Dear Alessandro,
Your USRTRACK detector was missing the region. Without it the code does not know where to calculate the particle fluence.
Regarding your use of USRBDX, note that the alphas will not travel that far to cross the boundary.
Hope it helps,
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 : Alessandro Calamida [alex.calamida2_at_tiscalinet.it]
Envoyé : lundi 1 mars 2021 16:19
À : paola.sala_at_mi.infn.it
Cc : Ricardo Manuel Dos Santos Augusto; fluka-discuss_at_fluka.org
Objet : Re: [fluka-discuss]: Neutron reaction in Lithium-6
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 Sun Mar 07 2021 - 21:26:44 CET