CERN Accelerating science

Article
Report number arXiv:2403.11711
Title New insights on fission of $^{235}$U induced by high energy neutrons from a new measurement at n_TOF
Related titleNew insights on fission of $^{235}$U induced by high energy neutrons
Author(s)

Manna, A. (INFN, Bologna ; U. Bologna, DIFA) ; Pirovano, E. (Braunschweig, Phys. Tech. Bund.) ; Camprini, P. Console (ENEA, Casaccia ; INFN, Bologna) ; Cosentino, L. (INFN, Catania) ; Dietz, M. (Edinburgh U.) ; Ducasse, Q. (Braunschweig, Phys. Tech. Bund.) ; Finocchiaro, P. (INFN, Catania) ; Le Naour, C. (Orsay, IPN) ; Mancusi, D. (Saclay) ; Massimi, C. (INFN, Bologna ; U. Bologna, DIFA) ; Mengoni, A. (ENEA, Casaccia ; INFN, Bologna) ; Nolte, R. (Braunschweig, Phys. Tech. Bund.) ; Radeck, D. (Braunschweig, Phys. Tech. Bund.) ; Tassan-Got, L. (CERN ; Natl. Tech. U., Athens ; Orsay, IPN) ; Terranova, N. (ENEA, Casaccia) ; Vannini, G. (INFN, Bologna ; U. Bologna, DIFA) ; Ventura, A. (INFN, Bologna) ; Aberle, O. (CERN) ; Alcayne, V. (Madrid, CIEMAT) ; Amaducci, S. (INFN, Catania ; INFN, LNS ; Catania U.) ; Andrzejewski, J. (Lodz U.) ; Audouin, L. (Orsay, IPN) ; Babiano-Suarez, V. (Valencia U. ; Valencia U., IFIC) ; Bacak, M. (CERN ; HZDR, Dresden ; IRFU, Saclay) ; Barbagallo, M. (CERN ; INFN, Bari) ; Bennett, S. (Manchester U.) ; Berthoumieux, E. (IRFU, Saclay) ; Billowes, J. (Manchester U.) ; Bosnar, D. (Zagreb U., Phys. Dept.) ; Brown, A. (York U., England) ; Busso, M. (INFN, Perugia ; U. Perugia (main)) ; Caamaño, M. (Santiago de Compostela U.) ; Caballero-Ontanaya, L. (Valencia U. ; Valencia U., IFIC) ; Calviño, F. (Barcelona, Polytechnic U.) ; Calviani, M. (CERN) ; Cano-Ott, D. (Madrid, CIEMAT) ; Casanovas, A. (Barcelona, Polytechnic U.) ; Castelluccio, D.M. (ENEA, Casaccia ; INFN, Bologna) ; Cerutti, F. (CERN) ; Chiaveri, E. (CERN ; Manchester U.) ; Colonna, N. (INFN, Bari) ; Cortés, G. (Barcelona, Polytechnic U.) ; Cortés-Giraldo, M.A. (Seville U.) ; Cristallo, S. (Cagliari Observ. ; INFN, Perugia) ; Damone, L.A. (INFN, Bari ; Bari U.) ; Davies, P.J. (Manchester U.) ; Diakaki, M. (Natl. Tech. U., Athens ; CERN) ; Domingo-Pardo, C. (Valencia U. ; Valencia U., IFIC) ; Dressler, R. (PSI, Villigen) ; Dupont, E. (IRFU, Saclay) ; Durán, I. (Santiago de Compostela U.) ; Eleme, Z. (Ioannina U.) ; Fernández-Domínguez, B. (Santiago de Compostela U.) ; Ferrari, A. (CERN) ; Furman, V. (Unlisted) ; Göbel, K. (Goethe U., Frankfurt (main)) ; Garg, R. (Edinburgh U.) ; Gawlik-Ramięga, A. (Lodz U.) ; Gilardoni, S. (CERN) ; Gonçalves, I.F. (Lisbon, IST) ; González-Romero, E. (Madrid, CIEMAT) ; Guerrero, C. (Seville U.) ; Gunsing, F. (IRFU, Saclay) ; Harada, H. (JAEA, Ibaraki) ; Heinitz, S. (PSI, Villigen) ; Heyse, J. (Geel, JRC) ; Jenkins, D.G. (York U., England) ; Junghans, A. (HZDR, Dresden) ; Käppeler, F. (KIT, Karlsruhe, IKP) ; Kadi, Y. (CERN) ; Kimura, A. (JAEA, Ibaraki) ; Knapová, I. (Charles U.) ; Kokkoris, M. (Natl. Tech. U., Athens) ; Kopatch, Y. (Unlisted) ; Krtička, M. (Charles