Re: Neutron Flux

Dear Adam,
With your input file you are looking ONLY to the neutrons produced
in a very small forward angle. You score on a 2x2 cm area at 4 metres,
that means 5 mrad. Is this what you want?
If, instead, you wish to score the total flux, you should use a spherical
surface surrounding your target.
If you wish to score neutron flux at different emission angles you can use
the USRYIELD estimators on the target surface. In this case, to get
spectra at different angles you should use one USRYIELd structure for each
angular interval.

In any case, I suggest to bias the interaction probability of the protons,
using the LAM-BIAS card.
Greetings
Paola
> Dear FLUKA user,
>
> I would like to calculate the neutron flux produced from the interaction
> of 200 MeV (kinetic energy) proton beam with a thin target of Be-9
> (1.2cm). The flux calculation is made at 4m from the target (attach the
> input file), my problem is I am not sure of my input file, however, in
> the results I obtained I couldn't find any explanation, so maybe there is
> a problem with the input file? Any help please.
>
>
> Kind Regards,
> Buthaina Adam
>
>

Paola Sala
INFN Milano
tel. Milano +39-0250317374
tel. CERN +41-227679148
Received on Mon May 5 11:28:47 2008