The role of opacifiers in the luminescence of mosaic glass: Characterization of the optical properties of cassiterite (SnO2)

Gallí, Anna; Martini, M.; Sibilia, Emanuela; Fumagalli, Franco

doi:10.1016/j.radmeas.2012.02.004

Cited by 6 publications

(3 citation statements)

References 15 publications

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“…Exposure to light is known to possibly deplete the population of high‐temperature peaks in silica and glass (Galli et al. ). It is a known fact that illuminating irradiated quartz with blue and green light results in charge transfer from deeper to shallower TL traps (Wintle and Murray ).…”

Section: Methodsmentioning

confidence: 99%

“…No sample showed a significant reduction of the signal; the TL intensities before and after storage were in the AE5% dispersion interval. Exposure to light is known to possibly deplete the population of high-temperature peaks in silica and glass (Galli et al 2012). It is a known fact that illuminating irradiated quartz with blue and green light results in charge transfer from deeper to shallower TL traps (Wintle and Murray 1997).…”

Section: Anomalous Fading Testmentioning

confidence: 99%

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Thermoluminescence dating of the Kamil impact crater (Egypt)

Sighinolfi

Sibilia

Contini

et al. 2015

Meteorit & Planetary Scien

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Thermoluminescence (TL) dating has been used to determine the age of the meteorite impact crater at Gebel Kamil (Egyptian Sahara). Previous studies suggested that the 45 m diameter structure was produced by a fall in recent times (less than 5000 years ago) of an iron meteorite impactor into quartz‐arenites and siltstones belonging to the Lower Cretaceous Gilf Kebir Formation. The impact caused the complete fragmentation of the impactor, and the formation of a variety of impactites (e.g., partially vitrified dark and light materials) present as ejecta within the crater and in the surrounding area. After a series of tests to evaluate the TL properties of different materials including shocked intra‐crater target rocks and different types of ejecta, we selected a suite of light‐colored ejecta that showed evidence of strong thermal shock effects (e.g., partial vitrification and the presence of high‐temperature and ‐pressure silica phases). The abundance of quartz in the target rocks, including the vitrified impactites, allowed TL dating to be undertaken. The variability of radioactivity of the intracrateric target rocks and the lack of direct in situ dosimetric evaluations prevented precise dating; it was, however, possible to constrain the impact in the 2000 BC–500 AD range. If, as we believe, the radioactivity measured in the fallback deposits is a reliable estimate of the mean radioactivity of the site, the narrower range 1600–400 BC (at the 2σ confidence level) can be realistically proposed.

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Section: Methodsmentioning

confidence: 99%

Section: Anomalous Fading Testmentioning

confidence: 99%

Thermoluminescence dating of the Kamil impact crater (Egypt)

Sighinolfi

Sibilia

Contini

et al. 2015

Meteorit & Planetary Scien

View full text Add to dashboard Cite

show abstract

“…In high defective or, especially, amorphous and/or vitreous materials, the trap depths associated with particular defects will be spread over a range of values, so the activation energies tend to be distributed, rather than discrete [19][20][21]. Therefore, in the case of an amorphous material, one refers to the mobility gap within which a finite density of states localized near the Fermi level can exist.…”

Section: Tl Characterizationmentioning

confidence: 99%