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 - 10:48:07 CET