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Žugec, Petar ; Colonna, Nicola ; Bosnar, Damir ; Altstadt, Sebastian ; Andrzejewski, Józef ; Audouin, Laurent ; Barbagallo, Massimo ; Bécares, Vicente ; Bečvář, František ; Belloni, Fabio ; Berthoumieux, Eric ; Billowes, Jonathan ; Boccone, Vittorio ; Brugger, Markus ; Calviani, Marco ; Calviño Tavares, Francisco ; Cano-Ott, Daniel ; Carrapiço, Carlos ; Cerutti, Francesco ; Chiaveri, Enrico ; Chin, Michael ; Cortés Rossell, Guillem Pere ; Cortés-Giraldo, Miguel Antonio ; Diakaki, Maria ; Domingo-Pardo, César ; Dressler, Rugard ; Durán, Ignacio ; Dzysiuk, Nataliia ; Eleftheriadis, Christos ; Ferrari, Alfredo ; Fraval, Kevin ; Ganesan, Srinivasan ; García Ríos, Aczel Regino ; Giubrone, Giuseppe ; Gómez Hornillos, María Belén ; Gonçalves, Isabel Maria Ferro ; González Romero, Enrique Miguel ; Griesmayer, Erich ; Guerrero Sánchez, Carlos ; Gunsing, Frank ; Gurusamy, Perumal ; Heinitz, Stephan ; Jenkins, David ; Jericha, Erwin ; Kadi, Yacine ; Käppeler, Franz ; Karadimos, Dimitri ; Kivel, Nikolay ; Koehler, Paul ; Kokkoris, Michael ; Krtička, Milan ; Kroll, Jiří ; Langer, Christoph ; Lederer, Claudia ; Leeb, Helmut ; Leong, Lou Sai ; Lo Meo, Sergio ; Losito, Roberto ; Manousos, Athanasios ; Marganiec, Justyna ; Martínez, Trinitario ; Massimi, Cristian ; Mastinu, Pierfrancesco ; Mastromarco, Mario ; Meaze, AKM Moinul Haque ; Mendoza Cembranos, Emilio ; Mengoni, Alberto ; Milazzo, Paolo Maria ; Mingrone, Federica ; Mirea, Mihail ; Mondalaers, Willy ; Paradela Dobarro, Carlos ; Pavlik, Andreas ; Perkowski, Jarosław ; Plompen, Arjan J. M. ; Praena, Javier ; Quesada Molina, José Manuel ; Rauscher, Thomas ; Reifarth, René ; Riego Pérez, Albert ; Roman, Faustin Laurenţiu ; Rubbia, Carlo ; Sarmento, Raul ; Saxena, Alok ; Schillebeeckx, Peter ; Schmidt, Stefan ; Schumann, Dorothea ; Tagliente, Giuseppe ; Taı́n Enríquez, José Luis ; Tarrío Vilas, Diego ; Tassan-Got, Laurent ; Tsinganis, Andrea ; Valenta, Stanislav ; Vannini, Gianni ; Variale, Vincenzo ; Vaz, Pedro ; Ventura, Alberto ; Versaci, Roberto ; Vermeulen, Mark J. ; Vlachoudis, Vasilis ; Vlastou, Rosa ; Wallner, Anton ; Ware, Timothy ; Weigand, Mario ; Weiß, Christina ; Wright, Tobias
The neutron sensitivity of the C6D6 detector setup used at n_TOF facility for capture measurements has been studied by means of detailed GEANT4 simulations. A realistic software replica of the entire n_TOF experimental hall, including the neutron beam line, sample, detector supports and the walls of the experimental area has been implemented in the simulations. The simulations have been analyzed in the same manner as experimental data, in particular by applying the Pulse Height Weighting Technique. The simulations have been validated against a measurement of the neutron background performed with a natC sample, showing an excellent agreement above 1 keV. At lower energies, an additional component in the measured natC yield has been discovered, which prevents the use of natC data for neutron background estimates at neutron energies below a few hundred eV. The origin and time structure of the neutron background have been derived from the simulations. Examples of the neutron background for two different samples are demonstrating the important role of accurate simulations of the neutron background in capture cross-section measurements.
