitis group was significantly higher than that of the periapical periodontitis group (P < 0
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Investigations on [formula omitted]-Al[formula omitted]O[formula omitted] thermoluminescence for dosimetry of high energy photons Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-15 Antoine Lahaie, Gilles Assaillit, Marc Gaillardin
This article presents a study of high-energy X-ray dosimetry carried out at CEA Gramat. In this study, we are interested in alumina as a new thermoluminescent dosimeter. We performed several pre-irradiation protocols to use alpha-alumina as a dosimeter over doses ranging from 0.09 Gy to 350/400 Gy in order to obtain calibration curve for these different protocols.
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Integrated absolute full energy peak efficiency: A measure of photon registration efficiency Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-13 Slawomir Jednorog, Bartlomiej Klis, Kamil Szewczak
Integrated absolute full energy peak efficiency (IAFEPE) is a measure of photon registration efficiency using the -ray spectrometry method. We have derived appropriate formulas and theoretical explanations of IAFEPE for the first time. IAFEPE is a definite integral (Riemann integral) of the photon registration efficiency function within the detection energy range. IAFEPE, along with associated quantities
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Internal absorbed dose calculation in body organs due to injection of Rhenium-188 labeled to Mu-9 antibody Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-13 S. Hashemi, S.P. Shirmardi, M. Hosntalab, D. Sardari, E. Saniei
The use of radiopharmaceuticals has gained a special place in the diagnosis and treatment of cancers and evaluation of the function of different organs of the body. In this study, the absorbed dose distribution of organs after injection of Re-Mu-9 has been investigated using MIRD method and MCNP-4C simulation code. The Re-Mu-9 labeled was injected the mouse body and the amount of Re-labeled accumulation
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Dual-isotope imaging method for Actinium-225 and Bismuth-213 using alpha imaging detector Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-13 Jong-Guk Kim, Guna Kim, Hyun Su Lee, Byoungsoo Kim, Il-Han Lim, Kwangil Kim, Kyochul Lee
Recently, Ac has received considerable attention for its use in targeted alpha therapy because it has a relatively long half-life and yields four more alpha-particles from the daughter nuclides. The performance evaluation should separately assess the distribution of Ac and Bi because daughter nuclides, including Bi, can cause renal toxicity, which may hinder the widespread use of Ac for targeted alpha
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Comparison between the theoretical and experimental values of transition rate B(E2), deformation parameters and intrinsic quadrupole moments for some Ti isotopes Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-10 Ahmed H. Ali, Naz T. Jarallah, Sergey V. Bedenko, Hanaa A. Alshammar
In this study, electric quadrupole transition properties in some even-even Ti nuclei have been investigated by using different effective charges and interactions. In this respect, B(E2) transition rates, deformation parameters and intrinsic quadrupole moments have been calculated. In calculations, NuShellX code has been used to calculated one body matrix elements (OBDM). Theoretical calculations on
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Relativistic impulse approximation-based compton component of mass energy absorption coefficients (cm2/g) for few materials of medical interest Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-09 V Rao Donepudi, E Gigante Giovanni, Tetsuya Yusa, Tako Akatsuka, Tohoru Takeda, Roberto Cesareo, Antonio Brunetti, Nick Schiavon
Total, whole-atom, individual and integrated Compton scattering cross sections and Compton energy absorption scattering cross sections are evaluated for light elements, such as, H, C, N, O, P, and Ca, with relativistic impulse approximation methods. Most of the phantom materials composed of these elements, which are the basic constituents of biological soft-tissue and attenuation through them, provides
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Neutron pumping of active medium formed by gadolinium isotopes 155Gd and 156Gd pair: A feasibility study Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-07 Sergey V. Bedenko, Sergey D. Polozkov, Alexey S. Demin, Nima Ghal-Eh, Faezeh Rahmani, Hector Rene Vega-Carrillo
The possibility of creating technical means for controlling the processes of accumulation and conversion of the energies of thermal and epithermal neutrons into the energy of monoenergetic photons due to neutron pumping of an active medium consisting of nuclei with long-lived isomeric states was studied in this work. The system under study consisted of an external pulse-periodic source of deuterium-tritium
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An investigation of neutron shielding and activation performances of four types of concrete for carbon ion therapy facility Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-07 Yao Yang, Fuhong Ma, Xirui Zhou, Wuyuan Li, Youwu Su, Chong Xu, Bocheng Jiang
