I have Adit PMT B29B01W and trying to find an information about correct voltage divider ratio for this tube. Datasheet does not have any information. I have used equal divider with R=10Meg and I have used non equal divider with ratio from the link below and R=10Meg or R=5Meg
https://michaellogusz.blogspot.com/sear ... %20B29B01W
The main issue that I have with the tube is eye-catching non-linearity of the spectrum. The pulse amplifier and high voltage are working perfectly and where tested many times with others detectors, it always +/- linear in the reasonable range. However with B29B01W I have second coefficient a^2 in BecqMoni2011 as 0.00064 that too large. Normally it should be in range of 0.00005 or less.
Any suggestions about the tube? Divider ratio?
Last setup was:
High voltage 500V-800V does not improve linearity.
Scintillation crystals, PMTs, voltage dividers etc...
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