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Physics Course/Radiation/Radioactive Decay Radiation

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Radioactivity is the conversion of one nuclear state to another only happen with elements that has unstable Nuclei . It involves Decay of Radioactive Element accompany by an emission of streams of Charged Particles namely Alpha, Beta , Gamma called Electromagnetic radiation in the form of Invisible Light and a release of enormous Heat Energy into the surrounding calculated by Einstien's Formula

E = M C2


  correspond to difference in mass during the radioactivity .

Radioactive Decay

Most sources of natural, predictable radiation come from the decay of atomic nuclei, resulting in either alpha -   or beta -   particles. In general,   decay is more common among the heavier elements, as it reduces the proton:neutron ratio, while   decay is much more prominent among lighter elements, as it converts a neutron into a proton.

Alpha Decay


This is the first decay in the famous Uranium decay. U-238 is essentially non-radioactive (especially compared to hyper-active U-235), and has a half-life of over four billion years.

Beta Decay


This is the decay that allows for carbon dating, and has a half-life of over 5000 years.

Gamma Decay

Gamma radiation is much more difficult to come by, as emitting a gamma ray does not allow an atomic nuclei to decay. The most famous source of high-energy gamma rays is what happens when an electron and a positron annihilate: