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Neutron capture cross section measurement of 238U at the n TOF CERN facility with C6D6 scintillation detectors in the energy region from 1 eV to 700 keV | | n_TOF Collaboration
; F. Mingrone
; C. Massimi
; G. Vannini
; N. Colonna
; F. Gunsing
; P. Žugec
; S. Altstadt
; J. Andrzejewski
; L. Audouin
; M. Barbagallo
; V. Bécares
; F. Bečvář
; F. Belloni
; E. Berthoumieux
; J. Billowes
; D. Bosnar
; M. Brugger
; M. Calviani
; F. Calviño
; D. Cano-Ott
; C. Carrapiço
; F. Cerutti
; E. Chiaveri
; M. Chin
; G. Cortés
; M.A. Cortés-Giraldo
; M. Diakaki
; C. Domingo-Pardo
; I. Duran
; R. Dressler
; C. Eleftheriadis
; A. Ferrari
; K. Fraval
; S. Ganesan
; A.R. García
; G. Giubrone
; I.F. Gonçalves
; E. González-Romero
; E. Griesmayer
; C. Guerrero
; A. Hernández-Prieto
; D.G. Jenkins
; E. Jericha
; Y. Kadi
; F. Käppeler
; D. Karadimos
; N. Kivel
; P. Koehler
; M. Kokkoris
; 1 M. Krtička
; J. Kroll
; C. Lampoudis
; C. Langer
; E. Leal-Cidoncha
; C. Lederer
; H. Leeb
; L.S. Leong
; S. Lo Meo
; R. Losito
; A. Mallick
; A. Manousos
; J. Marganiec
; T. Martínez
; P.F. Mastinu
; M. Mastromarco
; E. Mendoza
; A. Mengoni
; P.M. Milazzo
; M. Mirea
; W. Mondalaers
; C. Paradela
; A. Pavlik
; J. Perkowski
; A. Plompen
; J. Praena
; J.M. Quesada
; T. Rauscher
; R. Reifarth
; A. Riego
; M.S. Robles
; C. Rubbia
; M. Sabaté-Gilarte
; R. Sarmento
; A. Saxena
; P. Schillebeeckx
; S. Schmidt
; D. Schumann
; G. Tagliente
; J.L. Tain
; D. Tarrío
; L. Tassan-Got
; A. Tsinganis
; S. Valenta
; V. Variale
; P. Vaz
; A. Ventura
; M.J. Vermeulen
; V. Vlachoudis
; R. Vlastou
; A. Wallner
; T. Ware
; M. Weigand
; C. Weiß
; T. Wright
; | | Date: |
1 Dec 2016 | | Abstract: | The aim of this work is to provide a precise and accurate measurement of the
238U(n,g) reaction cross section in the energy region from 1 eV to 700 keV.
This reaction is of fundamental importance for the design calculations of
nuclear reactors, governing the behaviour of the reactor core. In particular,
fast reactors, which are experiencing a growing interest for their ability to
burn radioactive waste, operate in the high energy region of the neutron
spectrum. In this energy region most recent evaluations disagree due to
inconsistencies in the existing measurements of up to 15%. In addition, the
assessment of nuclear data uncertainty performed for innovative reactor systems
shows that the uncertainty in the radiative capture cross-section of 238U
should be further reduced to 1-3% in the energy region from 20 eV to 25 keV. To
this purpose, addressed by the Nuclear Energy Agency as a priority nuclear data
need, complementary experiments, one at the GELINA and two at the n_TOF
facility, were proposed and carried out within the 7th Framework Project ANDES
of the European Commission.
The results of one of these 238U(n,g) measurements performed at the n_TOF
CERN facility are presented in this work. The gamma-ray cascade following the
radiative neutron capture has been detected exploiting a setup of two C6D6
liquid scintillators. Resonance parameters obtained from this work are on
average in excellent agreement with the ones reported in evaluated libraries.
In the unresolved resonance region, this work yields a cross section in
agreement with evaluated libraries up to 80 keV, while for higher energies our
results are significantly higher. | | Source: | arXiv, 1612.0200 | | Services: | Forum | Review | PDF | Favorites | |
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