A comparative study of the luminescence characteristics of polymineral fine grains and coarse-grained K- and Na-rich feldspars

De plateau and its implications for post-IR IRSL dating of polymineral fine grains

“…1a). It clearly shows that the pIRIR signals depleted at much higher temperature than IR 50 signals, which is consistent with the observations of Thomsen et al (2011) and Tsukamoto et al (2012). When comparing the pIRIR intensities with the corresponding IR 50 signals (Fig.…”

WHAT THE BRICKS TELL US FROM A TEMPLE AT BURKHAN KHALDUN MOUNTAINS: CHRONOLOGICAL INSIGHTS FROM pIRIR LUMINESCENCE

“…For the IR 50 there is almost no change in the intensity until the first IR stimulation temperature reached 240 o C. Examination of the pIRIR/IR 50 ratio intensities exhibited an increase from 0.5 to ~2 as the stimulation temperature increased, the pIRIR intensity was higher than the IR 50 signal at ~240 o C. The IR 50 and pIRIR test dose signal intensities are shown in Arrhenius plots in Fig.3c,f; the slope of the plot is interpreted as the activation energy for each signal. For the pIRIR signal the values of 0.19±0.002eV were obtained which were consistent with the value of 0.22±0.025eV reported in [19]. Interestingly, our measurements results shown in Fig.3f The final luminescence ages are derived from the ration of the absorbed radiation dose De and the dose-rate Dr; the data are summarized in Table 4.…”

Age of a prehistoric “Rodedian” cult site constrained by sediment and rock surface luminescence dating techniques

“…Several studies have shown that the infrared stimulated blue signal from feldspars mainly originates from K-rich grains (e.g. Baril and Huntley, 2003;Tsukamoto et al, 2012;Sohbati et al, 2013), and so the same protocol used for K-rich feldspar grains was applied to solid slices (see Table 2). The shape of the IRSL signals from the slices was similar to those of K-rich feldspar grains.…”