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Measurement and analysis of the Am 241 neutron capture cross section at the n-TOF facility at CERN

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  • E. Mendoza
  • D. Cano-Ott
  • S. Altstadt
  • S. Andriamonje
  • J. Andrzejewski
  • L. Audouin
  • J. Balibrea
  • V. Bécares
  • M. Barbagallo
  • F. Bečvář
  • F. Belloni
  • B. Berthier
  • E. Berthoumieux
  • J. Billowes
  • D. Bosnar
  • M. Brugger
  • F. Calviño
  • M. Calviani
  • C. Carrapiço
  • F. Cerutti
  • E. Chiaveri
  • M. Chin
  • N. Colonna
  • G. Cortés
  • M. A. Cortés-Giraldo
  • M. Diakaki
  • I. Dillmann
  • C. Domingo-Pardo
  • I. Durán
  • N. Dzysiuk
  • C. Eleftheriadis
  • A. Ferrari
  • K. Fraval
  • V. Furman
  • M. B. Gómez-Hornillos
  • S. Ganesan
  • A. R. García
  • G. Giubrone
  • I. F. Gonçalves
  • E. González
  • A. Goverdovski
  • F. Gramegna
  • E. Griesmayer
  • C. Guerrero
  • F. Gunsing
  • P. Gurusamy
  • T. Heftrich
  • D. G. Jenkins
  • M. J. Vermeulen
  • T. Wright
  • n-TOF Collaboration


Publication details

JournalPhysical Review C
DatePublished - 24 May 2018
Issue number5
Number of pages21
Original languageEnglish


The Am241(n,γ) cross section has been measured at the n-TOF facility at CERN with the n-TOF BaF2 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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