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Ara es mostren els items 62-81 de 240

    • High precision measurement of the radiative capture cross section of 238U at the n TOF CERN facility 

      Mingrone, Federica; Altstadt, Sebastian; Andrzejewski, Józef; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Gómez Hornillos, María Belén; Riego Pérez, Albert (EDP Sciences, 2016)
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      The importance of improving the accuracy on the capture cross-section of 238U has been addressed by the Nuclear Energy Agency, since its uncertainty significantly affects the uncertainties of key design parameters for both ...

    • High-accuracy 233U(n, f ) cross-section measurement at the white-neutron source n TOF from near-thermal to 1 MeV neutron energy 

      Sarchiapone, L.; Savvidis, I.; Konovalov, V.; Stephan, C.; Tagliente, G.; Krticka, M.; Rudolf, G.; Kossionides, E.; Rullhusen, P.; Leeb, H.; Salgado, J.; Capote, R.; Cano-Ott, D.; Mengoni, A.; Calviño Tavares, Francisco; Milazzo, P.M.; Berthoumieux, E.; Massimi, C.; Berthier, B.; Mastinu, P.; Belloni, F.; Lampoudis, C.; Marrone, S.; Becvár, F.; Martínez, T.; Baumann, P.; Badurek, G.; Audouin, L.; Carrapiço, C.; Marganiec, J.; Lukic, S.; Lozano, M.; Santos, C.; Lopes, I.; Lindote, A.; Taín Enríquez, José Luis; Tassan-Got, L.; Assimakopoulos, P.A.; Kadi, Y.; Calviani, M.; Karadimos, D.; Praena, J.; Karamanis, D.; Abbondanno, U.; Ketlerov, V.; Aerts, G.; Kerveno, M.; Álvarez, H.; Koehler, P.; Álvarez-Velarde, F.; Andriamonje, S.; Andrzejewski, J.; Vlachoudis, V.; Vlastou, R.; Villamarin, D.; Vincente, M.C.; Käppeler, F.; Vaz, P.; Jericha, E.; Ventura, A.; Igashira, M.; Terlizzi, R.; Herrera-Martinez, A.; Vannini, G.; Voss, F.; Guerrero, C.; Tavora, L.; Gunsing, F.; Goverdovski, A.; Gramegna, F.; Heil, M.; Haas, B.; Haight, R.; Furman, W.; Gonzalez-Romero, E.; Goncalves, I.; Ferrant, L.; Ferrari, A.; Ferreira-Marques, R.; Fujiii, K.; Dridi, W.; Duran, I.; Eleftheriadis, C.; Embid-Segura, M.; Domingo-Pardo, C.; Dillmann, I.; David, S.; Cox, J.; Dahlfors, M.; Cortés Rossell, Guillem Pere; Couture, A.; Chiaveri, E.; Colonna, N.; Cennini, P.; Chepel, V.; Rubbia, C.; Rosetti, M.; Plukis, A.; Poch Parés, Agustí; Plag, R.; Plompen, A.; Rauscher, T.; Reifarth, R.; Pretel Sánchez, Carme; Quesada, J.; Pigni, M.T.; Perrot, L.; Pavlopoulos, P.; Papadopoulos, C.; Paradela, C.; Wisshak, K.; Patronis, N.; Pavlik, A.; O'Brien, S.; Pancin, J.; Papachristodoulou, C.; Mosconi, M.; Moreau, C.; Oberhummer, H.; Walter, S.; Neves, F.; Wiescher, M. (2009-10-08)
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      Accés restringit per política de l'editorial
      The 233U(n,f ) cross section has been measured at the white neutron source n TOF in a wide energy range with a dedicated fission ionization chamber. We report here the results from ∼30 meV to 1 MeV neutron energy. ...

    • High-accuracy determination of the 238U/ 235U fission cross section ratio up to ˜ 1 GeV at n_TOF at CERN 

      Paradela, C.; Calviani, Marco; Tarrío, D.; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Gómez Hornillos, María Belén; Pretel Sánchez, Carme; Riego Pérez, Albert (2015-02-09)
      Article
      Accés obert
      The U238 to U235 fission cross section ratio has been determined at n_TOF up to ˜1 GeV, with two different detection systems, in different geometrical configurations. A total of four datasets has been collected and compared. ...

