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.

Developing a PGNAA setup for heavy metal detection in solid samples
AbstractPrompt gamma-ray neutron activation analysis (PGNAA) is a technique that can be used online or in situ to measure the concentrations of different elements in natural materials without altering the elements' chemical forms in matter. The goal of the current work was to use a 2.5  MeV neutron beam to boost the yield of a portable PGNAA (Genie 16) system. Optimizations were performed to reduce the superimposition between gamma rays from the setup’s elements and those from heavy metals. The value of the new optimization was verified by the improvement of the minimum detecta ble concentrations of sulfur, zinc, titani...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 15, 2024 Category: Nuclear Medicine Source Type: research

Characterization and performance of co-axial HPGe detectors
AbstractHigh purity germanium (HPGe) detectors are deployed globally for gamma-radiation spectroscopy due to their superior energy resolution. In this work, the essential characteristics of n and p-type HPGe detectors, such as energy resolution, efficiency, minimum detectable activity (MDA), and peak shape were studied for the purpose of characterization and performance optimization. The results are obtained for various source-detector configurations in a wide energy range of 40 –1408 keV using gamma sources, such as109Cd,57Co,137Cs,54Mn,65Zn,60Co, and152Eu. Scanning (distance, lateral, and radial) of the detectors was ...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 15, 2024 Category: Nuclear Medicine Source Type: research

Relationship between radium isotopes and their chemical analogues in a hot spring area in Taiwan
AbstractA gamma-ray spectrometry was used to measure radium isotopes in a radium-enriched hot spring area. The activity of224Ra was highly correlated with228Ra in water caused by their same chemical behavior and the origin of the decay series chain. Besides, the radioactivity between radium isotopes (226Ra,228Ra) and the selected chemical analogues in sludge exhibited moderate (Ba and Sr) to strong (Pb) correlations according to linear regression analysis. In contrast, there is less correlation between radium isotopes and40K. These results reveal that radium isotopes may be transported and distributed together in the envir...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 14, 2024 Category: Nuclear Medicine Source Type: research

Investigation of radiation dose-dependent risk on individuals due to drinking water ingestion in Yamunanagar District, India
This study gives information about the uranium concentration in groundwater samples collected from distinct water sources like hand pumps and tube wells from a variety of depths and numerous locations in Yamuna Nagar, Near Shivalik Hills, and the Origin of Saraswati River, India. Uranium concentration was measured using the LED fluorimetry technique. The average value of uranium (13.09  µg L−1) and annual effective dose (2.18  µSv y−1) is found to be within the as reported by WHO (Guidelines for drinking-water quality, World Health Organization, Geneva, 2011) and as reported by AERB (Drinking water specifications ...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 14, 2024 Category: Nuclear Medicine Source Type: research

HNO3 extractability, distribution of macrocycle and radiation stability of strontium-selective extractant based on the dicyclohexano-18-crown-6 solution in 1,1,7-trihydrododecafluoroheptanol
In this study the distribution of DCH18C6 between organic and aqueous phases was determined and the effect of macrocycle stereoisomerism was revealed. Extractability of nitric acid depended on the acidity of initial aqueous phase and did not on DCH18C6 stereoisomerism. Based on the structure of radiolytic intermediates, the main channels of radiation destruction of the macrocycle and the solvent were proposed. The obtained data highlights the potentiality of the DCH18C6/1,1,7-trihydrododecafluoroheptanol for designing a technological process for the selective strontium extraction. (Source: Journal of Radioanalytical and Nuclear Chemistry)
Source: Journal of Radioanalytical and Nuclear Chemistry - February 14, 2024 Category: Nuclear Medicine Source Type: research

Enhancement of U(VI) sorption in natural soils at prospective high-level radioactive waste geological disposal sites with Fe(OH)3-humic acid composite colloids
We examined these characteristics both in the presence and absence of composite colloids composed of Fe(OH)3 and humic acid. To comprehensively understand the adsorption process, we conducted static batch experiments for varying pH, solid contents, and initial U(VI) concentrations. We analyzed the adsorption kinetics and employed microscopic characterization technology to analyze soil samples before and after adsorption, enabling detailed elucidation of the adsorption mechanism. Our findings revealed that the presence of composite colloids leads to a significant increase in the number of adsorption sites and facilitates U(...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 14, 2024 Category: Nuclear Medicine Source Type: research

Studies on parameters affecting uranium leaching from phosphogypsum
AbstractΤhe effect of different parameters such as pH, ligand type (e.g. HCO3−, EDTA, citric acid) and concentration on the uranium leaching from phosphogypsum samples has been investigated as a function of time by means of batch-type experiments, and uranium concentration was analyzed by ICP-OES. The highest leaching rate of uranium has been observed for EDTA, followed by citrate and carbonate. The ligand concentration, which has been studied for 0.01 M and 0.001M, seems to significantly affect the leaching rate only in the case of EDTA, and the effect of pH differs from one ligand to another. (Source: Journal of Radio...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 13, 2024 Category: Nuclear Medicine Source Type: research

An improved radioactive tracer response analysis and injection profile quantification method based on intelligent algorithms
AbstractAn improved radioactive tracer response analysis and interpretation method is proposed. The characteristics of the tracer peaks under different measurement conditions are studied using numerical simulation. An optimization method is designed to solve the tracer ’s transit time passing a certain distance based on ant colony optimization and Nelder–Mead algorithm. The interpretation model is established to calculate the flow velocities using the time-depth relationship. The application example showed that the proposed method could clearly analyze the dow nhole flow situations and quantify the injection profile. (...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 13, 2024 Category: Nuclear Medicine Source Type: research

