Atomic mass spectrometry dating
The calibration method used and any further contextual information should also be supplied.
C ages of samples were calculated by decay counting in mainly scintillation counters.
AMS employs a high-energy tandem accelerator to raise ion energies to the mega-electron-volt (Me V) range and enable complete destruction and avoidance of isobaric interferences.
Typical AMS is thus capable of measuring very small isotope ratios, typically in the range of 10 range measured with other mass spectrometers (except for laser-based systems with resonance ionization techniques, which can match the range of the AMS).
Accelerators were developed to bombard targets with energetic ions for fundamental physical science purposed.
Due to the perturbations in the absorption of radiocarbon over the millennia, the variance is sometimes full of ‘wiggles’ on the curve, so placement can occur at two or more points..
The convention calls for reporting the provenience of the sample, the laboratory number, the radiocarbon age, and then the calibrated (in this case dendrocalibrated) age at one or two standard deviations (note that most of these dates yielded multiple intercepts).