Re: [fluka-discuss]: Re: Primary protons absorbed in a nuclear interaction vs elastic large angle scattered

From: Ferreira De Almeida Lourenco, Ana <am.lourenco_at_ucl.ac.uk>
Date: Tue, 3 Nov 2015 19:09:39 +0000

Hello All,

Thank you very much for this Francesco!
I couldn't find an ICODE variable for specifically nonelastic interactions. Does 101 accounts for nonelastic interactions as well?

Unfortunately, I am not familiar with the use of subrotines. From my understanding I need to use USERDUMP and link fluka with a modified version of mgdraw.f, where for my application I need to use the ENTRY USDRAW. Is this correct?

Also, how can I have information regarding the residual energy and angle of the protons that undergo an elastic nuclear interaction?

Many thanks,
Ana

________________________________________
De: Francesco Cerutti <Francesco.Cerutti_at_cern.ch>
Enviado: 3 de novembro de 2015 14:02
Para: Ferreira De Almeida Lourenco, Ana
Cc: fluka-discuss_at_fluka.org
Assunto: Re: [fluka-discuss]: Re: Primary protons absorbed in a nuclear interaction vs elastic large angle scattered

Hi Ana

> 1- Are particles from inelastic and nonelastic nuclear reactions considered
> as secondaries in FLUKA? Even the final state protons from inelastic and
> nonelastic reactions, right?

right

> 2- Final state protons from elastic nuclear reaction are considered as
> primaries, right?

right

> 3- I am interested to analyse the fraction of protons that undergo an
> elastic nuclear interaction. And I believe these protons will be included in
> BEAMPART, where some have suffered electromagnetic interactions and others
> elastic nuclear reactions. Is this right? If so, how can I distinguish them?

right.
You can intercept nuclear elastic scattering products in MGDRAW/USDRAW,
applying to ICODE=100 what Anton discussed below

Best

Francesco

> On the other hand, one could also count manually the collisions in the
> USDRAW entry of the MGDRAW routine, which is called after each interaction.
> This is maybe more bothersome than the above approach, but allows to access
> additional information (like the position, secondaries produced etc.). With
> following code snippet you could filter out the events which are inelastic
> collisions of primaries (using the generation number LTRACK, which is 1 for
> primaries and making use of the ICODE variable, which is 101 for inelastic
> nuclear collisions):
>
> * Inelastic collision of a primary particle
> IF ( LTRACK .EQ. 1 .AND. ICODE .EQ. 101 ) THEN
>
> * Writing position of inelastic collisions
> WRITE( 98,* ) "Inelastic coll at", XSCO, YSCO, ZSCO
> END IF
>
> Cheers, Anton
>
>
> ____________________________________________________________________________
> From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] on
> behalf of Ferreira De Almeida Lourenco, Ana [am.lourenco_at_ucl.ac.uk]
> Sent: 07 October 2015 17:57
> To: fluka-discuss_at_fluka.org
> Subject: [fluka-discuss]: Primary protons absorbed in a nuclear interaction
> vs elastic large angle scattered
>
> Dear Fluka experts,
>
>
> I am studying the number of primary protons that are removed from a proton
> beam. For that, I would like to distinguish between the protons that are
> absorbed in a nuclear interaction from the ones that are elastic large angle
> scattered. How can I get this information from FLUKA?
>
>
> Many thanks,
>
> Ana
>
>
>

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Received on Tue Nov 03 2015 - 21:38:40 CET

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