Now showing items 21-40 of 104

  • 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)
    Article
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    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 ...
  • Highly accurate measurements of the spontaneous fission half-life of 240,242Pu 

    Salvador Castiñeira, Paula Genoveva; Brys, Tomasz; Eykens, Roger; Hambsch, Franz Josef; Moens, André; Oberstedt, Stephan; Sibbens, Geodele; Vanleeuw, David; Vidali, Marzio; Pretel Sánchez, Carme (2013-12-18)
    Article
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    Fast spectrum neutron-induced fission cross-section data for transuranic isotopes are of special demand from the nuclear data community. In particular highly accurate data are needed for the new generation IV nuclear ...
  • 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)
    Conference report
    Open Access
    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)
    Conference report
    Open Access
    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 ...
  • 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)
    Article
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    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 at n_TOF of the 237 Np(n,gamma) and 240 Pu(n,gamma) Cross Sections for the Transmutation of Nuclear Waste 

    Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (2006)
    Conference report
    Open Access
    The final design, safety assessment and precise performance analysis of transmutation devices such as Accelerator Driven Systems (ADS) or Fast Critical Reactors, need accurate and reliable nuclear data. The cross sections ...
  • Measurement of 139-La(n,gamma) cross section 

    Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (American Institute of Physics (AIP), 2005)
    Conference report
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    We measured the neutron capture cross section of 139La relative to 197Au in the energy range of 0.6 eV to 9 keV at n_TOF, the neutron time-of-flight facility at CERN. After a description of the experimental apparatus, ...
  • Measurement of 139-La(n,gamma) Cross Section at n_TOF 

    Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (American Institute of Physics (AIP), 2005)
    Conference report
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    The capture cross section of the 139La has been measured relative to 197Au standard at n_TOF. We provide here a short description of the experimental apparatus and of the data analysis procedures. The extracted resonance ...
  • Measurement of capture cross sections of 90,91,92,94,96 Zr isotopes at n_TOF 

    Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (Robert C.Haight; Mark B. Chadwick; Toshihiko Kawano; Patrick Talou, 2004)
    Conference report
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    The neutron capture cross sections for Zr isotopes have important implications in nuclear technologies as well in the field of nuclear astrophysics. The innovative features of the n_TOF CERN facility allowed for an ...
  • Measurement of neutron induced fission of 235-U, 233-U and 245-Cm with the FIC detector at the CERN n TOF facility 

    Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (EDP Sciences, 2007)
    Conference report
    Open Access
    A series of measurements of neutron induced fission cross section of various TRU isotopes have been performed at the CERN n TOF spallation neutron facility, in the energy range from thermal to nearly 250 MeV. The ...
  • Measurement of the 151Sm(n,g)152Sm cross section at n_TOF 

    Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (2005-07)
    Article
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    The 151Sm(n,γ)152Sm cross section, which is important for the interpretation of the 151Sm branching as an s-process thermometer, was measured from 1 eV up to 1 MeV at the innovative n_TOF facility at CERN. Based on these ...
  • Measurement of the 197-Au(n,gamma ) cross section at n_TOF, - a step forward towards a new standard for capture cross section measurements 

    Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (2008)
    Conference report
    Open Access
    The accurate knowledge of the 197Au(n,g ) reaction cross section is of great importance, since this reaction if often used as a reference in capture cross section measurements relevant to Nuclear Astrophysics, as well ...
  • Measurement of the 197-Au(n,gamma) cross section at n TOF: towards a new standard 

    Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (EDP Sciences, 2007)
    Conference report
    Open Access
    Two different detectors and techniques are employed at n TOF facility, at CERN, to improve the accuracy of the neutron capture cross section of 197Au(n,γ): a total absorption calorimeter and a set of C6D6. The accurate knowledge ...
  • Measurement of the 236U(n, f ) cross section from 170 meV to 2 MeV at the CERN n TOF facility 

    Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (2011-10-31)
    Article
    Restricted access - publisher's policy
    The neutron-induced fission cross section of 236U was measured at the neutron Time-of-Flight (n TOF) facility at CERN relative to the standard 235U(n,f ) cross section for neutron energies ranging from above thermal ...
  • Measurement of the 90,91,92,93,94,96-Zr(n,gamma) and 139-La(n,gamma) cross sections at n TOF 

    Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (EDP Sciences, 2007)
    Conference report
    Open Access
    Neutron capture cross sections of Zr and La isotopes have important implications in the field of nuclear astrophysics as well as in the nuclear technology. In particular the Zr isotopes play a key role for the determination ...
  • 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 (2006)
    Conference report
    Open Access
    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 ...
  • Measurement of the neutron capture cross section of 236-U 

    Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (2006)
    Conference report
    Open Access
    In this paper we describe the 236U(n,γ) reaction cross section measurement at the GELINA white pulsed neutron source of the Institute for Reference Materials and Measurements (IRMM) in Geel. The sample was placed in the ...
  • Measurement of the neutron capture cross sections of 233U, 237Np, 240,242Pu, 241,243Am and 245Cm with a total absorption calorimeter at n_TOF 

    Abbondanno, U.; Aerts, G.; Álvarez, F.; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Pretel Sánchez, Carme (2003-10-10)
    External research report
    Open Access
    Accurate and reliable neutron capture cross section data for actinides are necessary for the proper design, safety regulation and precise performance assessment of transmutation devices such as Fast Critical Reactors or ...
  • Measurement of the neutron-induced fission cross-section of 243Am relative to 235U from 0.5 to 20 MeV 

    Belloni, F.; Calviani, M.; Colonna, N.; Mastinu, P.; Milazzo, P.M.; Abbondanno, U.; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (2011-12)
    Article
    Restricted access - publisher's policy
    The ratio of the neutron-induced fission cross-sections of 243Am and 235U was measured in the energy range from 0.5 to 20 MeV with uncertainties of ≈4%. The experiment was performed at the CERN n TOF facility using a ...
  • Measurement of the Pu-240,242 neutron-induced fission cross sections 

    Salvador-Castiñeria, P; Bevilacqua, R; Brys, T; Hambsch, FJ; Oberstedt, S; Pretel Sánchez, Carme; Vidali, M (2012)
    Conference lecture
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