Dear FLUKA experts，I want to observe what secondary particles will produced by U238 targeting .I set the beam and the HI-PROPE correctly and use usebin to find if there is any electron,proton or some other particles.But I got every particles 0 but the HVY-IONS. Can you help me with this problem?
and your beam is injected at the origin (x=y=z=0), with a range in air of the order of 1 mm.
As a side note, note that the PRECISIOn transport threshold for ions is 25 keV/n (as the one of alpha particles, i.e. 4-HELIUM) and your beam of 15 keV/n requires to lower it down to its minimum, by means of a PART-THR card asking to apply 1 keV to 4-HELIUM.
I said 1 keV, while you asked for 1 eV, which is ignored being below the acceptable limit.
Anyway, no electron above 1 keV - which is the minimal energy attainable by FLUKA - can indeed be produced by such a low energy ion beam.
In short, the simulation of the latter is not particularly informative, in view of its tiny range.