How Does Water Layer Thickness Affect Radiation Dose from 2-MeV Photons?

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    medical phyics
ivan ardila
A layer of water 1 mm thick between two equilibrium-thickness layers of Teflon
is irradiated by 2-MeV photons.
(a) From Burlin theory calculate the approximate average dose in the water
(EWaitfc thre) collision kerma in the adjacent Teflon is 10 Gy. Take pen/
p = 0.0225 cm2/g for Teflon, use Eq. (10.47) as amended by Janssens et
al. (1974) to obtain 0, assume a diffuse electron field, and neglect y-ray
attenuation.
-W hat are the small-cavity (B-G) and large-cavity limiting values for
DW,,,,?
 
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