After struggling with the noise, we achieved ~ 50 keV resolution.
Source = 1 alpha peak 241Am E=5.485 MeV
Detector E1D6 50 µm 25 V in principle, but set to 100 V
Detector E2D6 300 µm 70 V in principle, but set to 100 V
PA gain = 20 mV/MeV
Maximum output signal of the new PA (differential) = 8 V. |