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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

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