Red luminescence from potassium feldspar for dating applications: a study of some properties relevant for dating

摘要: Abstract Aspects of the red thermoluminescence (RTL) and IR (833±5 nm ) stimulated ( λ emission =600– 750 luminescence (orange-red IRSL) potassium feldspar from different origins are described. Anomalous fading RTL (300–500°C) a selection samples was tested. High temperature (300–450°C) exhibits less anomalous in comparison to UV luminescence, for under study. The result supports contention Zink Visocekas (1997) that TL does not fade. It found is bleachable due exposure, relationship between lost orange-red IRSL produced linear. shown around one third trapped charge responsible signal gives rise an signal, indicating some traps centres shared IRSL. Specific characteristics were identified. decay curve by daylight can be described sum three exponential components. Orange-red Short-term storage tests (up 2 weeks) showed no fading. Longer-term (ca. months) do fact indicate fading, though at levels considerably lower than emission. contradictory possibly detection wavelength. As such, it highly likely long-term experiment strongly influenced centred ca. 570 , which while short-term more greatly far 710 shows or