Optically stimulated luminescence characteristics of natural and doped quartz and alkali feldspars

Natural alkali feldspars and quartz were doped by T1 and Cu by thermodiffus ion and electrodiffusion technology. As a result of doping, intensive UV em ission bands were created, The OSL stimulation spectra of irradiated natura l and doped quartz and alkali feldspars were measured in the span of 400-13 00 nm using UV emission of T1 at 280 nm and of Cu at 350 nm. One-trap centr e conception was confirmed for high-temperature palaeodosimetrical TL peaks and OSL stimulation spectrum bands: for alkali feldspars at 880 and 420 nm and visible region of the spectrum for quartz. A thermooptical mechanism o f the optical depopulation of the corresponding trap is confirmed in alkali feldspars, but there is no evidence for processes of this kind in quartz. An analogy between the physical background of OSL properties of both minera ls is discussed. (C) 1999 Elsevier Science Ltd. All rights reserved.