Title: High accuracy determination of the 238U/235 U fission cross section ratio up to ≈ 1 GeV at n_TOF at CERN
Authors: PARADELA DOBARRO CARLOSCALVIANI M.TARRIO D.LEAL-CIDONCHA E.LEONG L. S.TASSAN-GOT L.LE NAOUR C.DURAN I.COLONNA N.AUDOUIN L.MASTROMARCO M.LO MEO S.VENTURA A.ALTSTADT S.ANDRZEJEWSKI J.BARBAGALLO M.BECARES V.Becvár F.BELLONI F.BERTHOUMIEUX E.BILLOWES J.BOCCONE V.BOSNAR D.BRUGGER M.CALVIÑO F.CANO-OTT D.CARRAPIÇO C.CERUTTI F.CHIAVERI E.CHIN M.CORTES G.CORTES-GIRALDO M. A.DIAKAKI M.DOMINGO-PARDO C.DRESSLER R.ELEFTHERIADIS C.FERRARI A.FRAVAL K.GANESAN S.GARCIA A. R.GIUBRONE G.GOMEZ-HORNILLOS M. B.GONZALEZ-ROMERO E.GONÇALVES I.GRIESMAYER E.GUERRERO C.GUNSING F.GURUSAMY P.JENKINS D. G.JERICHA E.KADI Y.KARADIMOS D.KÄPPELER F.KOKKORIS M.KIVEL NikoKROLL J.Krticka M.LANGER C.LEEB H.LOSITO R.MANOUSOS AMARGANIEC J.MARTÍNEZ T.MASSIMI C.MASTINU P.MENDOZA E.MENGONI A.MILAZZO P. M.MINGRONE F.MIREA M.MONDELAERS WillyPAVLIK AndreasPERKOWSKI J.PLOMPEN ArjanPRAENA J.QUESADA J.RAUSCHER T.REIFARTH R.RIEGO A.ROMAN F.RUBBIA C.SARMENTO R.SCHILLEBEECKX PeterSCHMIDT S.SCHUMANN D.TAGLIENTE G.TAIN J. L.TSINGANIS A.VALENTA S.VANNINI G.VARIALE V.VAZ P.VERMEULEN M.VERSACI R.VLACHOUDIS V.VLASTOU R.WALLNER A.WARE T.WEIGAND M.WEISS C.WRIGHT T. J.ZUGEC P.BERTHIER B.FERRANT L.ALVAREZ H.ALVAREZ-VELARDE F.ANDRIAMONJE S.BADUREK G.BAUMANN P.CAPOTE R.CENNINI P.COUTURE A.COX J.DAVID S.DILLMANN I.DRIDI W.EMBID-SEGURA M.FUJII K.FURMAN W.GRAMEGNA F.HAIGHT R.HEIL M.IGASHIRA M.KERVENO M.LOZANO M.MARRONE S.MOREAU C.MOSCONI M.O'BRIEN S.PERROT L.PLAG R.PLUKIS A.PRETEL C.RUDOLF G.SALGADO J.SANTOS C.SARCHIAPONE L.TAVORA L.TERLIZZI R.VILLAMARIN D.VINCENTE M. C.WALTER S.WIESCHER M.WISSHAK K.AERTS G.PAVLOPOULOS P.COSENTINO LuigiFINOCCHIARO PaoloGOVERDOVSKI A.HEINITZ S.ISAEV S.KARAMANIS D.KETLEROV V.KONOVALOV V.LAMPOUDIS C.LEDERER C.MUSUMARRA A.PANCIN J.PATRONIS N.PIGNI M. T.POCH A.RULLHUSEN PETERSAXENA A.STEPHAN C.VOSS F.
Citation: PHYSICAL REVIEW C vol. 91 no. 024602 p. 11
Publisher: AMER PHYSICAL SOC
Publication Year: 2015
JRC N°: JRC94723
ISSN: 0556-2813
URI: http://journals.aps.org/prc/abstract/10.1103/PhysRevC.91.024602
http://publications.jrc.ec.europa.eu/repository/handle/JRC94723
DOI: 10.1103/PhysRevC.91.024602
Type: Articles in periodicals and books
Abstract: The 238U to 23577 U fission cross section ratio has been determined at n_TOF up to 1 GeV, with two different detection systems, in different geometrical configurations. A total of four data sets has been collected and compared. They are all consistent to each other within the relative systematic uncertainty of 3-4%. The data collected at n_TOF have been suitably combined to yield a unique fission cross section ratio as a function of neutron energy. The result confirms current evaluations up to 200 MeV. Good agreement is also observed with theoretical calculations based on the INCL++/Gemini++ combination up to the highest measured energy. The n_TOF results may help solving a long-standing discrepancy between the two most important experimental datasets available so far above 20 MeV, while extending the neutron energy range for the first time up to 1 GeV.
JRC Directorate:Health, Consumers and Reference Materials

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