This dating service operates on a commercial basis and in conjunction with NERC/ARHC which funds the NRCF programme for British archaeologists, and with Historic England.
This dating service provides support for all stages of radiocarbon dating from project design and sample choice right through to data analysis.
From these records a “calibration curve” can be built (see figure 2, below).
Now the curve extends (tentatively) to 50,000 years.Carbon-14 is produced in the atmosphere when neutrons from cosmic radiation react with nitrogen atoms: C ratio of 0.795 times that found in plants living today. Solution The half-life of carbon-14 is known to be 5720 years. Radioactive decay is a first order rate process, which means the reaction proceeds according to the following equation: is the quantity of radioactive material at time zero, X is the amount remaining after time t, and k is the first order rate constant, which is a characteristic of the isotope undergoing decay.The Oxford Radiocarbon Accelerator Unit (ORAU) is a radiocarbon laboratory engaged in collaborative research across many disciplines where the measurement of the radiocarbon isotope is useful including: The laboratory provides a radiocarbon dating service for people undertaking research in all these areas.If 1% of the carbon in a 50,000 year old sample is from a modern contaminant, the sample will be dated to around 40,000 years.Because of this, radiocarbon chemists are continually developing new methods to more effectively clean materials.