In medical fields, radioactive sources are widely used for medical diagnosis, treatment and sterilization. In agriculture, it can be used for irradiation breeding, which can improve quality, increase production, and can also be used for sterilization and preservation. In the industrial aspect, it can be used for petroleum, coal and other resource exploration, ore composition analysis, industrial flaw detection, non-destructive testing, material modification and material level, density, thickness measurement, etc. Radiation detector source can also be used for satellite power supply, fire smoke alarm, sewage treatment   .

Radiotherapy is radiation therapy ( Radiotherapy   ): With X-ray irradiation, gamma] lines, wires, etc. in cancer tissues, since the biological effects of the radiation, the maximum amount capable of killing cancerous tissue, cancerous tissue damage, reduced it to eliminate the lesions. It is an important means of treating malignant tumors and can produce good results for many cancers.

The radioactive isotope iodine -131 is used to treat thyroid line cancer; in the treatment of certain cancers, gamma rays emitted by cobalt- 60 are also used to inject into the human body to kill cancer cells.

Ionizing radiation (ionizing radiation)

When a particle passes through a substance, it electrostatically interacts with the extranuclear electron of the substance, causing the atom in the substance to lose orbital electrons to form a pair of positive and negative ions, called ionization; ionizing radiation is a general term for all radiation that can cause ionization of substances, and there are many types, high-speed charging. The particles have alpha particles, beta particles, protons, and uncharged particles have neutrons as well as X -rays and gamma rays.

Irradiation dose (exposure dose)

The amount of exposure is a physical quantity that measures the ionization power of X -rays and γ -rays. It reflects the nature of the air radiation field and indirectly reflects the strength of X -rays and γ -rays.

Absorbed dose (absobed dose)

Any average energy ionizing radiation means a unit mass granted target substance (or substance absorbed per unit mass), is a very significant amount of radiation protection, it applies to any type of ionizing radiation and any material to be irradiated, And suitable for internal and external exposure.

Equivalent dose (Dose equivalent)

It is a measure of the difference in damage effect caused by different radiation types when the energy of the target tissue is the same.