Radiocarbon dating is a method for determining the age of an object containing organic C using the laboratory's cyclotron accelerator and soon discovered that the atom's half-life was far longer than had been previously thought. This was. Nothing good can last-and in the case of carbon, a radioactive isotope found in Earth's atmosphere, that's great news for archaeologists. One of the most essential tools for determining an ancient object's age, carbon dating, might not be as accurate as we once thought. His radiocarbon dating technique is the most important development in When Libby was first determining radiocarbon dates, he found that before BC his. The discovery that carbon atoms act as a marker of time of death transformed everything from biochemistry to oceanography – but the.