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1. Measurement of the Ce 140 (n,y) cross section at n_TOF and its astrophysical implications for the chemical evolution of the universe

Author

Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Amaducci, Simone, Colonna, Nicola, Cosentino, Luigi, Cristallo, Sergio, Finocchiaro, Paolo, Krticka, Milan, Massimi, Cristian, Mastromarco, Mario, Mazzone, Annamaria, Maugeri, Emilio Andrea, Mengoni, Alberto, Roederer, Ian U., Straniero, Oscar, Calviño Tavares, Francisco, Casanovas Hoste, Adrià, Cortés Rossell, Guillem Pere, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Amaducci, Simone, Colonna, Nicola, Cosentino, Luigi, Cristallo, Sergio, Finocchiaro, Paolo, Krticka, Milan, Massimi, Cristian, Mastromarco, Mario, Mazzone, Annamaria, Maugeri, Emilio Andrea, Mengoni, Alberto, Roederer, Ian U., Straniero, Oscar, Calviño Tavares, Francisco, Casanovas Hoste, Adrià, and Cortés Rossell, Guillem Pere

Abstract

140 Ce (n, y) is a key reaction for slow neutron-capture (s-process) nucleosynthesis due to being a bottleneck in the reaction flow. For this reason, it was measured with high accuracy (uncertainty˜5%) at the n_TOF facility, with an unprecedented combination of a high purity sample and low neutron-sensitivity detectors. The measured Maxwellian averaged cross section is up to 40% higher than previously accepted values. Stellar model calculations indicate a reduction around 20% of the s-process contribution to the Galactic cerium abundance and smaller sizeable differences for most of the heavier elements. No variations are found in the nucleosynthesis from massive stars., I.U.R. acknowledges support from the U.S. National Science Foundation (Grants No. AST 1613536, No. AST 1815403/1815767, No. AST 2205847, and No. PHY1430152—Joint Institute for Nuclear Astrophysics—Chemical Evolution of the Elements). S.C. acknowledges funding by the European Union—NextGenerationEU RFFM4C2 1.1 PRIN 2022 project “2022RJLWHN URKA” and by INAF Theory Grant “Understanding R-process & Kilonovae Aspects (URKA).” The authors acknowledge support from the MSMT of the Czech Republic, the Charles University UNCE/SCI/013 project, and by the funding agencies of the participating institutes. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this Letter., Article signat per 141 autors/es: S. Amaducci, N. Colonna, L. Cosentino, S. Cristallo, P. Finocchiaro, M. Krtička, C. Massimi, M. Mastromarco, A. Mazzone, E. A. Maugeri, A. Mengoni, I. U. Roederer, O. Straniero, S. Valenta, D. Vescovi, O. Aberle, V. Alcayne, J. Andrzejewski, L. Audouin, V. Babiano-Suarez, M. Bacak, M. Barbagallo, S. Bennett, E. Berthoumieux, J. Billowes, D. Bosnar, A. Brown, M. Busso, M. Caamaño, L. Caballero-Ontanaya, F. Calviño, M. Calviani, D. Cano-Ott, A. Casanovas, F. Cerutti, E. Chiaveri, G. Cortés, M. A. Cortés-Giraldo, L. A. Damone, P. J. Davies, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, Q. Ducasse, E. Dupont, I. Durán, Z. Eleme, B. Fernández-Domínguez, A. Ferrari, V. Furman, K. Göbel, R. Garg, A. Gawlik-Ramięga, S. Gilardoni, I. F. Gonçalves, E. González-Romero, C. Guerrero, F. Gunsing, H. Harada, S. Heinitz, J. Heyse, D. G. Jenkins, A. Junghans, F. Käppeler, Y. Kadi, A. Kimura, I. Knapová, M. Kokkoris, Y. Kopatch, D. Kurtulgil, I. Ladarescu, C. Lederer-Woods, H. Leeb, J. Lerendegui-Marco, S. J. Lonsdale, D. Macina, A. Manna, T. Martínez, A. Masi, P. Mastinu, E. Mendoza, V. Michalopoulou, P. M. Milazzo, F. Mingrone, J. Moreno-Soto, A. Musumarra, A. Negret, R. Nolte, F. Ogállar, A. Oprea, N. Patronis, A. Pavlik, J. Perkowski, C. Petrone, L. Piersanti, E. Pirovano, I. Porras, J. Praena, J. M. Quesada, D. Ramos-Doval, T. Rauscher, R. Reifarth, D. Rochman, C. Rubbia, M. Sabat ́e-Gilarte, A. Saxena, P. Schillebeeckx, D. Schumann, A. Sekhar, A. G. Smith, N. V. Sosnin, P. Sprung, A. Stamatopoulos, G. Tagliente, J. L. Tain, A. Tarifeño-Saldivia, L. Tassan-Got, Th. Thomas, P. Torres-Sánchez, A. Tsinganis, J. Ulrich, S. Urlass, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, A. Wallner, P. J. Woods, T. Wright, P.Žugec, Postprint (published version)

Published
2024

2. Corrigendum to “The s-process in the Nd-Pm-Sm region: Neutron activation of 147Pm” [Phys. Lett. B 797C (2019) 134809]

Author

Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Guerrero Sánchez, Carlos, Tessler, Moshe, Paul, Michael C., Lerendegui Marco, Jorge, Heinitz, Stephan, Maugeri, Emilio Andrea, Quesada Molina, José Manuel, Weissman, Leonid, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Guerrero Sánchez, Carlos, Tessler, Moshe, Paul, Michael C., Lerendegui Marco, Jorge, Heinitz, Stephan, Maugeri, Emilio Andrea, Quesada Molina, José Manuel, and Weissman, Leonid

Abstract

The authors regret to inform that they have found a mistake in the error propagation in one of the calculations of this work. At the end of the left column in page 5, the uncertainty associated to 826 mb should be 57 mb, and not 107 mb. In the error propagation for the sum of the two partial MACS values, the formula for a product of two values was applied instead of that for the sum of two values. The total MACS value is hence 826(57) mb instead of 826(107) mb. The authors would like to apologise for any inconvenience caused.

Published
2020

3. Measurement of the energy-differential cross-section of the 12C(n,p)12B and 12C(n,d)11B reactions at the n_TOF facility at CERN

