Alright, I have a basic understanding about anti hydrogen - hydrogen annihilation reaction. But what exactly happens if an anti hydrogen atom stumbles into anything else like a deuterium, tritium of helium atom? From my limited understanding, antimatter can only react with its anti-particle. So if a single anti hydrogen strikes a helium 4 atom, the anti proton reacts with a proton in the helium core and it positron reacts with an electron in the helium. The remainder, a proton with 2 neutron and 1 electron (=Tritium atom) should fly away the opposite direction. Correct? If so, would this be a usefull property which we can use for propulsion/energy production. Instead of a neutral Helium, we could strip the outer electron, and the antimatter reaction would be (besides the standard propton antimatter product) be a highly directed tritium ion, which we could directly use for propulsion using a magnetic nozzle, correct?