Measurement of the U-238(n,gamma) cross section up to 80 keV with the Total Absorption Calorimeter at the CERN n_TOF facility

Author(s)

T. Wright, C. Guerrero, J. Billowes, D. Cano-Ott, E. Mendoza, S. Altstadt, J. Andrzejewski, L. Audouin, V. Becares, M. Barbagallo, F. Becvar, F. Belloni, E. Berthoumieux, D. Bosnar, M. Brugger, F. Calvino, M. Calviani, C. Carrapico, F. Cerutti, E. Chiaveri, M. Chin, N. Colonna, G. Cortes, M. A. Cortes-Giraldo, M. Diakaki, M. Dietz, C. Domingo-Pardo, I. Duran, N. Dzysiuk, C. Eleftheriadis, A. Ferrari, K. Fraval, V. Furman, M. B. Gomez-Hornillos, S. Ganesan, A. R. Garcia, G. Giubrone, I. F. Goncalves, E. Gonzalez-Romero, A. Goverdovski, E. Griesmayer, F. Gunsing, P. Gurusamy, T. Heftrich, A. Hernandez-Prieto, D. G. Jenkins, E. Jericha, F. Kaeppeler, Y. Kadi, D. Karadimos, T. Katabuchi, V. Ketlerov, V. Khryachkov, P. Koehler, M. Kokkoris, J. Kroll, M. Krticka, C. Lampoudis, C. Langer, E. Leal-Cidoncha, Claudia Lederer, H. Leeb, L. S. Leong, J. Lerendegui-Marco, R. Losito, A. Manousos, J. Marganiec, T. Martinez, C. Massimi, P. Mastinu, A. Mengoni, P. M. Milazzo, F. Mingrone, M. Mirea, C. Paradela, A. Pavlik, J. Perkowski, J. Praena, J. M. Quesada, T. Rauscher, R. Reifarth, A. Riego-Perez, M. Robles, F. Roman, C. Rubbia, J. A. Ryan, M. Sabate-Gilarte, R. Sarmento, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, P. Sedyshev, G. Tagliente, J. L. Tain, A. Tarifeno-Saldivia, D. Tarrio, L. Tassan-Got, A. Tsinganis, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, M. J. Vermeulen, R. Versaci, V. Vlachoudis, R. Vlastou, A. Wallner, T. Ware, M. Weigand, C. Weiss, P. Zugec

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 U238 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 U238 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.

Organisation(s)

Isotope Physics

External organisation(s)

University of Manchester, European Organization for Nuclear Research (CERN), Universidad de Sevilla, Centro de Investigaciones Energeticas Medioambientales y Tecnológica, Johann Wolfgang Goethe-Universität Frankfurt am Main, University of Lodz, Université Paris XI - Paris-Sud, Centre National De La Recherche Scientifique (CNRS), Université Paris Saclay, Istituto Nazionale di Fisica Nucleare (INFN), Roma, Charles University Prague, IRFU CEA-Saclay laboratory , University of Zagreb, Universitat Politècnica de Catalunya, Universidade de Lisboa, National Technical University of Athens (NTUA), University of Edinburgh, Universitat de València, Universidade de Santiago de Compostela (USC), Aristotle University of Thessaloniki, Joint Institute for Nuclear Research, Bhabha Atomic Research Center, Institute of Physics and Power Engineering (IPPE), Technische Universität Wien, University of York, Karlsruher Institut für Technologie, Tokyo Institute of Technology (TIT), Oak Ridge National Laboratory , University of Bologna, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Universidad de Granada, Universität Basel, Commiss European Communities, Joint Res Ctr, Inst Reference Mat & Measurements, Paul Scherrer Institute, Australian National University

Journal

Physical Review C

Volume

96

No. of pages

11

ISSN

0556-2813

DOI

https://doi.org/10.1103/PhysRevC.96.064601

Publication date

12-2017

Peer reviewed

Yes

Austrian Fields of Science 2012

103014 Nuclear physics

Keywords

ASJC Scopus subject areas

Nuclear and High Energy Physics

Portal url

https://ucrisportal.univie.ac.at/en/publications/6f498454-b33d-41e4-bb87-fc3b738a7c7e