Spectra luminescence characterization of metamictization in a Brazilian zircon megacryst

Correcher, V.; García-Guinea, Javier; Robredo, L. M.; Sánchez-Muñoz, L.

doi:10.1016/j.radmeas.2007.10.041

Cited by 4 publications

(1 citation statement)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lumines cence of zircon is rather effective in petrology: genesis of the mineral, its thermal stability, and radiation his tory affect its glow. Numerous studies are concerned with zircon luminescence induced by different types of excitation: cathode (Hanchar, Rudnic, 1995 (Tarashchan, 1978; Votya kov et al, 1986), X ray (Krasnobaev et al, 1988), laser (Gaft et al, 2002), ionic (Correcher et al, 2007), and thermal (Kirsh, Townsend, 1987;Krasnobaev et al, 1988;Laruhin et al, 2002). Well grounded simulation of glow centers in zircon requires, however, the exam ination of both intra and interband electron pro cesses.…”

Section: Introductionmentioning

confidence: 99%

Synchrotron-excited luminescence of natural zircon

Shchapova

Votyakov

Ivanov³

et al. 2010

Geol. Ore Deposits

View full text Add to dashboard Cite

Abstract-The luminescence properties of two single zircon crystals from kimberlite of Yakutia have been studied, excited by the DORIS HASYLAB synchrotron, Germany, within energy range from the visible to the soft X ray region (5-25, 50-200, and 500-620 eV) at temperatures of 300 and 10 K. The luminescence spec tra in the range of 2.5 to 6.0 eV and excitation spectra of the main bands have been examined, the physical nature of the luminescence centers has been discussed, and the luminescence properties of a crystal contain ing growth (radiation) structural defects and a crystal with the same impurities but annealed in air at 1200°C are compared. The zoned structure of the mineral has been considered and the value of the energy gap (E g ) in the mineral has been estimated at 7.1 eV. Two groups of luminescence bands caused by impurities of intrin sic (growth, radiation) nature (E max = 2.1, 2.7-2.8, and 3.2-3.3 eV) and matrix luminescence (E max = 4.4-4.7 and 5.4 eV) probably with the participation of excitons were distinguished on the basis of selective excita tion of zircon with different synchrotron energies relative to the gap value (E excit < E g , E excit ~ E g , and E excit ӷ E g ). The short lived component with a response time of 4 ns has been revealed in the afterglow of zircon in the region of 5.4 eV.

show abstract