You are looking for aneutronic fusion: https://en.wikipedia.org/wiki/Aneutronic_fusion

He3 is required but rare, or Boron fusion but needs a ton more input energy than D-T fusion. The sibling comments regarding Helion Energy is an attempt to do this using He3 and a way to synthesize it since it is very rare. The way they synthesize it is D-D fusion which does produce neutrons.

Regarding He3, people talk about mining this on the moon since it is less rare there, but IMO, its a stupid idea since it isn't like mining an ore where there is concentrations of it, it's weakly spread out all over the surface.