FURMAN, W.; CENNINI, P.; KETLEROV, V.; GOVERDOVSKI, A.; KONOVALOV, V.; ABBONDANNO, U.; AERTS, G.; ÁLVAREZ, H.; ALVAREZ-VELARDE, F.; ANDRIAMONJE, S.; ANDRZEJEWSKI, J.; ASSIMAKOPOULOS, P.; AUDOUIN, L.; BADUREK, G.; BAUMANN, P.; BECVÁR, F.; BENLLIURE, J.; BERTHOUMIEUX, E.; CALVIÑO, F.; CANO-OTT, D.; CAPOTE, R.; CARRILLO DE ALBORNOZ, A.; CHEPEL, V.; CHIAVERI, E.; COLONNA, N.; CORTES, G.; CORTINA, D.; COUTURE, A.; COX, J.; DAVID, S.; DOLFINI, R.; DOMINGO-PARDO, C.; DOROCHENKO, A.; DRIDI, W.; DURAN, I.; EMBID-SEGURA, M.; FERRANT, L.; FERRARI, Anthony; FERREIRA-MARQUES, R.; FITZPATRICK, L.; FRAIS-KOELBL, H.; FUJII, K.; GUERRERO, C.; GONCALVES, I.; GALLINO, R.; GONZALEZ-ROMERO, E.; GRAMEGNA, F.; GRIESMAYER, E.; GUNSING, F.; HAAS, B.; HAIGHT, R.; HEIL, M.; HERRERA-MARTINEZ, A.; IGASHIRA, M.; ISAEV, S.; JERICHA, E.; KADI, Y.; KÄPPELER, F.; KARAMANIS, D.; KARADIMOS, D.; KERVENO, M.; KOEHLER, P.; KOLOKOLOV, D.; KOSSIONIDES, E.; KRTICKA, M.; LAMBOUDIS, C.; LEEB, H.; LINDOTE, A.; LOPES, I.; LOZANO, M.; LUKIC, S.; MARGANIEC, J.; MARQUES, L.; MARRONE, S.; MASTINU, P.; MENGONI, A.; M. MILAZZO, P.; MOREAU, C.; MOSCONI, M.; NEVES, F.; OBERHUMMER, H.; O'BRIEN, S.; OSHIMA, M.; PANCIN, J.; PAPACHRISTODOULOU, C.; PAPADOPOULOS, C.; PARADELA, C.; PATRONIS, N.; PAVLIK, A.; PAVLOPOULOS, P.; PERROT, L.; PLAG, R.; PLOMPEN, A.; PLUKIS, A.; POCH, A.; PRETEL, C.; QUESADA, J.; RAUSCHER, T.; REIFARTH, R.; ROSETTI, M.; RUBBIA, C.; RUDOLF, G.; RULLHUSEN, P.; SALGADO, J.; SARCHIAPONE, L.; SEDYSHEVA, M.; STEPHAN, C.; TAGLIENTE, G.; L. TAIN, J.; TASSAN-GOT, L.; TAVORA, L.; TERLIZZI, R.; VANNINI, G.; VAZ, P.; VENTURA, A.; VILLAMARIN, D.; C. VINCENTE, M.; VLACHOUDIS, V.; VLASTOU, R.; VOSS, F.; WENDLER, H.; WIESCHER, M.; WISSHAK, K.

doi:10.1063/1.1945184

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Proceedings of the International Conference on Nuclear Data for Science and Technology, Proceedings of the International Conference on Nuclear Data for Science and Technology, 2004-09-26, Santa Fe. 2005, vol. 769, n° 769, p. 1039-1042

American Institute of Physics

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A series of measurements of 237Np fission cross section have been performed at the CERN spallation neutron facility n_TOF which covers a wide energy range from 1 eV up to 250 MeV. A fast ionization chamber (FIC) was used as a fission fragment detector with registration efficiency of not less than 97 %. Particular attention was paid to correct the fission cross section with use of 235U standard. Total experimental uncertainties are determined to be at the level of 3%. Analysis of the experimental data in the restricted neutron energy from 5 eV up to 1 MeV showed a systematic deviation from evaluated data (ENDF/B-VI). This discrepancy amounts to up to a factor 3 for resolved resonances in the neutron energy range of 5 eV - 2 KeV, and is in good agreement with some previous experiments. A similar disagreement at the level of 6-7% was found for higher energies around the threshold (En = 300 keV-1 MeV). This energy range is essential for the transmutation of neptunium in ADS or fast reactors. It is concluded that an updated evaluation of nuclear data for 237Np is required< Réduire

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High-Resolution Study of $^{237}$Np Fission Cross Section from 5 eV to 1 MeV

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