High-Accuracy 233U(n, f ) Cross-Section Measurement at the White-Neutron Source n_TOF from Near-Thermal to 1 MeV Neutron Energy

The 233U(n,f) cross-section has been measured at n TOF in a wide energy range with a dedicated fission ionization chamber. We report here the results from ~30 meV to 1 MeV neutron energy. The 233U(n,f) cross-section has been determined relative to a reference sample of 235U(n, f) measured simultaneously with the same detector. The very high instantaneous neutron ux and the intrin-sically low background of the n_TOF installation result in an accuracy around 3% in the whole energy range, while the energy resolution of the neutron beam allowed us to extend the resolved resonance region above the limit of previous measurements. Resonance analysis was carried out with an R-matrix code. The present high quality data provide the basis for a more precise evaluation of the 233U ssion cross-section, and to improve the reliability of databases needed for the design of new energy systems based on the Th/U cycle.

CALVIANI M.;  PRAENA J.;  ABBONDANNO U.;  AERTS G.;  ALVAREZ H.;  ÁLVAREZ-VELARDE F;  ANDRIAMONJE S.;  ANDRZEJEWSKI J.;  ASSIMAKOPOULOS P.;  AUDOUIN L.;  BADUREK G.;  BAUMANN P.;  BECVAR F.;  BELLONI F.;  BERTHIER B.;  BERTHOUMIEUX E.;  CALVIÑO F.;  CANO-OTT D.;  CAPOTE R.;  CARRAPIÇO C.;  CENNINI P.;  CHEPEL V.;  CHIAVERI E.;  COLONNA N.;  CORTES G.;  COUTURE A.;  COX J.;  DAHLFORS M.;  DAVID S.;  DILLMANN I.;  DOMINGO-PARDO C.;  DRIDI W.;  DURAN I.;  ELEFTHERIADIS C.;  EMBID-SEGURA M.;  FERRANT L.;  FERRARI A.;  FERREIRA-MARQUES R.;  FUJII K.;  FURMAN W.;  GONCALVES I.;  GONZÁLEZ-ROMERO E.;  GOVERDOVSKI A.;  GRAMEGNA F.;  GUERRERO C.;  GUNSING F.;  HAAS B.;  HAIGHT R.;  HEIL M.;  HERRERA-MARTINEZ A.;  IGASHIRA M.;  JERICHA E.;  KAPPELER F.;  KADI Y.;  KARADIMOS D.;  KARAMANIS D.;  KETLEROV V.;  KERVENO M.;  KOEHLER P.;  KONOVALOV V.;  KOSSIONIDES E.;  KRTICKA M.;  LAMPOUDIS C.;  LEEB H.;  LINDOTE A.;  LOPES I.;  LOZANO M.;  LUKIC S.;  MARGANIEC J.;  MARRONE S.;  MARTÍNEZ T.;  MASSIMI C.;  MASTINU P.;  MENGONI A.;  MILAZZO P. M.;  MOREAU C.;  MOSCONI M.;  NEVES F.;  OBERHUMMER H.;  O'BRIEN S.;  PANCIN J.;  PAPACHRISTODOULOU C.;  PAPADOPOULOS C.;  PARADELA C.;  PATRONIS N.;  PAVLIK A.;  PAVLOPOULOS P.;  PERROT L.;  PIGNI M. T.;  PLAG R.;  PLOMPEN Arjan;  PLUKIS A.;  POCH A.;  PRETEL C.;  QUESADA J.;  RAUSCHER T.;  REIFARTH R.;  ROSETTI M.;  RUBBIA C.;  RUDOLF G.;  RULLHUSEN Peter;  SALGADO J.;  SANTOS C.;  SARCHIAPONE L.;  SAVVIDIS I.;  STEPHAN C.;  TAGLIENTE G.;  TAIN J. L.;  TASSAN-GOT L.;  TAVORA L.;  TERLIZZI R.;  VANNINI G.;  VAZ P.;  VENTURA A.;  VILLAMARIN D.;  VINCENTE M. C.;  VLACHOUDIS V.;  VLASTOU R.;  VOSS F.;  WALTER S.;  WIESCHER M.;  WISSHAK K.; 

2009-11-11

AMERICAN PHYSICAL SOC

JRC48735

0556-2813,   

http://link.aps.org/doi/10.1103/PhysRevC.80.044604,    https://publications.jrc.ec.europa.eu/repository/handle/JRC48735,   

10.1103/PhysRevC.80.044604,