Afra, B. ; Rodriguez, M. D. ; Trautmann, C. ; Pakarinen, O. H. ; Djurabekova, F. ; Nordlund, K. ; Bierschenk, T. ; Giulian, R. ; Ridgway, M. C. ; Rizza, G. ; Kirby, N. ; Toulemonde, M. ; Kluth, P. (2012)
SAXS investigations of the morphology of swift heavy ion tracks in α-quartz.
In: Journal of Physics: Condensed Matter, 25 (4)
doi: 10.1088/0953-8984/25/4/045006
Article, Bibliographie
Abstract
The morphology of swift heavy ion tracks in crystalline α-quartz was investigated using small angle x-ray scattering (SAXS), molecular dynamics (MD) simulations and transmission electron microscopy. Tracks were generated by irradiation with heavy ions with energies between 27 MeV and 2.2 GeV. The analysis of the SAXS data indicates a density change of the tracks of ~2 ± 1% compared to the surrounding quartz matrix for all irradiation conditions. The track radii only show a weak dependence on the electronic energy loss at values above 17 keV nm−1, in contrast to values previously reported from Rutherford backscattering spectrometry measurements and expectations from the inelastic thermal spike model. The MD simulations are in good agreement at low energy losses, yet predict larger radii than SAXS at high ion energies. The observed discrepancies are discussed with respect to the formation of a defective halo around an amorphous track core, the existence of high stresses and/or the possible presence of a boiling phase in quartz predicted by the inelastic thermal spike model.
| Item Type: | Article |
|---|---|
| Erschienen: | 2012 |
| Creators: | Afra, B. ; Rodriguez, M. D. ; Trautmann, C. ; Pakarinen, O. H. ; Djurabekova, F. ; Nordlund, K. ; Bierschenk, T. ; Giulian, R. ; Ridgway, M. C. ; Rizza, G. ; Kirby, N. ; Toulemonde, M. ; Kluth, P. |
| Type of entry: | Bibliographie |
| Title: | SAXS investigations of the morphology of swift heavy ion tracks in α-quartz |
| Language: | English |
| Date: | 30 January 2012 |
| Publisher: | IOP Publishing |
| Journal or Publication Title: | Journal of Physics: Condensed Matter |
| Volume of the journal: | 25 |
| Issue Number: | 4 |
| DOI: | 10.1088/0953-8984/25/4/045006 |
| Abstract: | The morphology of swift heavy ion tracks in crystalline α-quartz was investigated using small angle x-ray scattering (SAXS), molecular dynamics (MD) simulations and transmission electron microscopy. Tracks were generated by irradiation with heavy ions with energies between 27 MeV and 2.2 GeV. The analysis of the SAXS data indicates a density change of the tracks of ~2 ± 1% compared to the surrounding quartz matrix for all irradiation conditions. The track radii only show a weak dependence on the electronic energy loss at values above 17 keV nm−1, in contrast to values previously reported from Rutherford backscattering spectrometry measurements and expectations from the inelastic thermal spike model. The MD simulations are in good agreement at low energy losses, yet predict larger radii than SAXS at high ion energies. The observed discrepancies are discussed with respect to the formation of a defective halo around an amorphous track core, the existence of high stresses and/or the possible presence of a boiling phase in quartz predicted by the inelastic thermal spike model. |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Ion-Beam-Modified Materials 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences |
| Date Deposited: | 21 Mar 2014 13:01 |
| Last Modified: | 22 Mar 2016 13:31 |
| PPN: | |
| Funders: | PK acknowledges the Australian Research Council for financial support., OP is grateful to the Academy of Finland for financial support. |
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