>>14322649Gamma radiation doesn't induce radioactivity in things it hits. It's neutron radiation that does that. That's why they use gamma emitters like Cs-137 and Co-60, which don't emit neutron radiation.
Gamma radiation can kill you dead, but only if you're exposed to it. Being exposed to something that was itself exposed to gamma radiation is harmless, because gamma radiation does not make other things radioactive.
