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Samples used for radiocarbon dating must be handled carefully to avoid contamination.

Not all material can be dated by this method; only samples containing organic matter can be tested: the date found will be the date of death of the plants or animals from which the sample originally came.

Approaching archaeological techniques and artifacts from an interpretive viewpoint, the series looks in detail at specific classes of artifacts that have contributed most to our knowledge of the past, and at particular investigative techniques that are now being used to refine this knowledge and thereby to question previous assumptions.

In Radiocarbon Dating, Sheridan Bowman provides a much-needed introduction to the complex field of carbon dating.

Even for the first investigation, there was a possibility of using radiocarbon dating to determine the age of the linen from which the shroud was woven.

The size of the sample then required, however, was ~500cm, which would clearly have resulted in an unacceptable amount of damage, and it was not until the development in the 1970s of small gas-counters and accelerator-mass-spectrometry techniques (AMS), requiring samples of only a few square centimetres, that radiocarbon dating of the shroud became a real possibility. The shroud was separated from the backing cloth along its bottom left-hand edge and a strip (~10 mm x 70 mm) was cut from just above the place where a sample was previously removed in 1973 for examination.

Since it was created after the start of atomic testing, it incorporates bomb carbon, so measured activity is higher than the desired standard.

Writing lucidly and knowledgeably, she explains the uses and quirks of radiocarbon results, illustrating them with such famous examples as Stonehenge and the Shroud of Turin.

With its clear presentation of how to collect samples for radiocarbon dating, her book will be an invaluable source for all archaeologists and geologists. PAPERBACK EDITION, PAPERBACK copy is good, solid, mild wear, unmarked text, PAPERBACK EDITION. Used books may not include companion materials, some shelf wear, may contain highlighting/notes, and may not include cd-rom or access codes.

Wood contains cellulose, lignin, and other compounds; of these, cellulose is the least likely to have exchanged carbon with the sample's environment, so it is common to reduce a wood sample to just the cellulose component before testing.

However, this can reduce the volume of the sample down to 20% of the original size, so testing of the whole wood is often performed as well.




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