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Energy calibration
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This procedure is simply the relating of the channel position of the peak in a gamma spectrum to the energy of the gamma-ray.
  • Assume a linear relationship between the gamma energy and channel number, y = mx + c
  • Choose a radionuclide that gives two well spaced peaks or a mixture of nuclides for energy calibration processes
  • Place the source to give a few thousand cps and collect for ~2000 s
  • Using the MCA cursor, make a note of the channel number corresponding to the maximum of each peak
  • Solve the two simultaneous equations to find the slope and intercept
[ Java applet here ]
If a peak was found at channel number 403, what energy would it be in the spectrum?

 

 

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