Published 2016 | Version v1
Book Metadata-only

High accuracy 235U(n,f) data in the resonance energy region

Creators

  • 1. Universidad de Santiago de Compostela, Santiago de Compostela (Spain)
  • 2. EC-JRC-IRMM, Retieseweg 111, 2440 Geel (Belgium)
  • 3. CNRS/IN2P3 - IPN, Orsay (France)
  • 4. Department of Physics and Astronomy, Uppsala University, Uppsala (Sweden)
  • 5. INFN, Bari (Italy)
  • 6. CEA, Centre de Saclay, Irfu/SPhN, Gif-sur-Yvette (France)
  • 7. CIEMAT, Madrid (Spain)
  • 8. University of Lodz, Lodz (Poland)
  • 9. Atominstitut der Oesterreichischen Universitaeten, Technische Universitaet Wien, Wien (Austria)
  • 10. CNRS/IN2P3 - IPHC, Strasbourg (France)
  • 11. Charles University, Prague (Czech Republic)
  • 12. Universitat Politecnica de Catalunya, Barcelona (Spain)
  • 13. CERN, Geneva (Switzerland)
  • 14. Universidad de Sevilla, Sevilla (Spain)
  • 15. Instituto Superior Tecnico/CTN, Universidade de Lisboa, Lisboa (Portugal)
  • 16. LIP-Coimbra,Coimbra (Portugal)
  • 17. Instituto Nazionale di Fisica Nucleare, Bari (Italy)
  • 18. Department of Physics and Astronomy, Uppsala University (Sweden)
  • 19. Karlsruhe Institute of Technology, Institut fuer Kernphysik, Campus North, Karlsruhe (Germany)
  • 20. Instituto de Fisica Corpuscular, CSIC-Universidad de Valencia, Valencia (Spain)
  • 21. Aristotle University of Thessaloniki, Thessalonidi (Greece)
  • 22. Instituto Nazionale di Fisica Nucleare, Trieste (Italy)
  • 23. Joint Institut for Nuclear Research, Frank Laboratory of Neutron Physics, Dubna (Russian Federation)
  • 24. IPPE, Obninsk (Russian Federation)
  • 25. Los Alamos National Laboratory, New Mexico (United States)
  • 26. Tokyo Institute of Technology, Tokyo (Japan)
  • 27. National Technical University of Athens - NTUA, Athens (Greece)
  • 28. Dipartimento di Fisica, Universita di Bologna, Bologna (Italy)
  • 29. Department of Physics and Astronomy, University of Basel, Basel (Switzerland)
  • 30. ENEA, Bologna (Italy)

Description

The 235U neutron-induced cross section is widely used as reference cross section for measuring other fission cross sections, but in the resonance region it is not considered as an IAEA standard because of the scarce experimental data covering the full region. In this work, we deal with a new analysis of the experimental data obtained with a detection setup based on parallel plate ionization chambers (PPACs) at the CERN n-TOF facility in the range from 1 eV to 10 keV. The relative cross section has been normalised to the IAEA value in the region between 7.8 and 11 eV, which is claimed as well-known. Its comparison with the last IAEA reference files and with the present version of the ENDF evaluation leads to the following conclusions: 1) there is very good agreement with the shape of the ENDF cross-section in the resolved resonance range, while showing a lower background; 2) the ENDF integral values, apart from a 2% difference in the normalisation value at 7.8-11.0 eV, show a sharp drop at the transition from the resolved to the unresolved resonance energy regions; And 3) There is a very good agreement with the IAEA integral-data set, provided that an offset of 0.09 barn is applied in the whole energy range

Availability note (English)

Available from doi: http://dx.doi.org/10.1051/epjconf/201611102003
Part of:
EPJ Web of Conferences, Proceedings of the 4. International Workshop On Nuclear Data Evaluation for Reactor Applications - WONDER-2015

Additional details

Identifiers

DOI
10.1051/epjconf/201611102003;

Publishing Information

Publisher
EDP Sciences
Imprint Place
Les Ulis (France)
ISBN
978-2-7598-1970-6
Imprint Title
EPJ Web of Conferences, Proceedings of the 4. International Workshop On Nuclear Data Evaluation for Reactor Applications - WONDER-2015
Imprint Pagination
v. 111 [270 p.]
Journal Page Range
p. 02003.p.1-02003.p.6

Conference

Title
4. International Workshop On Nuclear Data Evaluation for Reactor Applications
Acronym
WONDER-2015
Dates
5-8 Oct 2015
Place
Aix-en-Provence (France)

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
47094720
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS; S22: GENERAL STUDIES OF NUCLEAR REACTORS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
COMPARATIVE EVALUATIONS; EV RANGE 100-1000; EV RANGE 10-100; FISSION; INTEGRAL CROSS SECTIONS; KEV RANGE 01-10; NEUTRON REACTIONS; NUCLEAR DATA COLLECTIONS; RESONANCE; URANIUM 235
Descriptors DEC
ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; BARYON REACTIONS; CROSS SECTIONS; ENERGY RANGE; EV RANGE; EVALUATION; EVEN-ODD NUCLEI; HADRON REACTIONS; HEAVY NUCLEI; INTERNAL CONVERSION RADIOISOTOPES; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; KEV RANGE; MINUTES LIVING RADIOISOTOPES; NUCLEAR REACTIONS; NUCLEI; NUCLEON REACTIONS; RADIOISOTOPES; SPONTANEOUS FISSION RADIOISOTOPES; URANIUM ISOTOPES; YEARS LIVING RADIOISOTOPES

Optional Information

Notes
8 refs.
Collaborations
N-TOF Collaboration