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Understanding the R...
Understanding the Reasons for Variations in Luminescence Sensitivity of Natural Quartz Using Spectroscopic and Chemical Studies
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- Sharma, Suchinder, 1982 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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Chawla, Santa (författare)
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Sastry, M. D. (författare)
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Gaonkar, Mahesh (författare)
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Mane, Sandesh (författare)
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Balaram, V. (författare)
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Singhvi, Ashok K. (författare)
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(creator_code:org_t)
- 2017-05-01
- 2017
- Engelska.
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Ingår i: Proceedings of the Indian National Science Academy. - : Indian National Science Academy. - 0370-0046. ; 83:3, s. 645-653
- Relaterad länk:
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http://dx.doi.org/10...
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https://doi.org/10.1...
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- Natural quartz from diverse provenances exhibit variations in their luminescence sensitivity (photon flux/mg.Gy) that span over ten orders of magnitude. A range of factors (such as crystallization/recrystallization process, irradiation, thermal and optical history) that modify luminescence sensitivity have been considered to explain such differences in luminescence sensitivity. However, a clearly definable/identifiable reason is still awaited; such as, these large variations in luminescence sensitivity are related to commonly occurring luminescence quenchers/enhancers in natural quartz lattice. Towards this, quartz mineral grains extracts from different provenances and from varied depositional environments were examined spectroscopically using Fourier Transform infra-red spectroscopy (FTIR), optically stimulated luminescence (OSL), photoluminescence (PL), time resolved PL (TRPL) decay, thermoluminescence (TL) and the trace element analysis. The present study exhibited an anti-correlation between OSL sensitivity and water content in quartz (estimated through integrated intensity of normalized FTIR signal in the wave number region 3000-3600 cm(-1)), such that a sensitivity change of over 5 orders of magnitude corresponded to a change in integrated water absorption signal by 5 times, but in opposite direction. PL and TRPL results enabled further insights.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- defects
- crystalline quartz
- age-dependence
- temperatures
- osl
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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