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A Does an increase in gain cause peaks to shift right?

  1. Aug 7, 2017 #1


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    In a spectrum from an MCA (that is hooked up to a scintillator and PMT), does an increase in amplifier gain cause the peak to shift towards higher channels? I have a source and its really weak so while calibrating my detector, I had to turn the gain up way high to see a peak, but I'd preferably operate at much lower gain because of intense noise, however, on reducing the gain I can no longer see the peak. (Gain increase at same HV power)
  2. jcsd
  3. Aug 12, 2017 #2
    Thanks for the thread! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post? The more details the better.
  4. Aug 21, 2017 #3


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    So, do you have "PMT->Amplifier->MCA"?

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