Author

International Conference on Nuclear Data for Science and Technology (2019 : Peking), Barbagallo, Massimo, Aberle, Oliver, Alcayne, Victor, Amaducci, Simone, Andrzejewski, Józef, Audouin, Laurent, Babiano Suarez, Victor, Bacak, Michael, Bennett, Samuel, Berthoumieux, Eric, Bosnar, Damir, Brown, Adam S., Busso, Maurizio, Caamaño, Manuel, Caballero Ontanaya, Luis, Calviani, Marco, Calviño Tavares, Francisco, Cano-Ott, Daniel, Casanovas Hoste, Adrià, Cerutti, Francesco, Chiaveri, Enrico, Colonna, Nicola, Cortés Rossell, Guillem Pere, Cortés-Giraldo, Miguel Antonio, Cosentino, Luigi, Cristallo, Sergio, Damone, Lucia Anna, Davies, Paul John, Diakaki, Maria, Dietz, Mirco, Domingo-Pardo, César, Dressler, Rugard, Ducasse, Quentin, Dupont, Emmeric, Durán, Ignacio, Eleme, Zinovia, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Gonçalves, Isabel Maria Ferro, Finocchiaro, Paolo, Furman, Valter, Garg, Ruchi, Gawlik, Aleksandra, Gilardoni, Simone, Göbel, Kathrin, González Romero, Enrique Miguel, Guerrero Sánchez, Carlos, Gunsing, Frank, Heinitz, Stephan, Heyse, Jan, Jenkins, David, Jericha, Erwin, Jiri, U., Junghans, Arnd Rudolf, Kadi, Yacine, Käppeler, Franz, Kimura, Atsushi, Knapová, Ingrid, Kokkoris, Michael, Kopatch, Yuri N., Krtička, Milan, Kurtulgil, Cem Deniz, Ladarescu, Ion, Lederer-Woods, Claudia, Lerendegui-Marco, Jorge, Lonsdale, Sarah-Jane, Macina, Daniela, Manna, Alice, Martı́nez, Trinitario, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mendoza Cembranos, Emilio, Mengoni, Alberto, Michalopoulou, Veatriki, Milazzo, Paolo Maria, Millán Callado, María de los Ángeles, Mingrone, Federica, Moreno-Soto, Javier, Musumarra, Agatino, Negret, Alexandru, Ogállar Ruiz, Francisco, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Petrone, Cristina, Piersanti, Luciano, Pirovano, Elisa, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Ramos Doval, Diego, Reifarth, René, Rochman, Dimitri, Rubbia, Carlo, Sabaté- Gilarte, M., Saxena, Alok, Schillebeeckx, Peter, Schumann, Dorothea, Sekhar, Adhitya, Smith, Alastair Gavin, Sosnin, Nikolay V., Sprung, Peter, Stamatopoulos, Athanasios, Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Tarifeño-Saldivia, Ariel, Tassan-Got, Laurent, Thomas, Benedikt, Torres-Sánchez, Pablo, Tsinganis, Andrea, Urlaß, Sebastian, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vescovi, Diego, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Woods, Philip John, Wright, Tobias J., Žugec, Petar, International Conference on Nuclear Data for Science and Technology (2019 : Peking), Barbagallo, Massimo, Aberle, Oliver, Alcayne, Victor, Amaducci, Simone, Andrzejewski, Józef, Audouin, Laurent, Babiano Suarez, Victor, Bacak, Michael, Bennett, Samuel, Berthoumieux, Eric, Bosnar, Damir, Brown, Adam S., Busso, Maurizio, Caamaño, Manuel, Caballero Ontanaya, Luis, Calviani, Marco, Calviño Tavares, Francisco, Cano-Ott, Daniel, Casanovas Hoste, Adrià, Cerutti, Francesco, Chiaveri, Enrico, Colonna, Nicola, Cortés Rossell, Guillem Pere, Cortés-Giraldo, Miguel Antonio, Cosentino, Luigi, Cristallo, Sergio, Damone, Lucia Anna, Davies, Paul John, Diakaki, Maria, Dietz, Mirco, Domingo-Pardo, César, Dressler, Rugard, Ducasse, Quentin, Dupont, Emmeric, Durán, Ignacio, Eleme, Zinovia, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Gonçalves, Isabel Maria Ferro, Finocchiaro, Paolo, Furman, Valter, Garg, Ruchi, Gawlik, Aleksandra, Gilardoni, Simone, Göbel, Kathrin, González Romero, Enrique Miguel, Guerrero Sánchez, Carlos, Gunsing, Frank, Heinitz, Stephan, Heyse, Jan, Jenkins, David, Jericha, Erwin, Jiri, U., Junghans, Arnd Rudolf, Kadi, Yacine, Käppeler, Franz, Kimura, Atsushi, Knapová, Ingrid, Kokkoris, Michael, Kopatch, Yuri N., Krtička, Milan, Kurtulgil, Cem Deniz, Ladarescu, Ion, Lederer-Woods, Claudia, Lerendegui-Marco, Jorge, Lonsdale, Sarah-Jane, Macina, Daniela, Manna, Alice, Martı́nez, Trinitario, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mendoza Cembranos, Emilio, Mengoni, Alberto, Michalopoulou, Veatriki, Milazzo, Paolo Maria, Millán Callado, María de los Ángeles, Mingrone, Federica, Moreno-Soto, Javier, Musumarra, Agatino, Negret, Alexandru, Ogállar Ruiz, Francisco, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Petrone, Cristina, Piersanti, Luciano, Pirovano, Elisa, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Ramos Doval, Diego, Reifarth, René, Rochman, Dimitri, Rubbia, Carlo, Sabaté- Gilarte, M., Saxena, Alok, Schillebeeckx, Peter, Schumann, Dorothea, Sekhar, Adhitya, Smith, Alastair Gavin, Sosnin, Nikolay V., Sprung, Peter, Stamatopoulos, Athanasios, Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Tarifeño-Saldivia, Ariel, Tassan-Got, Laurent, Thomas, Benedikt, Torres-Sánchez, Pablo, Tsinganis, Andrea, Urlaß, Sebastian, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vescovi, Diego, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Woods, Philip John, Wright, Tobias J., and Žugec, Petar

Abstract

Although the 12C(n,p)12B and 12C(n,d)11B reactions are of interest in several fields of basic and applied Nuclear Physics the present knowledge of these two cross-sections is far from being accurate and reliable, with both evaluations and data showing sizable discrepancies. As part of the challenging n_TOF program on (n,cp) nuclear reactions study, the energy differential cross-sections of the 12C(n,p)12B and 12C(n,d)11 B reactions have been measured at CERN from the reaction thresholds up to 30 MeV neutron energy. Both measurements have been recently performed at the long flight-path (185 m) experimental area of the n_TOF facility at CERN using a pure (99.95%) rigid graphite target and two silicon telescopes. In this paper an overview of the experiment is presented together with a few preliminary results.

Published
2020

4. Measurement of the 244Cm capture cross sections at both CERN n_TOF experimental areas

Author

International Conference on Nuclear Data for Science and Technology (2019 : Peking), Alcayne, Victor, Mendoza Cembranos, Emilio, Cano-Ott, Daniel, Kimura, Atsushi, Aberle, Oliver, Amaducci, Simone, Andrzejewski, Józef, Audouin, Laurent, Babiano Suarez, Victor, Bacak, Michael, Barbagallo, Massimo, Bécares, Vicente, Bečvář, František, Bellia, Giorgio, Berthoumieux, Eric, Billowes, Jonathan, Bosnar, Damir, Brown, Adam S., Busso, Maurizio, Caamaño, Manuel, Caballero Ontanaya, Luis, Calviani, Marco, Calviño Tavares, Francisco, Casanovas Hoste, Adrià, Cerutti, Francesco, Chen, Yonghao, Chiaveri, Enrico, Colonna, Nicola, Cortés Rossell, Guillem Pere, Cortés-Giraldo, Miguel Antonio, Cosentino, Luigi, Cristallo, Sergio, Damone, Lucia Anna, Diakaki, Maria, Dietz, Mirco, Domingo-Pardo, César, Dressler, Rugard, Dupont, Emmeric, Durán, Ignacio, Eleme, Zinovia, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Gonçalves, Isabel Maria Ferro, Finocchiaro, Paolo, Furman, Valter, Garg, Ruchi, Gawlik, Aleksandra, Gilardoni, Simone, Glodariu, Tudor, Göbel, Kathrin, González Romero, Enrique Miguel, Guerrero Sánchez, Carlos, Gunsing, Frank, Heinitz, Stephan, Heyse, Jan, Jenkins, David, Jericha, Erwin, Kadi, Yacine, Käppeler, Franz, Kivel, Nikolay, Kokkoris, Michael, Kopatch, Yuri N., Krtička, Milan, Kurtulgil, Cem Deniz, Ladarescu, Ion, Lederer-Woods, Claudia, Lerendegui-Marco, Jorge, Lo Meo, Sergio, Lonsdale, Sarah-Jane, Macina, Daniela, Manna, Alice, Martı́nez, Trinitario, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Matteucci, Francesca, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mengoni, Alberto, Michalopoulou, Veatriki, Milazzo, Paolo Maria, Mingrone, Federica, Musumarra, Agatino, Negret, Alexandru, Nolte, Ralf, Ogállar Ruiz, Francisco, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Piersanti, Luciano, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Radeck, Désirée, Ramos Doval, Diego, Reifarth, René, Rochman, Dimitri, Rubbia, Carlo, Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schumann, Dorothea, Smith, Alastair Gavin, Sosnin, Nikolay V., Stamatopoulos, Athanasios, Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Talip, Zeynep, Tarifeño-Saldivia, Ariel, Tassan-Got, Laurent, Torres-Sánchez, Pablo, Tsinganis, Andrea, Ulrich, Jiri, Urlaß, Sebastian, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Woods, Philip John, Wright, Tobias J., Žugec, Petar, International Conference on Nuclear Data for Science and Technology (2019 : Peking), Alcayne, Victor, Mendoza Cembranos, Emilio, Cano-Ott, Daniel, Kimura, Atsushi, Aberle, Oliver, Amaducci, Simone, Andrzejewski, Józef, Audouin, Laurent, Babiano Suarez, Victor, Bacak, Michael, Barbagallo, Massimo, Bécares, Vicente, Bečvář, František, Bellia, Giorgio, Berthoumieux, Eric, Billowes, Jonathan, Bosnar, Damir, Brown, Adam S., Busso, Maurizio, Caamaño, Manuel, Caballero Ontanaya, Luis, Calviani, Marco, Calviño Tavares, Francisco, Casanovas Hoste, Adrià, Cerutti, Francesco, Chen, Yonghao, Chiaveri, Enrico, Colonna, Nicola, Cortés Rossell, Guillem Pere, Cortés-Giraldo, Miguel Antonio, Cosentino, Luigi, Cristallo, Sergio, Damone, Lucia Anna, Diakaki, Maria, Dietz, Mirco, Domingo-Pardo, César, Dressler, Rugard, Dupont, Emmeric, Durán, Ignacio, Eleme, Zinovia, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Gonçalves, Isabel Maria Ferro, Finocchiaro, Paolo, Furman, Valter, Garg, Ruchi, Gawlik, Aleksandra, Gilardoni, Simone, Glodariu, Tudor, Göbel, Kathrin, González Romero, Enrique Miguel, Guerrero Sánchez, Carlos, Gunsing, Frank, Heinitz, Stephan, Heyse, Jan, Jenkins, David, Jericha, Erwin, Kadi, Yacine, Käppeler, Franz, Kivel, Nikolay, Kokkoris, Michael, Kopatch, Yuri N., Krtička, Milan, Kurtulgil, Cem Deniz, Ladarescu, Ion, Lederer-Woods, Claudia, Lerendegui-Marco, Jorge, Lo Meo, Sergio, Lonsdale, Sarah-Jane, Macina, Daniela, Manna, Alice, Martı́nez, Trinitario, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Matteucci, Francesca, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mengoni, Alberto, Michalopoulou, Veatriki, Milazzo, Paolo Maria, Mingrone, Federica, Musumarra, Agatino, Negret, Alexandru, Nolte, Ralf, Ogállar Ruiz, Francisco, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Piersanti, Luciano, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Radeck, Désirée, Ramos Doval, Diego, Reifarth, René, Rochman, Dimitri, Rubbia, Carlo, Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schumann, Dorothea, Smith, Alastair Gavin, Sosnin, Nikolay V., Stamatopoulos, Athanasios, Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Talip, Zeynep, Tarifeño-Saldivia, Ariel, Tassan-Got, Laurent, Torres-Sánchez, Pablo, Tsinganis, Andrea, Ulrich, Jiri, Urlaß, Sebastian, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Woods, Philip John, Wright, Tobias J., and Žugec, Petar

