. "\\(\\Phi\\)"^^ . . . . "http://en.wikipedia.org/wiki/Fluence"^^ . "\\(\\Phi = \\frac{dN}{dA}\\), where \\(dN\\) describes the number of particles incident on a small spherical domain at a given point in space, and \\(dA\\) describes the cross-sectional area of that domain."^^ . . . "\"Particle Fluence\" is the total number of particles that intersect a unit area in a specific time interval of interest, and has units of m\u20132 (number of particles per meter squared)." . . "http://www.iso.org/iso/catalogue_detail?csnumber=31895"^^ . "Particle Fluence"@en .