Aluminium under Fe ion

Scoring
1

Dear FLUKA experts,

I am trying to simulate Aluminum under Fe ion to score the Fe ion and neutron fluence attenuations. The fluence of Fe per primary was nearly 99% for 9 cm aluminium, however I was expecting to see a decrease in Fe fluence and increase in neutron fluence while increasing the material thickness, was wondering if anyone knows why I am seeing this kind of result? Below is my Flair and Input file.

Al.flair (2.7 KB)
Al.inp (2.0 KB)

截圖 2025-03-26 上午10.49.00
截圖 2025-03-26 上午10.49.002880×1800 845 KB

Best regards,
Kevin

2

You likely forgot to use the flukapdm executable, which, contrary to the standard fluka executable, embeds the RQMD ion-nucleus event generator performing nuclear reactions at your beam energy.