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What thickness of lead is required to attenuate a broad beam of 500 keV photons to...


What thickness of lead is required to attenuate a broad beam of 500 keV photons to one half of the original number (with better than 5% precision) ? Hint: use buildup factors for this poor geometry.

Solutions

Expert Solution

Say that original number of photons be N_0

We require number of particles as=

We also know that

where x is thickness of lead required , mu is attenuation coefficient

Put

For lead the attenuation coefficient is given by:

WIth 500 keV beam     for lead

genius_generous answered 2 years ago
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