https://doi.org/10.1051/epjconf/201714611054
The 236U neutron capture cross-section measured at the n_TOF CERN facility
1 Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
2 University of York, UK
3 Goethe University Frankfurt, Germany
4 University of Lodz, Poland
5 Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
6 Centro de Investigaciones Energeticas Medioambientales y Tecnológicas (CIEMAT), Spain
7 Charles University, Prague, Czech Republic
8 CEA Saclay, Irfu, Gif-sur-Yvette, France
9 University of Manchester, UK
10 University of Zagreb, Croatia
11 European Organization for Nuclear Research (CERN), Switzerland
12 Universitat Politècnica de Catalunya, Spain
13 Instituto Superior Técnico, Lisbon, Portugal
14 Universidad de Sevilla, Spain
15 National Technical University of Athens, Greece
16 Instituto de Física Corpuscular, Universidad de Valencia, Spain
17 University of Santiago de Compostela, Spain
18 Istituto Nazionale di Fisica Nucleare, Sezione di Legnaro, Italy
19 Aristotle University of Thessaloniki, Thessaloniki, Greece
20 Joint Institute for Nuclear Research (JINR), Dubna, Russia
21 Bhabha Atomic Research Centre (BARC), India
22 Institute of Physics and Power Engineering (IPPE), Obninsk, Russia
23 Technische Universität Wien, Austria
24 Paul Scherrer Institut (PSI), Villingen, Switzerland
25 European Commission, Joint Research Centre, Geel, Retieseweg 111, 2440 Geel, Belgium
26 Karlsruhe Institute of Technology, Campus North, IKP, 76021 Karlsruhe, Germany
27 Tokyo Institute of Technology, Japan
28 Oak Ridge National Laboratory (ORNL), Oak Ridge, TN 37831, USA
29 University of Vienna, Faculty of Physics, Vienna, Austria
30 Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
31 Dipartimento di Fisica e Astronomia, Università di Bologna, Italy
32 Agenzia nazionale per le nuove tecnologie (ENEA), Bologna, Italy
33 Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Italy
34 Horia Hulubei National Institute of Physics and Nuclear Engineering, Romania
35 Department of Physics, University of Basel, Switzerland
36 Australian National University, Canberra, Australia
a e-mail: mario.mastromarco@ba.infn.it
Published online: 13 September 2017
The 236U isotope plays an important role in nuclear systems, both for future and currently operating ones. The actual knowledge of the capture reaction of this isotope is satisfactory in the thermal region, but it is considered insufficient for Fast Reactor and ADS applications. For this reason the 236U(n, γ) reaction cross-section has been measured for the first time in the whole energy region from thermal energy up to 1 MeV at the n_TOF facility with two different detection systems: an array of C6D6 detectors, employing the total energy deposited method, and a FX1 total absorption calorimeter (TAC), made of 40 BaF2 crystals. The two n_TOF data sets agree with each other within the statistical uncertainty in the Resolved Resonance Region up to 800 eV, while sizable differences (up to ≃ 20%) are found relative to the current evaluated data libraries. Moreover two new resonances have been found in the n_TOF data. In the Unresolved Resonance Region up to 200 keV, the n_TOF results show a reasonable agreement with previous measurements and evaluated data.
© The Authors, published by EDP Sciences, 2017
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