Dose 2016

5.2 Required quantities: Particle number

More general, in a time independent situation the number N may be described within a six dimensional phase space (x; Ω ;E) in which:

x = (x1; x2; x3) is the spatial coordinate,

Ω is the particle direction which is a point on a unit sphere S with the angles coordinates ϕ and θ

E is the energy variable.

E), , z, y, x,( θϕ

NN =