great care must be taken in collecting and packing samples to avoid contamination by more recent carbon. because the decay rate is logarithmic, radiocarbon dating has significant upper and lower limits. Rising CO2 levels in the atmosphere are, however, artificially aging the atmosphere and this might drastically interfere with the accuracy of radiocarbon dating.According to a new paper published by a team at the Imperial College London, “by 2050 a new T-shirt would have the same radiocarbon date as a robe worn by William the Conqueror a thousand years earlier.”Radiocarbon dating works by comparing the three different isotopes of carbon, where an isotope is an element with the same number of protons, but different number of neutrons.
Each radioactive isotope has its own rate, expressed in terms of its half-life.
Accelerator mass spectrometry (AMS) is a modern radiocarbon dating method that is considered to be the more efficient way to measure radiocarbon content of a sample.
In this method, the carbon 14 content is directly measured relative to the carbon 12 and carbon 13 present.
When the stocks of Oxalic Acid I were almost fully consumed, another standard was made from a crop of 1977 French beet molasses.
Archaeology and other human sciences use radiocarbon dating to prove or disprove theories.
It is not very accurate for fairly recent deposits.