On the separation of quartz OSL signal components using different stimulation modes

Jakob Wallinga*, Adrie J.J. Bos, Geoff A.T. Duller

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

20 Citations (Scopus)

Abstract

We investigate both theoretically and experimentally the effect of stimulation mode on the separation of quartz optically stimulated luminescence (OSL) components. We find that, when assuming first-order kinetics with the detrapping probability proportional to stimulation intensity, the OSL signal is a function of the cumulative stimulation energy and not affected by the stimulation mode. This is confirmed by close correspondence between continuous wave (CW), linearly modulated (LM) and hyperbolically modulated (HM) OSL data for some of the samples studied. For other samples the data obtained using LM stimulation differ from that obtained using the other stimulation modes. This may be due to a contribution to the OSL signal from feldspars, or it may indicate that the behaviour of these samples is not adequately described by first-order kinetics. We suggest that CW stimulation is the method of choice for dating purposes as it allows the fastest readout with the greatest signal-to-noise ratio, and because it has a constant background. HM stimulation provides a good alternative when higher resolution is needed for the initial part of the shine-down curve.

Original languageEnglish
Pages (from-to)742-747
Number of pages6
JournalRadiation Measurements
Volume43
Issue number2-6
DOIs
Publication statusPublished - 1 Feb 2008
Externally publishedYes

Keywords

  • First-order kinetics
  • OSL components
  • Quartz
  • Stimulation mode

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