Higher sensitivity isotope readers have recently given palaeontologists ... although not always, are low in nitrogen-14 on ...

Over time, the carbon-14 decays into nitrogen-14; half will do so after about 5,730 years (this is the isotope's half-life). After about 60,000 years, all of the carbon-14 will be gone.

In 1940 Martin Kamen discovered radioactive carbon-14 (an isotope of carbon) and found that it had a half-life of about 5,700 years. Scientists had also found that some of the nitrogen in the ...

To understand the researcher's approach, it is important to know that nitrogen has two stable isotopes, two different states so to speak, 15 N and 14 N. Gehringer explains, "Nitrogen gas is a ...

Naturally-occurring stable isotopes of water and other substances are used to trace the origin, history, sources, sinks and interactions in water, carbon and nitrogen cycles. Stable isotopes can also ...