Re: FW: changing cross section values

From: Stefan Roesler <>
Date: Tue, 30 Nov 2010 11:29:09 +0100

Dear Makis

FLUKA is not using the EPAX or any other parametrization of fragmentation
cross sections.

The production of individual fragments in a heavy ion collision is
directly predicted by the FLUKA interaction models. Thus, the cross
section follows from the probability that the model produces a certain
fragment and the inelastic interaction cross section. The latter are based
on parametrized predictions by DPMJET-III at high energy and a modified
universal parametrizations by R.Tripathi et al (NASA Technical Report
3621, 1997). Details can be found in

V.Andersen et al, The FLUKA code for space applications: recent
developments, Advances in Space Research 34 (2004) 1302

Therefore, the fragmentation cross sections are FLUKA predictions and
cannot be modified by the user.


> -----Original Message-----
> From: [] On Behalf Of Chrysostomos Valderanis
> Sent: 26 November 2010 20:17
> To:
> Subject: changing cross section values
> Hello,
> I would like to know if Fluka is using the EPAX parametrization for ion
> cross sections. IF it is using something else could you point me to it?
> Another question is the following. Assuming that I would like to change
> some values for specific cross sections, is there an easy way to do it?
> thank you in advance,
> Makis
Received on Wed Dec 01 2010 - 14:59:26 CET

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