energy flux density

https://doi.org/10.1351/goldbook.E02106
For mono-directional @R05048@, the @E02101@ traversing in a time interval over a small area perpendicular to the direction of the energy flow, divided by that time interval and by that area.
See also:
intensity
Source:
PAC, 1994, 66, 2513. (Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2519 [Terms] [Paper]