Dear Georgios
I see that your beam is directed towards the positive Z, while your Co is
somewhere in the -Y half. Thus the beam is not going anywhere near your
cobalt. If you plot a USRBIN data containing the beam particles, you can
see that this is indeed the case. I have attached such a plot. The
difference in your 2 plots or the numbers you report do not seem to be
very much and I suspect is due to statistical fluctuations. With 14-18%
uncertainty, I will be very cautious with any conclusion.
Change your beam direction to point towards the -Y region and try.
Cheers Sunil
On Fri, Apr 10, 2015 at 4:19 PM, Georgios Tsiledakis <
Georgios.Tsiledakis_at_cern.ch> wrote:
> Dear fluka experts,
>
> I have a cylinder of H2O and a beam of thermal neutrons that hits on it...
> Inside the water cylinder there is a small thin box made of Cobalt
> (target) which
> is next to a Germanium cylinder...
> Using USRBDX scoring -one way- , I would like to demonstrate that the flux
> of neutrons from H20
> that hit the Cobalt target is smaller with the presence of the germanium
> cylinder.
>
> But the results as you can see at the attached picture are the opposite...
>
> Why is that?
>
> Is any other way to conclude concerning the effect of Ge in the neutron
> flux on the Co target?
>
> Thanks a lot in advance
>
> Best regards
>
> Georgios
>
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Received on Mon Apr 13 2015 - 09:25:27 CEST