FLUKA: Re: Residual nuclei

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

Hi Dominik,

after consulting with Alfredo Ferrari, here are some answers:

> 1. What extreme (Z,A) values of the residual isotopes are possible for
>    a region filled by the compound medium (consisted of many different
>    (Z,A) isotopes) ? Does exist any general rule ?

You can get what you can get in nature: all the nuclei with A and Z smaller or
equal to those of the components with the highest A and Z (actually, to be
picky, A+1 and Z+1: in case of capture reactions)

> 2. Can light nuclei (like for instance He3) migrate from region to region
>    and be stored (by RESNUCLEi card) not in the region where they
>    were born ?

Yes. In general, however, they don't travel very far.

> 3. Are all printed residual isotopes always (from definition) in the
>    ground state ?

No. The scoring does not distinguish between states: they are all scored
as the same isotope.

> 4. What about the very-short-live nuclei, are their daughters included in
>    the printed output or one has to examine a proper decay scheme ?

No, if you want them to decay, you must do it yourself (but I know that there
are around user-written programs which do it: if you are interested, you may 
ask 
the list)

> 5. Same as above but for meta-states (if there is co-existency of a long
>    live and the very-short-live states for the same isotope) ?

As I said under point 3, there is no distinction between states, excited 
states 
and metastates.

> 6. What should I read to know more ? (not too much, please).

I don't think there is much else. But I will include some of the above
information in the manual.

  Alberto

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