Результаты исследований: Вклад в журнал › Статья › Рецензирование
Результаты исследований: Вклад в журнал › Статья › Рецензирование
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TY - JOUR
T1 - A first principles investigation of defect energetics and diffusion in actinide dioxides
AU - Singh, Shilpa
AU - Sonvane, Yogesh
AU - Nekrasov, K. A.
AU - Kupryazhkin, A. Ya.
AU - Gajjar, P. N.
AU - Gupta, Sanjeev K.
N1 - SS and SKG thank the Department of Science and Technology (India) and the Russian Foundation for Basic Research (Russia) for the financial support (Grant no.: INT/RUS/RFBR/IDIR/P-6/2016 ). PNG is thankful to the Department of Science and Technology, India for the support under DST-FIST Level-I (No. SR/FST/PSI-097/2006 dated 20th December 2006 and No. SR/FST/PSI-198/2014 dated 21 November 2014) and the University Grants Commission, India for the support under DRS-SAP-I (No. F-530/10/DRS/2010 (SAP-I) dated November 2010 and No.F.530/17/DRS-II/2018 (SAP-I), dated 17th April 2018). AYK and KAN thank the Ministry of Science and Higher Education of the Russian Federation (through the basic part of the government mandate, project No. FEUZ-2023–0013).
PY - 2024
Y1 - 2024
N2 - In this work, we have studied the formation and migration of various neutral intrinsic defects in AnO2. The non-stoichiometric defects such as vacancy defect, interstitial defect, and antisite defect as well as stoichiometric defects such as Schottky defect and Frenkel pairs has been considered for investigation. The formation energies of point defects are much higher in ThO2 as compared to UO2 and PuO2. The binding energy of defect clusters indicate that formation of Frenkel pair and Schottky defect is favorable over individual defects in ThO2. In case of UO2 and PuO2, hyper-stoichiometric defects are more stable than hypo-stoichiometric defects. The results obtained in this work are in good agreement with experimental results. © 2024 Elsevier B.V.
AB - In this work, we have studied the formation and migration of various neutral intrinsic defects in AnO2. The non-stoichiometric defects such as vacancy defect, interstitial defect, and antisite defect as well as stoichiometric defects such as Schottky defect and Frenkel pairs has been considered for investigation. The formation energies of point defects are much higher in ThO2 as compared to UO2 and PuO2. The binding energy of defect clusters indicate that formation of Frenkel pair and Schottky defect is favorable over individual defects in ThO2. In case of UO2 and PuO2, hyper-stoichiometric defects are more stable than hypo-stoichiometric defects. The results obtained in this work are in good agreement with experimental results. © 2024 Elsevier B.V.
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U2 - 10.1016/j.jnucmat.2024.154901
DO - 10.1016/j.jnucmat.2024.154901
M3 - Article
VL - 591
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
M1 - 154901
ER -
ID: 51599228