Para acceder a los documentos con el texto completo, por favor, siga el siguiente enlace: http://hdl.handle.net/2117/10627

Measurement of the neutron capture cross section of 234-U in n TOF at CERN
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
Accurate and reliable neutron capture cross sections are needed in many research areas, including stellar nucleosynthesis, advanced nuclear fuel cycles, waste transmutation, and other applied programs. In particular, the accurate knowledge of 234U(n, ) reaction cross section is required for the design and realization of nuclear power stations based on the thorium fuel cycle. We have measured the neutron capture cross section of 234U at the recently constructed neutron time-of-flight facility n TOF at CERN [2] in the energy range from 0.03 eV to 1 MeV with high accuracy due to a combination of features unique in the world: A high instantaneous neutron fluence and excellent energy resolution of the n TOF facility, an innovative Data Acquisition System based on flash ADCs [3] and the use of a high performance 4 BaF2 Total Absorption Calorimeter (TAC) as a detection device [4, 5]. In this paper, we will describe the experimental apparatus including the various TAC components and its performance. We also will present results from the 234U(n, ) measurement. A sample of 38.7 mg of 234U3O8 was pressed into a pellet and doubly encapsulated between Al and Ti foils which were 0.15 mm and 0.2 mm thick, respectively. Monte-Carlo simulations with GEANT4 [6] of the detector response have been performed. After the background subtraction and correction with dead time and pile-up, the capture yield from 0.03 eV up to 1.5 keV was derived. Preliminary analysis of the capture yield in terms of R-matrix resonance parameters is discussed.
Àrees temàtiques de la UPC::Física
Neutron cross sections
Calorimeters
Neutrons -- Seccions
Calorimetria
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
         

Mostrar el registro completo del ítem

Documentos relacionados

Otros documentos del mismo autor/a

Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme
Lopes, I.; Rudolf, G.; Lorusso, G.; Pretel Sánchez, Carme; Milazzo, P.M.; Benlliure, J.; Koehler, P.; Abbondanno, U.; Konovalov, V.; Aerts, G.; Krticka, M.; Álvarez-Velarde, F.; Lamboudis, C.; Alvarez-Pol, H.; Leeb, H.; Andriamonje, S.; Lindote, A.; Andrzejewski, J.; Baumann, P.; Becvar, F.; Ketlerov, V.; Kerveno, M.; Karadimos, D.; Kadi, Y.; Herrera-Martinez, A.; Herrera-Martinez, A.; Haight, Y.; Heil, M.; Kappeler, F.; Isaev, S.; Jericha, E.; Griesmaye, E.; Haas, B.; Gunsing, F.; Gallino, R.; Gonzalez-Romero, E.; Goverdovski, A.; Gramegna, F.; Ferreira-Marques, R.; Frais-Koelbl, H.; Furman, W.; Goncalves, I.; Ferrari, A.; Ferrant, L.; Embid-Segura, M.; Domingo-Pardo, C.; Duran, I.; David, S.; Dolfini, R.; Dababneh, S.; Dahlfors, N.; Couture, A.; Cox, J.; Poch Parés, Agustí; Wisshak, K.; Wiescher, M.; Vlachoudis, V.; Voss, F.; Plompen, A.; Wendler, H.; Ventura, A.; Villamarin, D.; Vincente, M.C.; Terlizzi, R.; Papaevangelou, T.; Vaz, P.; Vannini, G.; Cortés Rossell, Guillem Pere; Colonna, N.; Cennini, P.; Tassan-Got, L.; Chiaveri, E.; Tavora, L.; Chepel, V.; Tain, J.L.; Capote, R.; Rosetti, N.; Cano-Ott, D.; Reifarth, R.; Calviño Tavares, Francisco; Tagliente, G.; Badurek, G.; Berthoumieux, E.; Cortina, D.; Stephan, C.; Soares, J.C.; Rapp, W.; Salgado, J.; Rullhusen, P.
Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Pretel Sánchez, Carme; Poch Parés, Agustí
Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme
Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme