1. bookVolume 34 (2009): Issue -1 (December 2009)
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eISSN
1897-1695
ISSN
1733-8387
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04 Jul 2007
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1 time per year
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English
access type Open Access

The Effect of Thermal Stimulation on the Far-Red and Orange-Red IRSL Signal of a French K-Rich Feldspar: Preliminary Results

Published Online: 06 Jan 2010
Volume & Issue: Volume 34 (2009) - Issue -1 (December 2009)
Page range: 15 - 24
Journal Details
License
Format
Journal
eISSN
1897-1695
ISSN
1733-8387
First Published
04 Jul 2007
Publication timeframe
1 time per year
Languages
English
The Effect of Thermal Stimulation on the Far-Red and Orange-Red IRSL Signal of a French K-Rich Feldspar: Preliminary Results

Feldspar suffers from anomalous fading. Previous studies suggest that the level of fading depends on the emission band, and that the fading decreases by increasing the emission wavelengths; therefore, it is interesting to compare blue, orange and far-red IRSL emission characteristics. The purpose of this article is to make an initial consideration of some physical differences between two close emission windows. The effect of the sample temperature on far-red (λ>650 nm) and orangenear-red IRSL (λ=600-650 nm) from an identical feldspar sample is investigated. The difference in signal decay rate and thermal effects is discussed. While there is signal enhancement for far-red IRSL signals between 100-220°C, orange-near-red signals do not change. Some possible mechanisms for producing far-red and orange-near-red IRSL are discussed. This paper shows that orange-near-red IRSL and far-red IRSL thermal activation energies are different. This difference may be the cause of previously observed differences in stability of near and far-red IRSL signals.

Keywords

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