A point source of 6MeV photons is embedded at the center of a lead sphere having a radius of 8cm. Calculate or estimate, to some reasonable engineering accuracy, the fraction of photon energy emitted by the source that leak out of the sphere.
- Note: M/p=0.0436cm2 /g
- Ma/p=0.0373cm2 /g
- p=11.34 g/cm2