Žugec, Petar ; Barbagallo, Massimo ; Colonna, Nicola ; Bosnar, Damir ; Altstadt, Sebastian ; Andrzejewski, Józef ; Audouin, Laurent ; Bécares, Vicente ; Bečvář, František ; Belloni, Fabio ; Berthoumieux, Eric ; Billowes, Jonathan ; Boccone, Vittorio ; Brugger, Markus ; Calviani, Marco ; Calviño Tavares, Francisco ; Cano-Ott, Daniel ; Carrapiço, Carlos ; Cerutti, Francesco ; Chiaveri, Enrico ; Chin, Michael ; Cortés Rossell, Guillem Pere ; Cortés-Giraldo, Miguel Antonio ; Diakaki, Maria ; Domingo-Pardo, César ; Dressler, Rugard ; Durán, Ignacio ; Dzysiuk, Nataliia ; Eleftheriadis, Christos ; Ferrari, Alfredo ; Fraval, Kevin ; Ganesan, Srinivasan ; García Ríos, Aczel Regino ; Giubrone, Giuseppe ; Gómez Hornillos, María Belén ; Gonçalves, Isabel Maria Ferro ; González Romero, Enrique Miguel ; Griesmayer, Erich ; Guerrero Sánchez, Carlos ; Gunsing, Frank ; Gurusamy, Perumal ; Heinitz, Stephan ; Jenkins, David ; Jericha, Erwin ; Kadi, Yacine ; Käppeler, Franz ; Karadimos, Dimitri ; Kivel, Nikolay ; Koehler, Paul ; Kokkoris, Michael ; Krtička, Milan ; Kroll, Jiří ; Langer, Christoph ; Lederer, Claudia ; Leeb, Helmut ; Leong, Lou Sai ; Lo Meo, Sergio ; Losito, Roberto ; Manousos, Athanasios ; Marganiec, Justyna ; Martínez, Trinitario ; Massimi, Cristian ; Mastinu, Pierfrancesco ; Mastromarco, Mario ; Meaze, AKM Moinul Haque ; Mendoza Cembranos, Emilio ; Mengoni, Alberto ; Milazzo, Paolo Maria ; Mingrone, Federica ; Mirea, Mihail ; Mondalaers, Willy ; Paradela Dobarro, Carlos ; Pavlik, Andreas ; Perkowski, Jarosław ; Pignatari, Marco ; Plompen, Arjan J. M. ; Praena, Javier ; Quesada Molina, José Manuel ; Rauscher, Thomas ; Reifarth, René ; Riegov, A. ; Roman, Faustin Laurenţiu ; Rubbia, Carlo ; Sarmento, Raul ; Saxena, Alok ; Schillebeeckx, Peter ; Schmidt, Stefan ; Schumann, Dorothea ; Tagliente, Giuseppe ; Taı́n Enríquez, José Luis ; Tarrío Vilas, Diego ; Tassan-Got, Laurent ; Tsinganis, Andrea ; Valenta, Stanislav ; Vannini, Gianni ; Variale, Vincenzo ; Vaz, Pedro ; Ventura, Alberto ; Versaci, Roberto ; Vermeulen, Mark J. ; Vlachoudis, Vasilis ; Vlastou, Rosa ; Wallner, Anton ; Ware, Timothy ; Weigand, Mario ; Weiß, Christina ; Wright, Tobias
The neutron capture cross section of 58Ni was measured at the neutron time of flight facility n_TOF at CERN, from 27 meV to 400 keV neutron energy. Special care has been taken to identify all the possible sources of background, with the so-called neutron background obtained for the first time using high-precision GEANT4 simulations. The energy range up to 122 keV was treated as the resolved resonance region, where 51 resonances were identified and analyzed by a multilevel R-matrix code SAMMY. Above 122 keV the code SESH was used in analyzing the unresolved resonance region of the capture yield. Maxwellian averaged cross sections were calculated in the temperature range of kT = 5 – 100 keV, and their astrophysical implications were investigated.
