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Measured Displacement Energies of Oxygen Ions in Zirconolite and Rutile

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Abstract

Optical emission spectra in the 300-700 nm range were collected from zirconolite and rutile specimens irradiated with a 3 μs pulsed electron beam using a Febetron 706 variable energy pulsed electronbeam generator. The long-lived emissions (up to microseconds after the electron pulse) consist of broad (halfwidths ~ 100 nm) bands centred around ~400 nm. Over the range 0.2 MeV to 0.6 MeV, the emission intensity per unit dose versus electron beam energy data from the rutile sample showed a single stage dependence on electron beam energy, whereas the zirconolite data suggested a two stage dependence. Rutile has a threshold of 0.23 ½ 0.02 MeV, which gives an E d value of 39 ½ 4 eV for oxygen. Zirconolite has a threshold of 0.26 ½ 0.02 MeV, which gives an E d value of 45 ½4 eV for oxygen. These data are discussed in the context of previously measured and calculated E d values for other oxides.

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Authors and Affiliations

  1. Materials Division, Australian Nuclear Science and Technology Organisation, PMB 1, Menai, NSW, 2234, Australia

    Katherine L. Smith, Michael Colella & Eric R. Vance

  2. Department of Chemistry, University of Melbourne, Parkville, Vic., 3052, Australia

    Ronald Cooper

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  1. Katherine L. Smith
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  2. Ronald Cooper
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  3. Michael Colella
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  4. Eric R. Vance
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Correspondence to Katherine L. Smith.

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Smith, K.L., Cooper, R., Colella, M. et al. Measured Displacement Energies of Oxygen Ions in Zirconolite and Rutile. MRS Online Proceedings Library 663, 373 (2000). https://doi.org/10.1557/PROC-663-373

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