Trapping and emission centres in X-irradiated natural zircon. characterization by thermoluminescence |
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| Authors: | P Iacconi R Caruba |
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| Institution: | 1. Laboratoire de Physique Expérimentale, Université de Nice Parc Valrose, 06034, Nice Cedex, France
2. Laboratoire de Géologie-Géochimie, Université de Nice E.R.A. C.N.R.S. 888, Parc Valrose, 06034, Nice Cedex, France
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| Abstract: | In this paper, by the systematic compilation of results obtained with a series of natural zircons of various origins, we show that the thermoluminescence (TL) of natural zircons is characterized by two main peaks at 155±4 and 378±7 K. Other peaks are observed at 97±1, 219±3, 240±3, 267±6, 301±6, 343±5, 458±10, 518±4, and 556±7 K. Three kinds of emission are principally observed: 1) a 380–400 nm band; 2) a series of maxima located at 480, 580, 662 and 760 nm; 3) a 285 nm band. The comparison of these results with those obtained under similar conditions from synthetic zircons permits us to extend the interpretation of mechanisms involved in synthetic zircon TL to trapping and emission centres of natural zircons. In particular, we show that the three emissions above are due to 1) a host lattice mechanism, 2) Dy3+, 3) OH? groups, respectively. |
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