Dear Hans
There are two problems with your activity usrbin
First of all, "activity" can be scored only if radioactive decays are
activated (otherwise there is no activity) through the RADDECAY card. From
the manual, section on generalized particles:
"(4) "Activity per unit volume" and "Activity per unit mass"
are meaningful only when used within a 2D or 3D USRBIN estimator
associated (by means of the DCYSCORE option) with a decay time defined
with the DCYTIMES option. The resulting output units are Bq/cm**3 and
Bq/g respectively, unless a binning by region or a special binning is
requested, in which case the output is Bq or Bq cm**3/g."
Second, activity binnings cannot be filtered with the AUXSCORE card
(see note to the auxscore command in the manual:)
" 6) A USRBIN/EVENTBIN detector can be associated to AUXSCORE only
if the
binned quantity is scored along a step (10.0 <= WHAT(1) <= 18.0).
In particular, AUXSCORE cannot be used to filter activity
or specific activity."
If you wish to select a specific isotope in the activity binning, you have
to supply a comscw user routine as a filter.
In attach, you find an example of raddecay/scoring cards and a comscw.f
that selects 99Mo for scoring in the second userbin.
Hope this helps
Paola
> Dear Fluka users,
>
> I have a problem with calculating the spatial distribution of Mo-99
> produced via a (gamma,n) reaction in a Mo-100 target. Using the
> RESNUCLEi I obtain a reasonable number, but when calculating the spatial
> distribution in the target with the USRBIN and AUXSCORE cards I get only
> zeros. The input file is attached. Any help is greatly appreciated.
>
> All the best,
> Hans Beijers
>
Paola Sala
INFN Milano
tel. Milano +39-0250317374
tel. CERN +41-227679148
Received on Thu Oct 30 2014 - 16:16:05 CET