Abstract

Accurate neutron capture cross section data for minor actinides (MAs) are required to estimate the production and transmutation rates of MAs in light water reactors with a high burnup, critical fast reactors like Gen-IV systems and other innovative reactor systems such as accelerator driven systems (ADS). Capture reactions of 244Cm open the path for the formation of heavier Cm isotopes and of heavier elements such as Bk and Cf. In addition, 244Cm shares nearly 50% of the total actinide decay heat in irradiated reactor fuels with a high burnup, even after three years of cooling. Experimental data for this isotope are very scarce due to the difficulties of providing isotopically enriched samples and because the high intrinsic activity of the samples requires the use of neutron facilities with high instantaneous flux. The only two previous experimental data sets for this neutron capture cross section have been obtained in 1969 using a nuclear explosion and, more recently, at J-PARC in 2010. The neutron capture cross sections have been measured at n_TOF with the same samples that the previous experiments in J-PARC. The samples were measured at n_TOF Experimental Area 2 (EAR-2) with three C6D6 detectors and also in Experimental Area 1 (EAR-1) with the Total Absorption Calorimeter (TAC). Preliminary results assessing the quality and limitations of these new experimental datasets are presented for the experiments in both areas. Preliminary yields of both measurements will be compared with evaluated libraries for the first time.

Published
2020

5. Setup for the measurement of the 235U(n,f) cross section relative to n-p scattering up to 1 GeV

Author

International Conference on Nuclear Data for Science and Technology (2019 : Peking), Manna, Alice, Aberle, Oliver, Alcayne, Victor, Amaducci, Simone, Andrzejewski, Józef, Audouin, Laurent, Babiano Suarez, Victor, Bacak, Michael, Barbagallo, Massimo, Bennett, Samuel, Berthoumieux, Eric, Bosnar, Damir, Brown, Adam S., Busso, Maurizio, Caamaño, Manuel, Caballero Ontanaya, Luis, Calviani, Marco, Calviño Tavares, Francisco, Cano-Ott, Daniel, Casanovas Hoste, Adrià, Cerutti, Francesco, Chiaveri, Enrico, Colonna, Nicola, Cortés Rossell, Guillem Pere, Cortés-Giraldo, Miguel Antonio, Cosentino, Luigi, Cristallo, Sergio, Damone, Lucia Anna, Davies, Paul John, Diakaki, Maria, Dietz, Mirco, Domingo-Pardo, César, Dressler, Rugard, Ducasse, Quentin, Dupont, Emmeric, Durán, Ignacio, Eleme, Zinovia, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Gonçalves, Isabel Maria Ferro, Finocchiaro, Paolo, Furman, Valter, Garg, Ruchi, Gawlik, Aleksandra, Gilardoni, Simone, Göbel, Kathrin, González Romero, Enrique Miguel, Guerrero Sánchez, Carlos, Gunsing, Frank, Heinitz, Stephan, Heyse, Jan, Jenkins, David, Jericha, Erwin, Jiri, U., Junghans, Arnd Rudolf, Kadi, Yacine, Käppeler, Franz, Kimura, Atsushi, Knapová, Ingrid, Kokkoris, Michael, Kopatch, Yuri N., Krtička, Milan, Kurtulgil, Cem Deniz, Ladarescu, Ion, Lederer-Woods, Claudia, Lerendegui-Marco, Jorge, Lonsdale, Sarah-Jane, Macina, Daniela, Martı́nez, Trinitario, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mendoza Cembranos, Emilio, Mengoni, Alberto, Michalopoulou, Veatriki, Milazzo, Paolo Maria, Millán Callado, María de los Ángeles, Mingrone, Federica, Moreno-Soto, Javier, Musumarra, Agatino, Negret, Alexandru, Nolte, Ralf, Ogállar Ruiz, Francisco, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Petrone, Cristina, Piersanti, Luciano, Pirovano, Elisa, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Ramos Doval, Diego, Reifarth, René, Rochman, Dimitri, Rubbia, Carlo, Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schumann, Dorothea, Sekhar, Adhitya, Smith, Alastair Gavin, Sosnin, Nikolay V., Sprung, Peter, Stamatopoulos, Athanasios, Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Tarifeno-Saldivia, Ariel, Tassan-Got, Laurent, Thomas, Benedikt, Torres-Sánchez, Pablo, Tsinganis, Andrea, Urlaß, Sebastian, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vescovi, Diego, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Woods, Philip John, Wright, Tobias J., Žugec, Petar, International Conference on Nuclear Data for Science and Technology (2019 : Peking), Manna, Alice, Aberle, Oliver, Alcayne, Victor, Amaducci, Simone, Andrzejewski, Józef, Audouin, Laurent, Babiano Suarez, Victor, Bacak, Michael, Barbagallo, Massimo, Bennett, Samuel, Berthoumieux, Eric, Bosnar, Damir, Brown, Adam S., Busso, Maurizio, Caamaño, Manuel, Caballero Ontanaya, Luis, Calviani, Marco, Calviño Tavares, Francisco, Cano-Ott, Daniel, Casanovas Hoste, Adrià, Cerutti, Francesco, Chiaveri, Enrico, Colonna, Nicola, Cortés Rossell, Guillem Pere, Cortés-Giraldo, Miguel Antonio, Cosentino, Luigi, Cristallo, Sergio, Damone, Lucia Anna, Davies, Paul John, Diakaki, Maria, Dietz, Mirco, Domingo-Pardo, César, Dressler, Rugard, Ducasse, Quentin, Dupont, Emmeric, Durán, Ignacio, Eleme, Zinovia, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Gonçalves, Isabel Maria Ferro, Finocchiaro, Paolo, Furman, Valter, Garg, Ruchi, Gawlik, Aleksandra, Gilardoni, Simone, Göbel, Kathrin, González Romero, Enrique Miguel, Guerrero Sánchez, Carlos, Gunsing, Frank, Heinitz, Stephan, Heyse, Jan, Jenkins, David, Jericha, Erwin, Jiri, U., Junghans, Arnd Rudolf, Kadi, Yacine, Käppeler, Franz, Kimura, Atsushi, Knapová, Ingrid, Kokkoris, Michael, Kopatch, Yuri N., Krtička, Milan, Kurtulgil, Cem Deniz, Ladarescu, Ion, Lederer-Woods, Claudia, Lerendegui-Marco, Jorge, Lonsdale, Sarah-Jane, Macina, Daniela, Martı́nez, Trinitario, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mendoza Cembranos, Emilio, Mengoni, Alberto, Michalopoulou, Veatriki, Milazzo, Paolo Maria, Millán Callado, María de los Ángeles, Mingrone, Federica, Moreno-Soto, Javier, Musumarra, Agatino, Negret, Alexandru, Nolte, Ralf, Ogállar Ruiz, Francisco, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Petrone, Cristina, Piersanti, Luciano, Pirovano, Elisa, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Ramos Doval, Diego, Reifarth, René, Rochman, Dimitri, Rubbia, Carlo, Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schumann, Dorothea, Sekhar, Adhitya, Smith, Alastair Gavin, Sosnin, Nikolay V., Sprung, Peter, Stamatopoulos, Athanasios, Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Tarifeno-Saldivia, Ariel, Tassan-Got, Laurent, Thomas, Benedikt, Torres-Sánchez, Pablo, Tsinganis, Andrea, Urlaß, Sebastian, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vescovi, Diego, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Woods, Philip John, Wright, Tobias J., and Žugec, Petar

