You start out with a certain amount of radiocarbon and then, in 5,730 years, you have half of the original and then, in 11,460 year, a fourth of the original, then, in 17,190 years, an eighth of the original and then, in 22,920 years, a sixteenth of it will remain and soon.
It is apparent that the amount never reaches zero; it just gets extremely close after tens of thousands of years.
This radioactive isotope of carbon is called radiocarbon, or Carbon 14 (Berger) This radiocarbon is what scientists have used to determine the age of fossils and other kinds of ancient objects (Berger).
None of the references so far are really necessary.
The method was developed immediately following World War II by Willard F.
Libby and coworkers and has provided age determinations in archeology, geology, geophysics, and other branches of science.
Ionization Inverse Square Law Interaction of RT/Matter Attenuation Coefficient Half-Value Layer Sources of Attenuation -Compton Scattering Geometric Unsharpness Filters in Radiography Scatter/Radiation Control Radiation Safety Radio-carbon dating is a method of obtaining age estimates on organic materials.
The word "estimates" is used because there is a significant amount of uncertainty in these measurements.
Either we eat the plants directly and take in radiocarbon from them or we eat animals, which received radiocarbon by eating the plants themselves.
You can look at it skeptically and try to determine how old it looks or from what time period it came, but you cannot be sure your guesses are accurate. Libby, an American chemist in the late 1940s, developed a technique to determine the age of ancient objects by measuring the radiocarbon content in them (Berger). The technique has been used by archaeologists and geologist ever since.