Measurement of the 235U(n,f) cross section relative to the 10B(n,α) reaction with Micromegas detectors at the CERN n_TOF facility: First results
Authors: Michalopoulou Veatriki , Diakaki Maria , Vlastou Rosa , Kokkoris Michael , Stamatopoulos Athanasios , Tsinganis Andrea , Eleme Zinovia , Patronis Nikolas , Heyse Jan , Schillebeeckx Peter , Tassan-Got Laurent , Barbagallo Massimo , Colonna Nicola , Urlass Sebastian , Macina Daniela , Chiaveri Enrico , Aberle Oliver , Alcayne Victor , Amaducci Simone , Andrzejewski Józef , Audouin Laurent , Babiano-Suarez Victor , Bacak Michael , Bennett Samuel , Berthoumieux Eric , Billowes Jon , Bosnar Damir , Brown Adam , Busso Maurizio , Caamaño Manuel , Caballero-Ontanaya Luis , Calviño Francisco , Calviani Marco , Cano-Ott Daniel , Casanovas Adria , Cerutti Francesco , Cortés Guillem , Cortés-Giraldo Miguel , Cosentino Luigi , Cristallo Sergio , Damone Lucia-Anna , Davies Paul-John , Dietz Mirco , Domingo-Pardo César , Dressler Rugard , Ducasse Quentin , Dupont Emmeric , Durán Ignacio , Fernández-Domínguez Beatriz , Ferrari Alfredo , Finocchiaro Paolo , Göbel Kathrin , Garg Ruchi , Gawlik-Ramięga Aleksandra , Gilardoni Simone , Gonçalves Isabel , González-Romero Enrique , Guerrero Carlos , Gunsing Frank , Harada Hideo , Heinitz Stephan , Jenkins David , Junghans Arnd , Käppeler† Franz , Kadi Yacine , Kimura Atsushi , Knapová Ingrid , Krtička Milan , Kurtulgil Deniz , Ladarescu Ion , Lederer-Woods Claudia , Leeb Helmut , Lerendegui-Marco Jorge , Lonsdale Sarah-Jane , Manna Alice , Martínez Trinitario , Masi Alessandro , Massimi Cristian , Mastinu Pierfrancesco , Mastromarco Mario , Maugeri Emilio-Andrea , Mazzone Annamaria , Mendoza Emilio , Mengoni Alberto , Milazzo Paolo , Mingrone Federica , Moreno-Soto Javier , Musumarra Agatino , Negret Alexandru , Nolte Ralf , Ogállar Francisco , Oprea Andreea , Pavlik Andreas , Perkowski Jarosław , Piersanti Luciano , Petrone Cristina , Pirovano Elisa , Porras Ignacio , Praena Javier , Quesada José-Manuel , Ramos-Doval Diego , Rauscher Thomas , Reifarth René , Rochman Dimitri , Rubbia Carlo , Sabaté-Gilarte Marta , Saxena Alok , Schumann Dorothea , Sekhar Adhitya , Smith Gavin , Sosnin Nikolay , Sprung Peter , Tagliente Giuseppe , Tain José , Tarifeño-Saldivia Ariel , Thomas Benedikt , Torres-Sánchez Pablo , Ulrich Jiri , Valenta Stanislav , Vannini Gianni , Variale Vincenzo , Vaz Pedro , Ventura Alberto , Vescovi Diego , Vlachoudis Vasilis , Wallner Anton , Woods Philip-John , Wright Tobias , Žugec Petar ,   The n_TOF Collaboration (www.cern.ch/ntof)
Published: May 2023

Neutron cross section measurements are often made relative to a neutron cross section standard. Thus, the accuracy of the neutron standards determines the best possible accuracy of the neutron measurements. The 235U(n,f) cross section is widely used as reference, while it is considered a standard at thermal point and between 0.15 to 200 MeV. For this reason, additional cross section data for the 235U(n,f) reaction are useful in order to improve the accuracy and to extend the energy range of the standard. In this work, preliminary results of the measurement of the 235U(n,f) cross-section relative to the standard 10B(n,a) reaction are presented. The high accuracy measurement was performed at the experimental area EAR-1 of the n_TOF facility at CERN, aiming at covering the energy range from the thermal region up to approximately 100 keV. The samples were produced at JRC-Geel in Belgium, while the experimental setup was based on Micromegas detectors.