Optically stimulated luminescence from quartz measured using the linear modulation technique

Date

2000-12-15

Author

Bulur, Enver
Murray, A.S.

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The optically stimulated luminescence (OSL) from heated natural quartz has been investigated using the linear modulation technique (LMT), in which the excitation light intensity is increased linearly during stimulation. In contrast to conventional stimulation, which usually produces a monotonically decreasing signal, linearly increasing the stimulation power gives peaks in the signal as a function of time. In cases where the OSL signal contains more than one component, the linear increase in power of the stimulation light may result in a curve containing overlapping peaks, where the most easily stimulated component occurs at a shorter time. This allows the separation of the overlapping OSL components, which are assumed to originate from different traps. The LM-OSL curve from quartz shows an initial peak Followed by a broad one. Deconvolution using curve fitting has shown that the composite OSL curve from quartz can be approximated well by using a linear combination of first-order peaks. In addition to the three known components, i.e. fast, medium and slow components from continuous-wave-OSL studies, an additional slow component is also identified for the first time. The dose responses and thermal stabilities of the various components are also studied. (C) 2000 Elsevier Science Ltd. All rights reserved.

Subject Keywords

Optically stimulated luminescence, OSC, Luminescence dating, Quartz, LM-OSL

URI

https://hdl.handle.net/11511/48837

Journal

Radiation Measurements

DOI

https://doi.org/10.1016/s1350-4487(00)00115-3

Collections

Department of Physics, Article

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LM-OSL from single grains of quartz: A preliminary study Bulur, Enver; SOLONGO, S; Bøtter-Jensen, L.; Murray, A.S. (2002-01-01) The recently developed single grain attachment for the Riso TL-OSL reader has been modified to achieve linearly modulated optically stimulated luminescence (LM-OSL). Three different types of luminescence behaviour were observed in 81 quartz grains measured. These types are those showing only the easy-to-bleach component, those with only the hard-to-bleach component, and those exhibiting all components. The results of this preliminary study show that LM-OSL experiments carried out at the single grain level m...
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Infrared (IR) stimulated luminescence from feldspars with linearly increasing excitation light intensity Bulur, Enver (1999-01-01) IR stimulated luminescence signal from potassium and sodium feldspars were studied by linearly increasing the excitation power from zero to a maximum value during the readout. The peak shaped signals observed in both feldspars could be approximated using a linear combination of three first-order components as deduced by curve fitting. The thermal and radiation dose dependent behavior of the IR-stimulated OSL curves were also studied. (C) 1999 Elsevier Science Ltd. All rights reserved.
Simple transformation for converting CW-OSL curves to LM-OSL curves Bulur, Enver (2000-01-01) A simple mathematical transformation is introduced to convert from OSL decay curves obtained in the conventional way to those obtained using a linear modulation technique based on a linear increase of the stimulation light intensity during OSL measurement. The validity of the transformation was tested by the IR-stimulated luminescence curves from feldspars, recorded using both the conventional and the linear modulation techniques. The transformation was further applied to green-light-stimulated OSL from K a...

Citation Formats

E. Bulur and A. S. Murray, “Optically stimulated luminescence from quartz measured using the linear modulation technique,” Radiation Measurements, pp. 407–411, 2000, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48837.