Leal Cidoncha, Esther ; Durán, Ignacio ; Paradela Dobarro, Carlos ; Tassan-Got, Laurent ; Audouin, Laurent ; Leal, Luiz C. ; Le Naour, Claire ; Noguere, Gilles ; Tarrío Vilas, Diego ; Leong, Lou Sai ; Altstadt, Sebastian ; Andrzejewski, Józef ; Barbagallo, Massimo ; Bécares, Vicente ; Bečvář, František ; Belloni, Fabio ; Berthoumieux, Eric ; Billowes, Jonathan ; Boccone, Vittorio ; Bosnar, Damir ; Brugger, Markus ; Calviani, Marco ; Calviño Tavares, Francisco ; Cano-Ott, Daniel ; Carrapiço, Carlos ; Cerutti, Francesco ; Chiaveri, Enrico ; Chin, Michael ; Colonna, Nicola ; Cortés Rossell, Guillem Pere ; Cortés-Giraldo, Miguel Antonio ; Diakaki, Maria ; Domingo-Pardo, César ; Dressler, Rugard ; Eleftheriadis, Christos ; Ferrari, Alfredo ; Fraval, Kevin ; Ganesan, Srinivasan ; García Ríos, Aczel Regino ; Giubrone, Giuseppe ; Gómez Hornillos, María Belén ; Gonçalves, Isabel Maria Ferro ; González Romero, Enrique Miguel ; Griesmayer, Erich ; Guerrero Sánchez, Carlos ; Gunsing, Frank ; Gurusamy, Perumal ; Hernández Prieto, Álvaro ; Jenkins, David ; Jericha, Erwin ; Kadi, Yacine ; Käppeler, Franz ; Karadimos, Dimitri ; Kivel, Nikolay ; Kokkoris, Michael ; Krtička, Milan ; Kroll, Jiří ; Lampoudis, Christos ; Langer, Christoph ; Lederer, Claudia ; Leeb, Helmut ; Losito, Roberto ; Mallick, Amod Kishore ; Manousos, Athanasios ; Marganiec, Justyna ; Martı́nez, Trinitario ; Massimi, Cristian ; Mastinu, Pierfrancesco ; Mastromarco, Mario ; Meaze, AKM Moinul Haque ; Mendoza Cembranos, Emilio ; Mengoni, Alberto ; Milazzo, Paolo Maria ; Mingrone, Federica ; Mirea, Mihail ; Mondelaers, Willy ; Pavlik, Andreas ; Perkowski, Jarosław ; Plompen, Arjan J. M. ; Praena, Javier ; Quesada Molina, José Manuel ; Rauscher, Thomas ; Reifarth, René ; Riego Pérez, Albert ; Robles Manzano, Maria Soledad ; Roman, Faustin Laurenţiu ; Rubbia, Carlo ; Sabaté-Gilarte, Marta ; Sarmento, Raul ; Saxena, Alok ; Schillebeeckx, Peter ; Schmidt, Stefan ; Schumann, Dorothea ; Tagliente, Giuseppe ; Taı́n Enríquez, José Luis ; Tsinganis, Andrea ; Valenta, Stanislav ; Vannini, Gianni ; Variale, Vincenzo ; Vaz, Pedro ; Ventura, Alberto ; Versaci, Roberto ; Vermeulen, Mark J. ; Vlachoudis, Vasilis ; Vlastou, Rosa ; Wallner, Anton ; Ware, Timothy ; Weigand, Mario ; Weiß, Christina ; Wright, Tobias ; Žugec, Petar
New results are presented of the 234U neutron-induced fission cross section, obtained with high accuracy in the resonance region by means of two methods using the 235U(n,f) as reference. The recent evaluation of the 235U(n,f) obtained with SAMMY by L. C. Leal et al. (these Proceedings), based on previous n_TOF data [1], has been used to calculate the 234U(n,f) cross section through the 234U/235U ratio, being here compared with the results obtained by using the n_TOF neutron flux.
