Skip to ContentSkip to Navigation
Education Programmes Other study opportunities Groningen Academy for Radiation Protection


The quantity fluence (Φ) indicates the flow per unit of area of particles or otherwise. The name is derived from the Latijn word fluere, meaning "to flow". The corresponding unit is reciprocal square meter (m-2).

The quantity fluence rate (dΦ/dt) is the flow per unit of area and per unit of time. The corresponding unit is (m-2 s-1).

From the definitions it follows that fluence rate = flux density.

Related unit / quantities:

Last modified:15 January 2021 4.35 p.m.
View this page in: Nederlands