Hi Emilio,
as already mentioned from Mario back in November, this number might be
underestimated for different reasons. You could also more easily score the
*neu-bala* with a USRBIN (per region scored at point) which will give you
in this case directly the neutron balance for the region.
In your case about 11% of the secondaries generated in the inelastic
interaction are be Deuterons which are not handled by FLUKA at such low
energies.
Not sure if this is sufficient to explain a 30% mismatch....
Best,
Vittorio
On Tue, Apr 26, 2016 at 3:30 PM, Emilio Ciuffoli <emilio_at_impcas.ac.cn>
wrote:
> Dear FLUKA experts,
>
> I am studying the neutron yield from a Be target hitten by a proton beam.
>
> I am trying to reproduce the experimental results reported in this paper:
> http://arxiv.org/pdf/1302.7226.pdf
>
> They used a cylindrical target (diameter: 3.5 cm, lenght: 3 cm) and 62 MeV
> proton beam, they reported a neutron/proton ratio of 9.87% +/- 0.53%
> (syst). However from my simulation I obtain a neutron yield of only 6.88%
> +/- 0.002% (stat).
>
> Could you please take a look at my input card and tell me if I made some
> mystake? Please find in the attached files also the output of the USRYIELD
> card I used to score the neutron yield
>
> Thank you very much for your help
> Best Regards
> Emilio Ciuffoli
>
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Received on Wed Apr 27 2016 - 02:30:16 CEST