Re: [fluka-discuss]: Problem with using liquid argon as a material

From: Anna Ferrari <a.ferrari_at_hzdr.de>
Date: Fri, 27 Dec 2013 11:57:46 +0100

Hello!

I would like to add a comment: you can define the liquid argon as LIQARGON
(with the MATERIAL card, where you can also input the right argon density),
the essential thing is that you associate to this material the correct low
energy neutron cross sections via the LOW-MAT card (as Sunil wrote). Consider
that if you use the name ARGON without using the LOW-MAT card FLUKA will take
(somebody can correct me) the first ARGON material in the list 10.4.1.2, which
is natural argon at 296K (I think you should prefere the available data set at
87K).

Best regards,
Anna


Am Fri, 27 Dec 2013 08:54:27 +0530 schrieb Sunil C <csunil11_at_gmail.com>:
> Hi
>
> You have to define argon as ARGON and not as LIQARGON.
> Please see the the table "10.4.1.2} List of materials for which cross
> sections are available in the 260 neutron, 42 gamma group library:" at
> http://www.fluka.org/fluka.php?id=man_onl&sub=96
> You can use the low-mat card to set a correspondence with the available
> cross sections to the material defined by you, if it is not listed.. Please
> see
> http://www.fluka.org/fluka.php?id=man_onl&sub=48
>
> Best
> Sunil
>
>
> On Fri, Dec 27, 2013 at 1:56 AM, APTE RUTURAJ VINAY <ruturaj.iitb_at_iitb.ac.in
>> wrote:
>
>> Hello,
>>
>> I am a fluka beginner. I want to create a geometry in which 2 concentric
>> cylinders are sitting in liquid argon. But since the low energy neutron
>> cross-section data is not available for it, the output file is giving an
>> error as :
>>
>> **** Low energy neutron xsec not found for some media 3
>> 4 ****
>> LIQARGON
>>
>> I tried changing the density of predefined argon using CORRFACT to make it
>> liquid but it does not allow change of density by more than a factor of
>> 3/2 apparently. Can anyone help me?
>>
>> Regards,
>> Ruturaj
>>
>>

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dr. Anna Ferrari
Institute of Radiation Physics
Helmholtz-Zentrum Dresden-Rossendorf e.V.
Bautzner Landstra├če 400
D - 01328 Dresden (Germany)
Tel. +49 351 260 2872
Received on Fri Dec 27 2013 - 13:28:55 CET

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