Re: particle production

From: Francesco Cerutti <>
Date: Sat, 23 May 2009 23:36:44 +0200

Dear Nicolas,

as for your second point, double differential cross sections referring to
different angular intervals can be gotten by use of built-in scoring, i.e.
by different USRYIELD detectors asking for momentum as first quantity and
polar angle as second quantity (each USRYIELD allows only one scoring bin
for the second quantity). The (generalised) particle type to be scored has
to be specified. Note that asking for cross section (instead of yield) is
meaningful only in case of a thin target.
On the other hand, an event by event dump of the interaction products
requires to activate - by USERDUMP - and customize the USDRAW entry of the
mgdraw user routine. When ICODE=101, the properties (such as identity,
momentum and direction cosines) of the NP particles and NPHEAV fragments
generated in an inelastic hadronic reaction can be found in the GENSTK and
FHEAVY commons, respectively.

Best wishes


Francesco Cerutti
CH-1211 Geneva 23
tel. ++41 22 7678962
fax ++41 22 7668854

On Thu, 21 May 2009, Nicolas Abgrall wrote:

> Dear FLUKA experts and users,
> I would like to get particle yields in terms of momentum and LAB polar angle
> from the primary interaction of protons in a Carbon target.
> In particular, I would like to access:
> - particles pid, momentum, and polar angles on an event by event basis
> - produce predictions for double differential xsections just like those
> that were shown during the Athens workshop for the HARP experiment (see
> attachment).
> Basically I would like to know how to proceed.
> Is it possible to do this only via e.g. user dump, or do I have to write a
> user routine ?
> All the best,
> Nicolas.
> Nicolas Abgrall
> Département de Physique Nucléaire et Corpusculaire
> Université de Genève
> Office Unige: (022 37) 93457
> Office CERN: (022 76) 76541
Received on Sun May 24 2009 - 16:14:32 CEST

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