Thermal defect annealing of swift heavy ion irradiated ThO2
Journal Article
·
· Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Nuclear Engineering
- Stanford Univ., CA (United States). Dept. of Geological Sciences
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS), Chemical and Engineering Materials Division
- GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany); Technische Univ. Darmstadt (Germany)
Neutron total scattering and Raman spectroscopy were used to characterize the structural recovery of irradiated polycrystalline ThO2 (2.2 GeV Au, = 1 x 1013 ions/cm2) during isochronal annealing. Here, neutron diffraction patterns showed that the Bragg signal-to-noise ratio increases and the unit cell parameter decreases as a function of isochronal annealing temperature, with the latter reaching its pre-irradiation value by 750 °C. Diffuse neutron scattering and Raman spectroscopy measurements indicate that an isochronal annealing event occurs between 275$$-$$425 °C. This feature is attributed to the annihilation of oxygen point defects and small oxygen defect clusters.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); 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:
- AC05-00OR22725; NA0002006; SC0001089; NA-0002006
- OSTI ID:
- 1364316
- Alternate ID(s):
- OSTI ID: 1397664
- Journal Information:
- Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 405, Issue C; ISSN 0168-583X
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 5 works
Citation information provided by
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