EPJ Web of Conferences (Jan 2020)

Accurate measurement of the standard 235U(n,f) cross section from thermal to 170 keV neutron energy

  • Amaducci S.,
  • Aberle O.,
  • Andrzejewski J.,
  • Audouin L.,
  • Bacak M.,
  • Balibrea J.,
  • Barbagallo M.,
  • Bečvář F.,
  • Berthoumieux E.,
  • Billowes J.,
  • Bosnar D.,
  • Brown A.,
  • Caamaño M.,
  • Calviño F.,
  • Calviani M.,
  • Cano-Ott D,
  • Cardella R.,
  • Casanovas A.,
  • Cerutti F.,
  • Chen Y. H.,
  • Chiaveri E.,
  • Colonna N.,
  • Cortés G.,
  • Cortés-Girardo M. A.,
  • Cosentino L.,
  • Damone L. A.,
  • Diakaki M.,
  • Domingo-Pardo C,
  • Dressler R.,
  • Dupont E.,
  • Durán I.,
  • Fernández-Domínguez B.,
  • Ferrari A.,
  • Ferreira P.,
  • Finocchiaro P.,
  • Furman V.,
  • Göbel K.,
  • García A. R.,
  • Gawlik A.,
  • Gilardoni S.,
  • Glodariu T.,
  • Gonçalves I. F.,
  • González-Romero E.,
  • Griesmayer E.,
  • Guerrero C.,
  • Gunsing F.,
  • Harada H.,
  • Heinitz S.,
  • Heyse J.,
  • Jenkins D. G.,
  • Jericha E.,
  • Käppeler F.,
  • Kadi Y.,
  • Kalamara A.,
  • Kavrigin P.,
  • Kimura A.,
  • Kivel N.,
  • Knapova I.,
  • Kokkoris M.,
  • Krtička M.,
  • Kurtulgil D.,
  • Leal-Cidoncha E,
  • Lederer C.,
  • Leeb H.,
  • Lerendegui-Marco J,
  • Lo Meo S.,
  • Lonsdale S. J.,
  • Macina D.,
  • Manna A.,
  • Marganiec J.,
  • Martínez T.,
  • Masi A.,
  • Massimi C.,
  • Mastinu P.,
  • Mastromarco M.,
  • Maugeri E. A.,
  • Mazzone A.,
  • Mendoza E.,
  • Mengoni A.,
  • Milazzo P. M.,
  • Mingrone F.,
  • Musumarra A.,
  • Negret A.,
  • Nolte R.,
  • Oprea A.,
  • Patronis N.,
  • Pavlik A.,
  • Perkowski J.,
  • Porras I.,
  • Praena J.,
  • Quesada J. M.,
  • Radeck D.,
  • Rauscher T.,
  • Reifarth R.,
  • Rubbia C.,
  • Ryan J. A.,
  • Sabaté-Gilarte M.,
  • Saxena A.,
  • Schillebeeckx P.,
  • Schumann D.,
  • Sedyshev P.,
  • Smith A. G.,
  • Sosnin N. V.,
  • Stamatopoulos A.,
  • Tagliente G.,
  • Tain J. L.,
  • Tarifeño-Saldivia A.,
  • Tassan-Got L,
  • Valenta S.,
  • Vannini G.,
  • Variale V.,
  • Vaz P.,
  • Ventura A.,
  • Vlachoudis V.,
  • Vlastou R.,
  • Wallner A.,
  • Warren S.,
  • Weiss C.,
  • Woods P. J.,
  • Wright T.,
  • Žugec P.,

DOI
https://doi.org/10.1051/epjconf/202023908002
Journal volume & issue
Vol. 239
p. 08002

Abstract

Read online

An accurate measurement of the 235U(n,f) cross section from thermal to 170 keV of neutron energy has recently been performed at n_TOF facility at CERN using 6Li(n,t)4He and 10B(n,α)7Li as references. This measurement has been carried out in order to investigate a possible overestimation of the 235U fission cross section evaluation provided by most recent libraries between 10 and 30 keV. A custom experimental apparatus based on in-beam silicon detectors has been used, and a Monte Carlo simulation in GEANT4 has been employed to characterize the setup and calculate detectors efficiency. The results evidenced the presence of an overestimation in the interval between 9 and 18 keV and the new data may be used to decrease the uncertainty of 235U(n,f) cross section in the keV region.