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.

Prompt gamma rays of terbium induced by inelastic scattering of fission neutrons
AbstractPrompt gamma rays of terbium emitted after (n,n ʹγ) inelastic scattering reactions induced by irradiation of a terbium(III) hexahydrate (TbCl3·6H2O) sample with a beam of fission neutrons were investigated with the instrument FaNGaS (Fast Neutron-induced Gamma-ray Spectrometry) at an angle of 90 ° between neutron beam and detector. At sample position, the fast-neutron flux was 1.13 × 108 cm−2 s−1 and the neutron beam has an average energy of 2.30  MeV. We identified 124 prompt gamma lines from the159Tb(n,n ʹγ)159Tb reaction. Presence of prompt gamma rays from oxygen and chlorine was used for a con...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 6, 2024 Category: Nuclear Medicine Source Type: research

Comparative study of the radon and thoron concentrations in the indoor environment of the Budhakedar region of the Garhwal Himalaya, India
AbstractThe present study is based on the measurement of the radon and thoron concentrations in the indoor environment of the tectonically active zone of the Garhwal Himalaya region using the portable SMART RnDuo monitor. The concentration of the indoor radon and thoron varies from 60  ± 17 to 213 ± 49 Bq m−3 (with an arithmetic mean of 100  ± 27 Bq m−3) and 33  ± 18 to 217 ± 94 Bq m−3 (with an arithmetic mean of 76  ± 33 Bq m−3), respectively. The significant contribution of thoron concentration was observed in the present study. The average values of indoor radon and thoron c...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 6, 2024 Category: Nuclear Medicine Source Type: research

Naturally occurring radioactive materials (NORM) concentration and health risk assessment of aerosols dust in Nicosia, North Cyprus
This study was carried out to evaluate the distribution of naturally occurring radioactive materials (NORM) and radiological risk indexes in aerosol dust in Nicosia, Cyprus utilizing a high-resolution HPGe gamma-spectrometry. The activity concentrations of226Ra,232Th, and40K in the selected aerosol dust samples ranged from 25.9 –52.4, 21.7–46.3, to 471–1302 Bq kg−1, respectively. The average activity concentrations of40K were found to be above the Earth's crust average. The internal and external hazard indexes are well below the acceptable limit in most dust samples. All investigated samples met the exemption dose...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 6, 2024 Category: Nuclear Medicine Source Type: research

Delineating the radiological dosimetry arising from radon exposure in potable water sources of Dehradun, India
This study examines 52 water samples from diverse locations in the Dehradun district, measuring radon activity concentrations with a scintillation-based monitor. The findings indicate an average concentration of 33.97  Bq/L, ranging from 3.35 to 99.25 Bq/L. Beyond this, the research estimates annual effective ingestion (µSv/y), inhalation (µSv/y), and total (µSv/y) doses attributed to radon in the drinking water samples, offering insights into potential health risks. Additionally, the study explores spatial patterns in the dataset, providing a geographic perspective on radon distribution across the region. This spatia...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 6, 2024 Category: Nuclear Medicine Source Type: research

Construction of an oxygen-incorporated fungal hyphae-MoS2 Schottky junction for enhanced uranium (VI) photoreduction
In this study, the FH-MoS2-O heterojunction was prepared by a synergistic strategy of oxygen injection and Schottky junction construction, thereby enhancing electron transfer in the material and generating more photoelectrons. This facilitates the continuous reduction of uranium and the photocatalytic degradation of organic matter in wastewater. In simulated radioactive waste liquid with a concentration of 8  mg/L, the FH-MoS2-O heterojunction achieves an impressive U(VI) removal rate of 91.9%. When the initial concentration of U(VI) is 100  mg/L, the removal capacity reaches 251.76 mg/g. Furthermore, the presence of ex...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 4, 2024 Category: Nuclear Medicine Source Type: research

