Re: [fluka-discuss]: Neutron reaction in Lithium-6

From: Alessandro Calamida <alex.calamida2_at_tiscalinet.it>
Date: Mon, 1 Mar 2021 16:19:14 +0100

Dear Paola,

I tried to activate the transport of tritium and alpha but if I tried to
score the alpha with an usrtrack inside the Li6F, I still do not find
anything. Am I making something wrong? I attach the input file to this
email.

Best regards, Alessandro Calamida.

Il 01/03/2021 08:44, Paola Sala ha scritto:
> Dear Alessandro,
> the point is not on transport, it is on production. For almost all
> materials in Fluka are trasported wit group-wise cross section and the
> charged interaction products are not produced at all, the corresponding
> energy is deposited at the point of interaction. A better description is
> available for a few isotopes, including 6-Li.
>
> As Ricardo wrote, you have to change the definition of the lithium
> material, using a specific name so that the code knows that it has to use
> pointwise cross sections for it and produce the charged particles. ( see
> note 5 to the LOW-NEUT card in the manual)
> Regards
> Paola
>> Dear Riccardo,
>>
>> I understood that tritium and helium-4 where not transported. In fact,
>> if I use the usertrack I find no trace of the two particles. How I can
>> activate their transport?
>>
>> For the results of the RESNUCLEi card, now I understand them. It gives
>> nucleus/cm^3, so the propability that a neutron triggers the reaction.
>>
>> Berst regards, Alessandro Calamida.
>>
>> Il 27/02/2021 06:10, Ricardo Manuel Dos Santos Augusto ha scritto:
>>> Dear Alessandro,
>>>
>>> When you say 'I have read that the alpha particles and the tritium
>>> produced are not transported by FLUKA.' This is incorrect. Li-6 is one
>>> of the few isotopes for which pointwise neutron transport can be
>>> activated and you can get the alphas and tritons to be transported.
>>>
>>> One does need to define the Li-6 with a special name (note 5 to the
>>> LOW-NEUT card in the manual):
>>> MATERIAL 3. 0.534
>>> 6.LITHIU-6
>>> Note that your IONTRANS definition is not needed with PRECISIO
>>>
>>> Also, you probably misunderstood the meaning of the WHAT(3,4) in the
>>> RESNUCLEi, you can leave those blank for your purposes.
>>>
>>> Best regards,
>>> Ricardo
>>>
>>>
>>> //Ricardo dos Santos Augusto
>>> TRIUMF-EH&S
>>> Office: +1 604 222 10 47 (6375)
>>> 4004 Wesbrook Mall,
>>> Vancouver, BC V6T 2A3, Canada//
>>> ________________________________________
>>> De : owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] de
>>> la part de Alessandro Calamida [alex.calamida2_at_tiscalinet.it]
>>> Envoyé : lundi 22 février 2021 14:01
>>> À : fluka-discuss_at_fluka.org
>>> Objet : [fluka-discuss]: Neutron reaction in Lithium-6
>>>
>>> Dear FLUKA experts,
>>>
>>> I have to estimate the neutron-alpha rection rate in lithium-6. I have
>>> read that the alpha particles and the tritium produced are not
>>> transported by FLUKA. Hower, they can be scored using the RESNUCLEi
>>> card. I tried but I do not understand the results shown. Putting no data
>>> in the Z and A option I find two results at Z=0.5 and Z=1.5. Instead,
>>> choosing Z=1 and A=4 I obtaine 0. Why this happens? Am I using the right
>>> physics card?
>>>
>>> I attached the input file at the email.
>>>
>>> Best regards and thank you for your time, Alessandro Calamida.
>>>
>>>
>>>
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>>
>
> Paola Sala
> INFN Milano
> tel. Milano +39-0250317374
> tel. CERN +41-227679148
>


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Received on Mon Mar 01 2021 - 18:19:55 CET

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