Absorbed Dose in Radioactive Media I Introduction Alpha Disintegration Introduction In this section we will consider radioactive processes and the deposition of absorbed dose in radioactive media
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Graph of the data in the table for a broad plane beam of 1-MeV -rays in water
Illustration of the reciprocity theorem as applied to estimate the -ray dose at point P within a homogeneous, uniformly radioactive object V
Radius of unit-density tissue sphere needed to absorb 50% and 90% of the emitted photon energy from a central point source in an infinite homogeneous medium
Ratio of average absorbed doses in uniformly radioactive tissue spheres with/without surrounding non-radioactive tissue medium
which roughly approximates the ratio of -ray dose at P to that present if RE conditions existed
where ½ symbolizes the half-life, or the time needed for ½ of the original number of “parent” atoms of Ra-226 to decay to the “daughter product”, Rn-222