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Journal of Radioanalytical and Nuclear Chemistry

Renáta Buják, Laurens Delva, Mustafa Erkoç, Jeroen Bauwens, Rožle Jakopič, Laszlo Vincze, Yetunde Aregbe, Ludwig Cardon
Characterization of cellulose acetate butyrate (CAB) thin films with 17, 35 and 52 wt% butyryl is carried out to select the most suitable matrix material for the U and Pu containing large-sized dried spike reference material. The virgin CAB samples were aged by vibrations, heat, humidity, UV light and X-rays. Characterization was done by thermo-analytical techniques, gel permeation chromatography, mechanical tests and via Rayleigh and Compton scattering. The results show that CAB with lower butyryl content can withstand higher operational temperatures and has greater mechanical strength while CAB with higher butyryl content seems to be more resistant to radiation...
2017: Journal of Radioanalytical and Nuclear Chemistry
Alicja Boryło, Grzegorz Romańczyk, Bogdan Skwarzec
In the study the activities of polonium (210)Po and uranium (234)U, (238)U radionuclides in moss and lichen samples were determined using the alpha spectrometry. Different lichens and mosses were collected around the Sobieszewo Island (northern Poland) and investigated for potential use as biomonitors for (210)Po and (238)U deposition. Mosses and lichens have a high efficiency in capturing (210)Po and (238)U from atmospheric fallout. The obtained results showed that (210)Po, (238)U concentrations are changing in analyzed thallophytes samples depending on the type of thallus...
2017: Journal of Radioanalytical and Nuclear Chemistry
Michael Green, Jonathan Lowe, Manikandan Kadirvel, Adam McMahon, Nigel Westwood, Sue Chua, Gavin Brown
Meta-iodobenzylguanidine (mIBG) has been radiolabelled at the no-carrier-added level with [(124)I] for a proof of concept study to assess the diagnostic accuracy of [(124)I]mIBG PET/CT in detecting metastatic deposits in patients diagnosed with metastatic neuroblastoma. Radiolabelling of mIBG was achieved via the iododesilylation reaction between [(124)I]sodium iodide and meta-trimethylsilylbenzylguanidine. [(124)I]mIBG was produced in 62-70 % radioiodide incorporation yield from [(124)I]sodium iodide. The average amount of formulated [(124)I]mIBG was 359 MBq (range 344-389 MBq) with an average specific radioactivity of 4...
2017: Journal of Radioanalytical and Nuclear Chemistry
Shayan Shahbazi, S Adam Stratz, John D Auxier, Daniel E Hanson, Matthew L Marsh, Howard L Hall
This work reports the thermodynamic characterizations of organometallic species as a vehicle for the rapid separation of volatile nuclear fission products via gas chromatography due to differences in adsorption enthalpy. Because adsorption and sublimation thermodynamics are linearly correlated, there is considerable motivation to determine sublimation enthalpies. A method of isothermal thermogravimetric analysis, TGA-MS and melting point analysis are employed on thirteen lanthanide 1,1,1,5,5,5-hexafluoroacetylacetone complexes to determine sublimation enthalpies...
2017: Journal of Radioanalytical and Nuclear Chemistry
Katarzyna Kiegiel, Anna Abramowska, Paweł Biełuszka, Grażyna Zakrzewska-Kołtuniewicz, Stanisław Wołkowicz
Solvent extraction of uranium from acidic and alkaline post-leaching liquors that were obtained by leaching of Polish ores is reported in this paper. The stripping of uranium from organic to aqueous phase was also studied. The synergistic mixture of 2-diethylhexylphosphoric acid (D2EHPA) and tri-n-butylphosphate (0.2 M:0.2 M) was found as a good extracting agent for uranium. Recovery of uranium was reached even 98 %. The effect of such parameters like uranium concentration and concentration of reagents used in the experiments was evaluated in advance by using a model uranium solutions...
2017: Journal of Radioanalytical and Nuclear Chemistry
M Blaauw, D Ridikas, S Baytelesov, P S Bedregal Salas, Y Chakrova, Cho Eun-Ha, R Dahalan, A H Fortunato, R Jacimovic, A Kling, L Muñoz, N M A Mohamed, D Párkányi, T Singh, Van Dong Duong
Molybdenum-99 is one of the most important radionuclides for medical diagnostics. In 2015, the International Atomic Energy Agency organized a round-robin exercise where the participants measured and calculated specific saturation activities achievable for the (98)Mo(n,γ)(99)Mo reaction. This reaction is of interest as a means to locally, and on a small scale, produce (99)Mo from natural molybdenum. The current paper summarises a set of experimental results and reviews the methodology for calculating the corresponding saturation activities...
