At high enough photon energy, electromagnetic radiation actually can make things radioactive. The general term is "photonuclear reactions." Here's an example:

At high enough photon energy, electromagnetic radiation actually can make things radioactive. The general term is "photonuclear reactions." Here's an example: "Photonuclear production of medical isotopes 62,64Cu using intense laser-plasma electron source" https://aip.scitation.org/doi/10.1063/1.5100925 https://aip.scitation.org/doi/10.1063/1.5100925