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

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

doi:10.1016/j.nima.2004.04.247

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

Lorusso G., Colonna N., Marrone S., Tagliente G., Heil M., Cano-Ott D., ...More

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, vol.532, no.3, pp.622-630, 2004 (SCI-Expanded, Scopus)

Publication Type: Article / Article
Volume: 532 Issue: 3
Publication Date: 2004
Doi Number: 10.1016/j.nima.2004.04.247
Journal Name: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Page Numbers: pp.622-630
Keywords: spallation neutron source, moderation distance, neutron capture cross sections, neutron energy standards
Bursa Uludag University Affiliated: No

Abstract

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.