Carbon ions have unique physical and biological properties that allow for precise targeting of tumors while minimizing damage to surrounding healthy tissues. The emitted neutrons dominate the radiation field in the treatment room and pose challenges for radiological shielding. Concrete is extensively utilized in the construction of radiotherapy facilities due to its good shielding characteristics,
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Defects and magnetic studies of nanocrystalline cobalt substituted manganese ferrite probed by positron annihilation lifetime spectroscopy and magnetic measurement Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-07 Bahman Zare Khosroabadi, Zohreh Kargar, Hossein Moeini
Cobalt substituted manganese ferrite nanoparticles, MnCoFeO (x = 0.0, 0.1, 0.25 and 0.5) were prepared by co-precipitation procedure. The structural and magnetic properties of ferrite nanoparticles were measured by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and vibrating sample magnetometry (VSM). The lattice constant and cation distribution of ferrite samples were
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Method and equipment for estimation activity nuclides in samples of finite dimensions Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-05 A. Zhukouski, E. Levonyck, N. Sugai, H. Sugai, M. Mogi, A. Khruschinski, S. Kutsen
This study presents a method of measuring the activity of a specific radionuclide Pa in samples placed in bulk transport containers under changing background conditions. The method makes it possible to measure specific activity of Pa in objects without the need for sampling. The change in the effective sample volume limited by the surfaces of the containers is considered depending on the density of
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Designing lightweight neutron absorbing composites using a comprehensive absorber areal density metric Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-05 Andrew O’Connor, Cheol Park, Wesley E. Bolch, Andreas Enqvist, Michele V. Manuel
Efforts to lightweight neutron absorbing composites are limited by incomplete understandings of the interaction between absorbing particles and their matrices. In this study, analytical models and a more physically representative simulation evaluated the penalty to neutron absorbing performance due to neutron channeling between large absorbing particles. Models and simulation agreed that BC particles
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A wireless-controlled lab-scale system for automated gamma column scanning and radiotracer applications Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-05 H.K. Mutinda, M.I. Kaniu, M.J. Mangala, W.M. Kairu
We present a novel wireless-controlled lab-scale system for gamma column scanning and radiotracer applications. The system utilizes a microcontroller for wireless movement of the source and detector along vertical and lateral axes. Acquired data is wirelessly transmitted to a handheld device, enabling real-time scan profiles. The system reduces scan duration, manpower involvement, and radiation exposure
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Hardware algorithm design and validation for nuclear radiation imaging based on Monte Carlo simulation Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-05 Kefeng Zou, Lei Wang, Wei Lu, Penglei Feng, Junqiao Chen, Haoxuan Li
The nuclear radiation imaging technology, aimed at illustrating the position and distribution of radioactive sources, has undergone extensive research. By relying on a simulated radiation imaging system for data acquisition, we can significantly expedite the development cycle of these imaging instruments. Establishing simulated experimental scenarios and radiation imaging systems is of paramount significance
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Temperature-responsive insights: Investigating Eu3+ and Dy3+ activated yttrium calcium oxyborate phosphors for structure and luminescence Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-02 D.A. Jabali, A.Y. Madkhli, G. Souadi, Ümit H. Kaynar, M.B. Coban, O. Madkhali, M. Ayvacikli, Nasser Amri, N. Can
An investigation into the luminescent behavior of YCOB (Yttrium Calcium Oxyborate) doped with Eu and Dy ions, synthesized via the combustion method, is presented. The study, employing X-ray diffraction (XRD), Fourier-Transform Infrared Spectroscopy (FTIR), and Energy-Dispersive X-ray Spectroscopy (EDS) analyses, confirms the structural integrity and purity of the synthesized nanophosphors. An XRD pattern
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On the symmetry of photon detection arrays: A directionally sensitive 3D model Appl. Radiat. Isot. (IF 1.6) Pub Date : 2024-02-02 Harri Toivonen, Mark Dowdall, Sakari Ihantola
A detector's ability to obtain the direction of a radioactive source is an invaluable operational asset. A 2D/3D model was developed based on directionally sensitive arrays. The average location of photon interactions within a symmetrical array yields the direction of the source. The model is validated with simulations and laboratory measurements, maximum systematic error being 5–10° at energies >200 keV