Abstract

The neutron induced fission of 235U is extensively used as a reference for neutron fluence measurements in various applications, ranging from the investigation of the biological effectiveness of high energy neutrons, to the measurement of high energy neutron cross sections of relevance for accelerator driven nuclear systems. Despite its widespread use, no data exist on neutron induced fission of 235U above 200 MeV. The neutron facility n_TOF offers the possibility to improve the situation. The measurement of 235U(n,f) relative to the differential n-p scattering cross-section, was carried out in September 2018 with the aim of providing accurate and precise cross section data in the energy range from 10 MeV up to 1 GeV. In such measurements, Recoil Proton Telescopes (RPTs) are used to measure the neutron flux while the fission events are detected and counted with dedicated detectors. In this paper the measurement campaign and the experimental set-up are illustrated.

Published
2020

6. Study of the neutron-induced fission cross section of 237Np at CERN’s n_TOF facility over a wide energy range

Author

International Conference on Nuclear Data for Science and Technology (2019 : Peking), Stamatopoulos, Athanasios, Tsinganis, Andrea, Diakaki, Maria, Colonna, Nicola, Kokkoris, Michael, Vlastou, Rosa, Kalamara, Antigoni, Schillebeeckx, Peter, Tassan-Got, Laurent, Žugec, Petar, Sabaté-Gilarte, Marta, Patronis, Nikolas, Eleme, Zinovia, Heyse, Jan, Aberle, Oliver, Andrzejewski, Józef, Audouin, Laurent, Bacak, Michael, Balibrea Correa, Javier, Barbagallo, Massimo, Bečvář, František, Berthoumieux, Eric, Billowes, Jonathan, Bosnar, Damir, Brown, Adam, Caamaño, Manuel, Calviño Tavares, Francisco, Calviani, Marco, Cano-Ott, Daniel, Cardella, Roberto, Casanovas Hoste, Adrià, Cerutti, Francesco, Chen, Yonghao, Chiaveri, Enrico, Cortés Rossell, Guillem Pere, Cortés-Giraldo, Miguel Antonio, Cosentino, Luigi, Damone, Lucia Anna, Domingo-Pardo, César, Dressler, Rugard, Dupont, Emmeric, Durán, Ignacio, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Ferreira, Pedro G., Finocchiaro, Paolo, Furman, Valter, Göbel, Kathrin, García Ríos, Aczel Regino, Gawlik, Aleksandra, Gilardoni, Simone, Glodariu, Tudor, Gonçalves, Isabel Maria Ferro, González Romero, Enrique Miguel, Griesmayer, Erich, Guerrero Sánchez, Carlos, Gunsing, Frank, Harada, Hideo, Heinitz, Stephan, Jenkins, David, Jericha, Erwin, Käppeler, Franz, Kadi, Yacine, Kavrigin, Pavel, Kimura, Atsushi, Kivel, Nikolay, Knapová, Ingrid, Krtička, Milan, Kurtulgil, Cem Deniz, Leal Cidoncha, Esther, Lederer, Claudia, Leeb, Helmut, Lerendegui-Marco, Jorge, Lo Meo, Sergio, Lonsdale, Sarah Jane, Macina, Daniela, Manna, Alice, Marganiec, Justyna, Martı́nez, Trinitario, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mendoza Cembranos, Emilio, Mengoni, Alberto, Milazzo, Paolo Maria, Mingrone, Federica, Musumarra, Agatino, Negret, Alexandru, Nolte, Ralf, Oprea, Andreea, Pavlik, Andreas, Perkowski, Jarosław, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Radeck, Désirée, Rauscher, Thomas, Reifarth, René, Rubbia, Carlo, Ryan, James A., Saxena, Alok, Schumann, Dorothea, Sedyshev, Pavel V., Smith, Alastair Gavin, Sosnin, Nikolay V., Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Tarifeño-Saldivia, Ariel, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vescovi, Diego, Vlachoudis, Vasilis, Wallner, Anton, Warren, Stephen J., Weiß, Christina, Woods, Philip John, Wright, Tobias, International Conference on Nuclear Data for Science and Technology (2019 : Peking), Stamatopoulos, Athanasios, Tsinganis, Andrea, Diakaki, Maria, Colonna, Nicola, Kokkoris, Michael, Vlastou, Rosa, Kalamara, Antigoni, Schillebeeckx, Peter, Tassan-Got, Laurent, Žugec, Petar, Sabaté-Gilarte, Marta, Patronis, Nikolas, Eleme, Zinovia, Heyse, Jan, Aberle, Oliver, Andrzejewski, Józef, Audouin, Laurent, Bacak, Michael, Balibrea Correa, Javier, Barbagallo, Massimo, Bečvář, František, Berthoumieux, Eric, Billowes, Jonathan, Bosnar, Damir, Brown, Adam, Caamaño, Manuel, Calviño Tavares, Francisco, Calviani, Marco, Cano-Ott, Daniel, Cardella, Roberto, Casanovas Hoste, Adrià, Cerutti, Francesco, Chen, Yonghao, Chiaveri, Enrico, Cortés Rossell, Guillem Pere, Cortés-Giraldo, Miguel Antonio, Cosentino, Luigi, Damone, Lucia Anna, Domingo-Pardo, César, Dressler, Rugard, Dupont, Emmeric, Durán, Ignacio, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Ferreira, Pedro G., Finocchiaro, Paolo, Furman, Valter, Göbel, Kathrin, García Ríos, Aczel Regino, Gawlik, Aleksandra, Gilardoni, Simone, Glodariu, Tudor, Gonçalves, Isabel Maria Ferro, González Romero, Enrique Miguel, Griesmayer, Erich, Guerrero Sánchez, Carlos, Gunsing, Frank, Harada, Hideo, Heinitz, Stephan, Jenkins, David, Jericha, Erwin, Käppeler, Franz, Kadi, Yacine, Kavrigin, Pavel, Kimura, Atsushi, Kivel, Nikolay, Knapová, Ingrid, Krtička, Milan, Kurtulgil, Cem Deniz, Leal Cidoncha, Esther, Lederer, Claudia, Leeb, Helmut, Lerendegui-Marco, Jorge, Lo Meo, Sergio, Lonsdale, Sarah Jane, Macina, Daniela, Manna, Alice, Marganiec, Justyna, Martı́nez, Trinitario, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mendoza Cembranos, Emilio, Mengoni, Alberto, Milazzo, Paolo Maria, Mingrone, Federica, Musumarra, Agatino, Negret, Alexandru, Nolte, Ralf, Oprea, Andreea, Pavlik, Andreas, Perkowski, Jarosław, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Radeck, Désirée, Rauscher, Thomas, Reifarth, René, Rubbia, Carlo, Ryan, James A., Saxena, Alok, Schumann, Dorothea, Sedyshev, Pavel V., Smith, Alastair Gavin, Sosnin, Nikolay V., Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Tarifeño-Saldivia, Ariel, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vescovi, Diego, Vlachoudis, Vasilis, Wallner, Anton, Warren, Stephen J., Weiß, Christina, Woods, Philip John, and Wright, Tobias

