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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-21 20:03 |
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Conference: Bucharest University Faculty of Physics 2008 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
The pre-dose technique applied in dating of archaeological samples. Comparison with the classical TL dating technique.
Authors:
Marius Calin*, Norbert Vana**
Affiliation:
*University of Bucharest, Faculty of Physics
** Atomic Institute of Austrian Universities, Vienna
E-mail
mariuscalin@brahms.fizica.unibuc.ro
Keywords:
pre-dose technique, pre-dose effect, thermal activation, TL dating, irradiation dose, TL signal
Abstract:
The pre-dose technique is based on the measurement of the change in sensitivity of the 110°C TL peak of quartz which occurs with the combined effect of radiation exposure followed by rapid heating (thermal activation), usually between 500 and 600°C. It is a technique requiring considerable experimental effort to yield dose estimates, primarily due to the complexity of the pre-dose effect on which it is based. An aspect which raises the greatest potential difficulty for experimental investigation is the particular nature of archaeological ceramic samples. The ceramic samples contain different types of quartz and a lot of other minerals such as feldspars. The removal of such minerals from samples during the preparation process is advisable, but also the feldspars themselves present a pre-dose effect which can be used in dating (if the sample contains small quantities of quartz and it is hard to extract it).It is discussed a number of properties of the pre-dose effect associated with quartz and other minerals extracted from dating samples. The results of TL dating throughout this technique are presented and it is made also a comparison of these results with those obtained by means of “classical” TL dating technique. It has important potential in the dating of ceramics of the last two millennia, in accident dosimetry and in the study of the role of defects in thermoluminescence processes.
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