No, potential energy stored within atom bomb never changes, whether it is on Earth or Moon or in space in between. Total output mainly depends on energy density in the space time of the bomb. As the density increases curvature increases, small amount of energy freed, pushes and charges the outside energy, resulting raise of radiation.GG: The atom bomb on the moon is interesting. It seems to me that the lower gravitational field and the lack of an atmosphere will produce less harm locally to the moon. More of the energy will radiate outward into space.
That doesn't mean that the explosion contains less energy (which appears to be what Pasala is arguing).