    • High-accuracy determination of the neutron flux at n TOF 

      Barbagallo, M.; Guerrero, C.; Tsinganis, A.; Tarrío, D.; Altstadt, S.; Andriamonje, S.; Andrzejewski, J.; Audouin, L.; Bécares, V.; Becvar, F.; Belloni, Fabio; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Gómez Hornillos, María Belén; Hernández-Prieto, A.; Riego Pérez, Albert (2013-12-18)
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      Accés restringit per política de l'editorial
      The neutron flux of the n TOF facility at CERN was measured, after installation of the new spallation target, with four different systems based on three neutron-converting reactions, which represent accepted cross sections ...

    • High-accuracy determination of the neutron flux in the new experimental area n_TOF-EAR2 at CERN 

      Sabaté-Gilarte, M.; Barbagallo, Massimo; Colonna, Nicola; Calviño Tavares, Francisco; Casanovas Hoste, Adrià; Cortés Rossell, Guillem Pere; Tarifeño Saldivia, Ariel Esteban (2017-10-27)
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      Accés obert
      A new high flux experimental area has recently become operational at the n_TOF facility at CERN. This new measuring station, n_TOF-EAR2, is placed at the end of a vertical beam line at a distance of approximately 20m from ...

    • High-energy neutron-induced fission cross sections of natural lead and bismuth-209 

      Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (2011-08-12)
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      Accés restringit per política de l'editorial
      The CERN Neutron Time-Of-Flight (n TOF) facility is well suited to measure small neutron- induced ssion cross sections, as those of subactinides. The cross section ratios of natPb and 209Bi relative to 235U and 238U ...

    • High-precision measurement of the 238U(n,¿) cross section with the Total Absorption Calorimeter (TAC) at n TOF, CERN 

      Massimi, Cristian; Mingrone, Federica; Gunsing, Frank; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Riego Pérez, Albert (2014-05-01)
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      Accés restringit per política de l'editorial
      The neutron capture cross section of U-238 is fundamental to the design and operation of current reactors and future fast nuclear reactors, and thus must be measured to a high level of accuracy. An experiment has been ...

    • High-resolution cross section measurements for neutron interactions on 89 Y with incident neutron energies up to 95 keV 

      Tagliente, Giuseppe; Milazzo, Paolo Maria; Paradela, Carlos; Kopecky, S.; Vescovi, Diego; Alaerts, G.; Damone, Lucia Anna; Heyse, Jan; Krticka, Milan; Schillebeeckx, P.; Caballero Ontanaya, Luis; Calviño Tavares, Francisco; Casanovas Hoste, Adrià; Cortés Rossell, Guillem Pere; Tarifeño Saldivia, Ariel Esteban (Springer, 2024-01-31)
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      Accés restringit per política de l'editorial
      The cross section of the 89Y(n, ¿) reaction has important implications in nuclear astrophysics and for advanced nuclear technology. Given its neutron magic number N = 50 and a consequent small neutron capture cross section, ...

    • High-resolution study of 237 Np fission cross section from 5 eV to 1 MeV 

      Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (Robert C.Haight; Mark B. Chadwick; Toshihiko Kawano; Patrick Talou, 2004)
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      A series of measurements of 237Np fission cross section have been performed at the CERN spallation neutron facility n_TOF which covers a wide energy range from 1 eV up to 250 MeV. A fast ionization chamber (FIC) was used ...

    • Improved lead and bismuth (n,gamma) cross sections and their astrophysical impact 

      Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (EDP Sciences, 2007)
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      A series of (n,γ) neutron capture measurements on the lead isotopes and bismuth have been carried out at the CERN n TOF installation in the neutron energy range from 1 eV up to 1MeV. At n TOF, contaminations due to ...

    • Improved neutron capture cross section measurements with the n_TOF total absorption Cclorimeter 

      Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Gómez Hornillos, María Belén (2011-08-12)
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      Accés restringit per política de l'editorial
      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 ...

    • Integral measurement of the 12C(n, p)12B reaction up to 10 GeV 

      Žugec, Petar; Colonna, Nicola; Bosnar, Damir; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Gómez Hornillos, María Belén (2016-04-22)
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      Accés obert
      The integral measurement of the 12C(n, p)12B reaction was performed at the neutron time-offlight facility n TOF at CERN. The total number of 12B nuclei produced per neutron pulse of the n TOF beam was determined using ...

    • Investigation of neutron-induced reactions at n TOF: an overview of the 2009-2012 experimental program 

      Altstadt, Sebastian; Andrzejewski, Józef; Audouin, Ludmila; Barbagallo, Massimo; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Gómez Hornillos, María Belén; Riego Pérez, Albert (2014-05)
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      Accés restringit per política de l'editorial
      The neutron time-of-flight facility n TOF is operating at CERN (Switzerland) since 2001, having started in 2009 a new campaign with an upgraded spallation target. The ambitious program carried out includes a large number ...

