I need to let it run longer but right now it looks like the 59.5 peak is at 3486 instead of the 3494 indicated in Geo's calibration.? The would account for the confusion at the top end over
HfKa1=55.79
TaKa2=56.28
After letting this Am241 run for a good amount of time I'll adjust the calibration.
when you can Charles, turn your Am button towards the Si-PIN and take a scan, then post the MCA,. We can check calibration that way. It only takes a few minutes, until the 59.5 shows a peak.