Time-energy relation of the n_TOF neutron beam: energy standards revisited

G. Lorusso, N. Colonna, S. Marrone, G. Tagliente, M. Heil, D. Cano-Ott, M. Mosconi, C. Moreau, A. Mengoni, U. Abbondanno, G. Aerts, H. Alvarez-Pol, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, A. Angelopoulos, P. Assimakopoulos, G. Badurek, P. Baumann, F. BecvarJ. Benlliure, E. Berthomieux, E. Bisceglie, P. Calvino, R. Capote, P. Cennini, V. Chepel, E. Chiaveri, C. Coceva, G. Cortes, D. Cortina, A. Couture, J. Cox, S. Dababneh, M. Dahlfors, S. Davids, R. Dolfini, C. Domingo-Pardo, R.B. Duran, C. Eleftheriadis, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marques, H. Frais-Koelbl, W.I. Furman, I. F. Goncalves, E. Gonzalez-Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, F. Gunsing, B. Haas, R. Haight, A. Herrera-Martinez, K.G. Ioannides, S. Isaev, E. Jericha, F. Kappeler, Y. Kadi, D. Karamanis, V. Ketlerov, G. Kitis, P. E. Koehler, V. Konovalov, E. Kossionides, M. Krticka, H. Leeb, A. Lindote, M.I. Lopes, M. Lozano, S. Lukic, J. Marganiec, P. F. Mastinu, P.M. Milazzo, A. Molina-Coballes, F. Neves, H. Oberhummer, S. O'Brien, J. Pancin, C. Paradela, A. Pavlik, P. Pavlopoulos, L. Perrot, V. Peskov, R. Plag, A. Plompen, A. Plukis, A. Poch, A. Policarpo, C. Pretel, J. M. Quesada, W. Rapp, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, E. Savvidis, J. C. Soares, C. Stephan, J. L. Tain, L. Tassan-Got, L.M.N. Tavor, R. Terlizzi, N. Tsangas, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M.C. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, H. Wendler, M. Wiescher, K. Wisshak

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33 Citations (Scopus)


The accurate determination of neutron cross-sections as a function of the neutron energy at a time-of-flight facility requires a precise knowledge of the time-energy relation for the neutron beam. For the n-TOF neutron beam at CERN, produced by spallation of high-energy protons on a Pb target, the time-energy relation is connected to the production mechanism and to the subsequent moderation process. A calibration of the neutron energy scale is proposed based on detailed Monte Carlo simulations of the facility. This time-energy relation has been experimentally validated by means of dedicated measurements of standard energy resonances, from 1 eV to approximately 1 MeV. On the basis of the present measurements, it is proposed to correct the energy of the 1.3 eV resonance of 193 Ir, which is commonly considered as an energy standard. (C) 2004 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)622-630
Number of pages9
JournalNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number3
Publication statusPublished - 21 Oct 2004


  • neutron capture cross sections
  • moderation distance
  • neutron energy standards
  • spallation neutron source


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