It takes heavy shielding of lead or steel to stop gamma rays. Emission of photons from a nucleus does not result in a transmutation. These electrons, the electrons generated by further collisions, as well as electrons produced by the new photons, are responsible for the damage caused by gamma radiation. Visible light, like gamma rays, is also electromagnetic energy, but of lower frequency. Visible light photons are not energetic enough to cause ionization.
Radio waves are of even lower frequency than visible light.