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.; Álvarez‐Pol, H.; Álvarez‐Velarde, F.; Andriamonje, S.; Andrzejewski, J.; Angelopoulos, A.; Assimakopoulos, P.; Badurek, G.; Baumann, P.; Bečvář, F.; Benlliure, J.; Berthomieux, E.; Bisceglie, E.; Calviño, P.; Capote, R.; Cennini, P.; Chepel, V.; Chiaveri, E.; Coceva, C.; Cortés, G.; Cortina, D.; Couture, A.; Cox, James W.; Dababneh, S.; Dahlfors, M.; David, S.; Dolfini, R.; Domingo‐Pardo, C.; Durán, I.; Eleftheriadis, C.; Embid‐Segura, M.; Ferrant, L.; Ferrari, A.; Ferreira‐Marques, R.; Frais‐Köelbl, H.; Furman, W.; Gonçalves, I. F.; González‐Romero, E.; Goverdovski, A.; Gramegna, F.; Griesmayer, E.; Gunsing, F.; Haas, Brian J.; Haight, R. C.; Herrera-Martı́nez, A.; Ioannides, K. G.; Isaev, S.; Jericha, E.; Käppeler, F.; Kadi, Y.; Karamanis, D.; Ketlerov, V.; Kitis, G.; Koehler, P.; Konovalov, V.; Kossionides, E.; Krtička, M.; Leeb, H.; Lindote, A.; Lopes, I.; Lozano, M.; Lukić, S.; Marganiec, J.; Mastinu, P.; Milazzo, Paolo; Molina-Coballes, A.; Neves, F.; Oberhummer, H.; O’Brien, S.; Pancin, J.; Paradela, C.; Pavlik, A.; Pavlopoulos, P.; Perrot, L.; Peskov, V.; Plag, R.; Plompen, A.; Plukis, A.; Poch, A.; Policarpo, A.; Pretel, C.; Quesada, J.; Rapp, W.; Rauscher, T.; Reifarth, R.; Rosetti, M.; Rubbia, C.; Rudolf, G.; Rullhusen, P.; Salgado, J.; Savvidis, E.; Soares, J.C.; Stéphan, C.; Taín, J. L.; Tassan‐Got, L.; Tavora, L.; Terlizzi, R.; Tsangas, N.; Vannini, G.; Vaz, P.; Ventura, A.; Villamarı́n, D.; Vincente, M. C.; Vlachoudis, V.; Vlastou, R.; Voß, F.; Wendler, H.; Wiescher, M.; Wisshak, K.

doi:10.1016/j.nima.2004.04.247

Cited by 37 publications

(29 citation statements)

References 11 publications

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“…The relationship for converting TOF into neutron energy was accurately verified in the energy range from 1 eV to ∼1 MeV by means of specific capture resonances in 32 S, 193 Ir, and 238 U, which are accepted energy standards [24]. For each detector signal, the corresponding TOF is determined on an event-by-event basis with an accuracy of about 2 ns.…”

Section: A the N Tof Facilitymentioning

confidence: 90%

Au197(n,γ) cross section in the resonance region

Massimi¹,

Domingo‐Pardo²,

Vannini³

et al. 2010

Phys. Rev. C

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C. MASSIMI et al.PHYSICAL REVIEW C 81, 044616 (2010) The (n,γ ) cross section of 197 Au has been measured at n TOF in the resolved resonance region, up to 5 keV, with the aim of improving the accuracy in an energy range where it is not yet considered standard. The measurements were performed with two different experimental setup and detection techniques, the total energy method based on C 6 D 6 detectors, and the total absorption calorimetry based on a 4π BaF 2 array. By comparing the data collected with the two techniques, two accurate sets of neutron-capture yields have been obtained, which could be the basis for a new evaluation leading to an extended cross-section standard. Overall good agreement is found between the n TOF results and evaluated cross sections, with some significant exceptions for small resonances. A few resonances not included in the existing databases have also been observed.

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Section: A the N Tof Facilitymentioning

confidence: 90%

Au197(n,γ) cross section in the resonance region

Massimi¹,

Domingo‐Pardo²,

Vannini³

et al. 2010

Phys. Rev. C

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“…[27]) as well as with the 6 Li neutron flux monitors used during the experimental runs [18]. Additional flux measurements were performed by analysis of standard resonances [28]. Overall, the neutron flux could be determined with an uncertainty of 2%.…”

Section: Determination Of Capture Yieldsmentioning

confidence: 99%

TheZr92(n,γ) reaction and its implications for stellar nucleosynthesis

Tagliente¹,

Milazzo²,

Fujii³

et al. 2010

Phys. Rev. C

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Because the relatively small neutron capture cross sections of the zirconium isotopes are difficult to measure, the results of previous measurements are often not adequate for a number of problems in astrophysics and nuclear 0556-2813/2010/81(5)/055801 (9) 055801-1 ©2010 The American Physical Society G. TAGLIENTE et al.PHYSICAL REVIEW C 81, 055801 (2010) technology. Therefore, the 92 Zr(n,γ ) cross section has been remeasured at the CERN n TOF facility, providing a set of improved parameters for 44 resonances in the neutron energy range up to 40 keV. With this information the cross-section uncertainties in the keV region could be reduced to 5% as required for s-process nucleosynthesis studies and technological applications.

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“…[19], which is based on the neutron production mechanism in the spallation target and the subsequent moderation process [17], where the effective flight path is obtained via the well-known 235 U resonances.…”

Section: Discussionmentioning

confidence: 99%

Measurement of the neutron-induced fission cross-section of 241Am at the time-of-flight facility n_TOF

et al. 2013

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Abstract. The neutron-induced fission cross-section of 241 Am has been measured relative to the standard fission cross-section of 235 U between 0.5 and 20 MeV. The experiment was performed at the CERN n TOF facility. Fission fragments were detected by a fast ionization chamber by discriminating against the α-particles from the high radioactivity of the samples. The high instantaneous neutron flux and the low background of the n TOF facility enabled us to obtain uncertainties of ≈ 5%. With the present results it was possible to resolve discrepancies between previous data sets and to confirm current evaluations, thus providing important information for design studies of future reactors with improved fuel burn-up.

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

Cited by 37 publications

References 11 publications

Au197(n,γ) cross section in the resonance region

Au197(n,γ) cross section in the resonance region

TheZr92(n,γ) reaction and its implications for stellar nucleosynthesis

Measurement of the neutron-induced fission cross-section of 241Am at the time-of-flight facility n_TOF

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