Modeling the charge deposition in quartz grains during natural irradiation and its influence on the optically stimulated luminescence signal

L. Baly*, I. Quesada, A. S. Murray, G. Martin, P. Espen, R. Arteche, M. Jain

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The rate of charge deposition in quartz grains irradiated in natural conditions is computed by radiation transport modeling. Quartz luminescence models are modified with the addition of the resulting charge deposition term, and the influence of this process on the optically stimulated luminescence (OSL) signal is analyzed. The results indicate that the charge deposition occurring in the quartz grain during the time of residence within rock could lead to the depletion of trapped holes in the recombination centres. For the two different quartz models investigated here, complete depletion is expected to occur for rock ages between 500 Ma and 1100 Ma. It is predicted that for sedimentary quartz derived from such rocks, the OSL signal is dominated by the slow component. It was also found that the shape and saturation level of the natural sensitivity-corrected dose response curve (DRC) of quartz is affected by the charge deposition; specifically, a linear reduction of the saturation level with the age of the rock is observed.

Original languageEnglish
Article number106564
JournalRadiation Measurements
Volume142
ISSN1350-4487
DOIs
Publication statusPublished - 2021

Keywords

  • Luminiscence dating
  • Monte Carlo simulation
  • Quartz

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