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Measurement of the U 238 (n,γ) cross section up to 80 keV with the total absorption calorimeter at the CERN n-TOF facility

 

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Opened Access Measurement of the U 238 (n,γ) cross section up to 80 keV with the total absorption calorimeter at the CERN n-TOF facility
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Author: Wright, T.
Billowes, Jon
Cano-Ott, D.
Mendoza, Emilio
Altstadt, Sebastian G.
Andrzejewski, J.
Guerrero Sánchez, Carlos
Audouin, Laurent
Bécares, Vicente
Cortés Giraldo, Miguel Antonio
Quesada Molina, José Manuel
Sabaté Gilarte, Marta
Department: Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Date: 2017
Document type: Article
Abstract: The radiative capture cross section of a highly pure (99.999%), 6.125(2) grams and 9.56(5)× 10−4 atoms/barn areal density 238U sample has been measured with the Total Absorption Calorimeter (TAC) in the 185 m flight path at the CERN neutron time-of-flight facility n_TOF. This measurement is in response to the NEA High Priority Request list, which demands an accuracy in this cross section of less than 3% below 25 keV. These data have undergone careful background subtraction, with special care being given to the background originating from neutrons scattered by the 238U sample. Pileup and dead-time effects have been corrected for. The measured cross section covers an energy range between 0.2 eV and 80 keV, with an accuracy that varies with neutron energy, being better than 4% below 25 keV and reaching at most 6% at higher energies.
Size: 820.8Kb
Format: PDF

URI: http://hdl.handle.net/11441/68948

DOI: 10.1103/PhysRevC.96.064601

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