Variability of infrared stimulated luminescence properties from fractured feldspar grains

A series of OSL properties of fragments from split feldspar grains have been investigated. These are (1) the response to a radiation dose, (2) the recycling of corrected induced luminescence (L-i/T-i), (3) the corrected natural luminescence (L-N/T-N), (4) the corrected thermal transfer luminescence (termed herein L-tt/T-tt) and, (5) the rate of anomalous fading (g). It was found that the parameters of different parts of the same grain are the same. The relative uncertainty, at the 2 sigma level, at which we can claim that the measured parameters are correlated, is generally less than 5% but is ca 40% for the anomalous fading rate due to measurement uncertainty. For young partially bleached sediments, the result is that one could use one fragment to evaluate the equivalent dose and another to assess the contribution of thermal transfer resulting from preheating the natural luminescence. (C) 2003 Elsevier Science Ltd. All rights reserved.