THE Am-243 NEUTRON CAPTURE MEASUREMENT AT THE n_TOF FACILITY

Mendoza, E.; Cano‐Ott, D.; Guerrero, C.; Álvarez‐Velarde, F.; García-Rios, A.; González‐Romero, E.; Martínez, T.; Villamarı́n, D.; Kadi, Y.; Colonna, N.; Marrone, S.; Meaze, M.; Tagliente, G.; Terlizzi, R.; Abbondanno, U.; Belloni, F.; Fujii, K.; Milazzo, Paolo; Moreau, C.; Andriamonje, S.; Calviani, M.; Vlachoudis, V.; Chiaveri, E.; Andrzejewski, J.; Marganiec, J.; Assimakopoulos, P.; Karadimos, D.; Karamanis, D.; Papachristodoulou, C.; Patronis, N.; Audouin, L.; David, S.; Ferrant, L.; Isaev, S.; Stéphan, C.; Tassan‐Got, L.; Badurek, G.; Jericha, E.; Leeb, H.; Oberhummer, H.; Pigni, Marco T.; Poch, A.; Baumann, P.; Kerveno, M.; Lukić, S.; Rudolf, G.; Bečvář, F.; Krtička, M.; Calviño, F.; Capote, R.; Frais‐Köelbl, H.; Griesmayer, E.; Mengoni, A.; Lozano, M.; Quesada, J.; Albornoz, A. Carrillo de; Tavora, L.; Marques, L.; Salgado, J.; Vaz, P.; Cennini, P.; Dahlfors, M.; Ferrari, Andrea C.; Gramegna, F.; Herrera-Martı́nez, A.; Mastinu, P.; Praena, J.; Sarchiapone, L.; Wendler, H.; Chepel, V.; Ferreira‐Marques, R.; Gonçalves, I. F.; Lindote, A.; Lopes, I.; Neves, F.; Berthoumieux, E.; Dridi, W.; Gunsing, F.; Aerts, G.; Pancin, J.; Perrot, L.; Plukis, A.; Cortés, G.; Pretel, C.; Couture, A.; Cox, J.; O'Brien, Sean G.; Wiescher, M.; Dillman, I.; Heil, M.; Käppeler, F.; Mosconi, M.; Plag, R.; Voß, F.; Walter, S.; Wisshak, K.; Dolfini, R.; Rubbia, C.; Pardo, C. Domingo; Taín, J. L.; Eleftheriadis, C.; Lampoudis, C.; Savvidis, I.; Furman, W.; Konovalov, V.; Goverdovski, A.; Ketlerov, V.; Durán, I.; Paradela, C.; Álvarez, H.; Haas, B.; Haight, R. C.; Reifarth, R.; Igashira, M.; Koehler, P.; Kossionides, E.; Massimi, C.; Vannini, G.; Oshima, M.; Papadopoulos, C.; Vlastou, R.; Pavlik, A.; Pavlopoulos, P.; Plompen, A.; Rullhusen, P.; Rauscher, T.; Rosetti, M.; Ventura, A.

doi:10.1142/9789814383646_0060

Cited by 3 publications

(3 citation statements)

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“…For the estimation of the uncertainties in the detection efficiencies two main components were considered, as described in Refs. [38][39][40]: one related to the generation of capture cascades and other related to the uncertainties of the TAC geometry. The first component was estimated by performing multiple simulations with different EM deexcitation patterns for the capture cascades and observing when the simulated spectra deviate from the experimental data.…”

Section: B Detection Efficiencymentioning

confidence: 99%

Measurement and analysis of theAm241neutron capture cross section at the n_TOF facility at CERN

Mendoza¹,

Cano‐Ott²,

Altstadt³

et al. 2018

Phys. Rev. C

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The 241 Am(n,γ ) cross section has been measured at the n_TOF facility at CERN with the n_TOF BaF 2 Total Absorption Calorimeter in the energy range between 0.2 eV and 10 keV. Our results are analyzed as resolved resonances up to 700 eV, allowing a more detailed description of the cross section than in the current evaluations, which contain resolved resonances only up to 150-160 eV. The cross section in the unresolved resonance region is perfectly consistent with the predictions based on the average resonance parameters deduced from the resolved resonances, thus obtaining a consistent description of the cross section in the full neutron energy range under study. Below 20 eV, our results are in reasonable agreement with JEFF-3.2 as well as with the most recent direct measurements of the resonance integral, and differ up to 20-30% with other experimental data. Between 20 eV and 1 keV, the disagreement with other experimental data and evaluations gradually decreases, in general, with the neutron energy. Above 1 keV, we find compatible results with previously existing values.

