Recent Developments of OSL Techniques for Dating Quartz and Feldspars

The construction of a unit for measuring optically stimulated luminescence from quartz and fledspar is described. The light sources used for stimulation are infrared diodes for feldspar and green light from a halogen lamp (obtained with a system of filters) for both quartz and feldspar. The unit can be mounted on the Riso TL reader thus allowing combined TL and OSL measurements. The apparatus was used for studies of (1) the relation between TL and OSL signals, (2) the luminescence of quartz samples annealed at different temperatures and (3) anomalous fading of the latent luminescence signal in feldspar.