Suppose you place isotropic sources at the four corners of a square of side "a" in an infinite medium. Assuming each isotropic source emits an equal number of neutrons per second, let us say "S" neutrons per second. Find:
A. Total flux at the center
B. Current at the center
Given:
Flux from point source at distance "r" is given by
Φ = A/ (r^2)