Dear Nima,
the units of Fig.1 are weird. That can’t be a dN/dE as you have values power to the 11...
the scale on the Y of fig.2 is linear while the other one is logarithmic, I can’t compare the two just by looking at the picture, and in addition the bin-size represent a specific energy binning range. Could you plot MCNPX results in log scale and share it? The best would be to plot the same quantity in the same way (which might not be straightforward depending on what you simulated exactly). What about an “isolethargic” plot? [dPhi(E)/d(log E) vs. log E]
Best,
Vittorio
> On 14 Sep 2016, at 22:03, Nima Ghal-Eh <Nima.Ghal-Eh_at_fuw.edu.pl> wrote:
>
> Dear FLUKA experts,
>
> I would like to calculate the neutron fluence distribution in a 10-cm radius light water sphere when a 1-keV isotropic neutron source is located at the center. As you may see in Fig. 1 attached to this message, there is a peak at 0.001MeV of usrtrack spectrum as one may expect and then the spectrum represents an increasing behavior when going to lower energy region with a relatively large slope.
>
> My experience with tally F4 of MCNPX code (Fig. 2) says that the slope of the spectrum shouldn't be like the one seen in Fig. 1.
>
> Could you please kindly tell me how to interpret this difference?
>
> Best regards and looking forward to hearing from you.
>
> Nima.<Fig01.jpg><Fig02.jpg>
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Received on Thu Sep 15 2016 - 00:53:34 CEST