(Solved): Co60 spectrum A spectrum is taken using the MCA (set to 1024 channels) with a Co-60 source for a ga ...

Co60 spectrum A spectrum is taken using the MCA (set to 1024 channels) with a Co-60 source for a gain of 100 on the amplifier unit. From your previous measurements of Cs137 at this gain setting the photopeak was observed in channel 401. Using the energy calibration for Cs137, in what channel do you expect to find photopeak from the highest energy gamma emitted by the Co60 source? Answer: Compare the energies of the gamma rays emitted from Co60 and Cs137. Look up the precise energies emitted, don't rely on the rough values given in the first question. The Cs137 energy calibration has zero energy at channel 0 as one reference point.