Relationship between meteorological conditions and atmospheric PM2.5 in uranium mining areas and source analysis
In this study, the relationship between PM2.5 and ambient temperature, humidity, air pressure, wind speed and air indices was investigated by combining specific facilities at uranium mine with villages and cities. Humidity, atmospheric pressure and air quality index were positively correlated with PM2.5 concentration, whereas temperature and wind speed were negatively correlated, while altitude had no correlation with PM2.5 concentration. By constructing the corresponding PMF model data analysis, this study obtained six sources of eight metallic elements (U, Th, Al, Cu, Pb, Cd, Ti, Zn) in PM2.5 around a decommissioned uran...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 12, 2024 Category: Nuclear Medicine Source Type: research

Study of photon interaction parameters in malignant and healthy breast tissues using experimentally determined trace elements
AbstractPhoton interaction parameters can also reveal the development of cancer in breast tissues at various ages. In the present investigations, the MAC values were estimated using EpiXs software for normal and malignant human breast tissues at different age groups by incorporating experimentally determined trace elements by  TXRF (Total reflection x-ray fluorescence) spectrometer. A significant difference in the values of effective atomic number was observed between normal and malignant breast tissues of different age groups. As the present investigations incorporate measured trace elements in EpiXs code, the authors f...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 12, 2024 Category: Nuclear Medicine Source Type: research

A rapid method for simultaneously determining activity of 89Sr and 90Sr in a non-equilibrated 90Sr/90Y system without Cerenkov counting
AbstractA method for determining activity of89Sr and90Sr in a sample where90Sr and90Y are not in equilibrium is presented. The method consists of an experimental design and equations for accurately calculating activity of89Sr and90Sr based on90Yβ particle counts and the total counts ofβ particles emitted from89Sr,90Sr, and90Y in a sample. The equations are derived based on chemical separation sequences,β particle counting sequences, and the Bateman equation. The presented method allows simultaneously obtaining the activity of89Sr and90Sr in a non-equilibrated90Sr/90Y system without the need of Cerenkov counting. (Source...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 12, 2024 Category: Nuclear Medicine Source Type: research

Quantitative comparison between DNA damage RBE of GdNCT and BNCT during brain tumor irradiation
This study aims to quantitatively evaluate the Relative biological effectiveness (RBE) values relevant to two neutron capture therapy (NCT) techniques with Boron and Gadolinium through a hybrid Monte Carlo (MC) simulation. Variations of10B and157Gd concentration in tumor tissue had a negligible impact on the RBE (RBESSB and RBEDSB) values. The obtained RBEDSB values for BNCT were remarkably higher than those of GdNCT. On the other hand, RBESSB values of GdNCT were greater than the obtained values for BNCT. Hence, BNCT has more strength in tumor cell killing due to the higher RBEDSB values. (Source: Journal of Radioanalytic...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 12, 2024 Category: Nuclear Medicine Source Type: research

A simple and fast method for measurement of elemental impurities in powdered U-oxide materials by means of ns-UV laser ablation coupled to a sector-field ICP-MS
AbstractThe determination of elemental impurities in uranium ore concentrates (UOCs) is of great importance in the fields of nuclear forensics and nuclear safeguards and more generally for the nuclear industry. To avoid the use of chemical reagents, prevent waste generation, and reduce the duration of the analysis, a simple method based on sample preparation involving the conversion of UOCs into glass beads by alkaline fusion followed by direct measurement by laser ablation —sector-field ICP-MS (LA-ICP-MS) is proposed. External calibration was performed with a mix of UOCs and geological standard reference materials. Accu...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 12, 2024 Category: Nuclear Medicine Source Type: research

Determination of 93Zr, 237Np and Th radionuclides in radioactive waste and mineral samples: extension of the method for determination of actinides
AbstractA novel method has been developed for the simultaneous determination of difficult-to-measure (DTM) nuclides93Zr,237Np,232Th,230Th and228Th using a DGA resin® (containing N,N,N ′,N′-tetra-n-octyl-diglycolamide) column for simultaneous separation of Zr and actinides followed by purification of Zr, Np and Th on a TEVA resin® (containing Aliquat 336) column. Samples are destroyed by fusion with sodium hydroxide or by acid destruction using HNO3, HCl and HF. Pre-concentration procedure tailored to the extraction chromatography is based on co-precipitation of Zr and actinides and removal of alumina, silica, iron an...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 12, 2024 Category: Nuclear Medicine Source Type: research

Full automation of the radiosynthesis of N-succinimidyl-4-[18F]fluorobenzoate ([18F]SFB) on the ALL IN ONE synthesizer
AbstractN-Succinimidyl-4-[18F]fluorobenzoate, also known as [18F]SFB, is a secondary labeling and imaging agent that has been developed for imaging applications in the Positron Emission Tomography (PET). A fully optimized and configured preparation procedure, including reaction factors, and designed a robust program for the synthesis. The program has undergone several modifications to ensure a smooth and automated synthesis program consisting of multiple steps. Comparable radiochemical yields (32 –57% ± 5%, n = 25) to previously reported procedures are achieved with acceptable reaction time and high radiochemica...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 12, 2024 Category: Nuclear Medicine Source Type: research