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

Autor(en)

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

Abstrakt

The radiative capture cross section of a highly pure (99.999%), 6.125(2) grams and 9.56(5) x 10(-4) atoms/barn areal density U-238 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.

Organisation(en)

Isotopenphysik

Externe Organisation(en)

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, Roma, Charles University Prague, CEA Saclay, Atomic Energy & Alternative Energies Commission (CEA), Irfu, 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 Atom Res Ctr BARC, 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 , Università degli Studi di Bologna, Agenzia Nazl Nuove Tecnol Energia & Sviluppo Econ, Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN HH), 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

Band

96

Anzahl der Seiten

11

ISSN

0556-2813

DOI

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

Publikationsdatum

12-2017

Peer-reviewed

Ja

ÖFOS 2012

103014 Kernphysik

Schlagwörter

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/measurement-of-the-u238ngamma-cross-section-up-to-80-kev-with-the-total-absorption-calorimeter-at-the-cern-ntof-facility(6f498454-b33d-41e4-bb87-fc3b738a7c7e).html