Radiation hazards

Radiation hazards

Terms related to radiation and its hazards.

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Radiation hazards

Radioisotope

Environment; Radiation hazards

An unstable isotope of an element that decays or disintegrates spontaneously, emitting radiation.

Effective half-life

Environment; Radiation hazards

The time required for the amount of a radioactive element deposited in a living organism to be reduced by 50% from the combined removal mechanisms of radioactive decay and biological elimination.

Effective dose equivalent

Environment; Radiation hazards

The sum of the products of the dose equivalent to the organ or tissue and the weighting factors applicable to each of the body organs or tissues that are irradiated.

Embryo

Environment; Radiation hazards

The developing human organism from conception until the time of birth. More specifically; embryo: 2 weeks (implantation) - 8 weeks; foetus : 8 weeks - term.

Foetus

Environment; Radiation hazards

The developing human organism from conception until the time of birth. More specifically; embryo: 2 weeks (implantation) - 8 weeks; foetus : 8 weeks - term.

Exposure

Environment; Radiation hazards

1) A measure of the ionisation produced in air by x or gamma radiation. The unit of exposure is the Roentgen (R). 2) Being exposed to ionising radiation or to radioactive material.