Le site de vulgarisation scientifique de l’Université de Liège. ULg, Université de Liège
Half-life

The time taken for a substance (medicine, radioactive nucleus) to lose half of its pharmacological, physiological or radioactive activity. In particular, half-life is the time necessary for a radioactive element to lose half of its activity through natural disintegration.

© 2007 ULi�ge