Analyzing porosity of compacted bentonite via through diffusion method
AbstractThe diffusion behavior of ReO4− (as a surrogate for99TcO4−) and HSeO3− (as a surrogate for79HSeO3−) in compacted Wyoming bentonite was investigated. A through-diffusion experiment was conducted to measure the effective diffusion coefficient and the accessible porosity at high salinity. Two multi-porosity models (MP1 and MP2) were employed to analyze the effect of compaction on the accessible porosity, the diffuse double-layer porosity, and the interlayer porosity. The diffuse double-layer porosity increased with increasing the external surface area. (Source: Journal of Radioanalytical and Nuclear Chemistry)
Source: Journal of Radioanalytical and Nuclear Chemistry - February 4, 2024 Category: Nuclear Medicine Source Type: research

Comparison of adsorption of U(VI) by magnetic MCM-41, MCM-48 and SBA-15 mesoporous silicas
AbstractThree types of magnetic mesoporous silicas (MMSs), namely, MMCM-41, MMCM-48 and MSBA-15 were prepared by a hydrothermal method using CTAB and P123 as templates. The structure and physicochemical properties of MMSs were characterized by small angle XRD, VSM, ζ potential analyzer, contact angle measurer, and XPS, etc. The potential applications of MMSs in U(VI) recovery were thoroughly investigated. The adsorptive kinetics, thermodynamics, and selectivity of MMCM-41, MMCM-48 and MSBA-15 were compared. The results show that MSBA-15 revealed a high capaci ty for U(VI) (341.94 mg·g−1) and a superior selectivity tha...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 4, 2024 Category: Nuclear Medicine Source Type: research

Rapid radiochemical analysis of uranium and plutonium in emergency urine samples
AbstractA novel method for rapid radioanalytical measurement of uranium and plutonium in 100ml emergency urine samples was developed, through optimized selection of the separation and purification process and a combined measurement with ICP-TOF-MS and alpha spectrometry. The typical analytical time is within 6  h, the recovery rates are more than 80%, and the minimum detection activity concentrations are 3.4 × 10−4 Bq/L for238U and 2.5  × 10−3 Bq/L for239Pu respectively. The spiked test shows that this method can be used for quantitative evaluation of the activity concentration of238U and239Pu in urine sam...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 3, 2024 Category: Nuclear Medicine Source Type: research

Role of 18F-FDG PET/CT for predicting bone marrow involvement, disease relapse and histopathological transformation in follicular lymphoma —a single centre observation
The objective of present study is to assess the role of the [18Fluorine] 2-Fluoro-2-Deoxy-D-Glucose Positron-Emission-Tomography Computed-Tomography (18F-FDG PET/CT) scan to detect the bone marrow involvement, predict disease free interval (DFI) and histopathological Transformation (HT) in Follicular Lymphoma (FL). Sixty patients were evaluated. Staging18F-FDG PET/CT scan showed poor sensitivity for bone marrow involvement. Thus, staging18F-FDG PET/CT cannot replace initial bone marrow biopsy in FL. Maximum standardized uptake value (SUVmax) of lymphomatous lesions in staging18F-FDG PET/CT scan has no correlation with DFI ...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 3, 2024 Category: Nuclear Medicine Source Type: research

Solvent extraction of uranium from leach liquor using dibutyl carbitol: optimization of parameters by response surface methodology
AbstractIn this research, the potency of uranium extraction by dibutyl carbitol solvent has been investigated. The cheapness of this solvent is advantageous. Response surface methodology was applied to design the experiments and analyze the results to evaluate the effects of four effective variables, i.e., nitric acid concentration, dibutyl carbitol concentration, temperature, and mixing time to determine optimal conditions. The optimal conditions of uranium extraction were obtained at nitric acid concentration 30%, dibutyl carbitol concentration 60%, and T  = 20 °C. Under these conditions, uranium extraction was 50....
Source: Journal of Radioanalytical and Nuclear Chemistry - February 3, 2024 Category: Nuclear Medicine Source Type: research

