Re: Problem with Compound/Material card

Hi Ruan

Your detector for the case with air shows only a non-zero fluence entry in
one bin (the one which contains the beam energy)

   50.14544 +/- 0.000000 % 0.000000 +/- 0.000000 %

(if you run more particles you will also get entries at other energies)

Note that the table following the differenial fluence is cumulative
fluence, thus, values have to be identical since you add only zeros..

Does this answer your question?

Cheers
Stefan

On Mon, 20 Oct 2008, Steyn, Ruan <14593742_at_sun.ac.za> wrote:

>
> Hi Fluka users
>
> Someone detected a problem with the attached files of the previous =
> Thus I am sending the same message to you.
>
> Thanks
> Ruan
>
> Previous e-mail:
>
> Hi Fluka experts
>
> My question is related to the MATERIAL/COMPOUND card.
>
> In my example_mod.inp (attached) file - I made changes to the example
> file (the one that comes with the fluka package).
>
> The changes that I made was: Target from BERYLLIC to AIR.
> Beam from a Proton to Neutron and inserted the DEFAULT card for NEUTRONS
>
> Energy from 50GeV to 2 MeV
>
> I then compared the output file (fort 47 - Flux) of these 2 cases
>
> MATERIAL 4.0 9.0122 1.848 5.0 BERYLLIU
> ASSIGNMAT BERYLLIU regBE3 regBE4
> MATERIAL 0.001225 26.0 AIR
> COMPOUND -0.0009256 7.0-0.0002837 8.0-0.0000157 18.AIR
> ASSIGNMAT 26.0 regBE3 regBE4
>
>
> I have attached the sum.lis file's for both these cases. For the first
> case the name is beryllic_target_sum.lis and for the second one
> with_air_sum.lis=20
>
> As you will see the output file look very differnent, as should be
> expected. But the strange thing is that in the case of the air target
> (with_air_sum.lis )the detector detected the same flux for all the
> differnent bins. Can someone please explain this to me? Is there maybe
> something wrong with my MATERIAL/COMPOUND card?
>
> Thanks
>
> Ruan
>
>

-- 
___________________________________
Stefan Roesler
CERN, SC/RP
CH-1211 Geneva 23
Switzerland
Phone:  +41-22-7679891
Fax:    +41-22-7669639
E-mail: Stefan.Roesler_at_cern.ch