Indeed, today it is generally agreed that Libby was wrong and that the half-life of C14 is actually closer to 5730 years .
This is a discrepancy of 162 years and becomes very significant when dating samples thousands of years old.
All three of these isotopes occur naturally in our atmosphere in the following proportions: C12 – 98.89%, C13 – 1.11% and C14 – 0.00000000010% .
The stable isotopes of carbon (12 and 13) were formed when all of our planet’s atoms materialised –a long, long time ago .
Herein lie the basic backbone principles of radiocarbon dating as a tool of science and archaeology.
It is a fact that radiocarbon is absorbed into the biosphere.
Libby discovered that radiocarbon decays with a half-life of 5568 years .But with his Nobel Prize for chemistry came complete belief from Libby in his new system.Libby radiocarbon dated Egyptian archaeological samples that had already been historically dated – the ancient Egyptians kept good records of their chronology.However, my research has indicated that there are two serious issues of concern with radiocarbon dating that still cause serious problems today.These are 1) Sample contamination, 2) Measuring the levels of C14 in our atmosphere over the geological ages. Although such methodical incompetence would never be tolerated today, archaeological samples still suffer from contamination.