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High-accuracy determination of the neutron flux at n_TOF

  • M. Barbagallo
  • , C. Guerrero
  • , A. Tsinganis
  • , D. Tarrio
  • , S. Altstadt
  • , S. Andriamonje
  • , J. Andrzejewski
  • , L. Audouin
  • , V. Becares
  • , F. Becvar
  • , F. Belloni
  • , E. Berthoumieux
  • , J. Billowes
  • , V. Boccone
  • , D. Bosnar
  • , M. Brugger
  • , M. Calviani
  • , F. Calvino
  • , D. Cano-Ott
  • , C. Carrapico
  • F. Cerutti, E. Chiaveri, M. Chin, N. Colonna, G. Cortes, M. A. Cortes-Giraldo, M. Diakaki, C. Domingo-Pardo, I. Duran, R. Dressler, N. Dzysiuk, C. Eleftheriadis, A. Ferrari, K. Fraval, S. Ganesan, A. R. Garcia, G. Giubrone, K. Goebel, M. B. Gomez-Hornillos, I. F. Goncalves, E. Gonzalez-Romero, E. Griesmayer, F. Gunsing, P. Gurusamy, A. Hernandez-Prieto, D. G. Jenkins, E. Jericha, Y. Kadi, F. Kaeppeler, D. Karadimos, N. Kivel, P. Koehler, M. Kokkoris, M. Krticka, J. Kroll, C. Lampoudis, C. Langer, E. Leal-Cidoncha, C. Lederer, H. Leeb, L. S. Leong, R. Losito, A. Manousos, J. Marganiec, T. Martinez, C. Massimi, P. F. Mastinu, M. Mastromarco, M. Meaze, E. Mendoza, A. Mengoni, P. M. Milazzo, F. Mingrone, M. Mirea, W. Mondalaers, T. Papaevangelou, C. Paradela, A. Pavlik, J. Perkowski, A. Plompen, J. Praena, J. M. Quesada, T. Rauscher, R. Reifarth, A. Riego, F. Roman, C. Rubbia, M. Sabate-Gilarte, R. Sarmento, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, P. Steinegger, G. Tagliente, J. L. Tain, L. Tassan-Got, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, R. Versaci, M. J. Vermeulen, V. Vlachoudis, R. Vlastou, A. Wallner, T. Ware, M. Weigand, C. Weiss, T. Wright, P. Zugec

Research output: Contribution to journalArticlepeer-review

76 Citations (Scopus)

Abstract

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 U-235 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.

Original languageEnglish
Article number156
Number of pages11
JournalEuropean Physical Journal A: Hadrons and Nuclei
Volume49
Issue number12
DOIs
Publication statusPublished - 18 Dec 2013

Keywords

  • FACILITY
  • CERN
  • STANDARDS
  • SCIENCE
  • BEAM

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