1. Some induced radioactivity is produced by background radiation, which is mostly natural. 2. Nagchaudhuri's research focused on nuclear isomers, induced radioactivity , Cherenkov radiation and nonthermal plasma. 3. Detractors of food irradiation have concerns about the health hazards of induced radioactivity . 4. For example, neutron capture often results in neutron activation, inducing radioactivity . 5. Fermi won the 1938 Nobel Prize in Physics for his work on induced radioactivity . 6. Rasetti was one of Fermi's main colloaborators in the study of neutrons and neutron-induced radioactivity . 7. The conditions inside certain types of nuclear reactors with high neutron flux can cause induced radioactivity . 8. The elements most important for induced radioactivity for sea water are sodium-24, chlorine, magnesium, and bromine. 9. In March 1934, Fermi wanted to see if he could induce radioactivity with Rasetti's polonium-beryllium neutron source. 10. Then there was what's called neutron-induced radioactivity .