Ara es mostren els items 215-234 de 263

    • Radiative capture on 242Pu for MOX fuel reactors 

      Guerrero, Carlos; Balibrea-Correa, J.; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere (2013-09-25)
      Report de recerca
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      The use of MOX fuel (mixed-oxide fuel made of UO2 and PuO2) in nuclear reactors allows substituting a large fraction of the enriched Uranium by Plutonium reprocessed from spent fuel. Indeed around 66% of the plutonium from ...
    • Radiative neutron capture cross-section measurement of ge isotopes at n_TOF CERN facility and its importance for stellar nucleosynthesis 

      Gawlik Ramiega, Aleksandra; Lederer-Woods, C.; Andrzejewski, Józef; Battino, U.; Mingrone, Federica; Weiss, Christina; Aberle, O.; Audouin, Ludmila; Bacak, Michael; Balibrea-Correa, J.; Barbagallo, Massimo; Barros, S.; Bécares, Vicente; Becvar, F.; Calviño Tavares, Francisco; Casanovas Hoste, Adrià; Cortés Rossell, Guillem Pere (2021-04-01)
      Article
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      This manuscript summarizes the results of radiative neutron capture cross-section measurements on two stable germanium isotopes, 70Ge and 73Ge. Experiments were performed at the n_TOF facility at CERN via the time-of-flight ...
    • Radiative neutron capture on 242Pu in the resonance region at the CERN n_TOF-EAR1 facility 

      Lerendegui-Marco, J.; Guerrero, C.; Mendoza, E.; Casanovas Hoste, Adrià; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere (AMER PHYSICAL SOC, 2018-02-06)
      Article
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      The spent fuel of current nuclear reactors contains fissile plutonium isotopes that can be combined with uranium to make mixed oxide (MOX) fuel. In this way the Pu from spent fuel is used in a new reactor cycle, contributing ...
    • Recent results in nuclear astrophysics at the n_TOF facility at CERN 

      Aberle, O.; Andrzejewski, Józef; Audouin, Ludmila; Calviño Tavares, Francisco; Casanovas Hoste, Adrià; Cortés Rossell, Guillem Pere; Tarifeño Saldivia, Ariel Esteban (PoS - Proceedings of Science, 2016)
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      The neutron time of flight (n_TOF) facility at CERN is a spallation source characterized by a white neutron spectrum. The innovative features of the facility, in the two experimental areas, (20 m and 185 m), allow for an ...
    • Resonance capture cross section of Pb-207 

      Sarchiapone, L.; Savvidis, I.; Kerveno, M.; Stephan, C.; Tagliente, G.; Koehler, P.; Rubbia, C.; Ketlerov, V.; Rudolf, G.; Kossionides, E.; Rullhusen, P.; Goncalves, I.; Gallino, R.; Ferreira-Marques, R.; Fitzpatrick, L.; Frais-Koelbl, H.; Fujii, K.; Eleftheriadis, C.; Embid-Segura, M.; Ferrant, L.; Ferrari, A.; Poch Parés, Agustí; Duran, I.; Dridi, W.; Dolfini, R.; David, S.; Dillmann, I.; Cox, J.; Dahlfors, M.; Colonna, N.; Couture, A.; Chiaveri, E.; Perrot, L.; Cortés Rossell, Guillem Pere; Rosetti, M.; Reifarth, R.; Plompen, A.; Plag, R.; Quesada, J.; Rauscher, T.; Pretel Sánchez, Carme; Plukis, A.; Pavlopoulos, P.; Pavlik, A.; Patronis, N.; Mosconi, M.; Pancin, J.; Wisshak, K.; Papachristodoulou, C.; Wiescher, M.; Papadopoulos, C.; Paradela, C.; The nTOF Collaborat; Oberhummer, H.; Oshima, M.; O'Brien, S.; Wendler, H.; Moreau, C.; Milazzo, P.M.; Neves, F.; Voss, F.; Cennini, P.; Carrapico, C.; Mastinu, P.; Capote, R.; Mengoni, A.; Cano-Ott, D.; Marganiec, J.; Bisterzo, S.; Konovalov, V.; Marrone, S.; Calviño Tavares, Francisco; Lozano, M.; Berthoumieux, E.; Lukic, S.; Becvar, F.; Baumann, P.; Badurek, G.; Chepel, V.; Lopes, I.; Salgado, J.; Lindote, A.; Leeb, H.; Lamboudis, C.; Krticka, M.; Taín Enríquez, José Luis; Tassan-Got, L.; Audouin, L.; Isaev, S.; Domingo-Pardo, C.; Jericha, E.; Abbondanno, U.; Kadi, Y.; Aerts, G.; Kaeppeler, F.; Álvarez-Pol, H.; Karamanis, D.; Álvarez-Velarde, F.; Karadimos, D.; Andriamonje, S.; Andrzejewski, J.; Assimakopoulos, P.; Vlachoudis, V.; Vlastou, R.; Villamarin, D.; Vincente, M.C.; Igashira, M.; Vaz, P.; Herrera-Martinez, A.; Ventura, A.; Heil, M.; Terlizzi, R.; Haight, R.; Vannini, G.; Walter, S.; Gramegna, F.; Tavora, L.; Griesmayer, E.; Gonzalez-Romero, E.; Goverdovski, A.; Haas, B.; Guerrero, C.; Gunsing, F.; Furman, W. (2006-11)
      Article
      Accés restringit per política de l'editorial
      The radiative neutron capture cross section of 207Pb has been measured at the CERN neutron time of flight installation n TOF using the pulse height weighting technique in the resolved energy region. The measurement has ...
    • Resonance neutron-capture cross sections of stable magnesium isotopes and their astrophysical implications 

