[Gate-users] Too many randoms in PET NECR simulation

[Leo Read]

Dear Gate Users,

I'm simulating a noise-equivalent count rate curve in a PET scanner. The
general trends for Trues and Scatter events are good. However, the random
coincidences are increasing much more rapidly than what has been published
for this scanner. As one might expect, this leads to a much poorer peak
NECR than what is expected.

It seems this question has been asked multiple times on the forum, without
any responses [for example, Benedikt Rossboth asked a similar question on
2012-03-07 and Heesoon asked a question on 2013-11-26].

If somebody knows the reason why this might be happening, please share it
with the forum. Also, please let me know if you have any suggested
experiments to try for debugging purposes.

Cheers!
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