Home Contents Glossary Search Help

Energy calibration
Up Next


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?



The University of Liverpool
1999, 2000 The University of Liverpool, Department of Physics

EPSRCProject funded by The Engineering and Physical Sciences Research Council

Materials Teaching Educational ResourcesWebsite developed and maintained by the MATTER Project