Dear @amario,
Yes, after your help, I was able to get a 14 MeV peak of D-T neutrons. This is half the success! D-D neutrons remained unconquered at this stage. Maybe there is some other great idea? Could you count this file on your FLUKA? Suddenly, you will generate DD neutrons, and the problem is in some of my settings?
dd_dt_v1.flair (3.9 KB)