      Massimi, Cristian; Koehler, Paul E.; Colonna, Nicola; Gunsing, Frank; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (2012-04-20)
      Article
      Accés restringit per política de l'editorial
      We have measured the neutron capture cross sections of the stable magnesium isotopes 24,25,26Mg in the energy range of interest to the s process using the neutron time-of-flight facility n_TOF at CERN. Capture events ...
    • Searches for nonminimal Higgs bosons from a virtual Z decaying into a muon pair at the SLAC e+ e- storage ring PEP 

      Komamiya, S.; Fordham, C.; Abrams, Geoffrey; Calviño Tavares, Francisco (American Physical Society (APS), 1989-08-01)
      Article
      Accés restringit per política de l'editorial
      Nonminimal neutral Higgs bosons decaying into a muon pair were searched for using the Mark II detector at the SLAC e+e- collider PEP at SQRT(s) =29 GeV. A neutral scalar Higgs boson H0s can be produced accompanied by a ...
    • Simultaneous measurement of neutron-induced capture and fission reactions at CERN 

      Guerrero, C.; Berthoumieux, Eric; Cano-Ott, D; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Gómez Hornillos, María Belén (2012)
      Article
      Accés obert
      The measurement of the capture cross-section of fissile elements, of utmost importance for the design of innovative nuclear reactors and the management of nuclear waste, faces particular difficulties related to the -ray ...
    • Simultaneous measurement of the neutron capture and fission yields of 233-U 

      Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (EDP Sciences, 2007)
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      We have measured the neutron capture and fission cross section of 233U at the neutron time-of-flight facility n TOF at CERN in the energy range from 1 eV to 1 MeV with high accuracy by using a high performance 4π BaF2 ...
    • Spin Measurements of n+87Sr for Level Density Studies 

      Gunsing, Frank; Fraval, Kevin; Becvar, F.; Mitchell, G.E.; Andrzejewski, Józef; Altstadt, Sebastian; Audouin, Ludmila; Barbagallo, Massimo; Bécares, Vicente; Belloni, Fabio; Berthoumieux, Eric; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Riego Pérez, Albert (2014-05-01)
      Article
      Accés restringit per política de l'editorial
      We have used the 4p BaF2 gamma-ray detector array at the n TOF neutron time-of-flight facility at CERN for an experiment in order to determine the spins of resonances of n+87Sr by measuring the gamma-ray spectra and ...
    • Status and outlook of the neutron time-of-flight facility n_TOF at CERN 

