|Q:||Ask a Question about Radioactive healing|
The energy generated heats water, which cools the reactor and can be used to power electrical generators.
Radiation from radioactive isotopes is used in medicine to destroy cancer cells. Radiation from an unstable isotope, such as radioactive cobalt, can be focused onto the site of a tumor to destroy the invading cells.
Radioactive isotopes with very short half-lives are also used to locate areas of disease.
What does half-life mean?
Particles continuously escape from the nucleus of radioactive elements, in a process called radioactive decay. Half-life is the time taken for half of a substance's atoms to decay into a different element. Uranium-235 has a half-life of nearly 250,000 years, while polonium-214 has a half-life of a tiny fraction of one second.
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Date Added: 13 December '11
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