The results showed that Ötzi died over 5000 years ago, sometime between 33 BC. Uranium has a very long half-life and so by measuring how much uranium is left in a rock its approximate age can be worked out. As soon as a living organism dies, it stops taking in new carbon.This article summarizes the purpose, history, and intermediate findings of the RATE project five years into an eight-year effort.
These are used in Positron Emission Tomography to study brain physiology and pathology; for detecting the location of epileptic foci; and in dementia, and psychiatry and neuropharmacology studies.
They are also used to detect heart problems and diagnose certain types of cancer.
The nucleus is held together by something called the binding energy.
In most cases, elements like to have an equal number of protons and neutrons because this makes them the most stable.
Anything that dies after the 1940s, when Nuclear bombs, nuclear reactors and open-air nuclear tests started changing things, will be harder to date precisely.