Question

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

Answer 1

600 - X-ray Photo Peak 400+ count Lead X-ray Gramma Photo peak 6 Backscatter n compton ? . Shelf Oo 200 400 Energy (kev) too 800 CSScanned with CamScanner

Q (A)(B) (C)= there is agood spread between the Xray and gama photo peak, this source makes for agood calibration source and background. A shown (a). . Xrays Back scatter peak (due to 1800 back cattering this peak occurs) (©). 1. cromption plateau. (d) crompton edge @). Photopeak (the characteristic 662 Ker Peak does not originate directly from (5.137 but from the decay of the doughter nuclide Ba. 137) CSScanned with CamScanner