2024-03-012024-03-012024-04Alcayne, V., Cano-Ott, D., Garcia, J., González-Romero, E., Martínez, T., Pérez de Rada, A.,...,Quesada Molina, J.M. (2024). A Segmented Total Energy Detector (sTED) optimized for (n, ) cross-section measurements at n_TOF EAR2. Radiation Physics and Chemistry, 217, 111525. https://doi.org/10.1016/j.radphyschem.2024.111525.0969-806X1879-0895https://hdl.handle.net/11441/155720The neutron time-of-flight facility n_TOF at CERN is a spallation source dedicated to measurements of neutron-induced reaction cross-sections of interest in nuclear technologies, astrophysics, and other applications. Since 2014, Experimental ARea 2 (EAR2) is operational and delivers a neutron fluence of neutrons per nominal proton pulse, which is 50 times higher than the one of Experimental ARea 1 (EAR1) of neutrons per pulse. The high neutron flux at EAR2 results in high counting rates in the detectors that challenged the previously existing capture detection systems. For this reason, a Segmented Total Energy Detector (sTED) has been developed to overcome the limitations in the detector’s response, by reducing the active volume per module and by using a photo-multiplier (PMT) optimized for high counting rates. This paper presents the main characteristics of the sTED, including energy and time resolution, response to -rays, and provides as well details of the use of the Pulse Height Weighting Technique (PHWT) with this detector. The sTED has been validated to perform neutron-capture cross-section measurements in EAR2 in the neutron energy range from thermal up to at least 400 keV. The detector has already been successfully used in several measurements at n_TOF EAR2.application/pdf11 p.engAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Neutron capturePHWTScintillation detectorsMonte Carlo simulationinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess10.1016/j.radphyschem.2024.111525