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oai:recercat.cat:2117/106222026-02-11T06:17:31Zcom_2072_1033col_2072_452950

The 234U neutron capture cross section measurement at the n TOF facility Calviño Tavares, Francisco Cortés Rossell, Guillem Pere Poch Parés, Agustí Pretel Sánchez, Carme Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions Àrees temàtiques de la UPC::Física Neutron cross sections Calorimetry R-matrices Neutrons -- Seccions Calorimetria Física nuclear The neutron capture cross-section of 234U has been measured for energies from thermal up to the keV region in the neutron time-of-flight facility n TOF, based on a spallation source located at CERN. A 4π BaF2 array composed of 40 crystals, placed at a distance of 184.9 m from the neutron source, was employed as a total absorption calorimeter (TAC) for detection of the prompt γ-ray cascade from capture events in the sample. This text describes the experimental setup, all necessary steps followed during the data analysis procedure. Results are presented in the form of R-matrix resonance parameters from fits with the SAMMY code and compared to the evaluated data of ENDF in the relevant energy region, indicating the good performance of the n TOF facility and the TAC. Postprint (published version) 2007 Conference report Calviño, F. [et al.]. The 234U neutron capture cross section measurement at the n TOF facility. A: International Conference on Nuclear Data for Science and Technology. "2007 International Conference on Nuclear Data for Science and Technology". Nice: EDP Sciences, 2007, p. 595-598. 978-2-7598-0090-2 https://hdl.handle.net/2117/10622 10.1051/ndata:07510 eng http://nd2007.edpsciences.org/articles/ndata/pdf/2007/01/ndata07510.pdf http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access Attribution-NonCommercial-NoDerivs 3.0 Spain 4 p. application/pdf EDP Sciences