Abstract

Neutron-induced fission cross sections of isotopes involved in the nuclear fuel cycle are vital for the design and safe operation of advanced nuclear systems. Such experimental data can also provide additional constraints for the adjustment of nuclear model parameters used in the evaluation process, resulting in the further development of fission models. In the present work, the 237Np(n,f) cross section was studied at the EAR2 vertical beam-line at CERN's n_TOF facility, over a wide range of neutron energies, from meV to MeV, using the time-of-flight technique and a set-up based on Micromegas detectors, in an attempt to provide accurate experimental data. Preliminary results in the 200 keV – 14 MeV neutron energy range as well as the experimental procedure, including a description of the facility and the data handling and analysis, will be presented.

Published
2020

7. Status and perspectives of the neutron time-of-flight facility n_TOF at CERN

Author

International Conference on Nuclear Data for Science and Technology (2019 : Peking), Chiaveri, Enrico, Aberle, Oliver, Alcayne, Victor, Amaducci, Simone, Andrzejewski, Józef, Audouin, Laurent, Babiano Suarez, Victor, Bacak, Michael, Barbagallo, Massimo, Bennett, Samuel, Berthoumieux, Eric, Bosnar, Damir, Brown, Adam S., Busso, Maurizio, Caamaño, Manuel, Caballero Ontanaya, Luis, Calviani, Marco, Calviño Tavares, Francisco, Cano-Ott, Daniel, Casanovas Hoste, Adrià, Cerutti, Francesco, Colonna, Nicola, Cortés Rossell, Guillem Pere, Cortés-Giraldo, Miguel Antonio, Cosentino, Luigi, Cristallo, Sergio, Damone, Lucia Anna, Davies, Paul John, Diakaki, Maria, Dietz, Mirco, Domingo-Pardo, César, Dressler, Rugard, Ducasse, Quentin, Dupont, Emmeric, Durán, Ignacio, Eleme, Zinovia, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Gonçalves, Isabel Maria Ferro, Finocchiaro, Paolo, Furman, Valter, Garg, Ruchi, Gawlik, Aleksandra, Gilardoni, Simone, Göbel, Kathrin, González Romero, Enrique Miguel, Guerrero Sánchez, Carlos, Gunsing, Frank, Heinitz, Stephan, Heyse, Jan, Jenkins, David, Jericha, Erwin, Jiri, U., Junghans, Arnd Rudolf, Kadi, Yacine, Käppeler, Franz, Kimura, Atsushi, Knapová, Ingrid, Kokkoris, Michael, Kopatch, Yuri N., Krtička, Milan, Kurtulgil, Cem Deniz, Ladarescu, Ion, Lederer-Woods, Claudia, Lerendegui-Marco, Jorge, Lonsdale, Sarah-Jane, Macina, Daniela, Manna, Alice, Martı́nez, Trinitario, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mendoza Cembranos, Emilio, Mengoni, Alberto, Michalopoulou, Veatriki, Milazzo, Paolo Maria, Millán Callado, María de los Ángeles, Mingrone, Federica, Moreno-Soto, Javier, Musumarra, Agatino, Negret, Alexandru, Ogállar Ruiz, Francisco, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Petrone, Cristina, Piersanti, Luciano, Pirovano, Elisa, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Ramos Doval, Diego, Reifarth, René, Rochman, Dimitri, Rubbia, Carlo, Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schumann, Dorothea, Sekhar, Adhitya, Smith, Alastair Gavin, Sosnin, Nikolay V., Sprung, Peter, Stamatopoulos, Athanasios, Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Tarifeño-Saldivia, Ariel, Tassan-Got, Laurent, Thomas, Benedikt, Torres-Sánchez, Pablo, Tsinganis, Andrea, Urlaß, Sebastian, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vescovi, Diego, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Woods, Philip John, Wright, Tobias J., Žugec, Petar, International Conference on Nuclear Data for Science and Technology (2019 : Peking), Chiaveri, Enrico, Aberle, Oliver, Alcayne, Victor, Amaducci, Simone, Andrzejewski, Józef, Audouin, Laurent, Babiano Suarez, Victor, Bacak, Michael, Barbagallo, Massimo, Bennett, Samuel, Berthoumieux, Eric, Bosnar, Damir, Brown, Adam S., Busso, Maurizio, Caamaño, Manuel, Caballero Ontanaya, Luis, Calviani, Marco, Calviño Tavares, Francisco, Cano-Ott, Daniel, Casanovas Hoste, Adrià, Cerutti, Francesco, Colonna, Nicola, Cortés Rossell, Guillem Pere, Cortés-Giraldo, Miguel Antonio, Cosentino, Luigi, Cristallo, Sergio, Damone, Lucia Anna, Davies, Paul John, Diakaki, Maria, Dietz, Mirco, Domingo-Pardo, César, Dressler, Rugard, Ducasse, Quentin, Dupont, Emmeric, Durán, Ignacio, Eleme, Zinovia, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Gonçalves, Isabel Maria Ferro, Finocchiaro, Paolo, Furman, Valter, Garg, Ruchi, Gawlik, Aleksandra, Gilardoni, Simone, Göbel, Kathrin, González Romero, Enrique Miguel, Guerrero Sánchez, Carlos, Gunsing, Frank, Heinitz, Stephan, Heyse, Jan, Jenkins, David, Jericha, Erwin, Jiri, U., Junghans, Arnd Rudolf, Kadi, Yacine, Käppeler, Franz, Kimura, Atsushi, Knapová, Ingrid, Kokkoris, Michael, Kopatch, Yuri N., Krtička, Milan, Kurtulgil, Cem Deniz, Ladarescu, Ion, Lederer-Woods, Claudia, Lerendegui-Marco, Jorge, Lonsdale, Sarah-Jane, Macina, Daniela, Manna, Alice, Martı́nez, Trinitario, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mendoza Cembranos, Emilio, Mengoni, Alberto, Michalopoulou, Veatriki, Milazzo, Paolo Maria, Millán Callado, María de los Ángeles, Mingrone, Federica, Moreno-Soto, Javier, Musumarra, Agatino, Negret, Alexandru, Ogállar Ruiz, Francisco, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Petrone, Cristina, Piersanti, Luciano, Pirovano, Elisa, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Ramos Doval, Diego, Reifarth, René, Rochman, Dimitri, Rubbia, Carlo, Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schumann, Dorothea, Sekhar, Adhitya, Smith, Alastair Gavin, Sosnin, Nikolay V., Sprung, Peter, Stamatopoulos, Athanasios, Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Tarifeño-Saldivia, Ariel, Tassan-Got, Laurent, Thomas, Benedikt, Torres-Sánchez, Pablo, Tsinganis, Andrea, Urlaß, Sebastian, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vescovi, Diego, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Woods, Philip John, Wright, Tobias J., and Žugec, Petar

Abstract

Since the start of its operation in 2001, based on an idea of Prof. Carlo Rubbia [1], the neutron time of-flight facility of CERN, n_TOF, has become one of the most forefront neutron facilities in the world for wide-energy spectrum neutron cross section measurements. Thanks to the combination of excellent neutron energy resolution and high instantaneous neutron flux available in the two experimental areas, the second of which has been constructed in 2014, n_TOF is providing a wealth of new data on neutron-induced reactions of interest for nuclear astrophysics, advanced nuclear technologies and medical applications. The unique features of the facility will continue to be exploited in the future, to perform challenging new measurements addressing the still open issues and long-standing quests in the field of neutron physics. In this document the main characteristics of the n_TOF facility and their relevance for neutron studies in the different areas of research will be outlined, addressing the possible future contribution of n_TOF in the fields of nuclear astrophysics, nuclear technologies and medical applications. In addition, the future perspectives of the facility will be described including the upgrade of the spallation target, the setup of an imaging installation and the construction of a new irradiation area.

Published
2020

8. Fission program at n_TOF

Author

International Workshop on Nuclear Data Evaluation for Reactor Applications (5. : 2018 : Aix-en-Provence), Tassan-Got, Laurent, Colonna, Nicola, Diakaki, Maria, Eleme, Zinovia, Manna, Alice, Sekhar, Adhitya, Stamatopoulos, Athanasios, Aberle, Oliver, Alcayne, Victor, Amaducci, Simone, Andrzejewski, Józef, Audouin, Laurent, Babiano Suarez, Victor, Bacak, Michael, Barbagallo, Massimo, Bennett, Samuel, Berthoumieux, Eric, Bosnar, Damir, Brown, Adam S., Busso, Maurizio, Caamaño, Manuel, Caballero Ontanaya, Luis, Calviani, Marco, Calviño Tavares, Francisco, Cano-Ott, Daniel, Casanovas Hoste, Adrià, Cerutti, Francesco, Chiaveri, Enrico, Cortés Rossell, Guillem Pere, Cortés-Giraldo, Miguel Antonio, Cosentino, Luigi, Cristallo, Sergio, Damone, Lucia Anna, Davies, Paul John, Dietz, Mirco, Domingo-Pardo, César, Dressler, Rugard, Ducasse, Quentin, Dupont, Emmeric, Durán, Ignacio, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Gonçalves, Isabel Maria Ferro, Finocchiaro, Paolo, Furman, Valter, Garg, Ruchi, Gawlik, Aleksandra, Gilardoni, Simone, Göbel, Kathrin, González Romero, Enrique Miguel, Guerrero Sánchez, Carlos, Gunsing, Frank, Heinitz, Stephan, Heyse, Jan, Jenkins, David, Jiri, U., Junghans, Arnd Rudolf, Kadi, Yacine, Käppeler, Franz, Kimura, Atsushi, Knapová, Ingrid, Kokkoris, Michael, Kopatch, Yuri N., Krtička, Milan, Kurtulgil, Cem Deniz, Ladarescu, Ion, Lederer-Woods, Claudia, Lerendegui-Marco, Jorge, Lonsdale, Sarah-Jane, Macina, Daniela, Martinez, Trinitario, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mendoza Cembranos, Emilio, Mengoni, Alberto, Michalopoulou, Veatriki, Milazzo, Paolo Maria, Millán Callado, María de los Ángeles, Mingrone, Federica, Moreno-Soto, Javier, Musumarra, Agatino, Negret, Alexandru, Ogállar Ruiz, Francisco, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Petrone, Cristina, Piersanti, Luciano, Pirovano, Elisa, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Ramos Doval, Diego, Reifarth, René, Rochman, Dimitri, Rubbia, Carlo, Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schumann, Dorothea, Smith, Alastair Gavin, Sosnin, Nikolay V., Sprung, Peter, Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Tarifeño-Saldivia, Ariel, Thomas, Benedikt, Torres-Sánchez, Pablo, Tsinganis, Andrea, Urlaß, Sebastian, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vescovi, Diego, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Woods, Philip John, Wright, Tobias J., Žugec, Petar, International Workshop on Nuclear Data Evaluation for Reactor Applications (5. : 2018 : Aix-en-Provence), Tassan-Got, Laurent, Colonna, Nicola, Diakaki, Maria, Eleme, Zinovia, Manna, Alice, Sekhar, Adhitya, Stamatopoulos, Athanasios, Aberle, Oliver, Alcayne, Victor, Amaducci, Simone, Andrzejewski, Józef, Audouin, Laurent, Babiano Suarez, Victor, Bacak, Michael, Barbagallo, Massimo, Bennett, Samuel, Berthoumieux, Eric, Bosnar, Damir, Brown, Adam S., Busso, Maurizio, Caamaño, Manuel, Caballero Ontanaya, Luis, Calviani, Marco, Calviño Tavares, Francisco, Cano-Ott, Daniel, Casanovas Hoste, Adrià, Cerutti, Francesco, Chiaveri, Enrico, Cortés Rossell, Guillem Pere, Cortés-Giraldo, Miguel Antonio, Cosentino, Luigi, Cristallo, Sergio, Damone, Lucia Anna, Davies, Paul John, Dietz, Mirco, Domingo-Pardo, César, Dressler, Rugard, Ducasse, Quentin, Dupont, Emmeric, Durán, Ignacio, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Gonçalves, Isabel Maria Ferro, Finocchiaro, Paolo, Furman, Valter, Garg, Ruchi, Gawlik, Aleksandra, Gilardoni, Simone, Göbel, Kathrin, González Romero, Enrique Miguel, Guerrero Sánchez, Carlos, Gunsing, Frank, Heinitz, Stephan, Heyse, Jan, Jenkins, David, Jiri, U., Junghans, Arnd Rudolf, Kadi, Yacine, Käppeler, Franz, Kimura, Atsushi, Knapová, Ingrid, Kokkoris, Michael, Kopatch, Yuri N., Krtička, Milan, Kurtulgil, Cem Deniz, Ladarescu, Ion, Lederer-Woods, Claudia, Lerendegui-Marco, Jorge, Lonsdale, Sarah-Jane, Macina, Daniela, Martinez, Trinitario, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mendoza Cembranos, Emilio, Mengoni, Alberto, Michalopoulou, Veatriki, Milazzo, Paolo Maria, Millán Callado, María de los Ángeles, Mingrone, Federica, Moreno-Soto, Javier, Musumarra, Agatino, Negret, Alexandru, Ogállar Ruiz, Francisco, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Petrone, Cristina, Piersanti, Luciano, Pirovano, Elisa, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Ramos Doval, Diego, Reifarth, René, Rochman, Dimitri, Rubbia, Carlo, Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schumann, Dorothea, Smith, Alastair Gavin, Sosnin, Nikolay V., Sprung, Peter, Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Tarifeño-Saldivia, Ariel, Thomas, Benedikt, Torres-Sánchez, Pablo, Tsinganis, Andrea, Urlaß, Sebastian, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vescovi, Diego, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Woods, Philip John, Wright, Tobias J., and Žugec, Petar

Abstract

Since its start in 2001 the n_TOF collaboration developed a measurement program on fission, in view of advanced fuels in new generation reactors. A special effort was made on measurement of cross sections of actinides, exploiting the peculiarity of the n_TOF neutron beam which spans a huge energy domain, from the thermal region up to GeV. Moreover fission fragment angular distributions have also been measured. An overview of the cross section results achieved with different detectors is presented, including a discussion of the 237Np case where discrepancies showed up between different detector systems. The results on the anisotropy of the fission fragments and its implication on the mechanism of neutron absorption, and in applications, are also shown.

