[Gate-users] Low and Standard energy processes inGatev6.0.0

[Marta.Lai at ca.infn.it]

hi all,

I'm trying to simulate a PET that uses LYSO crystal for detecting photons
becoming from a Na22 point-like source. I set the Low-energy physics
process (PhotoEl and Compton) and I've obtained a low rate of coincidence
(1,7 kHz). I've added the standard processes (Photoelectric and Compton)
and the rate of coincidences is now 2,7 kHz. This behavior is very strange
because I expect that the rate is the same and everyone is running the
same simulation with a previous release is using only the low energy
processes and the rate is correct (higher than 1,7 kHz).

is there someone who have tried to use the version 6.0.0 ?
The processes setting is very changed compared with version 5 and
previouses but there isn't an explanation in the guide.

Thanks, Marta