Diffusive transport of selenium oxyanions in compacted natural clays: role of selenium speciation and clay geochemistry
AbstractPredictive subsurface transport of selenium oxyanions is important for the assessment of long-term nuclear waste repository performance, as well as monitoring compliance of selenium presence in groundwater once discharged from industry, agriculture or natural seleniferous minerals. The aim of the present study is to quantify the diffusion of selenite and selenate through water-saturated compacted clays of smectite and illite rich geochemistry. Diffusion coefficient (De) values for selenium oxyanions in argillaceous clay are ̴ 10–12 m2s−1 and are nearly an order of magnitude higher in the bentonite clay. Resul...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 3, 2024 Category: Nuclear Medicine Source Type: research

Effect of bubble flow on radon transfer at the water –air interface: experimental studies using optical methods
This study investigates the impact of varying degrees of bubble flow on radon migration at the water –air interface. An apparatus was designed to monitor the change in the activity concentration of radon transferred from water to air at different levels of bubble flow, and high-speed cameras were used to capture the bubble flow. The optical method determined the captured images’ bubble size and average flow velocity. A mathematical model was used to estimate and experimentally measure the activity concentration of radon in air, resulting in the determination of the optimal radon transfer velocity coefficient (K). Based...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 3, 2024 Category: Nuclear Medicine Source Type: research

137Cs contamination of Japanese mustard spinach by resuspended particles in areas with different contamination conditions
AbstractWe investigated cesium-137 (137Cs) transfer to Japanese mustard spinaches (spinach) due to resuspended particles across the multiple sites in Fukushima Prefecture, Japan. At a site located in difficult-to-return zone,137Cs deposition in pots placed near the ground increased. However, there was no significant difference in the amount of137Cs in spinach placed near the ground and those placed far from the ground.137Cs adsorption to the spinach was less than 10% of the137Cs deposition at each study site. For future study, it is necessary to evaluate the effects of weather and growth conditions on137Cs absorption to th...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 3, 2024 Category: Nuclear Medicine Source Type: research

Composite magnetic sorbents based on magnetic Fe3O4 coated by Zn and Al layered double hydroxide for U(VI) removal from aqueous media
AbstractComposite sorbents based on Fe3O4 and Zn-Al-LDH with different weight ratios of magnetic and sorbing phases were obtained by the precipitation method. The optimal weight ratio of Zn/Fe was 16, which resulted in a 62% increase in hydromechanical strength. The maximum sorption exchange capacity towards U(VI) was 268.65  ± 22.22 mg/g. The efficiency of U(VI) adsorption was not affected by the presence of Cl−, SO42 −, NO3− and Na+, Ca2+. The distribution coefficient in a groundwater model solution was Kd(U(VI)  = 0.5–3 × 105 mL/g. The materials possess high exchange capacity and selectivity, whi...
Source: Journal of Radioanalytical and Nuclear Chemistry - February 1, 2024 Category: Nuclear Medicine Source Type: research

Estimation of radionuclides in the soil samples from the uranium mining zone of Sikar, Rajasthan, India
AbstractThe presence of underlying uranium deposits may contaminate the upper soil of a region. We have carried out a detailed investigation of radionuclides (Ra, Th, and K) present in the soil around the reported uranium deposit site in the Sikar district of Rajasthan, India. Measurements are carried out using the state-of-the-art gamma-ray spectroscopy (HPGe detector) technique. The specific activity of226Ra,232Th, and40K are found in the range of 9.5  ± 0.5–50.6 ± 1.0 Bq kg−1, 11.0  ± 0.4–83.2 ± 1.5 Bq kg−1, and 177  ± 13–753 ± 47 Bq kg−1 with the mean values of 17.8  ±...
Source: Journal of Radioanalytical and Nuclear Chemistry - January 30, 2024 Category: Nuclear Medicine Source Type: research