Hazards of different types of radiation:
The calculation of the biological dose takes into account the toxicity of the radiations involved through a ‘radioactive weighting factor’ . There is a clear hierarchy as to how dangerous different types of radiations are to absorb or ingest, with neutrons and alpha particles being far more harmful than electrons or gamma rays. This coefficient allows to convert the amount of energy absorbed locally (in grays) to a biological dose in sieverts, the equivalent dose.