Published
2019

9. Measurement of the 244Cm and 246Cm neutron-induced capture cross sections at the n_TOF facility

Author

International Workshop on Nuclear Data Evaluation for Reactor Applications (5. : 2018 : Aix-en-Provence), Alcayne, Victor, Kimura, Atsushi, Mendoza Cembranos, Emilio, Cano-Ott, Daniel, Martı́nez, Trinitario, Aberle, Oliver, Andrzejewski, Józef, Audouin, Laurent, Bécares, Vicente, Bacak, Michael, Barbagallo, Massimo, Bečvář, František, Bellia, Giorgio, Berthoumieux, Eric, Billowes, Jonathan, Bosnar, Damir, Brown, Adam, Busso, Maurizio, Caamaño, Manuel, Caballero Ontanaya, Luis, Calviño Tavares, Francisco, Calviani, Marco, Casanovas Hoste, Adrià, Cerutti, Francesco, Chen, Yonghao, Chiaveri, Enrico, Colonna, Nicola, Cortés Rossell, Guillem Pere, Cortés-Giraldo, Miguel Antonio, Cosentino, Luigi, Cristallo, Sergio, Damone, Lucia Anna, Diakaki, Maria, Dietz, Mirco, Domingo-Pardo, César, Dressler, Rugard, Dupont, Emmeric, Durán, Ignacio, Eleme, Zinovia, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Finocchiaro, Paolo, Furman, Valter, Göbel, Kathrin, Gawlik, Aleksandra, Gilardoni, Simone, Glodariu, Tudor, Gonçalves, Isabel Maria Ferro, González Romero, Enrique Miguel, Guerrero Sánchez, Carlos, Gunsing, Frank, Harada, Hideo, Heinitz, Stephan, Heyse, Jan, Jenkins, David, Käppeler, Franz, Kadi, Yacine, Katabuchi, Tatsuya, Kivel, Nikolay, Knapová, Ingrid, Kokkoris, Michael, Kopatch, Yuri N., Krtička, Milan, Kurtulgil, Cem Deniz, Ladarescu, Ion, Lederer-Woods, Claudia, Lerendegui-Marco, Jorge, Lo Meo, Sergio, Lonsdale, Sarah Jane, Macina, Daniela, Manna, Alice, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Matteucci, Francesca, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mengoni, Alberto, Michalopoulou, Veatriki, Milazzo, Paolo Maria, Mingrone, Federica, Musumarra, Agatino, Negret, Alexandru, Nolte, Ralf, Ogállar Ruiz, Francisco, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Piersanti, Luciano, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Radeck, Désirée, Ramos Doval, Diego, Rauscher, Thomas, Reifarth, René, Rochman, Dimitri, Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schumann, Dorothea, Simone, S., Smith, Alastair Gavin, Sosnin, Nikolay V., Stamatopoulos, Athanasios, Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Talip, T., Tarifeño-Saldivia, Ariel, Tassan-Got, Laurent, Tsinganis, Andrea, Ulrich, Jiri, Urlaß, Sebastian, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vescovi, Diego, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Woods, Philip John, Wright, Tobias, Žugec, Petar, International Workshop on Nuclear Data Evaluation for Reactor Applications (5. : 2018 : Aix-en-Provence), Alcayne, Victor, Kimura, Atsushi, Mendoza Cembranos, Emilio, Cano-Ott, Daniel, Martı́nez, Trinitario, Aberle, Oliver, Andrzejewski, Józef, Audouin, Laurent, Bécares, Vicente, Bacak, Michael, Barbagallo, Massimo, Bečvář, František, Bellia, Giorgio, Berthoumieux, Eric, Billowes, Jonathan, Bosnar, Damir, Brown, Adam, Busso, Maurizio, Caamaño, Manuel, Caballero Ontanaya, Luis, Calviño Tavares, Francisco, Calviani, Marco, Casanovas Hoste, Adrià, Cerutti, Francesco, Chen, Yonghao, Chiaveri, Enrico, Colonna, Nicola, Cortés Rossell, Guillem Pere, Cortés-Giraldo, Miguel Antonio, Cosentino, Luigi, Cristallo, Sergio, Damone, Lucia Anna, Diakaki, Maria, Dietz, Mirco, Domingo-Pardo, César, Dressler, Rugard, Dupont, Emmeric, Durán, Ignacio, Eleme, Zinovia, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Finocchiaro, Paolo, Furman, Valter, Göbel, Kathrin, Gawlik, Aleksandra, Gilardoni, Simone, Glodariu, Tudor, Gonçalves, Isabel Maria Ferro, González Romero, Enrique Miguel, Guerrero Sánchez, Carlos, Gunsing, Frank, Harada, Hideo, Heinitz, Stephan, Heyse, Jan, Jenkins, David, Käppeler, Franz, Kadi, Yacine, Katabuchi, Tatsuya, Kivel, Nikolay, Knapová, Ingrid, Kokkoris, Michael, Kopatch, Yuri N., Krtička, Milan, Kurtulgil, Cem Deniz, Ladarescu, Ion, Lederer-Woods, Claudia, Lerendegui-Marco, Jorge, Lo Meo, Sergio, Lonsdale, Sarah Jane, Macina, Daniela, Manna, Alice, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Matteucci, Francesca, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mengoni, Alberto, Michalopoulou, Veatriki, Milazzo, Paolo Maria, Mingrone, Federica, Musumarra, Agatino, Negret, Alexandru, Nolte, Ralf, Ogállar Ruiz, Francisco, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Piersanti, Luciano, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Radeck, Désirée, Ramos Doval, Diego, Rauscher, Thomas, Reifarth, René, Rochman, Dimitri, Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schumann, Dorothea, Simone, S., Smith, Alastair Gavin, Sosnin, Nikolay V., Stamatopoulos, Athanasios, Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Talip, T., Tarifeño-Saldivia, Ariel, Tassan-Got, Laurent, Tsinganis, Andrea, Ulrich, Jiri, Urlaß, Sebastian, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vescovi, Diego, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Woods, Philip John, Wright, Tobias, and Žugec, Petar

Abstract

The neutron capture reactions of the 244Cm and 246Cm isotopes open the path for the formation of heavier Cm isotopes and heavier elements such as Bk and Cf in a nuclear reactor. In addition, both isotopes belong to the minor actinides with a large contribution to the decay heat and to the neutron emission in irradiated fuels. There are only two previous 244Cm and 246Cm capture cross section measurements: one in 1969 using a nuclear explosion [1] and the most recent data measured at J-PARC in 2010 [2]. The data for both isotopes are very scarce due to the difficulties in performing the measurements: high intrinsic activity of the samples and limited facilities capable of providing isotopically enriched samples. We have measured both neutron capture cross sections at the n_TOF Experimental Area 2 (EAR-2) with three C6 D6 detectors and also at Area 1 (EAR-1) with the TAC. Preliminary results assessing the quality and limitations (back-ground subtraction, measurement technique and counting statistics) of this new experimental datasets are presented and discussed.

Published
2019

10. Adsorption of volatile polonium and bismuth species on metals in various gas atmospheres: Part I - Adsorption of volatile polonium and bismuth on gold

Author

Maugeri, Emilio Andrea, Neuhausen, Jörg, Eichler, Robert, Dressler, Rugard, Rijpstra, Kim, Cottenier, Stefaan, Piguet, David, Vögele, Alexander, Schumann, Dorothea, Maugeri, Emilio Andrea, Neuhausen, Jörg, Eichler, Robert, Dressler, Rugard, Rijpstra, Kim, Cottenier, Stefaan, Piguet, David, Vögele, Alexander, and Schumann, Dorothea

Abstract

Polonium isotopes are considered the most hazardous radionuclides produced during the operation of accelerator driven systems (ADS) when lead-bismuth eutectic (LBE) is used as the reactor coolant and as the spallation target material. In this work the use of gold surfaces for capturing polonium from the cover gas of the ADS reactor was studied by thermochromatography. The results show that gaseous monoatomic polonium, formed in dry hydrogen, is adsorbed on gold at 1058 K. Its adsorption enthalpy was calculated as -250±7 kJ mol−1, using a Monte Carlo simulation code. Highly volatile polonium species that were observed in similar experiments in fused silica columns in the presence of moisture in both inert and reducing gas were not detected in the experiments studying adsorption on gold surfaces. PoO2 is formed in both dry and moist oxygen, and its interaction with gold is characterized by transport reactions. The interaction of bismuth, present in large amounts in the atmosphere of the ADS, with gold was also evaluated. It was found that bismuth has a higher affinity for gold, compared to polonium, in an inert, reducing, and oxidizing atmosphere. This fact must be considered when using gold as a material for filtering polonium in the cover gas of ADS.

