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 5. Illustrated below is the figure of 137Cs spectrum. C9 137 spectrum 2 185 keV 200 800 200 400 Energy kevi a. Why 137Cs can be used as a background? b. Identify the Compton scattering features of the above spectrum, for LABEL 2 and 5. c. Define LABEL 4 in above illustrated spectrum d. Show that the maximum energy of the electrons is given by Emar (electron) = 2, e. Hence, calculate the mass energy of the electrons (in MeV) using the above illustrated 137Cs spectrum

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