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High-accuracy determination of the 238U/ 235U fission cross section ratio up to ˜ 1 GeV at n_TOF at CERN

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High-accuracy determination of the U238/U235 fission cross section ratio up to ≈1 GeV at n_TOF at CERN (1,442Mb)
 
10.1103/PhysRevC.91.024602
 
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hdl:2117/28483

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Paradela, C.
Calviani, Marco
Tarrío, D.
Calviño Tavares, FranciscoMés informacióMés informacióMés informació
Cortés Rossell, Guillem PereMés informacióMés informacióMés informació
Gómez Hornillos, María Belén
Pretel Sánchez, CarmeMés informacióMés informacióMés informació
Riego Pérez, AlbertMés informacióMés informacióMés informació
Document typeArticle
Defense date2015-02-09
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
ProjectCHANDA - solving CHAllenges in Nuclear DAta (EC-FP7-605203)
Abstract
The U238 to U235 fission cross section ratio has been determined at n_TOF up to ˜1 GeV, with two different detection systems, in different geometrical configurations. A total of four datasets has been collected and compared. They are all consistent to each other within the relative systematic uncertainty of 3–4%. The data collected at n_TOF have been suitably combined to yield a unique fission cross section ratio as a function of neutron energy. The result confirms current evaluations up to 200 MeV. Good agreement is also observed with theoretical calculations based on the INCL++/Gemini++ combination up to the highest measured energy. The n_TOF results may help solve a long-standing discrepancy between the two most important experimental datasets available so far above 20 MeV, while extending the neutron energy range for the first time up to ˜1 GeV.
CitationParadela, C. [et al.]. High-accuracy determination of the 238U/ 235U fission cross section ratio up to ˜ 1 GeV at n_TOF at CERN. "Physical review C", 09 Febrer 2015, vol. 91, p. 024602-1-024602-11. 
URIhttp://hdl.handle.net/2117/28483
DOI10.1103/PhysRevC.91.024602
ISSN0556-2813
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  • ANT - Advanced Nuclear Technologies Research Group - Articles de revista [133]
  • Departament de Física i Enginyeria Nuclear (fins octubre 2015) - Articles de revista [603]
  • NERG - Grup de Recerca d'Enginyeria Nuclear - Articles de revista [21]
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20150209_PhysRevC.91.024602.pdfHigh-accuracy determination of the U238/U235 fission cross section ratio up to ≈1 GeV at n_TOF at CERN1,442MbPDFView/Open

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