CERN Accelerating science

Article
Title	Low-uncertainty measurement of the 239Pu(n,f) cross section at n_TOF in a very broad energy range from 0.02 eV up to 10 MeV
Related title	Low-uncertainty measurement of the $^{239}$Pu(n,f) cross section at n_TOF in a very broad energy range from 0.02 eV up to 10 MeV
Author(s)	Sánchez-Caballero, A (Madrid, CIEMAT) ; Cano-Ott, D (Madrid, CIEMAT) ; Mendoza, E (Madrid, CIEMAT) ; Alcayne, V (Madrid, CIEMAT) ; Andrzejewski, J (Lodz U.) ; Capote, R (IAEA, Vienna) ; Cardinaels, T (SCK-CEN, Mol) ; Dries, P (SCK-CEN, Mol) ; Pérez, J García (Madrid, CIEMAT) ; Gawlik-Ramięga, A (Lodz U.) ; González-Romero, E (Madrid, CIEMAT) ; Heyse, J (Geel, JRC) ; Leinders, G (SCK-CEN, Mol) ; Martínez, T (Madrid, CIEMAT) ; Noguere, G (CEA Cadarache) ; Paradela, C (Geel, JRC) ; De Rada Fiol, A Pérez (Madrid, CIEMAT) ; Perkowski, J (Lodz U.) ; Plompen, A (Geel, JRC) ; Schillebeeckx, P (Geel, JRC) ; Sibbens, G (Geel, JRC) ; Van Hecke, K (SCK-CEN, Mol) ; Vanleeuw, D (Geel, JRC) ; Verguts, K (SCK-CEN, Mol) ; Verwerft, M (SCK-CEN, Mol) ; Villamarin, D (Madrid, CIEMAT) ; Wynants, R (Geel, JRC) ; Aberle, O (CERN) ; Altieri, S (INFN, Pavia ; Pavia U.) ; Amaducci, S (INFN, Catania) ; Babiano-Suarez, V (Valencia U., IFIC ; Valencia U.) ; Bacak, M (CERN) ; Balibrea-Correa, J (Valencia U., IFIC ; Valencia U.) ; Beltrami, C (INFN, Pavia) ; Bennett, S (U. Manchester (main)) ; Bernardes, A P (CERN) ; Berthoumieux, E (IRFU, Saclay) ; Beyer, R (HZDR, Dresden) ; Boromiza, M (Bucharest, IFIN-HH) ; Bosnar, D (Zagreb U., Phys. Dept.) ; Caamaño, M (Santiago de Compostela U.) ; Calviño, F (Barcelona, Polytechnic U.) ; Calviani, M (CERN) ; Casanovas, A (Barcelona, Polytechnic U.) ; Castelluccio, D M (ENEA, Casaccia ; INFN, Bologna) ; Cerutti, F (CERN) ; Cescutti, G (INFN, Trieste ; Trieste U.) ; Chasapoglou, S (Natl. Tech. U., Athens) ; Chiaveri, E (CERN ; U. Manchester (main)) ; Colombetti, P (INFN, Turin ; Turin U.) ; Colonna, N (INFN, Bari) ; Camprini, P Console (INFN, Bologna ; ENEA, Casaccia) ; Cortés, G (Barcelona, Polytechnic U.) ; Cortés-Giraldo, M A (Seville U.) ; Cosentino, L (INFN, Catania) ; Cristallo, S (INFN, Perugia ; Palermo Observ.) ; Dellmann, S F (Goethe U., Frankfurt (main)) ; Diakaki, M (Natl. Tech. U., Athens) ; Di Castro, M (CERN) ; Dietz, M (Braunschweig, Phys. Tech. Bund.) ; Di Maria, S (Lisbon, IST) ; Domingo-Pardo, C (Valencia U., IFIC ; Valencia U.) ; Dressler, R (PSI, Villigen) ; Dupont, E (IRFU, Saclay) ; Durán, I (Santiago de Compostela U.) ; Eleme, Z (Ioannina U.) ; Fargier, S (CERN) ; Fernández, B (Seville U.) ; Fernández-Domínguez, B (Santiago de Compostela U.) ; Finocchiaro, P (INFN, Catania) ; Fiore, S (ENEA, Casaccia) ; Furman, V (Higher Sch. of Economics, Moscow) ; García-Infantes, F (Granada U. ; CERN) ; Gervino, G (INFN, Turin ; Turin U.) ; Gilardoni, S (CERN) ; Guerrero, C (Seville U.) ; Gunsing, F (IRFU, Saclay) ; Gustavino, C (INFN, Rome) ; Hillman, W (U. Manchester (main)) ; Jenkins, D G (York U., England) ; Jericha, E (HZDR, Dresden) ; Junghans, A (HZDR, Dresden) ; Kadi, Y (CERN) ; Kaperoni, K (Natl. Tech. U., Athens) ; Kaur, G (IRFU, Saclay) ; Kimura, A (JAEA, Ibaraki) ; Knapová, I (Charles U.) ; Kokkoris, M (Natl. Tech. U., Athens) ; Kopatch, Y (Higher Sch. of Economics, Moscow) ; Krtička, M (Charles U.) ; Kyritsis, N (Natl. Tech. U., Athens) ; Ladarescu, I (Valencia U., IFIC ; Valencia U.) ; Lederer-Woods, C (Edinburgh U.) ; Lerendegui-Marco, J (Valencia U., IFIC ; Valencia U.) ; Lerner, G (CERN) ; Manna, A (INFN, Bologna ; U. Bologna, DIFA) ; Masi, A (CERN) ; Massimi, C (INFN, Bologna ; U. Bologna, DIFA) ; Mastinu, P (INFN, Legnaro) ; Mastromarco, M (INFN, Bari ; Bari U.) ; Maugeri, E A (PSI, Villigen) ; Mazzone, A (INFN, Bari ; CNR, INO, Pisa) ; Mengoni, A (ENEA, Casaccia ; INFN, Bologna) ; Michalopoulou, V (Natl. Tech. U., Athens) ; Milazzo, P M (INFN, Trieste) ; Mucciola, R (INFN, Perugia ; U. Perugia (main)) ; Murtas, F (Frascati) ; González, E Musacchio (INFN, Legnaro) ; Musumarra, A (INFN, Catania ; INFN, LNS ; Catania U.) ; Negret, A (Bucharest, IFIN-HH) ; Patronis, N (Ioannina U. ; CERN) ; Pavón, J A (Seville U. ; CERN) ; Pellegriti, M G (INFN, Catania) ; Pérez-Maroto, P (Seville U.) ; Petrone, C (Bucharest, IFIN-HH) ; Pirovano, E (Braunschweig, Phys. Tech. Bund.) ; Del Olmo, J Plaza (Madrid, CIEMAT) ; Pomp, S (Uppsala U.) ; Porras, I (Granada U.) ; Praena, J (Granada U.) ; Quesada, J M (Seville U.) ; Reifarth, R (Goethe U., Frankfurt (main)) ; Rochman, D (PSI, Villigen) ; Romanets, Y (Lisbon, IST) ; Rubbia, C (CERN) ; Sabaté-Gilarte, M (CERN) ; Schumann, D (PSI, Villigen) ; Sekhar, A (U. Manchester (main)) ; Smith, A G (U. Manchester (main)) ; Sosnin, N V (Edinburgh U.) ; Stamati, M E (Ioannina U. ; CERN) ; Sturniolo, A (INFN, Turin) ; Tagliente, G (INFN, Bari) ; Tarifeño-Saldivia, A (Barcelona, Polytechnic U.) ; Tarrío, D (Uppsala U.) ; Torres-Sánchez, P (Granada U.) ; Urlass, S (HZDR, Dresden ; CERN) ; Vagena, E (Ioannina U.) ; Valenta, S (Charles U.) ; Variale, V (INFN, Bari) ; Vaz, P (Lisbon, IST) ; Vecchio, G (INFN, Catania) ; Vescovi, D (Goethe U., Frankfurt (main)) ; Vlachoudis, V (CERN) ; Vlastou, R (Natl. Tech. U., Athens) ; Wallner, A (HZDR, Dresden) ; Woods, P J (Edinburgh U.) ; Wright, T (U. Manchester (main)) ; Zarrella, R (INFN, Bologna ; U. Bologna, DIFA) ; Žugec, P (Zagreb U., Phys. Dept.)
Publication	2025
Number of pages	8
In:	Phys. Lett. B 872 (2026) 140070
DOI	10.1016/j.physletb.2025.140070 (publication)
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN PS ; nTOF
Abstract	The 239Pu(n,f) cross section was measured with uncertainties below 4 % from 20 meV up to 10 MeV of neutron energy at CERN’s n_TOF facility using a novel fission fragment detector with a 185.59 m flight path. Measured cross section was normalized to 1059(6) eV · b in the 9–20 eV energy range, and is consistent within uncertainties with the standard thermal value and the IAEA reference 239Pu(n,f) cross section. Experimental key values include the integral ratio I3/I1=41.20(42) defined by Duran et al. 2024 and the spectrum averaged cross section in 252Cf(sf) reference neutron field of 1802(40) mb.
Copyright/License	publication: © 2025-2026 The Author(s) (License: CC BY 4.0), sponsored by SCOAP³

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