[fluka-discuss]: Score monoenergetic electrons and removing photons for source calculation

From: Thomas Frosio <thomas.frosio_at_cern.ch>
Date: Wed, 6 Sep 2017 14:04:32 +0000

Dear FLUKA expert,

I am with the volonty to compute E+/E- fluences related to a source in my geometry.
In radioactive sources:
1 - Electrons/positrons can be produced directly by the source, continuously with the spectrum or discretly by internal conversion or Auger,
2 - Photons are emitted and interact with the environment outside the source, giving movement to electrons.
I would like to remove electrons produced by process 2 and I want to keep Auger electrons and internal conversion electrons.

My question concerns how are Auger and Internal Conversion simulated in the code:
If I add an EMFCUT card, putting for example a threshold of 10TeV for photons in all my geometry, will Auger and IC electrons be simulated?
In other terms, simulation of monoenergetic electrons in Fluka is linked with photon simulation or is there a description of probabililty to emit monoenergetic electrons directly in the source data?


I have a second question.
I made a simple input with a source of Tb156 cutting photons everywhere in the geometry until 10TeV.
This source is inside vacuum. And this vacuum is in air.
I used USRBDX score to check there is no photon passing from vacuum to air.
Unfortunately, I observe a photon fluence.
But if I replace vacuum by air, there is no fluence.
Is there a reason for this ?
The input is attached with the photon fluence.


I thank you for your answer,
Best regards,
Thomas Frosio





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Received on Wed Sep 06 2017 - 17:26:20 CEST

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