. . "\\(\\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."^^ . "\"Energy Fluence\" can be used to describe the energy delivered per unit area" . "http://www.iso.org/iso/catalogue_detail?csnumber=31895"^^ . . "\\(\\Psi\\)"^^ . . "Energy Fluence"@en . "http://en.wikipedia.org/wiki/Fluence"^^ . .