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Title: In situ defect annealing of swift heavy ion irradiated CeO 2 and ThO 2 using synchrotron X-ray diffraction and a hydrothermal diamond anvil cell

Journal Article · · Journal of Applied Crystallography (Online)
 [1];  [2];  [2];  [3];  [3];  [4];  [5];  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Univ. of Michigan, Ann Arbor, MI (United States)
  3. Carnegie Inst. of Washington, Argonne, IL (United States). Geophysical Lab.
  4. Technische Univ. Darmstadt (Germany); GSI-Darmstadt (Germany)
  5. Stanford Univ., CA (United States)

Hydrothermal diamond anvil cells (HDACs) provide facile means for coupling synchrotron Xray techniques with pressure up to 10 GPa and temperature up to 1300 K. This manuscript reports on an application of the HDAC as an ambient-pressure sample environment for performing in situ defect annealing and thermal expansion studies of swift heavy ion irradiated CeO2 and ThO2 using synchrotron X-ray diffraction. The advantages of the in situ HDAC technique over conventional annealing methods include: rapid temperature ramping and quench times, high-resolution measurement capability, simultaneous annealing of multiple samples, and prolonged temperature- and apparatus stability at high temperatures. Isochronal annealing between 300 K and 1100 K revealed 2-stage and 1-stage defect recovery processes for irradiated CeO2 and ThO2, respectively; indicating that the morphology of the defects produced by swift heavy ion irradiation of these two materials differs significantly. These results suggest that electronic configuration plays a major role in both the radiation-induced defect production and high temperature defect recovery mechanisms of CeO2 and ThO2.

Research Organization:
Carnegie Inst. of Science, Argonne, IL (United States); Energy Frontier Research Centers (EFRC) (United States). Materials Science of Actinides (MSA)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
NA0002006; SC0001089
OSTI ID:
1338330
Journal Information:
Journal of Applied Crystallography (Online), Vol. 48, Issue 3; ISSN 1600-5767
Publisher:
International Union of CrystallographyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 19 works
Citation information provided by
Web of Science

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Cited By (3)

Defects induced in cerium dioxide single crystals by electron irradiation journal January 2018
Thermal transport across nanoscale damage profile in sapphire irradiated by swift heavy ions journal January 2020
Impact of irradiation induced dislocation loops on thermal conductivity in ceramics journal June 2019

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