Academic Journal
Study of phonons in irradiated epitaxial thin films of UO2
| العنوان: | Study of phonons in irradiated epitaxial thin films of UO2 |
|---|---|
| المؤلفون: | Rennie, Sophie, Lawrence Bright, Eleanor, Darnbrough, James, Paolasini, Luigi, Bosak, Alexei, Smith, Andrew, Mason, Nick, Lander, Gerard, Springell, Ross |
| المصدر: | Rennie , S , Lawrence Bright , E , Darnbrough , J , Paolasini , L , Bosak , A , Smith , A , Mason , N , Lander , G & Springell , R 2018 , ' Study of phonons in irradiated epitaxial thin films of UO2 ' , Physical Review B , vol. 97 , no. 22 , 224303 . https://doi.org/10.1103/PhysRevB.97.224303 |
| سنة النشر: | 2018 |
| المجموعة: | University of Bristol: Bristol Reserach |
| مصطلحات موضوعية: | Phonons, UO2, Irradiation damage, Thermal Conductivity |
| الوصف: | We report experiments to determine the effect of radiation damage on the phonon spectra of the most common nuclear fuel, UO2. We irradiated thin (∼300 nm) epitaxial films of UO2 with 2.1 MeV He2+ ions to 0.15 displacements per atom and a lattice swelling of Δa/a∼0.6% and then used grazing-incidence inelastic x-ray scattering to measure the phonon spectrum. We succeeded in observing the acoustic modes, both transverse and longitudinal, across the Brillouin zone. The phonon energies, in both the pristine and irradiated samples, are unchanged from those observed in bulk material. On the other hand, the phonon linewidths (inversely proportional to the phonon lifetimes) show a significant broadening when comparing the pristine and irradiated samples. This effect is shown to increase with phonon energy across the Brillouin zone. The decreases in the phonon lifetimes of the acoustic modes are roughly consistent with a 50% reduction in the thermal conductivity. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | https://research-information.bris.ac.uk/en/publications/dc3963aa-53c0-42de-83df-fc81f99f99ca |
| DOI: | 10.1103/PhysRevB.97.224303 |
| الاتاحة: | https://hdl.handle.net/1983/dc3963aa-53c0-42de-83df-fc81f99f99ca https://research-information.bris.ac.uk/en/publications/dc3963aa-53c0-42de-83df-fc81f99f99ca https://doi.org/10.1103/PhysRevB.97.224303 https://research-information.bris.ac.uk/ws/files/161775738/Full_text_PDF_final_published_version_.pdf http://www.scopus.com/inward/record.url?scp=85048374716&partnerID=8YFLogxK |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.A28CB818 |
| قاعدة البيانات: | BASE |
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