Dear Anton,
Thanks for your help!
After some research on fluka.org i use the Card Photonuc and i also
choose the Defaults: Precision.
Your Advice with the LAM-BIAS Card is very good, i read the informations
for the card but i´m not shure, which settings i should use form my
simulation. Could you help me with an advice?
Thank you for your help.
Konstantin, from GER
Am 10.12.2017 um 17:49 schrieb Anton Lechner:
> Dear Konstantin,
>
> As already pointed out in the Email below, you have to use the PHOTONUC card in order to activate photo-nuclear interactions. However, there is another issue with the DEFAULTS card: you are using SDUM=NEUTRONS which is only suitable for pure low-energy neutron simulations while electrons are not transported in this case (they are dumped at the spot). Rather use PRECISIO on the DEFAULTS card.
>
> Another important point to consider is that photo-nuclear interactions have small cross sections, so it is recommended to use the LAM-BIAS card for the target in order to bias the interaction length (see the PHOTONUC and LAM-BIAS description in the manual).
>
> Cheers, Anton
>
>
> ________________________________________
> From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] on behalf of Sébastien Wurth [wurth_at_ipno.in2p3.fr]
> Sent: 05 December 2017 11:49
> To: Konstantin Rönsch; fluka-discuss_at_fluka.org
> Subject: Re: [fluka-discuss]: Problem with neutron radiation and the Nuclear Photoeffect
>
> Hello Konstantin,
>
> Photonuclear reactions have to be turned on in FLUKA since they are not
> by default. See PHOTONUC and PHYSICS cards sections in the manual.
>
> Hope it helps.
>
> Best.
>
> Sebastien.
>
>
> Le 05/12/17 à 10:24, Konstantin Rönsch a écrit :
>> Dear Fluka and Flair experts,
>>
>> as a student at TU Ilmenau, Germany, I am currently working on the
>> simulation of a Linac-Head.
>> I want to shoot an 15 MeV electron-beam at a Tungsten-Copper target
>> and simulate the neutran radiation that occurs because of the Nuclear
>> Photoeffect.
>>
>> Unfortunately none of the different produced detectors detected a
>> neutron radiation,
>> even when I choose a high number of particals or a very high electron
>> energy.
>> I use the Fluka through the Flair Program and a VMBox.
>> Is it possible that Fluka does not take into consideration the Nuclear
>> Photoeffect,
>> or could anyone find a mistake with the Input-File?
>> I would be very thankful for any feedback or hint.
>> Yours sincerely,
>> Konstantin Rönsch,
>> TU Ilmenai, Biomedical Engineering.
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Received on Sun Dec 10 2017 - 20:37:38 CET