Archaeological dating techniques all dating agencies in the uk
Archaeology and anthropology are the study of historic human remains and the objects, buildings and other artefacts associated with them.
Forensic archaeologists and anthropologists can apply the same techniques to crime scenes, to get evidence from human remains, as well as from drugs, guns or stolen goods found at crime scenes, whether recent or decades old.
When it comes to dating archaeological samples, several timescale problems arise.
For example, Christian time counts the birth of Christ as the beginning, AD 1 (Anno Domini); everything that occurred before Christ is counted backwards from AD as BC (Before Christ).
Using a kind of "ray gun," scientists fire X-rays at a sample, boosting the energy of electrons inside the sample, where they emit new X-rays that correspond to specific elements, such as zinc or copper.
Art museums use similar techniques to study paintings.
Forensic archaeologists can date items found in grave sites, including bones, using a range of techniques.
[10 Modern Tools for Indiana Jones] "I go out and do archaeology with a ray gun," Frahm told Live Science, adding, "It doesn't get more sci-fi than that." Frahm and his colleagues have developed a portable version of X-ray fluorescence (XRF), a common technique for determining the chemical makeup of an artifact.
By measuring the ratio of the radio isotope to non-radioactive carbon, the amount of carbon-14 decay can be worked out, thereby giving an age for the specimen in question.