AMS Radiocarbon Dating
Definition
Accelerator Mass Spectrometry measurement of the ratio of carbon-14 to carbon-12 in a sample. It requires milligram-scale samples and produces a raw radiocarbon age that must be calibrated against a reference curve (IntCal20) to yield a calendar-year range.
Related terms
- Bomb-Pulse Dating
- Use of the post-1952 atmospheric 14C spike, produced by nuclear weapons testing, to date biological tissues formed since 1950. Because the spike...
- Calibration Curve
- In RIA, a set of standards containing known concentrations of unlabelled analyte that are run alongside test samples. Bound radioactivity is measured...
- Dendrochronology
- The science of dating by tree-ring sequences. Each annual ring encodes the growing conditions of that year; matching ring patterns to a...
- OSL (Optically Stimulated Luminescence)
- A dating method that measures the accumulated radiation dose stored in mineral grains (usually quartz or feldspar) since they were last exposed...
- Terminus Post Quem (TPQ)
- Latin for 'limit after which.' The date of the youngest datable item in a context sets the earliest possible date for the...
Explained in
- Radiocarbon and Other Dating MethodsAccelerator Mass Spectrometry measurement of the ratio of carbon-14 to carbon-12 in a sample. It requires milligram-scale samples and produces a raw radiocarbo...