Thank you sensei, I was unaware of the photodisintegration via high energy gamma rays... exactly where in the natural environment would you expect to see such high energy gamma rays? While I acknowledge that you are correct I was going by what the atomic energy commision says about nuclear fallout, em radiation doesn't cause radioactivity in stable atoms. BTW do protons disintegrate into neutrons under this extreme gamma ray flux?
Again, this is not true, only very high energy gamma rays can photo disintegrate a nucleus... Not "any of radiation", no matter how long exposed. Under normal Earth conditions only particle radiation can cause a nucleus to become radioactive.