Seven Elements Essential to My Atomic Rocket Nozzle

Carbon in the form of Graphene Tape that can be impregnated with 90% pure U-235.
Iron the basic material of steel.
Aluminum to alloy with the Iron and make Strong and Tough Steel.
U-235 to be held on the graphene tape so it can be fissioned and make big heat, one atom at a time.
Polonium and Beryllium to produce neutrons that will fission the U-235 one atom at a time.
Lead on a string or on a tape that can be fed into the nozzle as “reaction mass” which means the mass that the big heat pushes OUT of the nozzle, and since it is cheap, heavy lead, a lot the THRUST is produced when the big heat forces it out of the nozzle at high speed 1/2 mv^2 = Force that drives the rocket. Since the nozzle is ONLY used in OUTER Space, there’s no lead contamination of any atmosphere. Lead is low cost, high mass, and the fission will give it lots of v^2.
My rocket nozzle will allow a rocket to get to the moons of Jupiter, one of which is very attractive (Ganymede).
Also the heavy metal items in the Asteroid belt (Psyche) could be visited and mined for Gold, and Platinum, and Iridium, Osmium, Rhenium, and Rhodium. These materials could be placed in high Earth orbit or at Lagrange points or in Lunar orbit for recovery later by rockets that can connect with and mine the value metals from the asteroid material. Or the surface of the Moon could be used as a holding station, and recovery of value matter could be done from there.

Adventures in space must have some payoff, not just theoretical knowledge of science. Taxpayers want their money invested in something that will show a profit, or at least break even, not be a total loss. Taxpayers do not want to pay for science knowledge. Making them do that is abuse of their trust. Value matter has value. My nozzle can be used to get value matter.