I am currently making a spherical shell source to surround an object, and specifically need to source to only enclose the inside of the shell. What parameters must I add so that none of the source is directed out of the shell. Here is what I have now.
source = openmc.Source()
source.space = openmc.stats.spherical_uniform(r_outer=200,r_inner=190)
source.angle = openmc.stats.Isotropic()
source.energy = openmc.stats.Discrete([14e3], [1])
source.particle = 'photon'
Do I need to use openmc.stats.PolarAzimuthal to adjust direction?