Journal: Journal of Radioanalytical and Nuclear Chemistry

Abbreviation

J. radioanal. nucl. chem.

Publisher

Springer

Journal Volumes

ISSN

0236-5731
1588-2780

Description

Filters

2010 - 201942020 - 20257
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Publications 1 - 10 of 11
  • Quantitative gas-phase separation of carrier-free thallium radioisotopes from proton-irradiated $^{nat}$HgO
    Item type: Journal Article
    Wilson, Jennifer M.; Herrmann, Dominik; Grundler, Pascal V.; et al. (2025)
    Journal of Radioanalytical and Nuclear Chemistry
    Carrier-free $^{202}$Tl was thermally separated from proton-irradiated $^{nat}$HgO. Pressed $^{nat}$HgO targets were irradiated with ≈ 26MeV protons at the IP2 beamline of the high-intensity proton accelerator facility at the Paul Scherrer Institute. The well-known thermal decomposition of HgO at > 470 °C and the strong adsorption of Tl on a Ta surface allowed for a simple and quantitative gas-phase separation of carrier-free Tl from bulk amounts of HgO target material between 550 and 670 °C. The separation efficiency was verified by γ-spectroscopy via the main γ-emissions of $^{202}$Tl and co-produced $^{203}$Hg. This method generally provides a fast and reliable preparation of carrier-free, neutron-deficient Tl radioisotopes (e.g., medically relevant $^{201}$Tl) from a proton-irradiated $^{nat}$HgO matrix.
  • The influence of impurities on the evaporation behavior of Po from liquid Pb-Bi eutectic at high temperatures
    Item type: Journal Article
    Zivadinovic, Ivan; Neuhausen, Jörg; Ivan, Ana Maria; et al. (2025)
    Journal of Radioanalytical and Nuclear Chemistry
    This study presents an in-depth analysis of the polonium evaporation from high-energy and high-intensity proton-irradiated liquid lead-bismuth eutectic. The applied experimental conditions closely mimic those encountered within an accelerator-driven nuclear reactor, particularly focusing on the interaction of other impurities with polonium. Utilizing proton-irradiated lead-bismuth eutectic with an impurity spectrum similar to that of a real reactor, this research establishes reliable data for the polonium evaporation in the presence of said impurities, employing the transpiration method. The results agree well with those of prior model experiments using pure lead-bismuth eutectic. This indicates that the other coexisting impurities have a negligible impact on the polonium evaporation. The good agreement of the experimental values with literature data emphasizes the reliability of the applied methods and the robustness of the current understanding. These findings have significant implications for the operation and safety assessment of heavy metal-cooled nuclear reactors and support the advancement of Generation IV accelerator-driven systems.
  • Validation and improvement of curium radiochronometry to determine the model discharge date of spent nuclear fuels
    Item type: Journal Article
    Guérin, Nicolas; Christl, Marcus; Gagné, Alexandre; et al. (2024)
    Journal of Radioanalytical and Nuclear Chemistry
    This study validates and improves the Cm radiochronometry method developed to determine the model discharge date of nuclear spent fuels based on a three isotopes system, specifically the 244Cm/246Cm and 244Cm/245Cm ratios change since discharge time. Six spent fuel samples with continuous irradiation histories were used. After Cm separation from the matrix, the Cm isotopes were measured by accelerator mass spectrometry using one of the samples as internal standard for normalization. The mean average deviation from the known fuel discharge date improved from 3.3 ± 2.8 to 2.7 ± 2.6 yr when using spent fuel with continuous irradiation.
  • Gas-sensing performance of SnO₂-based chemoresistive sensors after irradiation with alpha particles and gamma-rays
    Item type: Journal Article
    Zonta, Giulia; Astolfi, Michele; Cerboni, Noemi; et al. (2024)
    Journal of Radioanalytical and Nuclear Chemistry
    SnO₂-based chemoresistive sensors were tested for the detection of H₂O and CO impurities both before and after exposure to α-particles and γ-rays, assessing their radiation resistance for use in moderately radioactive environments. The materials examined were SnO₂ with gold nanoparticles, and a mix of Sn-, Ti-, and Nb-oxides. The performance was evaluated in both an open-ended gas-flow setup and in a gas-loop system. Post-irradiation characterization via scanning electron microscopy and energy-dispersive X-ray spectroscopy was performed to assess morphological changes. Preliminary results showed a fast and efficient response of the sensors after irradiation, indicating their suitability for this novel use.
  • Gaseous radioactive iodine retention on silver-loaded zeolites under varying temperatures and atmospheric conditions
    Item type: Journal Article
    Zhang, Haohan; Kou, Xuandong; Liu, Lu; et al. (2025)
    Journal of Radioanalytical and Nuclear Chemistry
    Silver-loaded zeolites are potential materials for capturing gaseous radioactive iodine released during nuclear accidents. In this study, three commercially available silver-loaded zeolites were evaluated for gaseous radioactive iodine (134I) adsorption using gas chromatography between 25 and 1000 °C under inert, oxidizing, and reducing conditions. The setup was validated with 220Rn as a tracer. All tested zeolites demonstrated complete iodine retention up to 1000 °C under both oxidizing and reducing conditions. These results provide experimental insight into the thermal stability and iodine retention behavior of silver-loaded zeolites under simulated severe accident conditions.
  • Effective separation of Am(III) and Cm(III) using a DGA resin via the selective oxidation of Am(III) to Am(V)
    Item type: Journal Article
    Kazi, Zakir; Guérin, Nicolas; Christl, Marcus; et al. (2019)
    Journal of Radioanalytical and Nuclear Chemistry
  • Certified reference material IAEA-418
    Item type: Journal Article
    Pham, M.K.; Betti, M.; Povinec, P.P.; et al. (2010)
    Journal of Radioanalytical and Nuclear Chemistry
  • Synthesis of O- 2- F-18 fluoro-3-(2-nitro-1H-imidazole-1-yl)propyl tyrosine ( F-18 FNT ) as a new class of tracer for imaging hypoxia
    Item type: Journal Article
    Malik, Noeen; Lin, Xian; Löffler, Dirk; et al. (2012)
    Journal of Radioanalytical and Nuclear Chemistry
  • Radionuclides in the waters of the Bukk region, Hungary
    Item type: Journal Article
    Eross, Anita; Surbeck, Heinz; Csondor, Katalin; et al. (2015)
    Journal of Radioanalytical and Nuclear Chemistry
  • Chemical speciation of iodine evaporated from liquid lead-bismuth eutectic investigated by thermosublimatography
    Item type: Journal Article
    Liu, Lu; Zobnin, Vladislav; Zivadinovic, Ivan; et al. (2025)
    Journal of Radioanalytical and Nuclear Chemistry
    This study investigates the evaporation and deposition of iodine from lead–bismuth eutectic (LBE) systems with iodine mole fractions of 10⁻⁵ to 10⁻³, crucial for the safety of LBE-cooled nuclear reactors. Combining thermosublimatography, morphological analysis and thermodynamic calculations, it identifies PbI₂ and BiI₃ as the two primarily deposited species, while revealing BiI disproportionation. This work provides novel insights into iodine speciation, emphasizing its importance for the safety of LBE-cooled reactors and gives input for advancing experimental setups and modeling approaches for complex nuclear systems.
Publications 1 - 10 of 11