Dear Helmut,
those huge values, irrespective of their ratios, simply mean that elastic
scattering does not take place in any material for ions, since it is not
implemented
Cheers
Francesco
**************************************************
Francesco Cerutti
CERN-EN/STI
CH-1211 Geneva 23
Switzerland
tel. ++41 22 7678962
fax ++41 22 7668854
On Mon, 12 Jul 2010, Helmut Vincke wrote:
> Dear FLUKA experts
>
> Looking at the FLUKA output of a Carbon-12 ion run (400 MeV/nuc) I find
> the information listed below about scattering lengths. The elastic
> scattering length values appear very high to me (1E30 cm). It looks
> similar to the value FLUKA is reporting for vacuum. The table tells me
> even that vacuum has a shorter elastic scattering length than
> hydrogen!?!?!?!?!
> I guess there is a simple explanation for that. I would be grateful if
> one of you could advice me on that.
> Thanks in advance.
>
> Best regards
> Helmut
>
>
> Material Atomic Atomic Density Inelastic Elastic Radiation Inelastic
> Number&Name Number Weight Scattering Scattering Length Scattering
> Length for Length for Length for
>
> 2 VACUUM 0.000 0.000 0.000 0.1000E+31 0.1000E+31 0.1000E+31 0.1000E+31
> 3 HYDROGEN 1.000 1.008 0.8370E-04 0.8589E+05 0.1195E+35 0.7532E+06 0.6523E+09
> 6 CARBON 6.000 12.01 2.000 12.91 0.5000E+30 21.35 18.23
> 32 WATER 3.333 6.005 1.000 21.88 0.1000E+31 36.08 45.12
> 33 CO 7.000 14.01 1.000 27.78 0.1000E+31 37.42 38.44
> 34 CO2 7.333 14.67 1.000 28.37 0.1000E+31 36.20 39.02
> 35 CH4 2.000 3.208 1.000 15.63 0.1000E+31 46.47 48.70
>
>
>
Received on Tue Jul 13 2010 - 13:54:30 CEST
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