Abstract
Alpha radiolysis of nitric acid aqueous solution by a 238Pu source is investigated experimentally and theoretically. The time dependence of the nitrous acid yield on dose rate, nitric acid concentration, and nitrate ion concentration is studied. A novel kinetic model for the α-radiolysis of nitric acid aqueous solution is established, by considering the direct and indirect effects. The simulation results agree well with the experimental data, indicating the validity of our model to treat the reaction paths for generation and consumption of nitrous acid. It is shown that the redox reactions involving Pu cannot be neglected in the α-radiolysis of the solution. The results provide a better understanding of the α-ray radiolysis of aqueous nitric acid.
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Acknowledgements
We thank Prof. Yosuke Katsumura (University of Tokyo, Japan) and Dr. Martin Precek (Institute of Physics, Academy of Sciences of the Czech Republic, Prague) for valuable communications and suggestions. We also thank Prof. Chung-King Liu (USTC) and Dr. Han-Qin Weng (USTC) for revising this manuscript.
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This work was partly supported by the National Natural Science Foundation of China (No. 21377122).
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Liu, Z., Fang, Z., Wang, L. et al. Alpha radiolysis of nitric acid aqueous solution irradiated by 238Pu source. NUCL SCI TECH 28, 54 (2017). https://doi.org/10.1007/s41365-017-0200-4
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DOI: https://doi.org/10.1007/s41365-017-0200-4