New insights on fission of ²³⁵U induced by high energy neutrons from a new measurement at n_TOF

Author(s)

, A. Manna, E. Pirovano, P. Console Camprini, L. Cosentino, M. Dietz, Q. Ducasse, P. Finocchiaro, C. Le Naour, D. Mancusi, C. Massimi, A. Mengoni, R. Nolte, D. Radeck, L. Tassan-Got, N. Terranova, G. Vannini, A. Ventura, O. Aberle, V. Alcayne, S. Amaducci, J. Andrzejewski, L. Audouin, V. Babiano-Suarez, M. Bacak, M. Barbagallo, S. Bennett, E. Berthoumieux, J. Billowes, D. Bosnar, A. Brown, M. Busso, M. Caamaño, L. Caballero-Ontanaya, F. Calviño, M. Calviani, D. Cano-Ott, A. Casanovas, D. M. Castelluccio, F. Cerutti, E. Chiaveri, N. Colonna, G. Cortés, M. A. Cortés-Giraldo, S. Cristallo, L. A. Damone, P. J. Davies, M. Diakaki, C. Domingo-Pardo, A. Pavlik, A. Wallner

Abstract

The 235U(n, f) reaction cross section was measured relative to neutron-proton elastic scattering for the first time in the energy region from 10 MeV to 440 MeV at the CERN n_TOF facility, extending the upper limit of the only previous measurement in the literature by more than 200 MeV. For neutron energies below 200 MeV, our results agree within one standard deviation with data in literature. Above 200 MeV, the comparison of model calculations to our data indicates the need to introduce a transient time in neutron-induced fission to allow the simultaneous description of (n, f) and (p, f) reactions.

Organisation(s)

Isotope Physics

External organisation(s)

Istituto Nazionale di Fisica Nucleare (INFN), Roma, University of Bologna, Physikalisch-Technische Bundesanstalt, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, University of Edinburgh, IPHC, DEN/DANS/DM2S/SERMA/LTSD, European Organization for Nuclear Research (CERN), National Technical University of Athens (NTUA), Centro de Investigaciones Energeticas Medioambientales y Tecnológica, Università degli Studi di Catania, University of Lodz, Universitat de València, Technische Universität Wien, Université Paris Saclay, University of Manchester, University of Zagreb, University of York, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Università degli Studi di Perugia, Universidade de Santiago de Compostela (USC), Universitat Politècnica de Catalunya, Universidad de Sevilla, INAF-Osservatorio Astrofisico di Torino, Università degli Studi di Bari Aldo Moro, Australian National University

Journal

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

Volume

860

No. of pages

8

ISSN

0370-2693

DOI

https://doi.org/10.1016/j.physletb.2024.139213

Publication date

01-2025

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/cf0f0727-5328-4c67-a76c-ffe08ccae504