    • Investigation of the 240Pu (n, f) reaction at the n_TOF/EAR2 facility in the 9 meV–6 MeV range 

      Stamatopoulos, A.; Tsinganis, Andrea; Colonna, Nicola; Vlastou, Roza; Diakaki, Maria; Žugec, Petar; Gunsing, Frank; Sabaté-Gilarte, Marta; Barbagallo, Massimo; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere (American Physical Society (APS), 2020-07-21)
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      Accés obert
      Background: Nuclear waste management is considered amongst the major challenges in the field of nuclear energy. A possible means of addressing this issue is waste transmutation in advanced nuclear systems, whose operation ...

    • Long-term evolution of the neutron rate at the Canfranc Underground Laboratory 

      Orrigo, S.; Taín Enríquez, José Luis; Mont i Geli, Nil; Tarifeño Saldivia, Ariel Esteban; Fraile, L. M.; Grieger, Marcel; Agramunt Ros, Jorge; Algora, A.; Bemmerer, D.; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; de Blas, Alfredo; Dillmann, Iris; Domínguez Bugarín, Araceli; Nacher González, Enrique; Tolosa Delgado, Alvaro (springer-Verlag, 2022-09-13)
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      Accés obert
      We report results on the long-term variation of the neutron counting rate at the Canfranc Underground Laboratory, of importance for several low-background experiments installed there, including rare-event searches. The ...

    • Measurement and analysis of 241Am(n,¿) cross sections with C6D6 detectors at the n TOF facility at CERN 

      Fraval, Kevin; Altstadt, Sebastian; Andrzejewski, Józef; Audouin, Ludmila; Barbagallo, Massimo; Bécares, Vicente; Becvar, F.; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Gómez Hornillos, María Belén; Riego Pérez, Albert (2014-05-01)
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      Accés restringit per política de l'editorial
      The 241Am(n,¿) cross sections have been measured at the n TOF facility at CERN using C6D6 liquid scintillators and time of flight spectrometry. The results in the resolved resonance range bring new constraints to evaluations ...

    • Measurement and analysis of the 241-Am neutron capture cross section at the n_TOF facility at CERN 

      Mendoza, E.; Cano-Ott, D; Altstadt, Sebastian; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Riego Pérez, Albert (AMER PHYSICAL SOC, 2018-05-24)
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      Accés obert
      The 241Am(n,¿ ) cross section has been measured at the n_TOF facility at CERN with the n_TOF BaF2 Total Absorption Calorimeter in the energy range between 0.2 eV and 10 keV. Our results are analyzed as resolved resonances ...

    • Measurement and analysis of the 243Am neutron capture cross section at the n_TOF facility at CERN 

      Mendoza, E.; Cano-Ott, D; Guerrero, C.; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Pretel Sánchez, Carme (2014-09-11)
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      Accés restringit per política de l'editorial
      Background: The design of new nuclear reactors and transmutation devices requires to reduce the present neutron cross section uncertainties of minor actinides. Purpose: Improvement of the 243Am(n,¿ ) cross section ...

    • Measurement and analysis of the Am 241 (n, gamma) cross section with liquid scintillator detectors using time-of-flight spectroscopy at the n-TOF facility at CERN 

      Fraval, Kevin; Gunsing, Frank; Altstadt, Sebastian; Andrzejewski, Józef; Audouin, Ludmila; Barbagallo, Massimo; Bécares, Vicente; Belloni, Fabio; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Gómez Hornillos, María Belén; Hernández Prieto, Álvaro; Riego Pérez, Albert (2014-04-23)
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      Accés restringit per política de l'editorial
      The Am241(n,¿) cross section has been measured at the n-TOF facility at CERN using deuterated benzene liquid scintillators, commonly known as C6D6 detectors, and time-of-flight spectrometry. The results in the resolved ...

    • Measurement and resonance analysis of the 33S (n, alpha) 30Si cross section at the CERN n_TOF facility in the energy region from 10 to 300 keV 

      Praena, J.; Sabaté-Gilarte, M.; Porras, I.; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Gómez Hornillos, María Belén (AMER PHYSICAL SOC, 2018-06-04)
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      Accés obert
      The 33S(n,a)30Si cross section has been measured at the neutron time-of-flight (n_TOF) facility at CERN in the neutron energy range from 10 to 300 keV relative to the 10B(n,a)7Li cross-section standard. Both reactions were ...