Radioactivity

Every material Earth is composed of atoms, and electrons rotating around a nucleus made up of protons and neutrons. Some atoms are stable while others are unstable.
To reach a stable state, it removes its own protons, neutrons, and electrons by itself, a process called radioactive decay.
In other words, radioactive decay can be defined as the spontaneous radiation emission of unstable atoms. The ray produced by radioactive decay is called radiation. Radiation includes alpha-, beta-, gamma-, neutron- and X-ray used for patient diagnosis.

Characteristics of radiation

Danger of Radiation

When the human body is exposed to radiation, it can damage DNA (e.g.cancer, infertility, birth defects) through physical and chemical reactions.
Depending on the degree of damage, the effect on the human health may vary.

Effect on the human according to radiation dose