Attenuation of the primary beam occurs in which of the following ways? photons are scattered photons will not interact & pass through photons will be absorbed & scattered photons are absorbed
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Attenuation is the reduction of radiation intensity by absorption or scattering as the beam passes through matter. It is a reduction in the number of photons.
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Which one of the following statements concerning the interaction of photons with matter is CORRECT? The probability of the photoelectric effect decreases with the atomic number of the absorber. The predominant interaction of 1 keV photons with soft tissue is the Compton process. In the Compton process, the energy of the scattered photon is less than that of the incident photon. Pair production occurs for photons with energies less than 1.022 MeV. There is only partial absorption of the energy of the incident photon in the photoelectric effect.
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A narrow beam containing 10^20 photons having an energy of 6 MeV impinges perpendicularly on a layer of lead 12 mm thick, having a density of 11.34 g/cmÂł. How many interactions of each type (PE, PP, and Compton) occur in the lead? Note: 0.0015 (PE) 0.0170 (Comp) 0.0255 (PP)
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