Date: Fri, 12 Jul 2019 10:07:16 +0200
Dear Francesco,
your input file looks fine, but I send you a revised version that
contains a few adjustements the should put you in the right direction.
A few comments:
- Fluka provides a set of well designed and optimized
scorers, far more powerful than ascii EVENTBIN (which by the
way would require extra work for post-processing the reults
to produce a plot): I suggest you to try the DETECT card,
as in the example I send you;
- your e-/e+ production threshold (1 MeV) with EMFCUT was to high
to reproduce the multiple Compton part of the spectrum:
I reduced it to 1 keV;
- consequently, the FUDGEM parameter is set to 0 to
correctly take into account the atomic electrons;
The result is the attached spectrum which is automatically
processed and plotted by Flair. If I am not mistaken, one
can recognize the 661.6 keV line from Ba-137m, the 625.67 keV
from internal conversion and the 32.19 keV line from the K_alpha
X ray.
Hopefully this helps: you could try to simplify the problem
by using a single element material or a different geometry.
Do not forget that Fluka gives you the ideal lines, i.e.
witout any detector effect like finite resolution or efficiency:
so lines will never be broadened in case you put a NaI detector,
for example. These effects must be further simulated by including
for example a Gaussian smearing of the line as detector response:
in Fluka you can do it in the MGDRAW routine.
Kind regards and ciao,
Andrea
On 11/07/2019 19:23, Pierfrancesco Ulpiani wrote:
>
> Dear Fluka Experts and Users,
>
> I would like to reproduce an experimental energy spectrum of different
> radioactive sources (i.e Cs, Na).
> I tried to use the card BEAM with sdum=ISOTOPE together with the
> mandatory cards (hi-prope,raddecay...) but it doesn't reproduce the
> expected spectra. Attached the input file where I tried to simulate
> the Cs energy spectrum (the detector is just an RPP).
> May you help me to find out were I am wrong?
>
> Thank you all
> Pierfrancesco
>
-- ======================================================================== Dr. Andrea Fontana tel: +39 0382 987991 Istituto Nazionale fax: +39 0382 423241 di Fisica Nucleare Sezione di Pavia e-mail: andrea.fontana_at_pv.infn.it Via Bassi 6 web : www.pv.infn.it/~fontana 27100 PAVIA, Italy ========================================================================
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- text/plain attachment: cesio_isotope.inp
(image/png attachment: cesio_isotope_17_plot.png)