Answer:radiocarbon dating
Step-by-step explanation:
Radiocarbon dating is a method for determining the age of an object continuing organic materials by using the peppering for Radiocarbon ,a radio active isotope of carbon.
This method was originally done by beta counting device which counted the amount of beta radiation emitted by the C14 of the decaying substance
More recently the method called accelerated mass spectrometery has become the method of choice