Note on the Prompt-Fission-Neutron Spectra of Uranium-233 and -235 and Plutonium-239 and -240 Relative to That of Californium-252

A. Smith; P. Guenther; G. Winkler; R. McKnight

doi:dx.doi.org/10.13182/NSE80-A21327

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Home / Publications / Journals / Nuclear Science and Engineering / Volume 76 / Number 3

Note on the Prompt-Fission-Neutron Spectra of Uranium-233 and -235 and Plutonium-239 and -240 Relative to That of Californium-252

A. Smith, P. Guenther, G. Winkler, R. McKnight

Nuclear Science and Engineering / Volume 76 / Number 3 / December 1980 / Pages 357-361

Technical Note / dx.doi.org/10.13182/NSE80-A21327

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The prompt-neutron-induced fission spectra of ²³³U, ²³⁵U, ²³⁹Pu, and ²⁴⁰Pu were measured relative to the prompt-spontaneous-fission-neutron spectrum of ²⁵²Cf. Analysis of the measured values indicates that the incremental average-fission-neutron energies relative to a ²⁵²Cf fission-neutron spectrum of Maxwellian form with an average energy of 2.13 MeV are −123 ± 30 (²³³U), −157 ± 24 (²³⁵U), −76 ± 29 (²³⁹Pu), and −46 ± 29(²⁴⁰Pu) keV.