Re: [fluka-discuss]: Discrepancy between total particle fluence and EM-ENERGY

From: Rasha Abbasi <rasha_at_cosmic.utah.edu>
Date: Thu, 11 Jul 2019 10:09:21 -0600

Please remove my name from list.
Thanks.

> On Jul 11, 2019, at 7:21 AM, Primidis, Thomas <Thomas.Primidis_at_liverpool.ac.uk> wrote:
>
> Dear all,
> I am having the following unexpected result with the attached input file.
>
> When I am firing 60keV electrons on a 2.5um Gold target and I am scoring the electron, photon and energy fluence that exits on the other side, I would expect the EM-ENERGY spectrum to have the same shape as the ALL-PART spectrum. I expect this because all particles in the simulation would be either electrons or photons so particle fluence spectrum should have the same shape as em-energy fluence spectrum. However, the two spectra shapes have significant differences between them as seen in the image attached. The spikes are high error values.
>
> In the image, the results are taken with different EMFFIX values and are arranged column wise in the order: 0.001,0.002,0.005,0.01,0.02,0.05,0.1,0.2. The horizontal axis is the energy in keV and the vertical axis is the integrated over solid angle particle&energy fluence normalised to their respective maximum values.
>
> What is the reason for this difference?
> I would be very interested in knowing that because the goal of this simulation was to find the optimum maximum step length given that the geometry is very small and results are confusing.
>
> Best regards,
> Thomas Primidis
> <discrepancies.png><SourceNewSci60.inp>



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Received on Thu Jul 11 2019 - 19:16:35 CEST

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