RE: How can I score neutron fluence?

From: Görkem Türemen <gorkem_turemen_at_hotmail.com>
Date: Thu, 31 Mar 2011 12:49:52 +0000

Dear Mattias and Anna,

Thanks for clarification. I'm sorry about my fundamental questions. I'm
exactly understand the problem now.

I appriciate for your suggestions.

Best regards

Gorkem

----------------------------------------
> Date: Thu, 31 Mar 2011 11:02:55 +0200
> Subject: Re: How can I score neutron fluence?
> From: anna.ferrari_at_lnf.infn.it
> To: gorkem_turemen_at_hotmail.com
> CC: mattias.lantz_at_physics.uu.se; fluka-discuss_at_fluka.org
>
>
> Dear Gorkem,
>
> the choice of the DEFAULTS card does not affect at all your results: by
> chosing NEW-DEFA you set the particle transport threshold at 10 MeV,
> EXCEPT for neutrons where the threshold is at 1E-5 eV. If low-energy
> neutrons are produced you must see them.
> As Mattias said you have a threshold problem for the (p,n) reactions in
> air...
>
> cheers,
>
> Anna
>
>
>
> > Dear Lantzelot and all,
> >
> > Thanks for prompt reply. I'm not really sure about 3 MeV proton beam
> > give any (p,n) reaction in air. But DEFAULTS card description in Fluka
> > manual says, particle transport threshold set at 10 MeV.(NEW-DEFAults)
> >
> > Can't I change the threshold to 3 MeV with PART-THRes card? ( I tried
> > but it doesn't make any difference)
> >
> > Best regards
> >
> > Gorkem Turemen
> >
> >
> > On 03/29/2011 01:18 AM, Lantzelot wrote:
> >> Dear Gorkem,
> >>
> >> Are you sure that the proton energy 3 MeV is enough to give any (p,n)
> >> reaction in any of the materials? Please double check the threshold
> >> for any neutron producing reaction. If you are not sure, try with
> >> 10-15 MeV beam energy and then decrease it until you reach threshold.
> >>
> >> Best wishes,
> >> Mattias Lantz
> >>
> >>
> >> On 28/03/11 14:33, Gorkem Turemen wrote:
> >>> Dear all,
> >>>
> >>> Why I can't score neutrons ? (generated from 3 MeV proton beam)
> >>> However
> >>> I can score neutrons when I increase the energy to GeV degree.
> >>>
> >>> I'm already waiting for suggestions. I attached my input file.
> >>>
> >>> Thanks a lot.
> >>>
> >>> Best regards..
> >>>
> >>> Gorkem Turemen
> >>>
> >>
> >>
> >
> >
>
>
Received on Thu Mar 31 2011 - 19:00:46 CEST

This archive was generated by hypermail 2.2.0 : Thu Mar 31 2011 - 19:00:47 CEST