Mass Yields in the Fission of Uranium-235 and Plutonium-239 in the Neutron Spectrum of a Gas-Cooled Fast Reactor

M. Rajagopalan; H. S. Pruys; A. Gr&uuml;tter; H. R. von Gunten; E. A. Hermes; R. Richmond; E. R&ouml;ssler; A. Schmid; P. Wydler

doi:dx.doi.org/10.13182/NSE75-A26796

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Mass Yields in the Fission of Uranium-235 and Plutonium-239 in the Neutron Spectrum of a Gas-Cooled Fast Reactor

M. Rajagopalan, H. S. Pruys, A. Grütter, H. R. von Gunten, E. A. Hermes, R. Richmond, E. Rössler, A. Schmid, P. Wydler

Nuclear Science and Engineering / Volume 58 / Number 4 / December 1975 / Pages 414-419

Technical Paper / dx.doi.org/10.13182/NSE75-A26796

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The yields of 27 mass chains in the fission of ²³⁵U and the ratio of fast-neutron to thermal-neutron fission yields (the “R” value) of 21 mass chains in the fission of ²³⁹Pu induced by fast neutrons (median energy ∼180 keV) have been measured in the reactor PROTEUS. The yields were obtained by a comparison method using gamma-ray spectroscopy. The data show that, in agreement with other authors, yields in the peaks of the mass distribution do not change compared to thermal-neutron-induced fission.