Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermal recovery of colour centres induced in cubic yttria-stabilized
  zirconia by charged particle irradiations   We have used electron paramagnetic resonance to study the thermal annealing
of colour centres induced in cubic yttria-stabilized zirconia by swift electron
and heavy ion-irradiations. Single crystals were irradiated with 1 or 2-MeV
electrons, and 200-MeV 127I, or 200-MeV 197Au ions. Electron and ion beams
produce the same colour centres: namely i) an F+-like centre, ii) the so-called
T-centre (Zr3+ in a trigonal oxygen local environment), and iii) a hole center.
Isochronal annealing was performed up to 973 K. Isothermal annealing was
performed at various temperatures on samples irradiated with 2-MeV electrons.
The stability of paramagnetic centres increases with fluence and with a TCR
treatment at 1373 K under vacuum prior to the irradiations. Two distinct
recovery processes are observed depending on fluence and/or thermal treatment.
The single-stage type I process occurs for F+-like centres at low fluences in
as-received samples, and is probably linked to electron-hole recombination.
T-centres are also annealed according to a single-stage process regardless of
fluence. The annealing curves allow one to obtain activation energies for
recovery. The two-stage type II process is observed only for the F+-like
centres in as-received samples, at higher fluences, or in reduced samples.
These centres are first annealed in a first stage below 550 K, like in type I,
then transform into new paramagnetic centres in a second stage above 550 K. A
simple kinetics model is proposed for this process. Complete colour centre
bleaching is achieved at about 1000 K.

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The categories of this paper are: alg-geom
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: cmp-lg
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The categories of this paper are: comp-gas
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph
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The categories of this paper are: nlin
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The categories of this paper are: math
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The categories of this paper are: dg-ga
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The categories of this paper are: ao-sci