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|Title:||Measurement of the 236U(n,f) Cross Section as a Function of the Neutron Energy|
|Authors:||WAGEMANS Cyriel; DE SMET Liesbeth; VERMOTE S.; HEYSE Jan; SEROT O.; VAN GILS Jaak|
|Citation:||Proceedings of the ND 2007 International Conference on Nuclear Data for Science and Technology vol. 1 p. 487-490|
|Type:||Contributions to Conferences|
|Abstract:||The 236U(n,f) cross section has been measured in the neutron energy region from 0.5 eV to 25 keV at the GELINA neutron facility of the IRMM in Geel, Belgium. A highly enriched 236U sample was mounted back-to-back with a 10B sample in the centre of a Frisch-gridded ionisation chamber; a control measurement was performed with a 235U sample in the same configuration. Besides a dominant resonance at 5.45 eV, for which a resonance analysis was performed, the next resonance (cluster) only occurs at about 1.3 keV. It is demonstrated that the fission resonance integral and the thermal fission cross section adopted in all commonly used evaluated data libraries are too large by two orders of magnitude.|
|JRC Institute:||Institute for Reference Materials and Measurements|
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