Tl dating laboratory
To obtain a truly absolute chronology, corrections must be made, provided by measurements on samples of know age.
The most suitable types of sample for radiocarbon dating are charcoal and well-preserved wood, although leather, cloth, paper, peat, shell and bone can also be used.
A sample of recently deposited similar material should also be submitted in order that the TL starting point at the time of deposition can be measured and a suitable correction applied.
In the case of an aeolian deposit this may be collected as a surface peel on adhesive tape or from the subsurface of the deposit.
TL Age = Palaeodose (P) _____________ (ARD) TL samples may be collected in open ended or opaque PVC tubes approximately 12cm in length and 6cm in diameter.
Whilst it advisable to protect the sample from direct sunlight there is no need to sample at night and the orientation of the specimen is not important.
Application of this method of age determination is limited to those periods of pottery and fired clay availability ( from about 6000 BC to the present). 50 Denison Drive Guilford, CT 06437 (203) 453-3299 University of Hawai'i Hawai'i Institute of Geophysics and Planetology 2525 Correa Road Honolulu, HI 96822 (808) 956-8761 FAX (808) 956-3188 University of Washington Luminescence Laboratory, DH-05 Seattle, WA 98195 (206) 543-1506 FAX (206) 543-3285 American Council of Independent Laboratories 1629 K Street, NW Washington, DC 20006 (202) 887-5872 FAX (202)887-0021 E-mail: [email protected] of independent testing, research and inspection laboratories. 101 West Edison Avenue, Suite 250 Appleton, WI 54915 (920) 749-3040 FAX (920) 749-3046 Testing and analysis for the pulp, paper, and allied industries. FAO/IAEA International Symposium on Managing Soils for Food Security and Climate Change Adaptation and Mitigation, Vienna, Austria 23-27 July 2012 Hua, Quan. Radiocarbon: A chronological tool for the recent past.
This effect cannot be determined in the laboratory from the sample submitted.
This correction becomes a little more difficult in the case of waterborne sediments but may be determined from a subsurface sample of recently deposited similar material.