Sorry,[Local Link Removed for Guests] ha scritto: [Local Link Removed for Guests]20/01/2022, 13:19Compton scattering that happens inside the detector is less critical. In the situation when you make spectrum inside the lab the source is usually prepared and separated and it's not an issue to identify.
But that isn't the case. If that would indeed be the case, when a gamma-ray logging would be performed (that is with the detector surrounded by rock walls) there should be no Compton. Instead you add even more Compton scattering when you let the source rays pass through the dense matter and the hole effect is to swamp the peaks below 0.5 MeV in the Compton scattering. In fact, that is basically what you observe in what you have presented.
So a true statement would be: you have a lesser Compton effect when measuring a source with no obstacles (in air), but you would add far more Compton when you add obstacles in-between your detector and source. So the spectroscopy with scintillation crystals is only making sense above 1.0 MeV in thick shielding conditions.
So, in conclusion, the case you are presenting is not a case of Compton suppression, but rather a case of Compton addition.