2017: Journal of Radioanalytical and Nuclear Chemistry
E J Charlotta Nilsson, Per Kristiansson, Linus Ros, Nathaly De La Rosa, Mikael Elfman, Ulf Hålenius, Jan Pallon, Henrik Skogby
Ion beam analysis has for decades been used as a tool for geochemical analysis of trace elements using both X-rays (particle induced X-ray emission) and nuclear reaction analysis. With the geoanalytical setup at the Lund Ion Beam Analysis Facility, the boron content in geological samples with a spatial resolution of 1 µm is determined through nuclear reaction analysis. In the newly upgraded setup, a single detector has been replaced by a double sided silicon strip detector with 2048 segments. After optimization, boron content in geological samples as low as 1 µg g(-1) can be measured...
2017: Journal of Radioanalytical and Nuclear Chemistry
Ge Xiao, David Saunders, Robert L Jones, Kathleen L Caldwell
Quantification of (241)Am in urine at low levels is important for assessment of individuals' or populations' accidental, environmental, or terrorism-related internal contamination, but no convenient, precise method has been established to rapidly determine these low levels. Here we report a new analytical method to measure (241)Am as developed and validated at the Centers for Disease Control and Prevention (CDC) by means of the selective retention of Am from urine directly on DGA resin, followed by SF-ICP-MS detection...
July 2016: Journal of Radioanalytical and Nuclear Chemistry
Martin Shetty, Dağıstan Şahin
Coincidence counting in neutron activation analysis has well-known advantages, most importantly improvement of detection limits. One obstacle to the wider use of this technique is the complexity of the data acquisition and reduction systems that it requires. The usual approaches to multi-detector data acquisition incur significant dead-time, involve redundant work in repeatedly developing limited tools and risk potential errors in low-level code. The paper describes progress made in developing a software framework to address these shortcomings...
July 2016: Journal of Radioanalytical and Nuclear Chemistry
Stephen P LaMont, Samuel E Glover
No abstract text is available yet for this article.
March 2016: Journal of Radioanalytical and Nuclear Chemistry
S Adam Stratz, Steven A Jones, Colton J Oldham, Austin D Mullen, Ashlyn V Jones, John D Auxier, Howard L Hall
This study presents the first known detection of fission products commonly found in post-detonation nuclear debris samples using solid sample introduction and a uniquely coupled gas chromatography inductively-coupled plasma time-of-flight mass spectrometer. Rare earth oxides were chemically altered to incorporate a ligand that enhances the volatility of the samples. These samples were injected (as solids) into the aforementioned instrument and detected for the first time. Repeatable results indicate the validity of the methodology, and this capability, when refined, will prove to be a valuable asset for rapid post-detonation nuclear forensic analysis...
2016: Journal of Radioanalytical and Nuclear Chemistry
Andrzej Olejniczak, Jacek Fall, Katarzyna Olejniczak, Marina V Gustova, Alexandr G Shostenko
A solid phase extraction method for removing polar tritiated contaminants from tritium-containing waste oils has been developed. The composition of the degradation products present in the waste oil was determined. The results indicated that upon exposure to tritium gas, fragment methyl ketones, carboxylic acids, and lactones were the main polar products of the mineral-based oil oxidation. The nonpolar fragmentation products included n-alkanes, monomethylalkanes, and acyclic isoprenoids and were analogous to those formed during [Formula: see text]-irradiation of the oil...
2016: Journal of Radioanalytical and Nuclear Chemistry
M Gumiela, J Dudek, A Bilewicz
Technetium-99m is the most widely used radionuclide in nuclear medicine. This work describes the method to separate (99m)Tc from irradiated (100)Mo target. For this purpose we utilized formation of ammonium molybdenum phosphate (AMP) and have optimized the four parameters of the process. The proposed process is promising and allows fast separation of macroamounts of molybdenum without co-precipitation of (99m)Tc. The concentration of molybdenum in solution after precipitation of AMP was lower than 300 µg ml(-1)...