Barbagallo, Massimo ; Colonna, Nicola ; Altstadt, Sebastian ; Andrzejewski, Józef ; Audouin, Laurent ; Bécares, Vicente ; Bečvář, František ; Belloni, Fabio ; Berthoumieux, Eric ; Billowes, Jonathan ; Bosnar, Damir ; Brugger, Markus ; Calviani, Marco ; Calviño Tavares, Francisco ; Cano-Ott, Daniel ; Carrapiço, Carlos ; Cerutti, Francesco ; Chiaveri, Enrico ; Chin, Michael ; Cortés Rossell, Guillem Pere ; Cortés-Giraldo, Miguel Antonio ; Diakaki, Maria ; Domingo-Pardo, César ; Durán, Ignacio ; Dressler, Rugard ; Eleftheriadis, Christos ; Ferrari, Alfredo ; Fraval, Kevin ; Ganesan, Srinivasan ; García Ríos, Aczel Regino ; Giubrone, Giuseppe ; Gonçalves, Isabel Maria Ferro ; González Romero, Enrique Miguel ; Griesmayer, Erich ; Guerrero Sánchez, Carlos ; Gunsing, Frank ; Hernández Prieto, Álvaro ; Jenkins, David ; Jericha, Erwin ; Kadi, Yacine ; Käppeler, Franz ; Karadimos, Dimitri ; Kivel, Nikolay ; Koehler, Paul ; Krtička, Milan ; Kroll, Jiří ; Lampoudis, Christos ; Langer, Christoph ; Leal Cidoncha, Esther ; Lederer, Claudia ; Leeb, Helmut ; Leong, Lou Sai ; Losito, Roberto ; Manousos, Athanasios ; Marganiec, Justyna ; Martı́nez, Trinitario ; Massimi, Cristian ; Mastinu, Pierfrancesco ; Mastromarco, Mario ; Mendoza Cembranos, Emilio ; Mengoni, Alberto ; Milazzo, Paolo Maria ; Mingrone, Federica ; Mirea, Mihail ; Mondalaers, Willy ; Paradela Dobarro, Carlos ; Pavlik, Andreas ; Perkowski, Jarosław ; Plompen, Arjan J. M. ; Praena, Javier ; Quesada Molina, José Manuel ; Rauscher, Thomas ; Reifarth, René ; Riego Pérez, Albert ; Rubbia, Carlo ; Sabaté-Gilarte, Marta ; Sarmento, Raul ; Saxena, Alok ; Schillebeeckx, Peter ; Schmidt, Stefan ; Schumann, Dorothea ; Tagliente, Giuseppe ; Taı́n Enríquez, José Luis ; Tarrío Vilas, Diego ; Tassan-Got, Laurent ; Tsinganis, Andrea ; Valenta, Stanislav ; Vannini, Gianni ; Variale, Vincenzo ; Vaz, Pedro ; Ventura, Alberto ; Vermeulen, Mark J. ; Vlachoudis, Vasilis ; Vlastou, Rosa ; Wallner, Anton ; Ware, Timothy ; Weigand, Mario ; Weiß, Christina ; Wright, Tobias ; Žugec, Petar
The n_TOF facility operates at CERN with the aim of addressing the request of high accuracy nuclear data for advanced nuclear energy systems as well as for nuclear astrophysics. Thanks to the features of the neutron beam, important results have been obtained on neutron induced fission and capture cross sections of U, Pu and minor actinides. Recently the construction of another beam line has started; the new line will be complementary to the first one, allowing to further extend the experimental program foreseen for next measurement campaigns.
