Alpha-irradiation effects in SiO2
- Autor(en)
- Robert Krickl, Lutz Nasdala, Hans J. Götze, Dieter Grambole, Richard Wirth
- Abstrakt
Natural and synthetic cryst. .alpha.-quartz, as well as synthetic SiO2 glass, were irradiated with different doses of 8.8 MeV He2+ ions. The irradn.-induced alteration was characterised using Raman and cathodoluminescence (CL) spectroscopy, optical microscopy, transmission electron microscopy (TEM) and CL and electron microscope imaging. The initially dull bluish-violet CL color of the two .alpha.-quartz samples was found to be transformed to bright yellow in the irradiated areas. The emission max. was obsd. 45 .mu.m below the surface, which corresponds well with correlated helium trajectory lengths and defect d. distribution. Both, total intensity and radial intensity distribution of the CL emission change with the irradn. dose. Observations suggest a nonlinear, approx. logarithmic increase of the CL intensity depending on the alpha dose. Significant broadening of Raman bands is only obsd. near the far end of helium trajectories. This broadening is not only caused by the structural radiation damage but also by strain between strongly and lowly damaged areas.
- Organisation(en)
- Institut für Mineralogie und Kristallographie
- Externe Organisation(en)
- Helmholtz-Zentrum Dresden-Rossendorf, Christian-Albrechts-Universität zu Kiel, Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum
- Journal
- European Journal of Mineralogy: an international journal of mineralogy, geochemistry and related sciences
- Band
- 20
- Seiten
- 517-522
- Anzahl der Seiten
- 6
- ISSN
- 0935-1221
- DOI
- https://doi.org/10.1127/0935-1221/2008/0020-1842
- Publikationsdatum
- 2008
- Peer-reviewed
- Ja
- ÖFOS 2012
- 1030 Physik, Astronomie, 105116 Mineralogie
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/ddb675dd-d31b-41b2-87a7-a6c059eb1a79