The 15th Conférence Générale des Poids et Mesures,

by reason of the pressing requirement, expressed by the International Commission on Radiation Units and Measurements (ICRU), to extend the use of the Système International d'Unités to radiological research and applications,
by reason of the need to make as easy as possible the use of the units for non-specialists,
taking into consideration also the grave risks of errors in therapeutic work,

adopts the following special name for the SI unit of activity:
becquerel, symbol Bq, equal to one reciprocal second.