Date: Mon, 25 Jan 2021 14:39:49 +0100
Dear Fluka expert,
I am running simulations for a 1 KeV antiproton beam which annihilates on a
carbon target with a 2 micron width. The residuals of the annihilations
pass through a 0.5 mm silicon detector 1 cm behind the target. I am using
default PRECISIO, physics EVAPORAT and EMFCUT for photon and electron
transport (see input file attached).
I am dumping energy depositions on the detector by every particle entering
into it with mgdraw subroutine (attached as well).
As the subject suggests, I am noticing a strange pick in the energy
deposition of gammas. I attached a screenshot of the distribution for the
energy deposition of gammas (energy in GeV on the x axis, on y axis the
number of recurrence of photon depositions in the dump file, I have only
one step inside the detector for each gamma the number of recurrence is
equal to the number of photon per energy bin).
I am puzzled by the pick at 100 KeV. What could be the cause of that pick?
By comparison with simulations done with geant4 I am wondering if I am
doing everything correctly because in other simulations I do not even have
gammas with that energy.
Thank you in advance for your help.
Bests regards,
Giovanni Costantini
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(image/png attachment: pick.png)
- application/octet-stream attachment: tm.inp
- application/octet-stream attachment: mymgdraw.f