Re: How to simulate URANIUM 235?

From: vahan petrosyan <vahan4033_at_gmail.com>
Date: Fri, 11 Jan 2013 10:51:54 +0400

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Thanks for your Attentions!
I tried to implement Lucia's mentioned first method but as usual happens
to me I have problems:) I GET ALL ZEROES when plotting USRBIN plotes and
EMPTY data set for RESNUCLEI plot.

I attached my input file, If you can please take a look.

Thanks!

On 10.01.2013 23:04, Francesco Cerutti wrote:
>
> Hi,
>
> be careful:
>
> i. for alpha emitters, as already pointed out
> (http://www.fluka.org/web_archive/earchive/new-fluka-discuss/4853.html),
> the present FLUKA version does NOT generate at all decay alphas, but
> lets the isotope decay and transport only electromagnetic particles
> emitted along the decay chain.
>
> ii. no low energy (<20MeV) induced fission is explicitly simulated,
> since the multigroup treatment applies. This means that fission
> fragments are just separately sampled for residual nuclei scoring
> purposes, but they are not at all transported and the interaction of a
> given energy group neutron with a given material isotope yields, in
> terms of energy deposition, a fixed kerma value averaged over all the
> open reaction channels
>
> Happy New Year
>
> Francesco
>
> **************************************************
> Francesco Cerutti
> CERN-EN/STI
> CH-1211 Geneva 23
> Switzerland
> tel. ++41 22 7678962
> fax ++41 22 7668854
>
> On Thu, 10 Jan 2013, sarchia wrote:
>
>> Il 10/01/2013 13:47, vahan petrosyan ha scritto:
>>> Hi everyone! :)
>>>
>>> I have may be simple but for me important questions.
>>> How one can simulate URANIUM 235 decay?
>>>
>>> If I have 1gramm Uranium 235 what Dose it will produce. Is it possible
>>> to do by fluka?
>>>
>>> Or I should take fission fragments as primaries and do for each them
>>> separate simulation?
>>>
>>> Is it possible to define two separate beams in fluka in the same input?
>>> Thanks!
>>>
>>>
>>
>> Hi,
>>
>> URANIUM 235 is an alpha emitter and FLUKA can simulate its decay using
>> the BEAM card with ISOTOPE as SDUM; with HI-PROPE card you specify Z and
>> A of the element. Then you have to activate the decay mechanism through
>> the RADDECAY card (semi-analogue mode), and add a DCYSCORE card to
>> associate the decay and the scoring. Results will be given normalized
>> per one disintegration.
>>
>> U-235 does not go spontaneous fission, so in case you want to simulate
>> the fission process, in my opinion, you should define a neutron beam
>> impinging on a Uranium target.
>>
>> In general, you can use separate beams in one simulation using an
>> external source routine edited according to your needs.
>> I hope I have answered your questions.
>> Cheers,
>>
>> Lucia
>>
>>
>>

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Received on Fri Jan 11 2013 - 12:49:34 CET

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