High-accuracy determination of the neutron flux at n_TOF

The neutron flux of the n_TOF facility at CERN was measured, after installation of the new spallation target, with four different systems based on three neutron-converting reactions, which represent accepted cross sections standards in different energy regions. A careful comparison and combination of the different measurements allowed us to reach an unprecedented accuracy on the energy dependence of the neutron flux in the very wide range (thermal to 1 GeV) that characterizes the n_TOF neutron beam. This is a pre-requisite for the high accuracy of cross section measurements at n_TOF. An unexpected anomaly in the neutron-induced fission cross section of 235U is observed in the energy region between 10 and 30keV, hinting at a possible overestimation of this important cross section, well above currently assigned uncertainties.

BARBAGALLO M.;  GUERRERO C.;  TSINGANIS A.;  TARRIO D.;  ALTSTADT S.;  ANDRIAMONJE S.;  ANDRZEJEWSKI J.;  AUDOUIN L.;  BECVÁR F.;  BELLONI F.;  BERTHOUMIEUX E.;  CALVIANI M.;  CALVIÑO F.;  CANO-OTT D.;  CARRAPIÇO C.;  CHIAVERI E.;  COLONNA N.;  CORTES G.;  DOMINGO-PARDO C.;  DURAN I.;  ELEFTHERIADIS C.;  FERRARI A.;  GONZALEZ-ROMERO E.;  GONÇALVES I.;  GUNSING F.;  JERICHA E.;  KADI Y.;  KARADIMOS D.;  KOEHLER P.;  KRTICKA M.;  KÄPPELER F.;  LAMPOUDIS Christos;  LEEB H.;  MARGANIEC J.;  MARTÍNEZ T.;  MASSIMI C.;  MASTINU P.;  MEAZE M.;  MENGONI A.;  MILAZZO P. M.;  PARADELA C.;  PAVLIK Andreas;  PLOMPEN Arjan;  PRAENA J.;  QUESADA J.;  RAUSCHER T.;  REIFARTH R.;  TAGLIENTE G.;  TAIN J. L.;  TASSAN-GOT L.;  VANNINI G.;  VAZ P.;  VENTURA A.;  VLACHOUDIS V.;  VLASTOU R.;  BILLOWES J.;  BOCCONE V.;  BOSNAR D.;  BRUGGER M.;  CERUTTI F.;  CHIN M.;  CORTES-GIRALDO M. A.;  DIAKAKI M.;  DRESSLER R.;  DZYSIUK N.;  FRAVAL K.;  GANESAN S.;  GARCIA A. R.;  GIUBRONE G.;  GÖBEL K.;  GOMEZ-HORNILLOS M. B.;  GURUSAMY P.;  HERNÁNDEZ-PRIETO A.;  JENKINS D. G.;  KIVEL Niko;  KOKKORIS M.;  SCHUMANN D.;  STEINEGGER P.;  VALENTA S.;  VARIALE V.;  VERSACI R.;  VERMEULEN M.;  WALLNER A.;  WARE T.;  WEIGAND M.;  WRIGHT T. J.;  ZUGEC P.;  KROLL J.;  LANGER C.;  LEAL-CIDONCHA E.;  LEDERER C.;  LEONG L. S.;  LOSITO R.;  MANOUSOS A;  MASTROMARCO M.;  MENDOZA E.;  MINGRONE F.;  MIREA M.;  MONDELAERS Willy;  PAPAEVANGELOU T.;  PERKOWSKI J.;  RIEGO A.;  ROMAN F.;  SABATA-GILARTE M.;  SARMENTO R.;  SAXENA A.;  SCHILLEBEECKX Peter;  SCHMIDT S.;  GRIESMAYER E.;  WEISS C.;  RUBBIA C.;  BECARES V.; 

2014-01-13

SPRINGER

JRC84191

1434-6001,   

https://publications.jrc.ec.europa.eu/repository/handle/JRC84191,   

10.1140/epja/i2013-13156-x,