A case study of fluvial sands from the lower terrace of the Moselle valley is then presented to describe the range of field and laboratory procedures required for successful luminescence dating.
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.
When electrons are released from traps the intensity of emitted luminescence follows linearly the amount of released electrons and can be used to find out the total amount of trapped electrons.
From the amount of trapped electrons we can find out the total dose of radioactive radiation that has affected the crystals.
In dating the TL-method can be used to determine the age from samples that have been heated during their manufacturing process or when used (for example stones from fireplaces, bricks and ceramics).
OSL-method can be used for example when dating sand formations.
Luminescence dating utilises energy deposited in mineral lattices by naturally occurring ionising radiation to record information encoding chronology, depositional process information, and thermal history records in ceramics, lithics, and sedimentary materials.
The information is stored through charge trapping processes in populations of point defects in common minerals, and can be reset by heating (for ceramics and heated lithic materials) and/or exposure to light (for sediments and exposed rock surfaces).
La place des datations OSL dans la recherche géomorphologique en France et son potentiel pour les recherches futures sont décrits à travers une présentation de la diversité des environnements sédimentaires et des problématiques pouvant être traités.
A well calibrated laboratory can produce accuracy at the lower end of the precision scale.
For high quality work it is important that the environmental gamma dose rates are recorded in-situ at time of excavation, which is most readily facilitated by involving the dating laboratory in fieldwork.
This total dose can be used to the age determination when we measure the dose rate of radiation that has given that dose.
Age (the time from the latest emptying of traps) can be found out by dividing the total dose with dose rate.