Dear Sabine
The error code is still there because in the PHYSICS EVAPORAT card you
have what(1)=2,, which means evaporation only of light fragments, not
heavy ones.
If you look in the release notes, you'll see that the mandatory cards are
PHYSICS 3.0 EVAPORAT
PHYSICS 1.0 COALESCE
I see that you are requesting a beam of alpha particles and at the same
time you give the heavy ion definition for americium. The two things do
not match: one should either ask for a simple monochromatic alpha "beam"
or for the decay of Am.
If you wish to have a simple monochromatic alpha, you do not need HI-PROPE
and RADDECAY.
If you wish to have Am decay, first of all please note that you have to
download the latest release, because alpha radiation emission was not
included in fluka2011.2x
With fluka 2020, you'll get the alphas from all the radioactive chain
starting from Am down to stable nuclei.
In this case, you'll have to ask for a beam with SDUM=ISOTOPE, (leave all
WHATS blank) and give, as you already do, the A and Z in the HI-PROPE
card.
The card RADDECAY is needed here, and your card is correct. Conversely the
IRRPROFI card shall not be used: it applies to the production of
radioctive isotopes, while here we already start from a radioactive
isotope.
Please check also the DELTARAY and DCYSCORE cards, maybe I got them
corrupted because there are missing values.
You can also have a look to the activation lecture in the fluka courses
(from the website), and , as always, look in the manual
Hope this helps
Paola
> Dear Experts
>
>
>
> I wanted to model Am-241 Alpha counts into a detector. The input file is
attached.
>
> I always get the same error and I would like to understand what's
happening.
>
> The error message is:
>
>
>
> Predictions for residual nuclei production and ***
>
> *** decays require the activation of heavy fragment ***
>
> *** evaporation by means of the PHYSICS/EVAPORAT card ***
>
> *** look at the manual and release notes for further ***
>
> *** details ***
>
>
>
> *** Execution terminated ***
>
>
>
> I added the PHYSICS/EVAPORAT card but it gives still the same error.
>
> Maybe the experts can look at my file ?
>
> I must admit I have never calculated alpha counts before
>
> Thank you so much !
>
> S. Prys
>
>
>
> filename="PA100b.inp"
>
> TITLE
> MCNP62 Am-241 alpha efficiency to PA-110 PC
> DEFAULTS
> PRECISIO
> BEAM -0.006 10000.
> 4-HELIUM
> BEAMPOS 0.0 0.0 -0.1
> HI-PROPE 95. 241.
> GEOBEGIN
> COMBNAME
> 0 0 MCNP62 Am-241 alpha efficiency to PA-110 PC
> RPP blkbody -25. 25. -15. 15. -15. 15.
> RPP void -20. 20. -10. 10. -10. 10.
> RPP housing -12. 12. -3.75 3.75 0.0 5.5
> RPP al1 -8.75 8.75 -2.85 2.85 0.0 2E-05
> RPP pet -8.75 8.75 -2.85 2.85 2E-05 0.000592
> RPP al2 -8.75 8.75 -2.85 2.85 0.000592 0.000612
> RPP airin -38.75 -17.25 -21.85 -16.15 0.000612 0.5
> RPP airout -14. 14. -7. 7. -2. 8.
> END
> BLKBODY 5 blkbody -void
> VOID 5 void -airout
> OUTSIDE 5 airout -housing -al1
> HOUSING 5 housing -airin -al2 -pet -al1
> FILLING 5 airin
> AL1 5 al1
> PET 5 pet
> AL2 5 al2
> END
> GEOEND
> ASSIGNMA BLCKHOLE BLKBODY
> ASSIGNMA VACUUM VOID
> ASSIGNMA AIR OUTSIDE
> ASSIGNMA AIR FILLING
> ASSIGNMA ALUMINUM HOUSING
> ASSIGNMA ALUMINUM AL1
> ASSIGNMA POLYETHY PET
> ASSIGNMA ALUMINUM AL2
> PHYSICS 2. 4-HELIUM
> EM-DISSO
> PHYSICS 2. 4-HELIUM
> EVAPORAT
> IONTRANS 4-HELIUM
> DELTARAY AIR
> RADDECAY 2. 1.
> IRRPROFI 1.
> DCYSCORE -1.
> AUXSCORE USRBIN
> USRBIN 10. 4-HELIUM -21. 8.75 2.85
> 0.5usrbin
> USRBIN -8.75 -2.85 6.12E-4 100. 50. 10. &
USRTRACK 1. 4-HELIUM -22. FILLING 100.
> 256.ustrack
> USRTRACK 7E-3 1E-6 &
RANDOMIZ 1.
> START 5000.
> STOP
>
>
>
> __________________________________________________________________________
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>
Paola Sala
INFN Milano
tel. Milano +39-0250317374
tel. CERN +41-227679148
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Received on Sun Jan 19 2020 - 12:55:12 CET