      Gunsing, Frank; Abbondanno, U; Aerts, G; Alvarez, H; Alvarez Velarde, Francisco; Andriamonje, S; Assimakopoulos, P; Audouin, Ludmila; Badurek, G.; Dolfini, R.; Ferrant, L.; Domingo Pardo, César; Dridi, W.; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Duran, I.; Ferrari, A.; Ferreira-Marques, R.; Frais-Koelbl, H.; Furman, W.; Fujii, K; Jericha, E.; Goncalves, I.; Gonzalez Romero, E.; Goverdovski, A.; Karamanis, D.; Gramegna, F.; Griesmayer, E.; Haas, B.; Haight, R.; Kerveno, M.; Herrera Martinez, Aura; Igashira, M.; Isaev, S.; Kappeler, F; Kadi, Y; Karadimos, D.; Ketlerov, V.; Koehler, Paul E.; Konovalov, V.; Kossionides, E.; Krticka, M.; Mengoni, A; Lampoudis, C.; Leeb, H.; Lindote, A.; Neves, F.; Lopes, I.; Marrone, S.; Lukic, S.; Marganiec, J.; Marques, L.; Oberhummer, H.; Martínez, T.; Mastinu, P.; Massimi, Cristian; Milazzo, P.M.; Moreau, C; Mosconi, M.; O'Brien, S.; Oshima, M.; Pancin, J.; Papachristodoulou, C.; Papadopoulos, C.; Rauscher, Thomas; Paradela, C.; Patronis, N.; Pavlik, A.; Rudolf, G.; Pavlopoulos, P.; Perrot, L.; Pigni, M.T.; Plag, R.; Plompen, A.; Plukis, A.; Rullhusen, P.; Pretel Sánchez, Carme; Poch Parés, Agustí; Quesada, J.; Reifarth, R.; Rubbia, C.; Rosetti, M.; Sarchiapone, L.; Salgado, J.; Savvidis, I.; Stephan, C.; Tagliente, G.; Walter, S.; Tassan-Got, L.; Tavora, L.; Becvar, F.; Terlizzi, R.; Vannini, Gianni; Vaz, P.; Ventura, Alberto; Villamarin, D.; Vincente, M.C.; Berthoumieux, Eric; Vlastou, R.; Vlachoudis, V.; Voss, F.; Wendler, H.; Wiescher, M.; Wisshak, K.; Cano-Ott, D; Capote Noy, Roberto; Albornoz, A.C. de; Cennini, P.; Eleftheriadis, C.; Chepel, V.; Chiaveri, E.; Colonna, Nicola; Couture, A.; Cox, J.; Dahlfors, M.; David, S.; Dillmann, Iris; Lozano, Manuel; Guerrero, Carlos; Taín Enríquez, José Luis (2007-08)
      Article
      Accés restringit per política de l'editorial
      The neutron time-of-flight facility n_TOF at CERN, fully operational since 2002, combines a high instantaneous neutron flux with high energy resolution. The wide energy range and the high neutron flux per time-of-flight ...
    • Strong one-neutron emission from two-neutron unbound states in Beta decays of the r-process nuclei 86,87 Ga 

      Yokoyama, R.; Grzywacz, Robert; Rasco, B. Charles; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Tarifeño Saldivia, Ariel Esteban (American Physical Society (APS), 2019-09-19)
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      Accés obert
      Beta-delayed one-neutron and two-neutron branching ratios (P1n and P2n) have been measured in the decay of A = 84 to 87 Ga isotopes at the Radioactive-Isotope Beam Factory (RIBF) at the RIKEN Nishina Center using a ...
    • Study of 234U(n,f) resonances measured at the CERN n TOF facility 

      Tarrío, D.; Audouin, Ludmila; Tassan Got, Laurence; Abbondanno, U.; Andriamonje, S.; Andrzejewski, Józef; Badurek, G.; Becvar, Zdenek; Berthoumieux, Eric; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Pretel Sánchez, Carme (2014-05-01)
      Article
      Accés restringit per política de l'editorial
      We present the analysis of the resolved resonance region for the 234U(n,f) cross section data measured at the CERN n TOF facility. The resonance parameters in the energy range from 1 eV to 1500 eV have been obtained with ...
    • Study of decay properties for Ba to Nd nuclei relevant for the formation of the r-process rare-earth peak (A~160) 

