Earth and Planetary Sciences » Geology and Geophysics » "Geochronology - Methods and Case Studies", book edited by Nils-Axel Morner, ISBN 978-9-1, Published: July 25, 2014 under CC BY 3.0 license. (a) Irradiation leads to electrons being expelled from their original site and diffuse within the lattice. Energy Level diagram illustrating the creation of luminescence centres in crystal lattices through exposure to ionising radiation (redrawn from ).Dating agricultural terraces is a notoriously difficult problem for archaeologists.
When pottery is fired, it loses all its previously acquired TL, and on cooling the TL begins again to build up.(b) Electrons become trapped while holes of missing electrons become localised at particular centres.(c) Stimulation (by heat or light) results in electrons being evicted from the traps and diffusing until they meet a recombination centre.The maximum limit of any OSL dating technique is not defined by a fixed upper age limit, but instead by the maximum radiation dose the sample can accurately record before the OSL signal saturates.The challenge is to assess this upper limit of accurate age determination without necessitating comparison to independent age control. It is an absolute dating method, and does not depend on comparison with similar objects (as does obsidian hydration dating, for example).