Start Osl dating ppt

Osl dating ppt

In diagnostic imaging the increased sensitivity of the OSL dosimeter makes it ideal for monitoring employees working in low-radiation environments and for pregnant workers.

The paper then explains how OSL dating is applied to obtain a depositional age, through the field and laboratory procedures employed.

These procedures are described as clearly as possible in order to provide useful information for geomorphologists interested in the method, and illustrated by a case study that has involved luminescence dating of fluvial sands (samples LUM 975 and LUM 978) from the lower alluvial terrace of the Moselle River (M1 terrace as defined by S. However, it is essential to keep in mind that the protocols (preparation of the sediments, measurements) may vary from one laboratory to the other: the presentation does not aim to be exhaustive, but to reference the main procedures at each step of the dating.

From the conduction band they may recombine with holes trapped in hole traps.

If the centre with the hole is a luminescence center (radiative recombination centre) emission of light will occur.

The paper also reviews the place of OSL dating in geomorphological research in France and assesses its potential for further research, by focusing on the diversity of sedimentary environments and topics to which it can be usefully applied.

Hence it underlines the increasing importance of the method to geomorphological research, especially by contributing to the development of quantitative geomorphology.

It is also used for dating the deposition of geological sediments after they have been transported by air (aeolian sediments) or rivers (fluvial sediments).

In archaeology, OSL dating is applied to ceramics: The dated event is the time of their last heating to a high temperature (in excess of 400 °C).

For beta particles with energies from 150 ke V to in excess of 10 Me V, dose measurement ranges from 10 mrem to 1000 rem.

Neutron radiation with energies of 40 ke V to greater than 35 Me V has a dose measurement range from 20 mrem to 25 rem.

The electrons that have been excited to the conduction band may become entrapped in the electron or hole traps.