1. Time-Independent Diffusion Equation Solution For a time-independent point source, S(r) =8(7) , the solution to the time independent diffusion equation [Eq. 5.83] @(7) 1 S(T ) 2 V2Q (7 ) = is given by Heff Ha QT = exp (-Meffr) [5.85] 47 Dr which is the time-independent 3D impulse response or Green function in an infinite homogeneous scattering medium. a. Plot the fluence rate, @(r) [W/cm2] versus /for a radius from 0 to 0.2 cm for the time- independent diffusion equation for the following properties: Ma = 0.1 cm-], us = 100 cm- 1, and g = 0.9