Journal of Radioanalytical and Nuclear Chemistry This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Baseline study on radiological and mineralogical investigations of heavy mineral depositions on the south –west coast of India
AbstractPristine depositions of beach sediments containing heavy minerals (HM) along the shorelines of Mangalore, south –west coast of India is reported in the study. Primordial radionuclide concentrations in the beach sediments collected were determined by high purity germanium (HPGe) gamma spectrometry method. The mineral identification and counting were performed using polarizing microscope. Geometric mean value s (GM) [Geometric Standard Deviation (GSD)] of concentrations of40K,232Th and226Ra are obtained to be 139 (2), 482 (5) and 110 (4) Bq  kg−1 respectively and total heavy mineral weight percentage (TM%) of Mo...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 17, 2023 Category: Nuclear Medicine Source Type: research

Evaluation of natural radioactivity and assessment of dose increase due to the use of fertilizers produced in Poland
In this study 16 samples of co mmercially available fertilizers produced in Poland were selected for preliminary radiological evaluation. The samples were measured by means of low background gamma spectrometry. The results showed high concentrations of40K in potassium and multinutrient fertilizers (2.3 –13.8 kBq kg−1), and relatively high concentrations of uranium and radium isotopes in phosphate fertilizers. The obtained results allowed to calculate radium equivalent activity, absorbed dose rate increase and increase in annual effective dose equivalent. (Source: Journal of Radioanalytical and Nuclear Chemistry)
Source: Journal of Radioanalytical and Nuclear Chemistry - November 17, 2023 Category: Nuclear Medicine Source Type: research

Ruthenium behavior in the reactor cooling system in case of a PWR severe accident: study of oxidative conditions with stainless steel tube
AbstractIn the research field on severe accidents in nuclear power plant, a specific scenario correspond to accident with oxidative conditions for which damaged fuel can be highly oxidised with significant releases of ruthenium oxides. Ruthenium chemistry is complex, and the current knowledge has to be deepened to better assess ruthenium source term with potential radioactive releases to the environment as volatile ruthenium tetroxide. In this work, experimental studies are focused on ruthenium behaviour along a stainless-steel thermal gradient tube, with maximum temperature of 1200  °C, simulating the reactor cooling sy...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 15, 2023 Category: Nuclear Medicine Source Type: research

Effect of preparation methods on the morphology of jarosite and its adsorption performance for U(VI)
In this study, jarosite was synthesized using different methods, including the bio-oxidation byAcidithiobacillus ferrooxidans (BAF), rapid addition of H2O2 (RAH), and slow addition of H2O2 (SAH). The synthesized jarosite samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FTIR). The influence of pH, adsorption time, and adsorbent dosage on the adsorption performance of U(VI) by jarosite was investigated through static adsorption experiments. The results revealed that jarosite with petal-like, granular, and spherical morphologies was obta...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 14, 2023 Category: Nuclear Medicine Source Type: research

Uranium age dating measurements by laser ablation multi-collector ICP-MS in uranium materials
AbstractThe aim of the present work was to develop a direct method for age dating (production date measurement) of uranium samples by laser ablation multi-collector inductively coupled plasma mass spectrometry (LA-MC-ICP-MS) by the measurement of the230Th/234U ratio. The major instrumental conditions and sample characteristics affecting the accuracy and precision were investigated in this systematic study. By comparing the obtained LA-MC-ICP-MS results with those obtained after chemical separation measurements, it shows that the LA-MC-ICP-MS method is capable to produce accurate results for pure highly enriched uranium. Na...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 14, 2023 Category: Nuclear Medicine Source Type: research

Synthesis of deuterium-labeled celecoxib and its metabolites
AbstractCelecoxib are COX2 inhibitors approved to reduce the COX2 level. Celecoxib and its major metabolites labeled with deuteriums are applied for drug metabolism studies. [2H4] celecoxib was prepared from [2H4] 4-acetamidobenzenesolfonyl through amination, hydrosis, diazotization, reduction and cyclization. After bromination and hydrolysis reaction, [2H4] hydroxy celecoxib was obtained and further oxidized by tetrabutylammonium permanganate to afford [2H4] celecoxib carboxylic acid. The title compounds showed remarkable chemical purity and isotope abundance which can be utilized in pharmacokinetic research. (Source: Jou...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 14, 2023 Category: Nuclear Medicine Source Type: research

Analysis of mixture samples of uranium dioxide and boron compounds by using thermal neutron prompt gamma activation analysis
AbstractThe internal mono-standard relative method has been used for compositional analysis of prompt gamma activation analysis (PGAA). PGAA is very useful for the analysis of boron elements in various sample matrices, especially in the uranium samples, which attenuates neutron intensity significantly. The concentration ratio of boron is determined relative to the uranium as internal mono-standard. The concentration of uranium is well traceable when the sample was fabricated and also measured by a relative method using certified reference material. The uranium dioxide powder samples were prepared by crushing the fuel pelle...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 14, 2023 Category: Nuclear Medicine Source Type: research

