Journal ArticleDOI
Trapping and emission centres in X-irradiated zircon. II. Contribution of the SiO44− groups
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TLDR
In this paper, it was established that a paramagnetic trap centre is associated with most TL peaks in the thermoluminescence of undoped zircons, synthesized with the methode hydrothermal method, and which are X-irradiated at 77 K.Abstract:
The 365 nm emission band observed at 100, 165, 205, 260, and 325 K in the thermoluminescence of undoped zircons, synthesized with the hydrothermal method, and which are X-irradiated at 77 K, is attributed to the SiO lattice groups. It is established that a paramagnetic trap centre is associated to most TL peaks. These traps are fairly well described by the Curie model: an electron is trapped in the field of two positive charges, one substituted to silicon, the other to a neighbouring oxygen.
La bande d'emission situee autour de 365 nm et apparaissant a 100, 165, 205, 260 et 325 K dans la thermoluminescence de zircons non dopes, synthetises par la methode hydrothermale, et ayant subi une irradiation X a 77 K, est attribuee aux groupements du reseau SiO. Il est montre qu'a un pic de thermoluminescence est en general associe un centre de piegeage paramagnetique, et que ces derniers sont assez bien representes par le modele de Curie: un electron est piege dans le champ de deux charges positives, l'une substituee a un silicium, l'autre a un oxygene voisin.read more
Citations
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Journal ArticleDOI
Spectroscopic methods applied to zircon
TL;DR: A number of spectroscopic techniques have been used to study the properties of natural and synthetic (pure and doped) zircon (ZrSiO4) as mentioned in this paper.
Journal Article
Cathodoluminescence applied to the microcharacterization of mineral materials : a present status in experimentation and interpretation
TL;DR: Experimentation and interpretation of cathodoluminescence (CL) microscopy and spectroscopy applied to the microcharacterization of material minerals are reviewed in this paper, in terms of the development of bulk charging, production of heat, diffusion of impurities, and creation of lattice defects induced by the incident ionizing particles.
Journal ArticleDOI
Cathodoluminescence of natural zircons
B Yang,B J Luff,P D Townsend +2 more
TL;DR: In this paper, a broad-band feature at 385 nm is noted, in common with other luminescence studies using different forms of excitation, and is attributed to an intrinsic decay process.
Journal ArticleDOI
Electron and hole centres produced in zircon by X-irradiation at room temperature
Yoram Kirsh,P.D. Townsend +1 more
TL;DR: In this article, the effect of X-rays in zircon (ZrSiO4) single crystals was studied by analysing the kinetics and spectrum of the thermoluminescence between 20 degrees and 420 degrees C.
Journal ArticleDOI
High resolution cathodoluminescence combined with SHRIMP ion probe measurements of detrital zircons
TL;DR: In this article, detrital zircons from the Cretaceous Weferlingen quartz sand (Germany) were used to distinguish and characterize different zircon populations, including weakly zoned, rounded grains with relict cores, well rounded fragments of optically more or less homogeneous ZIRcon grains showing CL zoning predominantly parallel to the z-axis, and idiomorphic to slightly rounded Zircon grains typically showing euhedral CL zoning.
References
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Journal ArticleDOI
The Electron Trap Mechanism of Luminescence in Sulphide and Silicate Phosphors
G F J Garlick,A F Gibson +1 more
TL;DR: Theoretical and experimental studies attempt to determine the extent to which retrapping does occur and what effects it will have in modifying the phosphorescence and thermoluminescence characteristics.
Journal ArticleDOI
Electronic structure of E 1 ′ centers in Si O 2
Kwok Leung Yip,W. Beall Fowler +1 more
TL;DR: In this article, a linear combination of localized orbitals-molecular orbital (LCLO-MO) cluster method is applied to calculate the electronic structure of ${{E}_{1}}^{\ensuremath{'}}$ centers in the $-quartz structure of Si${\mathrm{O}}_{2}$.
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Traps and emission centres in thermoluminescent ZrO2
TL;DR: The thermoluminescence (TL) of heated amorphous ZrO2, doped by Ti, Th, U, Nb, Dy, excited by 253.7 nm or X-radiation is investigated in this paper.
Journal ArticleDOI
Trapping and emission centres in X-irradiated zircon. I. Contribution of the OH- ion
TL;DR: In this article, it was shown that X-irradiation can dissociate OH− groups into O− and H0, and suggested that dissociation into OH and e− also occurs.
Journal ArticleDOI
Modèles pour les divers types de pièges dans le sulfure de zinc phosphorescent. libération thermique et optique des électrons piégés
TL;DR: HAL as discussed by the authors is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not, which may come from teaching and research institutions in France or abroad, or from public or private research centers.
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