Radiation Protection Glossary
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Gamma Rays are a type of high energy
Electromagnetic
Electromagnetic spectrum
in the form of
Photons
which have no mass. In
Radioactive Decay
they originate from changes in the structure and energy levels of the
Atomic Nucleus
, or, through electron-positron annihilation or by nuclear
fission
Gamma rays travel greater distances than either
Alpha Particles
or
Beta Particles
and are much more difficult to shield.
