Palomares, Raul I. ; Tracy, Cameron L. ; Neuefeind, Joerg ; Ewing, Rodney C. ; Trautmann, Christina ; Lang, Maik (2017)
Thermal defect annealing of swift heavy ion irradiated ThO 2.
In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 405
doi: 10.1016/j.nimb.2017.05.007
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Isochronal annealing, neutron total scattering, and Raman spectroscopy were used to characterize the structural recovery of polycrystalline ThO2 irradiated with 2-GeV Au ions to a fluence of 1 × 1013 ions/cm2. Neutron diffraction patterns show 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.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Palomares, Raul I. ; Tracy, Cameron L. ; Neuefeind, Joerg ; Ewing, Rodney C. ; Trautmann, Christina ; Lang, Maik |
| Art des Eintrags: | Bibliographie |
| Titel: | Thermal defect annealing of swift heavy ion irradiated ThO 2 |
| Sprache: | Englisch |
| Publikationsjahr: | 15 August 2017 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |
| Jahrgang/Volume einer Zeitschrift: | 405 |
| DOI: | 10.1016/j.nimb.2017.05.007 |
| URL / URN: | https://doi.org/10.1016/j.nimb.2017.05.007 |
| Kurzbeschreibung (Abstract): | Isochronal annealing, neutron total scattering, and Raman spectroscopy were used to characterize the structural recovery of polycrystalline ThO2 irradiated with 2-GeV Au ions to a fluence of 1 × 1013 ions/cm2. Neutron diffraction patterns show 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. |
| Freie Schlagworte: | ThO2, Swift heavy Ions, Defects, Neutron total scattering, Raman spectroscopy, Annealing |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Ionenstrahlmodifizierte Materialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 29 Dez 2017 09:47 |
| Letzte Änderung: | 29 Dez 2017 09:47 |
| PPN: | |
| Sponsoren: | This research is funded by the Office of Basic Energy Sciences of the U.S. Department of Energy as part of the Materials Science of Actinides Energy Frontier Research Center (DE-SC0001089)., The research at ORNL’s Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy., R.I.P. gratefully acknowledges support from the U.S. Department of Energy (DOE) National Nuclear Security Administration (NNSA) through the Carnegie DOE Alliance Center (CDAC) under Grant number DE-NA-0002006. |
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