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Two experiments were performed to measure the energy dependence eta of 235U - the relative number of fission neutrons emitted per neutron absorbed, in the thermal and subthermal neutron energy range. Neutrons from the electron linac pulsed neutron source at Geel and from the ILL reactor in Grenoble were used. Experimental techniques and most of the systematic uncertainties differed in the two experiments. Both measurements showed a slight decrease of eta in the subthermal region of about 2%, as compared with thermal energy, thus supporting conclusions from recent integral experiments.

Additional information

Authors: WEIGMANN H, JRC Geel (BE);KECK B, JRC Geel (BE);WARTENA J A, JRC Geel (BE);GELTENBORT P, Institut Laue-Langevin, Grenoble (FR);SCHRECKENBACH K, Institut Laue-Langevin, Grenoble (FR)
Bibliographic Reference: Paper presented: International Conference on the Physics of Reactors: Operation, Design and Computation, Marseille (FR), April 23-27, 1990
Availability: Available from (1) as Paper EN 35240 ORA
Record Number: 199010860 / Last updated on: 1994-12-01
Original language: en
Available languages: en
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