The dependence of quartz OSL on stimulation energy

• Published in: Radiation measurements Vol. 71; pp. 108 - 112
• Main Authors: Kijek, N., Chruścińska, A., Przegiętka, K.R.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Kidlington Elsevier Ltd 01.12.2014; Elsevier
• Subjects: Cross sections; Dating; Earth sciences; Earth, ocean, space; Exact sciences and technology; Geochronology; Isotope geochemistry. Geochronology; Luminescence; Mathematical models; Optical cross-section; Optically stimulated luminescence; Quartz; Sediments; Stimulation; Vibration; Wavelengths; Optical cross-section; Quartz; Optically stimulated luminescence; experimental studies; wavelength; models; cross sections; crystals; detection; OSL; quartz; solar radiation; vibration; traps; luminescence; lattice; temperature; silicates; dating; framework silicates; energy
• ISSN: 1350-4487; 1879-0925
• DOI: 10.1016/j.radmeas.2014.03.010

Quartz is the mineral most commonly used for sediment dating. In dating practice, the optically stimulated luminescence (OSL) of quartz is measured mainly using the stimulation light whose wavelength is 470 ± 30 nm. The parameters of traps active in the OSL process are also determined for this stimulation band. The zeroing of the OSL is the fundamental condition of applicability of the luminescence dating for specific sediment and takes place in sunlight whose spectrum differs significantly from the band 470 ± 30 nm. In order to be able to know the course of OSL process in nature, a wider knowledge of the dependency of the trap parameters on the stimulation band is needed. Here the results are presented for the OSL measurements carried out with different wavelengths of stimulation light. For each stimulation band the components of the OSL signal are determined by the fitting procedure, and in this way the wavelength dependence of an individual component is found. The experiment has been repeated for two temperatures of OSL detection – the room temperature, which corresponds to natural conditions, and for 125 °C, which is the temperature usually applied for OSL measurement in dating. Four OSL components are presented in both experimental series. The values of their optical cross-section changes along with stimulation energy and temperature, as it is predicted by the model of OSL process including crystal lattice vibrations. •Study of the optical cross-section (OSC) values for the components of OSL in quartz.•The measurements for various stimulation energies and two temperatures are presented.•Predictions of the OSL model including the crystal lattice vibrations are confirmed.