Abstract
AFTER our experimental proof of the existence of tripartition and quadripartition (ternary and quaternary fission) of U235 by means of photographic emulsion1,2, a systematic study of the mass and kinetic energy of fission fragments has been made with the Ilford Nuclear Research C2 plate. The experimental conditions were similar to those of previous work. C2 plates soaked with 10 percent solution of uranyl nitrate were bombarded with slow neutrons produced near the beryllium target of the cyclotron of the Collège de France.
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References
Tsien San-Tsiang, Chastel, R., Ho Zah-Wei and Vigneron, L., C.R. Acad. Sci., Paris, 223, 986 (1946).
Ho Zah-Wei, Tsien San-Tsiang, Vigneron, L., and Chastel, R., C.R. Acad. Sci., Paris, 223, 1119 (1946).
Tsien San-Tsiang, Ho Zah-Wei, Chastel R., and Vigneron, L., C.R. Acad. Sci., Paris, 224, 272 (1947).
Tsien San-Tsiang, Ho Zah-Wei, Chastel, R., and Vigneron, L., Phys. Rev., 71, 382 (1947).
In the previous publications, the calculation of energy was based upon the V—R relation given by Bøggild, Bostrøm and Lauritsen (Kgl. Danske Videnskab. Selskab. Math.-Fys. Medd., 28; 1940), assuming the total kinetic energy of binary fission fragments to be 162 MeV., instead of the more recent value, 151 MeV., from Flammersfeld, Jensen and Gentner (Z. Phys., 120, 450; 1943). Therefore, our formerly published total kinetic energy should be diminished by about 10 MeV.
Bohr, N., and Wheeler, J. A., Phys. Rev., 56, 426 (1939).
Demers, P., Phys. Rev., 70, 974 (1946).
Present, R. D., Phys. Rev., 59, 466 (1941).
Tsien San-Tsiang, C.R. Acad. Sci., Paris, 224, 1056 (1947).
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SAN-TSIANG, T., ZAH-WEI, H., VIGNERON, L. et al. Ternary and Quaternary Fission of Uranium Nuclei. Nature 159, 773–774 (1947). https://doi.org/10.1038/159773a0
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DOI: https://doi.org/10.1038/159773a0