      Pallàs i Solís, Max; Tarifeño Saldivia, Ariel; Kiss, Gábor Gyula; Taín Enríquez, José Luis; Tolosa Delgado, Alvaro; Vitéz Sveiczer, András; Calviño Tavares, Francisco; Agramunt Ros, Jorge; Aguilera, Patricio; Algora, Alejandro; Allmond, James Mitchell; Cortés Rossell, Guillem Pere; Mont i Geli, Nil (2023)
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      Accés obert
      At the RIKEN Nishina Center, exotic neutron-rich isotopes of Ba, La, Ce, Pr, and Nd were measured. This work reports their half-lives (T1/2) and ß-delayed neutron-emission probabilities (Pxn). The setup consisted of the ...
    • Study of decay properties of Ba to Nd nuclei (A~160) relevant to the formation of the r-process rare-earth peak 

      Pallàs i Solís, Max; Tarifeño Saldivia, Ariel; Kiss, Gábor Gyula; Taín Enríquez, José Luis; Tolosa Delgado, Alvaro; Vitéz Sveiczer, András; Calviño Tavares, Francisco; Agramunt Ros, Jorge; Aguilera, Patricio; Algora, Alejandro; Allmond, James Mitchell; Baba, H.; Mont i Geli, Nil (2023-05-26)
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      Accés obert
      Half-lifes (T1/2) of exotic neutron-rich isotopes of Ba, La, Ce, Pr, and Nd were measured at the RIKEN Nishina Center. The experimental setup consisted of the BigRIPS in-flight separator for ion selection identification, ...
    • Study of photon strength function of actinides: the case of 235-U, 238-Np and 241-Pu 

      Cano Ott, Daniel; Colonna, Nicola; Tagliente, G.; Belloni, Fabio; Abbondanno, U.; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (2011-08-12)
      Article
      Accés restringit per política de l'editorial
      The decay from excited levels in medium and heavy nuclei can be described in a statistical approach by means of Photon Strength Functions and Level Density distributions. The study of electromagnetic cascades following ...
    • Study of the 234U(n,f) fission fragment angular distribution at the CERN n_TOF facility 

      Leal-Cidoncha, E.; Duran, Ignacio; Paradela, C.; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere (2014)
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      The angular distribution of the f ssion fragments (FFAD) produced in neutron induced reactions of actinides have been measured with a fission detection setup based on parallel-plate avalanche counters (PPACs) at the Neutron ...
    • Study of the background in the measuring station at the n_TOF facility at CERN: sources and solutions 

      Abbondanno, U.; Aerts, G.; Andriamonje, S.; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (2001-12-10)
      Report de recerca
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      A background roughly two orders of magnitude higher than tolerable was found in the n_TOF facility at CERN during the first measurements. This note describes a series of additional measurements performed in the n_TOF ...
    • Study of the photon strength function of 152SM in resonance neutron capture at n-TOF 

      Marrone, S.; Colonna, Nicola; Krticka, M.; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Alvarez Pol, Héctor; Alvarez Velarde, Francisco; Andrzejewski, Józef; Audouin, Ludmila; Berthoumieux, Eric; Capdevila Paramio, Roser; Poch, Agustí; Pretel Sánchez, Carme (PoS - Proceedings of Science, 2018)
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      The Photon Strength Function of 152Sm has been investigated at nTOF by studying the ¿-ray spectra from resonance neutron capture of 151Sm. The experimental apparatus consisted of two C6D6 liquid scintillator detectors. The ...
    • The (n,alpha) reaction in the s-process branching point 59Ni 

      Weiß, C.; Griesmayer, E.; Andrzejewski, Józef; Badurek, G.; Dressler, Rugard; Koehler, Paul E.; Lederer, Claudia; Altstadt, Sebastian; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Gómez Hornillos, María Belén; Riego Pérez, Albert (2014-06-01)
      Article
      Accés restringit per política de l'editorial
      The (n,alpha) reaction in the radioactive 59Ni is of relevance in nuclear astrophysics as 59Ni can be considered as the first branching point in the astrophysical s-process. Its relevance in nuclear technology is especially ...