Gamma Spectrometry Forum

I have two beautiful Philips/Photonis XP2432 PMTs, and one small 2.75" dia x 0.75" thick chunk of BC-720, leaving one of my PMTs feeling lonely and left out. I have several hunks of BC-412 and BC-408 which would give me some gamma fun, but I'm in the market for fast neutrons. I've heard th...