A Segmented Total Energy Detector (sTED) optimized for (n, ) cross-section measurements at n_TOF EAR2

The 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 fluenc...

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Detalles Bibliográficos
Autores: Alcayne, V., Cano-Ott, D., Garcia, J., González-Romero, E., Martínez, T., Pérez de Rada, A., n_TOF Collaboration (Autoría grupal), Cortés Giraldo, Miguel Antonio, Guerrero Sánchez, Carlos, Lerendegui Marco, Jorge, Pérez Maroto, Pablo, Quesada Molina, José Manuel, Pavón Rodríguez, J. A., Žugec, P.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/155720
Acceso en línea:https://hdl.handle.net/11441/155720
https://doi.org/10.1016/j.radphyschem.2024.111525
Access Level:acceso abierto
Palabra clave:Neutron capture
PHWT
Scintillation detectors
Monte Carlo simulation
Descripción
Sumario:The 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.

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