Radioactive isotope dating definition
industry, radioactive isotopes of various kinds are used for measuring the thickness of metal or plastic sheets; their precise thickness is indicated by the strength of the radiations that penetrate the material being inspected.
They also may be employed in place of large X-ray machines to examine manufactured metal parts for structural defects.
Only a small fraction of the isotopes are known to be stable indefinitely.
The method was developed by Willard Libby in the late 1940s and soon became a standard tool for archaeologists.
Libby received the Nobel Prize in Chemistry for his work in 1960.
The amount of the isotope in the object is compared to the amount of the isotope's decay products.
Radiocarbon dating is one kind of radiometric dating, used for determining the age of organic remains that are less than 50,000 years old.