I was talking to a person that studies photo fission and i asked if I could shoot a couple of lower energy photons to cause fission. But he said it wouldn't work I would need 1 high energy one. Im not completely sure why this wouldn't work. Does the photon have to get absorbed at one point. Not sure how that works. What if I shot a neutron and a photon at the same place, and both together had enough energy to induce fission. I dont know that much about photo fission.