We have 7 automated Risö readers for dating sediments; 2 TL/OSL-DA-15, one with single grain attachment, and 5 TL/OSL-DA-20; 4 of which are equipped with a pulsed OSL attachment (one also with a photon timer, and one with radioluminescence and Xray-fluorescence) and the other with a stand-alone pulsing box. Another dating system is 1 lexsyg-smart from Freiberg Instruments.
Quartz samples are stimulated with blue LEDs emitting at 470 nm, and OSL signals are detected through a UV filter (between 280 and 380 nm). Feldspar samples are stimulated with IR LEDs emitting at 870 nm, and IRSL signals are detected through a combination of blue filters (between 380 and 460 nm).
Quartz is used to date young sediments ranging from a few years to ~100 000 years. Feldspar is mainly used for dating older sediments up to ~ 300 000 years old.
Rate of soil Formation in Arenosols of dunes on Spikeroog Island (Germany). - Geoderma Regional 20, e00246. Doi: 10.1016/j.geodrs.2019.e00246.
2020, POLLMANN, T., TSUKAMOTO, S., FRECHEN, M. & GIANI, L.
Timing and development of sand dunes in the Golestan Province, northern Iran Implications for the Late-Pleistocene history of the Caspian Sea. - Journal of Aeolian Research, 41.
2019, RAHIMZADEH, N., KHORMALI, F., GRIBENSKI, N., TSUKAMOTO, S., KEHL, M., PINT, A., KIANI, F. & FRECHEN, M.
Testing the reliability of fading correction methods for feldspar IRSL dating: A comparison between natural and simulated-natural dose response curves. - Radiation Measurements, 120: 228-233.
2019, LI, Y., TSUKAMOTO, S., LONG, H., ZHANG, J., YANG, L., HE, Z. & FRECHEN, M.
Timing of fluvial sedimentation in the Upper Rhine Graben since the Middle Pleistocene: Constraints from quartz and feldspar luminescence dating. - Boreas, 47 (1): 256-270.
2018, LI, Y., TSUKAMOTO, S., FRECHEN, M. & GABRIEL, G.
Pulsed IRSL: A stable and fast bleaching luminescence signal from feldspar for dating Quaternary sediments. - Quaternary Geochronology, 41: 26-36.
2017, TSUKAMOTO, S., KONDO, R., LAUER, T., & JAIN, M.