TDPAC study of structural disorder in metamict zircon

Herbert Jaeger, Laith Aburaddad, David J. Wick

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Time-differential perturbed angular correlation spectroscopy (TDPAC) was used to characterize the electric field gradient of zircon in the metamict and partially recrystallized state. TDPAC spectra were recorded of various samples originating from Australia using 181Ta probe nuclei. The disorder of the metamict state is reflected by broadening of the TDPAC spectral lines. Spectra recorded of samples as received show linewidths as high as 12%. No significant change in the linewidths was observed after isochronal annealing between 200 and 600°C. Annealing above 600°C reduces the spectral linewidths, indicating the beginning of an ordering process. The annealing temperature required to result in a specific linewidth was found to be correlated with the samples' U and Th impurity concentrations. Calculations based on a simple point charge model are used to relate TDPAC linewidths to random displacements of atoms in the structure of zircon in the metamict and the partially annealed state.

Original languageEnglish
Pages (from-to)1083-1089
Number of pages7
JournalApplied Radiation and Isotopes
Volume48
Issue number8
DOIs
Publication statusPublished - Aug 1997
Externally publishedYes

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angular correlation
disorders
spectroscopy
annealing
line spectra
impurities
gradients
nuclei
electric fields
probes
atoms
temperature

ASJC Scopus subject areas

  • Radiation

Cite this

TDPAC study of structural disorder in metamict zircon. / Jaeger, Herbert; Aburaddad, Laith; Wick, David J.

In: Applied Radiation and Isotopes, Vol. 48, No. 8, 08.1997, p. 1083-1089.

Research output: Contribution to journalArticle

Jaeger, Herbert ; Aburaddad, Laith ; Wick, David J. / TDPAC study of structural disorder in metamict zircon. In: Applied Radiation and Isotopes. 1997 ; Vol. 48, No. 8. pp. 1083-1089.
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