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

From: Ferreira De Almeida Lourenco, Ana <>
Date: Tue, 17 Nov 2015 16:44:01 +0000

Dear All,

Thank you very much for all your help! All makes sense!

Many, many thanks,

De: Francesco Cerutti <>
Enviado: 16 de novembro de 2015 20:41
Para: Ferreira De Almeida Lourenco, Ana
Cc: Mikhail Polkovnikov <Михаил Полковников>;
Assunto: Re: [fluka-discuss]: Re: Primary protons absorbed in a nuclear interaction vs elastic large angle scattered

Hi Ana

complementing Mikhail's answer, which already hit the main point, the
proton mass is more precisely 938.27231 MeV, as given by the AMPRTN
parameter in $FLUPRO/flukapro/\(DBLPRC\).

Concerning ICODE = 101 in mgdraw, it refers to any non-elastic nuclear
reaction, including what you previously indicated as inelastic, which in
that meaning is just a specific subset of non-elastic channels. Note
however that often in real life inelastic is used (as in the USDRAW
header) as synonym of non-elastic, and not in the restricted meaning you



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

On Mon, 16 Nov 2015, Ferreira De Almeida Lourenco, Ana wrote:

> Dear Mikhail and All,
> Many thanks for your e-mail and for the example of the mgdraw.f subrotine!
> Regarding the mgdraw subroutine I still have some questions:
> 1- When using Icode = 101, does it include non-elastic nuclear interactions as well? If not, what is the Icode that I should use for non-elastic nuclear interactions?
> 2- What are the units of ETRACK? I'm simulating a 200 MeV proton beam on a carbon target, and scoring the energy from inelastic interactions. The file "carbon_200001_fort.98" is an example of my output file and the energy of the particles that undergo an inelastic interaction is about 1 GeV which does not make sense since my projectile has a maximum energy of 200 MeV.
> Many thanks,
> Ana
> ________________________________________
> De: <> em nome de Mikhail Polkovnikov <Михаил Полковников> <>
> Enviado: 5 de novembro de 2015 03:17
> Para:
> Assunto: [fluka-discuss]: Re: Primary protons absorbed in a nuclear interaction vs elastic large angle scattered
> Dear Ana,
>> 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?
> Correct.
> USERDUMP should look like:
> *...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....
> USERDUMP 100. 98. 2. 1. dump
>> Also, how can I have information regarding the residual energy and angle of the protons that undergo an elastic nuclear interaction?
> Look at the (TRACKR) header file, it stores current track parameters as:
> energy, directions etc.
> In attachment USDRAW writes interaction events in the TARGET region.
> Best regards.

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Received on Tue Nov 17 2015 - 19:17:18 CET

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