Dear Qi
in your input, photonuclear reactions are activated in material 17 and 26
(Iodine). However, if I understand correctly, the material of the target
is not Iodine, it is LLFP, material 27.
The same for the LAM-BIAS card.
For yor convenience, you can use directly material names in all card, and
avoid assigning numbers. Numbers will be assigned automatically and
printed out in the manual.
Following your mail, we will improve the output file by adding the
information about activation of photonuclear reactions, which is presently
missing
Regards
Paola
> Dear Fluka experts,
>
>
> I want to get the photo-neutron yield in PbI2, induced by 5~15MeV gamma.
> As Iodine
> is not the pre-defined material, it was included in the low-energy
> neutron cross section liberary. Whether or not I just need to define
> Iodine in cards MATERIAL, COMPOUND and LOW-MAT so that I can simulate the
> photonuclear process of Iodine?
>
>
> I write a .inp file(as follow and the attached file), and it can run
> without warning. But if I assign PbI2 (defined as material number 27) to
> the target material, no neutron data was contained in the output USRBDX
> file (all is zero). If the ASSIGNMA card just contains Pb(material number
> 17), neutron data can be put out correctly. What is the problem?
> *
> --+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
>
> BEAM -1.0E-02 5.0E-03
> PHOTON
> BEAMPOS 0.0 0.0 0.0 1.0 0.0 0.0
> PHOTONUC 1.0 0.0 0.0 17.0 26.0 9.0
> LAM-BIAS 0.0 0.01 17.0 7.0 0.0 0.0
> LAM-BIAS 0.0 0.01 26.0 7.0 0.0 0.0
>
> *
> --+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
> MATERIAL 53.0 0.0 1.32 26.0 0.0
> 0.0IODINE
> MATERIAL 0.0 0.0 3.24 27.0 0.0 0.0LLFP
> COMPOUND 2.0 17.0 1.0 26.0 0.0 0.0LLFP
> LOW-MAT 26.0 53.0 127.0 296.0 0.0
> 0.0IODINE
>
> *
> --+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
> ASSIGNMA 17.0 TA1
> *...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
> EMFCUT -6.0E-3 6.0E-3 0.0 17.0 26.0
> 9.0PROD-CUT
> *
> --+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
> USRBDX 1. NEUTRON 59. TA1 VAC 1.0neu
> USRBDX 1.00 0.0 100.0 6.2831 0.0 1.0&
>
>
> PS:
> Best Regards
>
>
> Qi
>
Paola Sala
INFN Milano
tel. Milano +39-0250317374
tel. CERN +41-227679148
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Received on Fri May 22 2020 - 14:01:06 CEST