## Abstract

Measurements of the ^{239}Pu fission cross-section were performed at a well-collimated short flight-path of the C.B.N.M. Linac from 30 eV to below thermal energy for a direct normalization to the 2200 m/s reference cross-section. The fission reaction rate and the neutron spectrum were determined simultaneously with solid state detectors placed on each side of a back-to-back ^{239}Pu-^{10}B-layer. From the counting-rate ratios σ_{f}-curves were calculated assuming a 1/v behaviour of the ^{10}B(n, α)^{7}Li cross-section. Several fission and resonance integrals are calculated from the normalized σ_{f}-curve and compared with other published results. It is shown that the large discrepancies between the reported results (up to more than a factor of 2) can be considerably reduced by applying a common normalization procedure, e.g. to the fission integral ∫ 9ev 20evσ_{f}(E)dE=1046·6±10·4 barn ev obtained from these measurements.

Original language | English |
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Pages (from-to) | 293-301 |

Number of pages | 9 |

Journal | Journal of Nuclear Energy |

Volume | 26 |

Issue number | 6 |

DOIs | |

State | Published - Jun 1972 |

## ASJC Scopus subject areas

- General Engineering