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F. Belloni, G. Badurek, E. Jericha, H. Leeb, H. Oberhummer, M. Pigni, -. nTOF Collaboration:
"Neutron-induced fission cross-section of ²³³U, ²⁴¹Am and ²⁴³Am in the energy range 0.5 MeV ≤ En ≤ 20 MeV";
in: "Proceedings of the Scientific Workshop on Nuclear Measurements, Evaluations and Applications - NEMEA-6; NEA/NSC/DOC(2011)4", issued by: OECD/NEA; OECD/NEA, Paris, 2011, 113 - 117.

Neutron-induced fission cross-sections of ²³³U, ²⁴¹Am and ²⁴³Am relative to ²³⁵U have been measured in a wide energy range at the neutron time of flight facility n_TOF in Geneva to address the present discrepancies in evaluated and experimental databases for reactions and isotopes relevant for transmutation and new generation fast reactors.

A dedicated fast ionization chamber was used. Each isotope was mounted in a different cell of the modular detector.

The measurements took advantage of the characteristics of the n_TOF installation. Its intrinsically low background, coupled to its high instantaneous neutron flux, results in high accuracy data. Its wide energy neutron spectrum helps to reduce systematic uncertainties due to energy-domain matching problems while the 185 m flight path and a 6 ns pulse width assure an excellent energy resolution.

This paper presents results obtained between 500 keV and 20 MeV neutron energy.

http://publik.tuwien.ac.at/files/PubDat_199632.pdf