U.) ; Kurtulgil, D. (Goethe U., Frankfurt (main)) ; Ladarescu, I. (Valencia U. ; Valencia U., IFIC) ; Lederer-Woods, C. (Edinburgh U.) ; Leeb, H. (HZDR, Dresden) ; Lerendegui-Marco, J. (Seville U.) ; Lonsdale, S.J. (Edinburgh U.) ; Macina, D. (CERN) ; Martínez, T. (Madrid, CIEMAT) ; Masi, A. (CERN) ; Mastinu, P. (INFN, Legnaro) ; Mastromarco, M. (CERN) ; Maugeri, E.A. (PSI, Villigen) ; Mazzone, A. (INFN, Bari ; CNR, INO, Pisa) ; Mendoza, E. (Madrid, CIEMAT) ; Michalopoulou, V. (Natl. Tech. U., Athens ; CERN) ; Milazzo, P.M. (INFN, Trieste) ; Mingrone, F. (CERN) ; Moreno-Soto, J. (IRFU, Saclay) ; Musumarra, A. (INFN, Catania ; INFN, LNS ; Catania U.) ; Negret, A. (Bucharest, IFIN-HH) ; Ogállar, F. (Granada U.) ; Oprea, A. (Bucharest, IFIN-HH) ; Patronis, N. (Ioannina U.) ; Pavlik, A. (Vienna U.) ; Perkowski, J. (Lodz U.) ; Petrone, C. (Bucharest, IFIN-HH) ; Piersanti, L. (Cagliari Observ. ; INFN, Perugia) ; Porras, I. (Granada U.) ; Praena, J. (Granada U.) ; Quesada, J.M. (Seville U.) ; Ramos-Doval, D. (Orsay, IPN) ; Rauscher, T. (Basel U. ; Hertfordshire U.) ; Reifarth, R. (Goethe U., Frankfurt (main)) ; Rochman, D. (PSI, Villigen) ; Rubbia, C. (CERN) ; Sabaté-Gilarte, M. (Seville U. ; CERN) ; Saxena, A. (Bhabha Atomic Res. Ctr.) ; Schillebeeckx, P. (Geel, JRC) ; Schumann, D. (PSI, Villigen) ; Sekhar, A. (Manchester U.) ; Smith, A.G. (Manchester U.) ; Sosnin, N.V. (Manchester U.) ; Sprung, P. (PSI, Villigen) ; Stamatopoulos, A. (Natl. Tech. U., Athens) ; Tagliente, G. (INFN, Bari) ; Tain, J.L. (Valencia U. ; Valencia U., IFIC) ; Tarifeño-Saldivia, A. (Barcelona, Polytechnic U.) ; Thomas, Th. (Goethe U., Frankfurt (main)) ; Torres-Sánchez, P. (Granada U.) ; Tsinganis, A. (CERN) ; Ulrich, J. (PSI, Villigen) ; Urlass, S. (HZDR, Dresden ; CERN) ; Valenta, S. (Charles U.) ; Variale, V. (INFN, Bari) ; Vaz, P. (Lisbon, IST) ; Vescovi, D. (INFN, Perugia) ; Vlachoudis, V. (CERN) ; Vlastou, R. (Natl. Tech. U., Athens) ; Wallner, A. (Australian Natl. U., Canberra) ; Woods, P.J. (Edinburgh U.) ; Wright, T. (Manchester U.) ; Žugec, P. (Zagreb U., Phys. Dept.)

Publication 2024-12-20
Imprint 2024-03-18
Number of pages 8
In: Phys. Lett. B 860 (2025) 139213
DOI 10.1016/j.physletb.2024.139213 (publication)
Subject category nucl-ex ; Nuclear Physics - Experiment
Accelerator/Facility, Experiment CERN PS ; nTOF
Abstract The $^{235}$U(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. Two independent detection systems were used simultaneously to extract the fission cross section. For neutron energies below 200 MeV, the present results agree within one standard deviation with the data available in literature and are well reproduced by the IAEA evaluation. Above 200 MeV, the comparison of model calculations to the present data indicates the need to introduce a transient time in the description of the neutron-induced fission process in order to allow the simultaneous description of (n,f) and (p,f) reactions.
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