Dear Francesco,
Thank you very much for your answer.
So if i understand well, BME simulates the pre equilibrium emission of reaction in the domaine of several representative systems :
16O + 6Li, 8Li, 8B, 10B, 12C, 14N, 16O, 19F, 20Ne, 24Mg, 27Al, 56Fe, 197Au
12C + 8Li, 8B, 12C, 27Al, 40Ca
_at_ 12, 30, 50, 70, 100 MeV/n
But in the case of reaction not from theses systems : 238U+238U for example. How does FLUKA simulate the pre equilibrium emission ? Is it an extrapolation of fitting functions from theses systems ?
Thank you so much for clearing me out.
Sincerely,
Trinh, GANIL, France.
________________________________________
De : Francesco Cerutti [Francesco.Cerutti_at_cern.ch]
Envoyé : lundi 7 mars 2016 09:32
À : Trinh Ngoc-Duy
Cc : fluka-discuss_at_fluka.org
Objet : Re: [fluka-discuss]: Pre-equilibirium emission of low energy heavy ion reaction in FLUKA
Dear Trinh,
heavy ion reactions have a specific treatment in FLUKA and at low energies
are indeed handled by the BME event generator. Below 20 MeV/A you get a
significant chance for complete fusion, and pre-equilibrium emissions,
before evaporation/fragmentation/fission, in the present release are
performed only for systems falling in the domain covered by the
precomputed database.
On the other hand, for single hadron induced reactions - which are
another thing -, FLUKA has its own implementation based on the exciton
model and on the Veselski recipe for pre-equilibrium termination. But this
does not apply to your case.
Best regards
Francesco Cerutti
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On Fri, 4 Mar 2016, Trinh Ngoc-Duy wrote:
>
> Dear FLUKA experts,
>
>
>
> I'm studying the double differential (energy, angle) spectra of particle
> from heavy ion reaction at low energy beam (<20 MeV/u).
>
>
>
> I read in this presentation that FLUKA uses the Veselski model to calculate
> the probability of pre-equilibrium emission of particle from reaction (page
> 15).
>
>
>
> http://pro.ganil-spiral2.eu/events/seminars/files/ceruttiganil.pdf
>
>
>
> I put the article of this model in attached file.
>
>
>
> When I’m studying this article, I see that Veselski model is initially
> developed for nucleus-nucleus reaction at Fermi energy range (20 MeV/A - 100
> MeV/A) and Veselski mentioned the limit of his model for the low energy
> heavy ion beam (<20 MeV/A).
>
>
>
> Otherwise, i see that FLUKA uses BME model to simulate the reaction of ion <
> 100 MeV/A and this model is parameterized for the pre-equilibrium emission.
>
>
>
> Hence, i would like to know how FLUKA treats the pre-equilibrium emission of
> particle produced by low energy beam. How Veselski and BME model are used in
> this energy range ?
>
>
>
> Thank you very much for your answer.
>
>
>
> Trinh, GANIL, France.
>
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Received on Mon Mar 07 2016 - 12:10:03 CET