Hello Monica,
This routine samples a neutron source, so you should set SDUM of BEAM to
NEUTRON.
As far as I know, ISOTOPE is only implemented for beta (+ associated
gamma) emission, not for spontaneous fission nor alpha emission.
The activity of your source has to be defined as a normalization factor
as you plot your USRBIN results.
Best regards.
Sébastien.
Le 2016-01-14 16:14, Monica Huerta a écrit :
> Dear fluka users,
>
> I am trying to simulate a simple isotropic Cf-252 source surrounded
> by air. Since I want to work with the e_mission of alphas and
> spontaneous fission__, _I have used an user routine posted by Alberto
> Fasso in November 2009 and changed
>
> * Cosines (tx,ty,tz)
> TXFLK (NPFLKA) = UBEAM
> TYFLK (NPFLKA) = VBEAM
> TZFLK (NPFLKA) = WBEAM
>
> to:
>
> * Cosines (tx,ty,tz)
> CALL RACO( TXX, TYY, TZZ )
> TXFLK (NPFLKA) = TXX
> TYFLK (NPFLKA) = TYY
> TZFLK (NPFLKA) = TZZ
>
> to make it isotropic.
>
> Firstly, I would like to check the neutron flux that I will be
> getting at a precise distance and using different moderators (with
> different thicknesses). I have attached my inp.
>
> My main doubt is how to define the particle in the BEAM datacard,
> should I use NEUTRONS? or ISOTOPE? Or etc. Moreover, should the
> activity of the source be defined as a normalization factor? Or
> somewhere else?
>
> Any comments will be appreciated.
>
> Thank you for your time and help.
>
> Best wishes
>
> Monica
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Received on Thu Jan 14 2016 - 22:21:43 CET