[fluka-discuss]: Difference between FLUKA and NIST Unrestricted Electron Stopping Powers

From: Daniela Botnariuc <daniela.botnariuc_at_npl.co.uk>
Date: Thu, 21 Mar 2019 15:36:30 +0000

Dear FLUKA experts,

I am simulating a proton beam in a water region where I am also considering secondary particles, including electrons. My goal is to print out the electron stopping power used by FLUKA and for that I activated the PRINT option in the EMFFIX card. To make sure I am getting unrestricted electron stopping powers, I set the DELTRARAY production threshold to infinite, so there is no delta ray production.

I compared the stopping power values printed in the output file to the NIST unrestricted stopping powers and I find a large discrepancy as you can see in the figures below.

Could someone explain why are these values so different? Am I simulating it wrong?
I have been trying to understand this for some time and I would really appreciate any help.

Best wishes,



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Received on Thu Mar 21 2019 - 18:06:32 CET

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