High precision measurement of the radiative capture cross section of 238U at the n_TOF CERN facility
(2017)
Mingrone, Federica ; Altstadt, Sebastian ; Andrzejewski, Józef ; Audouin, Laurent ; Bécares, Vicente ; Barbagallo, Massimo ; Bečvář, František ; Belloni, Fabio ; Berthoumieux, Eric ; Billowes, Jonathan ; Boccone, Vittorio ; Bosnar, Damir ; Brugger, Markus ; Calviño Tavares, Francisco ; Calviani, Marco ; Cano-Ott, Daniel ; Carrapiço, Carlos ; Cerutti, Francesco ; Chiaveri, Enrico ; Chin, Michael ; Colonna, Nicola ; Cortés Rossell, Guillem Pere ; Cortés-Giraldo, Miguel Antonio ; Diakaki, Maria ; Domingo-Pardo, César ; Dressler, Rugard ; Durán, Ignacio ; Eleftheriadis, Christos ; Ferrari, Alfredo ; Fraval, Kevin ; Furman, Valter ; Göbel, Kathrin ; Gómez Hornillos, María Belén ; Ganesan, Srinivasan ; García Ríos, Aczel Regino ; Giubrone, Giuseppe ; Gonçalves, Isabel Maria Ferro ; González Romero, Enrique Miguel ; Goverdovski, Andrey ; Griesmayer, Erich ; Guerrero Sánchez, Carlos ; Gunsing, Frank ; Heftrich, Tanja ; Hernández Prieto, Álvaro ; Heyse, Jan ; Jenkins, David ; Jericha, Erwin ; Käppeler, Franz ; Kadi, Yacine ; Karadimos, Dimitri ; Katabuchi, Tatsuya ; Ketlerov, Vladimir ; Khryachkov, Vitaly ; Kivel, Nikolay ; Koehler, Paul ; Kokkoris, Michael ; Kroll, Jiří ; Krtička, Milan ; Lampoudis, Christos ; Langer, Christoph ; Leal Cidoncha, Esther ; Lederer, Claudia ; Leeb, Helmut ; Leong, Lou Sai ; Lerendegui-Marco, Jorge ; Losito, Roberto ; Mallick, Amod Kishore ; Manousos, Athanasios ; Marganiec, Justyna ; Martı́nez, Trinitario ; Massimi, Cristian ; Mastinu, Pierfrancesco ; Mastromarco, Mario ; Mendoza Cembranos, Emilio ; Mengoni, Alberto ; Milazzo, Paolo Maria ; Mirea, Mihail ; Mondelaers, Willy ; Paradela Dobarro, Carlos ; Pavlik, Andreas ; Perkowski, Jarosław ; Plompen, Arjan J. M. ; Praena, Javier ; Quesada Molina, José Manuel ; Rauscher, Thomas ; Reifarth, René ; Riego Pérez, Albert ; Robles Manzano, Maria Soledad ; Rubbia, Carlo ; Ryan, James ; Sabaté-Gilarte, Marta ; Sarmento, Raul ; Saxena, Alok ; Schillebeeckx, Peter ; Schmidt, Stefan ; Schumann, Dorothea ; Sedyshev, Pavel V. ; Tagliente, Giuseppe ; Taı́n Enríquez, José Luis ; Tarifeño-Saldivia, Ariel ; Tarrío Vilas, Diego ; Tassan-Got, Laurent ; Tsinganis, Andrea ; Valenta, Stanislav ; Vannini, Gianni ; Variale, Vincenzo ; Vaz, Pedro ; Ventura, Alberto ; Vermeulen, Mark J. ; Vlachoudis, Vasilis ; Vlastou, Rosa ; Wallner, Anton ; Ware, Timothy ; Weigand, Mario ; Weiß, Christina ; Wright, Tobias ; Žugec, Petar
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 fast and thermal nuclear reactors. Within the 7th framework programme ANDES of the European Commission three different measurements have been carried out with the aim of providing the 238U(n,γ) cross-section with an accuracy which varies from 1 to 5%, depending on the energy range. Hereby the final results of the measurement performed at the n_TOF CERN facility in a wide energy range from 1 eV to 700 keV will be presented.
