| 1. | In 1943, Petrzhak studied neutron induced fission of uranium under the supervision of professor Piotr Lukirski.
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| 2. | Let " q " denote the probability that a given neutron induces fission in a nucleus.
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| 3. | Bombarding 238 U with fast neutrons induces fissions, releasing energy as long as the external neutron source is present.
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| 4. | They were then used in the studies of thermal-neutron induced fission of 257 Fm and in discovery of a new fermium isotope 258 Fm.
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| 5. | These were then used in the studies of thermal-neutron induced fission of 257 Fm, and in discovery of a new fermium isotope . 258 Fm.
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