Determine the number of photons incident on water phantom, Science

a. A 2 mm diameter parallel beam of photons each with energy of 100 keV is incident on a water phantom of thickness 15 cm. If the exit exposure is 2 mR (caused by primary photons), determine the number of photons incident on the water phantom.

b. What would be your answer in (a) if the beam diameter was twice as big?

 

Posted Date: 4/1/2013 4:01:37 AM | Location : United States







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