Re: FLUKA: Production of Hydrogen

[Alberto Fasso' <Alberto.Fasso@cern.ch>]

Dear Yann,

H-1 is a "nucleus" but is also a proton, i.e. "a particle".
Therefore, it is difficult to score as a residual nucleus.
For instance:
- a 10 GeV proton produced in a spallation reaction, shall it be scored
  as a residual nucleus?
- a neutron scatters with a hydrogen nucleus and produces a recoil.
  Is the recoil a residual nucleus?
- a proton interacts with a nucleus and makes a (p,n) reaction. The
  proton has disappeared: should it still be scored as a residual
  nucleus?
  (To be honest, it will soon be possible to say the same about 
  deuterons, tritons and alphas, as soon as their nuclear interactions
  will be implemented, as planned. We will have to find a solution
  to this).

Anyway, one way to attack your problem could be to score
separately "stopping protons" (protons reaching energy cutoff). This is
possible using the MGDRAW user routine. Unfortunately it will not be a
complete solution, because you will still be missing protons produced
in low energy neutron reactions, which FLUKA does not generate
explicitely. (But it will catch the hyrogen recoils, although I am not
sure that it is a desirable feature for you)

Alberto

On Wed, 29 Aug 2001, foucher wrote:

> Dear FLUKA users,
> 
> I'm interested in calculating the production of hydrogen in strucural
> materials.
> I've used the RESNUCLE card to get this information. The problem is that
> I only get
> the production for H-2 and H-3.
> In order to get the total production of hydrogen (H-1 + H-2 + H-3), how
> can get the production of
> H-1 ?
> Thanks for answering my question.
> 
> Yann FOUCHER
> Spallation Neutron Source
> Paul Scherrer Institut
> 
> 

-- 
Alberto Fassò
CERN-EP/AIP, CH-1211 Geneve 23 (Switzerland)
Phone: (41 22) 767 2398    Fax: (41 22) 767 9480   Alberto.Fasso@cern.ch