\(\Psi = \frac{dR}{dA}\), where \(dR\) describes the sum of radiant energies, exclusive of rest energy, of all particles incident on a small spherical domain, and \(dA\) describes the cross-sectional area of that domain.
n3:latexSymbol
\(\Psi\)
n3:plainTextDescription
"Energy Fluence" can be used to describe the energy delivered per unit area