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Effect of orientation on ion track formation in apatite and zircon

Li, W. ; Kluth, P. ; Schauries, D. ; Rodriguez, M. D. ; Lang, M. ; Zhang, F. ; Zdorovets, M. ; Trautmann, C. ; Ewing, R. C. (2014)
Effect of orientation on ion track formation in apatite and zircon.
In: American Mineralogist, 99 (5-6)
doi: 10.2138/am.2014.4669
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

Fission track (FT) thermochornology is essentially based on empirical fits to annealing data of FTs revealed by chemical etching, because, until now, unetched, latent FTs could not be examined analytically at the atomic-scale. The major challenge to such an analysis has been the random orientation of FTs and their extremely small diameters. Here we use high-energy ions (2.2 GeV Au or 80 MeV Xe) to simulate FT formation along specific crystallographic orientations. By combining results from transmission electron microscopy (TEM) of single tracks and small-angle X-ray scattering (SAXS) for millions of tracks, a precise picture of track morphology as a function of orientation is obtained. High-resolution analysis reveals that orientation affects the shape of tracks in apatite and zircon through the preferential creation of damage along directions with highest atomic density. However, track radius does not depend on orientation, contradicting previous reports. Independent of track orientation, track radii, as measured at each point along the entire length of 80 MeV Xe ion tracks in apatite, can be understood using the thermal spike model of Szenes. Thus, the well-known track annealing anisotropy of apatite is not due to track radius anisotropy. The combination of ion-irradiations with TEM and SAXS analysis provides a unique opportunity to understand and model track formation and annealing under various geologic conditions.

Typ des Eintrags: Artikel
Erschienen: 2014
Autor(en): Li, W. ; Kluth, P. ; Schauries, D. ; Rodriguez, M. D. ; Lang, M. ; Zhang, F. ; Zdorovets, M. ; Trautmann, C. ; Ewing, R. C.
Art des Eintrags: Bibliographie
Titel: Effect of orientation on ion track formation in apatite and zircon
Sprache: Englisch
Publikationsjahr: Mai 2014
Verlag: MINERALOGICAL SOC AMER
Titel der Zeitschrift, Zeitung oder Schriftenreihe: American Mineralogist
Jahrgang/Volume einer Zeitschrift: 99
(Heft-)Nummer: 5-6
DOI: 10.2138/am.2014.4669
Kurzbeschreibung (Abstract):

Fission track (FT) thermochornology is essentially based on empirical fits to annealing data of FTs revealed by chemical etching, because, until now, unetched, latent FTs could not be examined analytically at the atomic-scale. The major challenge to such an analysis has been the random orientation of FTs and their extremely small diameters. Here we use high-energy ions (2.2 GeV Au or 80 MeV Xe) to simulate FT formation along specific crystallographic orientations. By combining results from transmission electron microscopy (TEM) of single tracks and small-angle X-ray scattering (SAXS) for millions of tracks, a precise picture of track morphology as a function of orientation is obtained. High-resolution analysis reveals that orientation affects the shape of tracks in apatite and zircon through the preferential creation of damage along directions with highest atomic density. However, track radius does not depend on orientation, contradicting previous reports. Independent of track orientation, track radii, as measured at each point along the entire length of 80 MeV Xe ion tracks in apatite, can be understood using the thermal spike model of Szenes. Thus, the well-known track annealing anisotropy of apatite is not due to track radius anisotropy. The combination of ion-irradiations with TEM and SAXS analysis provides a unique opportunity to understand and model track formation and annealing under various geologic conditions.

Freie Schlagworte: Ion tracks, fission tracks, apatite, zircon, orientation effects, thermal spike, TEM, SAXS
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: 09 Jan 2015 13:27
Letzte Änderung: 09 Jan 2015 13:27
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