Leal Cidoncha, Esther ; Durán, Ignacio ; Paradela Dobarro, Carlos ; Tarrío Vilas, Diego ; Leong, Lou Sai ; Tassan-Got, Laurent ; Audouin, Laurent ; Altstadt, Sebastian ; Andrzejewski, Józef ; Barbagallo, Massimo ; Bécares, Vicente ; Bečvář, František ; Belloni, Fabio ; Berthoumieux, Eric ; Billowes, Jonathan ; Boccone, Vittorio ; Bosnar, Damir ; Brugger, Markus ; Calviani, Marco ; Calviño Tavares, Francisco ; Cano-Ott, Daniel ; Carrapiço, Carlos ; Cerutti, Francesco ; Chiaveri, Enrico ; Chin, Michael ; Colonna, Nicola ; Cortés Rossell, Guillem Pere ; Cortés-Giraldo, Miguel Antonio ; Diakaki, Maria ; Domingo-Pardo, César ; Dressler, Rugard ; Dzysiuk, Nataliia ; Eleftheriadis, Christos ; Ferrari, Alfredo ; Fraval, Kevin ; Ganesan, Srinivasan ; García Ríos, Aczel Regino ; Giubrone, Giuseppe ; Gómez Hornillos, María Belén ; Gonçalves, Isabel Maria Ferro ; González Romero, Enrique Miguel ; Griesmayer, Erich ; Guerrero Sánchez, Carlos ; Gunsing, Frank ; Gurusamy, Perumal ; Hernández Prieto, Álvaro ; Jenkins, David ; Jericha, Erwin ; Kadi, Yacine ; Käppeler, Franz ; Karadimos, Dimitri ; Kivel, Nikolay ; Koehler, Paul ; Kokkoris, Michael ; Krtička, Milan ; Kroll, Jiří ; Lampoudis, Christos ; Langer, Christoph ; Lederer, Claudia ; Leeb, Helmut ; Lo Meo, Sergio ; Losito, Roberto ; Mallick, Amod Kishore ; Manousos, Athanasios ; Marganiec, Justyna ; Martı́nez, Trinitario ; Massimi, Cristian ; Mastinu, Pierfrancesco ; Mastromarco, Mario ; Meaze, AKM Moinul Haque ; Mendoza Cembranos, Emilio ; Mengoni, Alberto ; Milazzo, Paolo Maria ; Mingrone, Federica ; Mirea, Mihail ; Mondelaers, Willy ; Pavlik, Andreas ; Perkowski, Jarosław ; Plompen, Arjan J. M. ; Praena, Javier ; Quesada Molina, José Manuel ; Rauscher, Thomas ; Reifarth, René ; Riego Pérez, Albert ; Robles Manzano, Maria Soledad ; Roman, Faustin Laurenţiu ; Rubbia, Carlo ; Sabaté-Gilarte, Marta ; Sarmento, Raul ; Saxena, Alok ; Schillebeeckx, Peter ; Schmidt, Stefan ; Schumann, Dorothea ; Tagliente, Giuseppe ; Taı́n Enríquez, José Luis ; Tsinganis, Andrea ; Valenta, Stanislav ; Vannini, Gianni ; Variale, Vincenzo ; Vaz, Pedro ; Ventura, Alberto ; Versaci, Roberto ; Vermeulen, Mark J. ; Vlachoudis, Vasilis ; Vlastou, Rosa ; Wallner, Anton ; Ware, Timothy ; Weigand, Mario ; Weiß, Christina ; Wright, Tobias ; Žugec, Petar
Neutron-induced fission cross sections of 238U and 235U are used as standards in the fast neutron region up to 200 MeV. A high accuracy of the standards is relevant to experimentally determine other neutron reaction cross sections. Therefore, the detection effciency should be corrected by using the angular distribution of the fission fragments (FFAD), which are barely known above 20 MeV. In addition, the angular distribution of the fragments produced in the fission of highly excited and deformed nuclei is an important observable to investigate the nuclear fission process.
In order to measure the FFAD of neutron-induced reactions, a fission detection setup based on parallel-plate avalanche counters (PPACs) has been developed and successfully used at the CERN-n_TOF facility. In this work, we present the preliminary results on the analysis of new 235U(n,f) and 238U(n,f) data in the extended energy range up to 200 MeV compared to the existing experimental data.