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Component-resolved bleaching spectra of quartz optically stimulated luminescence; preliminary results and implications for dating



Component-resolved bleaching spectra of quartz optically stimulated luminescence; preliminary results and implications for dating



Radiation Measurements 38(1): 111-118



Bleaching spectra of the ‘fast’ and ‘medium’ optically stimulated luminescence (OSL) components of quartz are reported. A dependence of photoionization cross-section, , on wavelength was observed for the fast and medium components and a significant difference in their responses to stimulation wavelength was found. The ratio of the fast and medium photoionization cross-sections, fast/medium, varied from 30.6 when stimulated with light to 1.4 at . At the fast and medium photoionization cross-sections were found to be sufficiently different that infrared bleaching at raised temperatures allowed the selective removal of the fast component with negligible depletion of the medium. A method for optically separating the OSL components of quartz is suggested, based on the wavelength dependence of photoionization cross-sections.

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Accession: 018597292

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DOI: 10.1016/s1350-4487(03)00250-6


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