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Section: B Detection Efficiencymentioning

confidence: 99%

Measurement and analysis of theAm241neutron capture cross section at the n_TOF facility at CERN

Mendoza¹,

Cano‐Ott²,

Altstadt³

et al. 2018

Phys. Rev. C

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“…The estimation of the uncertainty in the efficiency was performed taking into account uncertainties in the generation of the cascades and uncertainties in the simulated TAC geometry. More details can be found in [52,53].…”

Section: B Detection Efficiency and Determination Of The Sample Actimentioning

confidence: 99%

Measurement and analysis of theAm243neutron capture cross section at the n_TOF facility at CERN

Mendoza¹,

Cano‐Ott²,

Guerrero³

et al. 2014

Phys. Rev. C

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Background: The design of new nuclear reactors and transmutation devices requires to reduce the present neutron cross section uncertainties of minor actinides.Purpose: Reduce the 243 Am(n,γ) cross section uncertainty. Method:The 243 Am(n,γ) cross section has been measured at the n TOF facility at CERN with a BaF 2 Total Absorption Calorimeter, in the energy range between 0.7 eV and 2.5 keV.Results: The 243 Am(n,γ) cross section has been successfully measured in the mentioned energy range. The resolved resonance region has been extended from 250 eV up to 400 eV. In the unresolved resonance region our results are compatible with one of the two incompatible capture data sets available below 2.5 keV. The data available in EXFOR and in the literature has been used to perform a simple analysis above 2.5 keV. Conclusions:The results of this measurement contribute to reduce the 243 Am(n,γ) cross section uncertainty and suggest that this cross section is underestimated up to 25% in the neutron energy range between 50 eV and a few keV in the present evaluated data libraries. PACS numbers: 25.40.Lw,28.20.Np,27.90.+b 4

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Section: B Detection Efficiency and Determination Of The Sample Activitymentioning

confidence: 99%

Measurement and analysis of the Am-243 neutron capture cross section at the n_TOF facility at CERN

Mendoza,

Cano-Ott,

Guerrero

et al. 2014

Preprint

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Background: The design of new nuclear reactors and transmutation devices requires to reduce the present neutron cross section uncertainties of minor actinides.Purpose: Reduce the 243 Am(n,γ) cross section uncertainty.Method: The 243 Am(n,γ) cross section has been measured at the n TOF facility at CERN with a BaF 2 Total Absorption Calorimeter, in the energy range between 0.7 eV and 2.5 keV. Results:The 243 Am(n,γ) cross section has been successfully measured in the mentioned energy range. The resolved resonance region has been extended from 250 eV up to 400 eV. In the unresolved resonance region our results are compatible with one of the two incompatible capture data sets available below 2.5 keV. The data available in EXFOR and in the literature has been used to perform a simple analysis above 2.5 keV. Conclusions:The results of this measurement contribute to reduce the 243 Am(n,γ) cross section uncertainty and suggest that this cross section is underestimated up to 25% in the neutron energy range between 50 eV and a few keV in the present evaluated data libraries.

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THE Am-243 NEUTRON CAPTURE MEASUREMENT AT THE n_TOF FACILITY

Cited by 3 publications

References 0 publications

Measurement and analysis of theAm241neutron capture cross section at the n_TOF facility at CERN

Measurement and analysis of theAm241neutron capture cross section at the n_TOF facility at CERN

Measurement and analysis of theAm243neutron capture cross section at the n_TOF facility at CERN

Measurement and analysis of the Am-243 neutron capture cross section at the n_TOF facility at CERN

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