My knowledge on this subject is a bit rusty, so excuse me if I'm asking the wrong question here. I was taking a look at my high school chemistry books from many years ago, and I noticed that reduction and oxidation reactions take part together; meaning that you can't have oxidation without an oxidizing agent.
My question is, that if we have a source of radiation, that emits alpha particles, which attract electrons, or beta particles which repel them, or a source of powerful electromagnetic radiation like gamma radiation, that can knock electrons off of atoms, and we bombard some gas with radiation, ionizing it, then would it count as oxidation without reduction? What exactly is going on redox-wise? We would have positive ions, but no oxidizing agent, or would we?