2016: Journal of Radioanalytical and Nuclear Chemistry
Sheng Xu, Gordon T Cook, Alan J Cresswell, Elaine Dunbar, Stewart P H T Freeman, Xiaolin Hou, Helen Kinch, Philip Naysmith, David W C Sanderson, Luyuan Zhang
Japanese cedar leaves from Iwaki, Fukushima were analyzed for carbon, cesium and iodine isotopic compositions before and after the 2011 nuclear accident. The Δ(14)C values reflect ambient atmospheric (14)C concentrations during the year the leaves were sampled/defoliated, and also previous year(s). The elevated (129)I and (134,137)Cs concentrations are attributed to direct exposure to the radioactive fallout for the pre-fallout-expended leaves and to internal translocation from older parts of the tree for post-fallout-expended leaves...
2016: Journal of Radioanalytical and Nuclear Chemistry
Jerzy W Mietelski, Renata Kierepko, Edyta Łokas, Anna Cwanek, Krzysztof Kleszcz, Ewa Tomankiewicz, Tomasz Mróz, Robert Anczkiewicz, Mirosław Szałkowski, Bogdan Wąs, Mirosław Bartyzel, Ryszard Misiak
The paper summarizes results of investigation of the current state of radioactive contamination on site being under consideration for planned nuclear power plant in northern Poland. Thanks to use of sequential procedure it was possible to determine activity concentrations for radioisotopes of nine elements, both natural and artificial. Results show that observed levels of radioactive contamination are rather typical for central Europe and global fallout is dominant factor of presence of artificial radionuclides...
2016: Journal of Radioanalytical and Nuclear Chemistry
Iga Kużelewska, Halina Polkowska-Motrenko, Bożena Danko
A procedure based on radiochemical neutron activation analysis was developed for the determination of chromium in biological materials. The procedure consists of irradiation of reference and test samples in a nuclear reactor, microwave sample digestion, selective and quantitative radiochemical separations of chromium and gamma-ray spectrometric measurement of (51)Cr. Separation of chromium from the accompanying elements was done on the column packed with inorganic resin MnO2 Resin. Distribution coefficients of Cr, Zn, Co, Cs and Sc were determined in the system: MnO2 Resin-HCl, HNO3 and H2SO4...
2016: Journal of Radioanalytical and Nuclear Chemistry
Hongtao Liu, Nanping Wang, Xingming Chu, Ting Li, Ling Zheng, Shouliang Yan, Shijun Li
In order to identify radon-prone areas and evaluate radon risk level, a soil gas radon survey combined with gamma-ray spectrometry measurements was carried out in Shenzhen City, south China. Meanwhile, the statistical analysis was applied to evaluate the distribution of measured results. This paper presents the methodology of the radon risk assessment. A radon risk map was accomplished based on a combination of soil gas radon concentration (RC), soil air permeability (Perm.) and uranium ((238)U) concentration...
2016: Journal of Radioanalytical and Nuclear Chemistry
Judit Krajkó, Zsolt Varga, Maria Wallenius, Klaus Mayer, Rudy Konings
The applicability and limitations of sulphur isotope ratio as a nuclear forensic signature have been studied. The typically applied leaching methods in uranium mining processes were simulated for five uranium ore samples and the n((34)S)/n((32)S) ratios were measured. The sulphur isotope ratio variation during uranium ore concentrate (UOC) production was also followed using two real-life sample sets obtained from industrial UOC production facilities. Once the major source of sulphur is revealed, its appropriate application for origin assessment can be established...
2016: Journal of Radioanalytical and Nuclear Chemistry
Magdalena Długosz-Lisiecka
The two counting modes: a normal with a single HPGE detector and second with the additional anti-Compton shield of the annular NaI(Tl) detector have been compared for fast determination of the activity concentration of thorium (232)Th in the building materials. The (232)Th activity concentration was calculated by measurement of its decay products: (212)Pb, (212)Bi and (208)Tl as well (228)Ac content. Although the Compton suppression mode applied in gamma spectrometry systems in general increase sensitivity of the analysis, but in case of 583 keV the most abundant (208)Tl γ-line, the significant reduction of photon counting rate was observed...
2016: Journal of Radioanalytical and Nuclear Chemistry
Stefaan Pommé, Ljudmila Benedik
Pommé et al. published a paper claiming that the (209)Po half-life is 20 % higher than the erroneous value of 102 (5) a used for 50 years. Collé and Collé published a critique saying that 'this claim cannot withstand critical scrutiny'. In this work, counterarguments are presented to the critique. The experiment has been continued and a new intermediate half-life value of 122.7 (27) a was obtained. A brief review is made of the (209)Po half-life value by Collé et al. and a recommended value of 122.9 (23) a is derived from both experiments...
2016: Journal of Radioanalytical and Nuclear Chemistry
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