The dependence of quartz OSL on stimulation energy |
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| Affiliation: | 1. Nuclear Research Center Negev, Beersheva, Israel;2. Ben Gurion University of the Negev, Beersheva, Israel;3. Soreq Nuclear Research Center, Yavne 81800, Israel;4. Sami Shamoon College of Engineering, Beersheva 84100, Israel;1. Laboratório de Qumica do Estado Sólido, Departamento de Qumica Fundamental – CCEN, Universidade Federal de Pernambuco, BR 101 s/n, 50670-901, Recife, PE, Brazil;2. Programa de Pós-graduacão em Ciência de Materiais – PPGMTR, CCEN, Universidade Federal de Pernambuco, BR 101 s/n, 50670-901, Recife, PE, Brazil;1. Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan;2. Tokuyama Corp, 1-1 Mikage-cho, Shunan-shi, Yamaguchi 745-8648, Japan;3. Kyusyu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu-shi, Fukuoka 808-0196, Japan;4. Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;1. Département des sciences de la Terre et de l''atmosphère, Université du Québec à Montréal, CP 8888 Succ. Centre-Ville, Montréal, Qc H3C 3P8, Canada;2. IRAMAT-CRP2A, UMR 5060 CNRS – Université de Bordeaux3 – Maison de l’Archéologie, 33607 Pessac, France;1. Energy Engineering Department, Ben Gurion University, Beersheva, Israel;2. Physics Department, Ben Gurion University, Beersheva, Israel;3. Physics Unit, Sami Shamoon College of Engineering, Beersheva, Israel |
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| Abstract: | 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. |
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| Keywords: | Optically stimulated luminescence Optical cross-section Quartz |
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