Radon and uranium content distribution in groundwater of the Eorae mountain area, Chungju, Korea
AbstractEorae mountain which is located in the Ogcheon metamorphic zone, was reported high radioactivity rock character. Therefore, 68 groundwaters around Eorae mountain area were sampled according to the geological radioactivity data and radioactive element such as uranium and radon (222Rn) were analyzed to understand radioactive element distribution. U and222Rn contents distribution was different around Gongju fault line. The U content ranged from  <  0.07 to 84.7 μg/L and222Rn content ranged from 1.01 to 428 Bq/L. The average U and222Rn content of northern and eastern part were high, which place was close to Eor...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 14, 2023 Category: Nuclear Medicine Source Type: research

Suspension polymerization method for preparing plastic scintillation microspheres
In this study, PSm materials were prepared via suspension polymerization and the repeatability of both the synthesis conditions and the radioactivity measurement performance were evaluated. Results indicated that PSm with a particle size distribution ranged around 90 –200 μm can be reproducibly synthesized under certain conditions. Consistent counting efficiency for the14C measurement in liquid samples using PSm has been obtained as long as sufficient PSm was added into the scintillation vial to completely cover the liquid volume. By comparing the spectral widths of samples with different concentrations of fluors, opti...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 14, 2023 Category: Nuclear Medicine Source Type: research

Preparation of 3D ethylcellulose-based electret fiber aerogel for simulated radioactive aerosol purification
In this study, a three-dimensional biomass-based electret nanofiber aerogel material with high dust capacity, high filtration efficiency and low-pressure drop was created by pore structure regulation. The results showed that aerogels with good charge capture and storage ability were obtained by regulating the concentration of tert-butanol and ethylcellulose fiber suspension, and the pre-freezing temperature. The initial surface potential and stable surface potential increased from 0.85 and 0.05  kV to 1.37 and 0.15 kV respectively. Furthermore, the purification time was reduced from 44 to 15 min. (Source: Journal of Rad...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 11, 2023 Category: Nuclear Medicine Source Type: research

Car-borne survey to construct the distribution of absorbed dose rate in air in the Tehri Garhwal region, India
AbstractAbsorbed dose rate in air for the Tehri Garhwal region of Uttarakhand state, India was measured using a vehicle-mounted NaI(Tl) scintillation spectrometer. The average values of absorbed dose rate in air for Jakhana and New Tehri areas in this region were 150 nGy  h−1 and 88 nGy  h−1, respectively, and the respective estimated average external effective doses for the areas were 1.06  mSv y−1 and 0.62  mSv y−1. Higher dose rates observed in the Jakhana area were possibly related to uraninite and sericite which were formed as a result of hydrothermal alteration and found in the area. (Source: Journal of...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 11, 2023 Category: Nuclear Medicine Source Type: research

Influence of Ba concentration on Ra and 210Pb extraction from aqueous samples using EMPORE ® radium RAD disks
AbstractThe separation procedure for Ra isotopes and210Pb from water using the EMPORE ™ radium RAD disks is very quick and convenient. However, higher levels of the chemically similar Ba in the water at least partly prohibit the uptake of Ra and210Pb, hampering the correct determination of these radionuclides. This investigation shows that the decrease of extraction yield in dependence of the Ba mass is much slower for Ra than for210Pb: With a Ba content  ≤ 1 mg in the water sample,226Ra could be separated completely,210Pb, however, showed a decreasing recovery already at 0.1  mg Ba addition. (Source: Journal of ...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 11, 2023 Category: Nuclear Medicine Source Type: research

Sorption of Cs, Sr, and Co from a solution by a composite sorbent (ClSZ) based on zeolite depending on the activation temperature
AbstractStudy of the influence of zeolite activation temperature on the sorption of a mixture of remove radionuclides Cs, Sr, Co. The activation temperature ranged from 150 to 450  °C. It was found that temperature activation did not lead to changes in clinoptilolite structure. After thermal activation, in all the considered temperature ranges, the sorption properties of clinoptilolite decreased by 15%. For composite sorbents, activation at 150 °C was the most effective. In this case, composite sorbents exhibited complex interactions with the mixture of radionuclides. Cs sorption decreased by 7%, Sr sorption increased ...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 10, 2023 Category: Nuclear Medicine Source Type: research

Comparison of niobium-93m results obtained by two independent destructive analytical procedures and measured by low energy gamma spectrometry and liquid scintillation counting
This article presents two newly developed radiochemical procedures for the destructive analysis of niobium plates irradiated in the core of water-water energetic nuclear reactor (WWER), as well as determination of the specific activity of the generated during the irradiation metastable isotope93mNb. The procedures were developed and tested using standard samples containing93mNb and94Nb. Measurements were made by low energy gamma spectrometry (LEGS) and liquid scintillation counting (LSC) and the obtained data were verified by interlaboratory comparison. All the results were compared with the calculated ones to confirm and ...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 10, 2023 Category: Nuclear Medicine Source Type: research

Whole process establishment of carrier-free 177Lu production: from small-scale production to pilot-scale production
AbstractIn this research, whole process of small-scale and pilot-scale carrier-free177Lu production have been developed and curie-level177Lu was achieved. Additionally, the methodology of product key quality control inspection has been developed and verified, the control standard has been established. Key indicators of the product have met or exceeded the requirements of the European Pharmacopoeia. Up to date, about 30  Ci carrier-free177Lu product has been obtained based on this development. The carrier-free177Lu obtained in this research has been used in nearly 20 trial parties including units for drug R& D and clin...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 10, 2023 Category: Nuclear Medicine Source Type: research