Neutron-induced fission cross section of U-234 measured at the CERN n_TOF facility

Abstract : The neutron-induced fission cross section of 234 U has been measured at the CERN n_TOF facility relative to the standard fission cross section of 235 U from 20 keV to 1.4 MeV and of 238 U from 1.4 to 200 MeV. A fast ionization chamber (FIC) was used as a fission fragment detector with a detection efficiency of no less than 97%. The high instantaneous flux and the low background characterizing the n_TOF facility resulted in wide-energy-range data (0.02 to 200 MeV), with high energy resolution, high statistics, and systematic uncertainties bellow 3%. Previous investigations around the energy of the fission threshold revealed structures attributed to β -vibrational levels, which have been confirmed by the present measurements. Theoretical calculations have been performed, employing the TA LY S code with model parameters tuned to fairly reproduce the experimental data.
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Physical Review C, American Physical Society, 2014, 89, pp.044606. 〈10.1103/PhysRevC.89.044606〉
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http://hal.in2p3.fr/in2p3-01073786
Contributeur : Sophie Heurteau <>
Soumis le : vendredi 10 octobre 2014 - 14:09:08
Dernière modification le : mercredi 31 janvier 2018 - 12:12:48

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D. Karadimos, L. Audouin, S. David, S. Isaev, C. Stephan, et al.. Neutron-induced fission cross section of U-234 measured at the CERN n_TOF facility. Physical Review C, American Physical Society, 2014, 89, pp.044606. 〈10.1103/PhysRevC.89.044606〉. 〈in2p3-01073786〉

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