KINETIC PARAMETERS OF THERMOLUMINESCENCE BASED ON ISOTHERMAL DECAY CURVES

The majority of the current techniques for getting the recurrence factors utilize the snare profundity making a few suppositions about the request for the energy. This causes irregularities in the announced benefits of catching boundaries due that the estimations of the actuation energy got by various techniques contrast obviously among them. At that point, it is important to utilize a technique autonomous of the snare profundity utilizing the isothermal iridescence rot (ILD) method. The catching boundaries related with the unmistakable shine pinnacle of BeO (280°C) are accounted for using ILD strategy. As a check, the snare boundaries are additionally determined by sparkle bend shape strategy subsequent to disconnecting the conspicuous shine top by warm cleaning procedure. Our outcomes show an awesome arrangement between the catching boundaries determined by the two techniques. ILD strategy was utilized for deciding the catching boundaries of BeO. Results got applying this technique are in acceptable concurrence with those acquired utilizing different strategies, besides in the estimation of the recurrence factor.

Testing the suitability of dim sedimentary quartz from northern Switzerland for OSL burial dose estimation

We investigate the suitability of sedimentary quartz associated with former glacial advances in northern Switzerland to provide reliable burial dose estimates using Optically Stimulated Luminescence (OSL). Previous studies on northern alpine quartz show that its signal characteristics can be poor and potentially problematic. We analyse quartz signals of small aliquots, which reveal the presence of a prominent medium or slow component in the initial part of some signals. Nonetheless, rejection of aliquots with unfavourable signal composition does not alter the burial dose estimates, but significantly reduces the data set for De determination. Signal lifetimes from isothermal decay measurements cover a wide range of values, yet the lowest lifetimes are high enough to guarantee a reliable burial dose estimate for samples of < 400 ka. Comparison of small aliquot and single grain burial dose distributions reveals that signal averaging masks partial bleaching in some of the samples. We therefore strongly recommend single grain measurements for samples from this setting and area, in order to exclude age overestimation due to partial bleaching.