Re: [fluka-discuss]: Natural uranium as material

From: <Vegard.Gjerde_at_student.uib.no>
Date: Sat, 28 Jun 2014 12:07:10 +0200

Dear Andrea (and other Fluka users),

Thanks for the answer!

Why do I need to use LAM-BIAS? The results does seem reasonable when
having a 2 microns uranium target, although I am thinking of taking
this down to 1 micron.

I am interested in what comes out of the thin uranium region. It is
just meant as a converter material. And if I use LAM-BIAS, what
consequences will it have?

Best,
Vegard Gjerde



Quoting Andrea.Mairani_at_mi.infn.it:

> Dear User,
> About the definition of natural Uranium, you could do for example:
> MATERIAL 92.0 235.0439 18.95 235.0 235-U
> MATERIAL 92.0 238.0508 18.95 238.0 238-U
> MATERIAL 18.95 URANIUM (remember to define the density of your new material)
> COMPOUND -0.0072 235-U -0.9928 238-U URANIUM
>
> in this way the materials 235-U and 238-U are automatically recognized for
> what concerns the low energy neutrons.
> If you will have thin layer of Uranium probably you will need the LAM-BIAS
> card http://www.fluka.org/fluka.php?id=man_onl&sub=45 to perform a biasing
> of the inelastic hadronic interaction length.
>
> Cheers,
> Andrea
>
>
>
>> Dear Fluka users,
>>
>> I want to have a material which is 99.28% U238 and 0.72% U235. I want
>> to use a proton beam to create fission products in a thin uranium
>> "slice". I tried doing it like this:
>>
>> *...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....
>> MATERIAL 92. 235. 18.95 U235
>> MATERIAL 92. 238. 18.95 U238
>> COMPOUND -0.9928 U238 -0.0072 U235
>> URANIUM
>> LOW-MAT U238 92. 238. 296.
>> 238-U
>> LOW-MAT U235 92. 235. 296.
>> 235-U
>> ASSIGNMA URANIUM CONVERT
>>
>>
>>
>> Will this work? Any better way to do it?
>>
>>
>> Best regards,
>> Vegard Gjerde
>>
>
>
>
Received on Sat Jun 28 2014 - 13:13:07 CEST

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