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Improved neutron capture cross section measurements with the n_TOF total absorption Cclorimeter Calviño Tavares, Francisco Cortés Rossell, Guillem Pere Gómez Hornillos, María Belén 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::Energies::Energia nuclear Nuclear energy Monte Carlo method Monte Carlo, Mètode de Energia nuclear The n TOF collaboration operates a Total Absorption Calorimeter (TAC) [1] for measuring neu- tron capture cross-sections of low-mass and/or radioactive samples. The results obtained with the TAC have led to a substantial improvement of the capture cross sections of 237Np and 240Pu [2]. The experience acquired during the rst measurements has allowed us to optimize the performance of the TAC and to improve the capture signal to background ratio, thus opening the way to more complex and demanding measurements on rare radioactive materials. The new design has been reached by a series of detailed Monte Carlo simulations of complete experiments and dedicated test measurements. The new capture setup will be presented and the main achievements highlighted. Postprint (published version) 2011-08-12 Article Calviño, F.; Cortes, G.; Gómez, M. Improved neutron capture cross section measurements with the n_TOF total absorption Cclorimeter. "Journal of the Korean Physical Society", 12 Agost 2011, vol. 59, núm. 2, p. 1813-1816. 0374-4884 https://hdl.handle.net/2117/13307 10.3938/jkps.59.1813 eng http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Restricted access - publisher's policy Attribution-NonCommercial-NoDerivs 3.0 Spain 4 p. application/pdf