Hello FLUKA community,
I am working on a simulation involving a neutron-sensitive solid-state detector (SSNTD) which detects charged particles from 10B(n,α)7Li reactions. I would like to score the track-length fluence of lithium-7 (Li-7) ions in the detector volume using USRBIN .
However, I could not find Li-7 in the particle drop down menu in FLAIR, and there is no clear documentation.
Dear @akshad997,
Thank you for your question.
This is possible by scoring the generalized particle HEAVYION with USRBIN, and then filtering by the desired ion species with the AUXSCORE card (7.22.3. AUXSCORE — FLUKA Manual)
If, for example, the name of your USRBIN detector is Li7Flu, the AUXSCORE card should look like:
Best,
Davide
I am currently modeling a system where an isotropic Am-Be neutron source is placed. The emitted neutrons pass through a water column for moderation and then interact with a boron layer coated on a plastic substrate, where I expect (n,α) reactions to occur, producing alpha particles and Li-7 nuclei.
The scoring setup includes:
USRBIN detectors to record particle track-length fluence.USRBIN.AUXSCORE to filter HEAVYION by Li7 (atomic number Z=3, mass number A=7, isomeric state M=0), but surprisingly, no lithium appeared in the boron or plastic regions — not even when scoring the entire geometry volume.Could anyone please help me understand:
Why Li-7 is not appearing even though He-4 is observed?
Any guidance or suggestions would be greatly appreciated!
Best regards,
Dear @akshad997,
I think the IONTRANS card is missing in your input file. You need it to activate the transport and interaction of ions heavier than 4He. Note that you have to run with the flukadpm executable or link DPMJET and RQMD if you need a custom executable.
Best,
Davide
