Hello Teterev,
please read the answer that Mario Santana gave to you!
(1) the quantities you calculate -which depend on the prompt radiation- are
normalized "per primary neutron". In the FLUKA input you don't need to specify
the intensity of the neutron source. ....remember that you are doing an
integration (and your precision depends on your statistics). You have just to
normalize the result.
(2) I'm confused about your numbers. Why do you say that you have
10^10-10^11 helium-6 from the (n,alpha) reactions? How did you get this
result? I ran your input and I looked at the RESNUCLEi output: you get a
reasonable 6.78E-2 (+- 1.5% with the poor statistics I used), you have just to
multiply this value for 10⁸ n/s.
I add that you have to specify the primaries/s, and in case a complex
irradiation profile (via the card IRRPROFI), only if you do an analysis of the
residual radiation, i.e. the radiation due to the activated materials. But
this is not your case. If you want to know more about it, please look for
example at this lecture:
https://www.fluka.org/free_download/course/dresden2013/Lectures/17_Activation_1013.pdf
(maybe you were a bit confused about that, I saw that you used a RADDECAY
card that seems to me not needed)
Hope this helps,
Anna
Am Sun, 23 Aug 2015 21:12:02 +0300 schrieb teterev <teterev_at_jinr.ru>:
>
> Hello! I think we do not understand each other. I do not need to consider
>the output file. I have following reaction: 9Be (n, 4He) 6He. I do not
>indicated the neutron flux density, and now I have 10 ^ 10-10 ^ 11 helium-6,
>which is impossible if the neutron flux is 10 ^ 8. I think that in Fluka can
>specify the particle flux density, is not it?
>
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dr. Anna Ferrari
Institute of Radiation Physics
Helmholtz-Zentrum Dresden-Rossendorf e.V.
Tel. +49 351 260 2872
a.ferrari_at_hzdr.de
http://www.hzdr.de
Vorstand: Prof. Dr. Dr. h. c. Roland Sauerbrey, Prof. Dr. Dr. h. c. Peter
Joehnk
Vereinsregister: VR 1693 beim Amtsgericht Dresden
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Received on Mon Aug 24 2015 - 01:03:59 CEST