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To send samples to Keck-CCAMS at the UC Irvine for analysis, the following steps are required: Submitters, and in particular those making their first application, must make contact with the laboratory to discuss their requirements prior to actually submitting samples. A submission form plus a sample list provided must be filled out (see guidance document) for each group of samples submitted and sent to us via mail, fax or e-mail.A hard copy of both must also accompany the samples. laboratory is currently equipped to handle routine processing of charcoal, wood, seed, carbonates, animal remains, etc.However, it is up to the submitter to define and select the materials to be dated: for example, since you know your samples far better than we do, it’s your job to pick out the macrofossils or charcoal to be dated from within the sediment or peat matrix.Specialized services such as pollen or foram picking or individual compound separation are not offered.How do scientists know how old an object or human remains are?What methods do they use and how do these methods work?
To obtain a truly absolute chronology, corrections must be made, provided by measurements on samples of know age.It is used in dating things such as bone, cloth, wood and plant fibers that were created in the relatively recent past by human activities.A quantity discount of 10% will be applied to submissions of 10 or more samples.Carbon-14 has a half-life of 5,730 ± 40 years— during the succeeding 5,730 years.Because carbon-14 decays at this constant rate, an estimate of the date at which an organism died can be made by measuring the amount of its residual radiocarbon.
Radiocarbon decays slowly in a living organism, and the amount lost is continually replenished as long as the organism takes in air or food.