Gamma

Gamma radiation is electromagnetic radiation with a very short wavelength, and gamma photons have the highest amount of energy in the electromagnetic spectrum. When an atomic nucleus emits gamma rays, they do not alter the number of protons and neutrons in the nucleus, but they instead move the nucleus from an unstable to a stable state. Atomic nuclei usually emit gamma rays right after alpha decay, beta decay, and other nuclear decay processes.

Gamma rays are commonly used in medicine. They are used to examine the body, and they are especially important for looking for tumours. Gamma rays can sometimes be used to treat the tumours as well.