Age dating contamination
The second is a set of new samples that the RATE team collected and sent to a leading radiocarbon AMS laboratory to be dated.
The RATE team claims the results have yielded convincing and irrefutable scientific evidence of a young earth.The age limit was roughly 30k years, due both to poor statistics from low decay count rates and to cosmic ray backgrounds.Richard Muller proposed a new measurement technique, called “accelerator mass spectrometry” (AMS), in 1976 .The maximum allowed sample size is typically about 10 mg of carbon.Larger samples produce excessive CO pressure in the sealed tubes used in the process, causing tubes to explode and samples to be lost.Each step in this process may introduce a small amount of modern carbon contamination.
More processing tends to introduce more contamination.
But the amount of contamination is generally impossible to quantify.
An old sample with in situ contamination cannot generally provide an accurate date.
This equilibrium continues through plants to herbivores and through them to carnivores.
Once an organism dies, its carbon ceases exchanging with atmospheric carbon but continues decaying with a half-life of about 5730 years.
Most radiocarbon AMS laboratories process samples using a variant of the method described by Vogel , with apparatus and processes typically optimized for samples containing about 1 mg of carbon.