Abstract
ON bombarding uranium with neutrons, Fermi and collaborators1 found that at least four radioactive substances were produced, to two of which atomic numbers larger than 92 were ascribed. Further investigations2 demonstrated the existence of at least nine radioactive periods, six of which were assigned to elements beyond uranium, and nuclear isomerism had to be assumed in order to account for their chemical behaviour together with their genetic relations.
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References
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Fermi, E., Amaldi, F., d'Agostino, O., Rasetti, F., and Segrè, E. Proc. Roy. Soc., A, 146, 483 (1934).
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See Meitner, L., Hahn, O., and Strassmann, F., Z. Phys., 106, 249 (1937).
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Curie, I., and Savitch, P., C.R., 208, 906, 1643 (1938).
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Hahn, O., and Strassmann, F., Naturwiss., 26, 756 (1938).
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Hahn, O., and Strassmann, F., Naturwiss., 27, 11 (1939).
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See Meitner, L., Strassmann, F., and Hahn, O., Z. Phys., 109, 538 (1938).
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Bethe, A. H., and Placzek, G., Phys. Rev., 51, 450 (1937).
Author information
Affiliations
Physical Institute, Academy of Sciences, Stockholm.
- LISE MEITNER
Institute of Theoretical Physics, University, Copenhagen. Jan. 16.
- O. R. FRISCH
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Further reading
-
1.
Another four bricks in the wall
Nature Chemistry (2016)
-
2.
Low Density Phases in a Uniformly Charged Liquid
Communications in Mathematical Physics (2016)
-
3.
Resonance (2016)
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