Published
2019

11. Adsorption of volatile polonium species on metals in various gas atmospheres: Part II - Adsorption of volatile polonium on platinum, silver and palladium

Author

Maugeri, Emilio Andrea, Neuhausen, Jörg, Misiak, Ryszard, Eichler, Robert, Dressler, Rugard, Piguet, David, Vögele, Alexander, Schumann, Dorothea, Maugeri, Emilio Andrea, Neuhausen, Jörg, Misiak, Ryszard, Eichler, Robert, Dressler, Rugard, Piguet, David, Vögele, Alexander, and Schumann, Dorothea

Abstract

This work presents the results obtained from studying the interaction between polonium compounds formed in different atmospheres and platinum, palladium and silver surfaces obtained by thermochromatography. These results are of crucial importance for the design of cover gas filter systems for lead-bismuth eutectic (LBE)-based nuclear facilities such as accelerator driven systems (ADS). The results obtained from studying the interaction of polonium and platinum under inert atmosphere and reducing atmospheres with and without addition of moisture show that polonium is deposited at temperatures between 993 and 1221 K, with adsorption enthalpies ranging from -235 to -291 kJ mol−1, indicating a very strong adsorption of the polonium species present on platinum surfaces. The interaction between polonium and silver was investigated using purified inert, reducing and oxidizing carrier gases. Results show a deposition temperature between 867 and 990 K, with adsorption enthalpies ranging from -205 to -234 kJ mol−1. The interaction of polonium and palladium was studied in purified helium and purified hydrogen. For both conditions a deposition temperature of 1221 K was observed corresponding to an adsorption enthalpy of -340 kJ mol−1. No highly volatile polonium species was formed at any of the applied experimental conditions.

Published
2019

12. The measurement programme at the neutron time-of-flight facility n_TOF at CERN

Author

International Conference on Nuclear Data for Science and Technology (2016 : Bruges), Gunsing, Frank, Aberle, Oliver, Andrzejewski, Józef, Audouin, Laurent, Bécares, Vicente, Bacak, Michael, Balibrea Correa, Javier, Barbagallo, Massimo, Barros, Susana C.C., Bečvář, František, Beinrucker, Clemens, Belloni, Fabio, Berthoumieux, Eric, Billowes, Jonathan, Bosnar, Damir, Brown, Adam, Brugger, Markus, Caamaño, Manuel, Calviño Tavares, Francisco, Calviani, Marco, Cano-Ott, Daniel, Cardella, Roberto, Casanovas Hoste, Adrià, Castelluccio, Donato Maurizio, Cerutti, Francesco, Chen, Yonghao, Chiaveri, Enrico, Colonna, Nicola, Cortés-Giraldo, Miguel Antonio, Cortés Rossell, Guillem Pere, Cosentino, Luigi, Damone, Lucia Anna, Deo, Kapil, Diakaki, Maria, Domingo-Pardo, César, Dressler, Rugard, Dupont, Emmeric, Durán, Ignacio, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Ferreira, Pedro G., Finocchiaro, Paolo, Frost, Robert J. W., Furman, Valter, Ganesan, Srinivasan, García Ríos, Aczel Regino, Gawlik, Aleksandra, Gheorghe, Ioana, Gilardoni, Simone, Glodariu, Tudor, Gonçalves, Isabel Maria Ferro, González Romero, Enrique Miguel, Goverdovski, Andrey, Griesmayer, Erich, Guerrero Sánchez, Carlos, Göbel, Kathrin, Harada, Hideo, Heftrich, Tanja, Heinitz, Stephan, Hernández Prieto, Álvaro, Heyse, Jan, Jenkins, David, Jericha, Erwin, Käppeler, Franz, Kadi, Yacine, Kalamara, Antigoni, Katabuchi, Tatsuya, Kavrigin, Pavel, Ketlerov, Vladimir, Khryachkov, Vitaly, Kimura, Atsushi, Kivel, Nikolay, Kokkoris, Michael, Krtička, Milan, Kurtulgil, Cem Deniz, Leal Cidoncha, Esther, Lederer, Claudia, Leeb, Helmut, Lerendegui, Jorge, Licata, Mauro, Lo Meo, Sergio, Lonsdale, Sarah Jane, Losito, Roberto, Macina, Daniela, Marganiec, Justyna, Martı́nez, Trinitario, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Matteucci, Francesca, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mendoza Cembranos, Emilio, Mengoni, Alberto, Milazzo, Paolo Maria, Mingrone, Federica, Mirea, Mihail, Montesano, Simone, Musumarra, Agatino, Nolte, Ralf, Negret, Alexandru, Oprea, Andreea, Palomo Pinto, Francisco Rogelio, Paradela Dobarro, Carlos, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Radeck, Désirée, Rajeev, K., Rauscher, Thomas, Reifarth, René, Riego Pérez, Albert, Robles Manzano, Maria Soledad, Rout, Prakash Chandra, Rubbia, Carlo, Ryan, James, Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schmidt, Stefan, Schumann, Dorothea, Sedyshev, Pavel V., Smith, Alastair Gavin, Sosnin, Nikolay V., Stamatopoulos, Athanasios, Suryanarayana, Saraswatula Venkata, 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, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Warren, Stephen J., Weigand, Mario, Weiß, Christina, Wolf, Clemens, Woods, Philip John, Wright, Tobias, Žugec, Petar, International Conference on Nuclear Data for Science and Technology (2016 : Bruges), Gunsing, Frank, Aberle, Oliver, Andrzejewski, Józef, Audouin, Laurent, Bécares, Vicente, Bacak, Michael, Balibrea Correa, Javier, Barbagallo, Massimo, Barros, Susana C.C., Bečvář, František, Beinrucker, Clemens, Belloni, Fabio, Berthoumieux, Eric, Billowes, Jonathan, Bosnar, Damir, Brown, Adam, Brugger, Markus, Caamaño, Manuel, Calviño Tavares, Francisco, Calviani, Marco, Cano-Ott, Daniel, Cardella, Roberto, Casanovas Hoste, Adrià, Castelluccio, Donato Maurizio, Cerutti, Francesco, Chen, Yonghao, Chiaveri, Enrico, Colonna, Nicola, Cortés-Giraldo, Miguel Antonio, Cortés Rossell, Guillem Pere, Cosentino, Luigi, Damone, Lucia Anna, Deo, Kapil, Diakaki, Maria, Domingo-Pardo, César, Dressler, Rugard, Dupont, Emmeric, Durán, Ignacio, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Ferreira, Pedro G., Finocchiaro, Paolo, Frost, Robert J. W., Furman, Valter, Ganesan, Srinivasan, García Ríos, Aczel Regino, Gawlik, Aleksandra, Gheorghe, Ioana, Gilardoni, Simone, Glodariu, Tudor, Gonçalves, Isabel Maria Ferro, González Romero, Enrique Miguel, Goverdovski, Andrey, Griesmayer, Erich, Guerrero Sánchez, Carlos, Göbel, Kathrin, Harada, Hideo, Heftrich, Tanja, Heinitz, Stephan, Hernández Prieto, Álvaro, Heyse, Jan, Jenkins, David, Jericha, Erwin, Käppeler, Franz, Kadi, Yacine, Kalamara, Antigoni, Katabuchi, Tatsuya, Kavrigin, Pavel, Ketlerov, Vladimir, Khryachkov, Vitaly, Kimura, Atsushi, Kivel, Nikolay, Kokkoris, Michael, Krtička, Milan, Kurtulgil, Cem Deniz, Leal Cidoncha, Esther, Lederer, Claudia, Leeb, Helmut, Lerendegui, Jorge, Licata, Mauro, Lo Meo, Sergio, Lonsdale, Sarah Jane, Losito, Roberto, Macina, Daniela, Marganiec, Justyna, Martı́nez, Trinitario, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Matteucci, Francesca, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mendoza Cembranos, Emilio, Mengoni, Alberto, Milazzo, Paolo Maria, Mingrone, Federica, Mirea, Mihail, Montesano, Simone, Musumarra, Agatino, Nolte, Ralf, Negret, Alexandru, Oprea, Andreea, Palomo Pinto, Francisco Rogelio, Paradela Dobarro, Carlos, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Radeck, Désirée, Rajeev, K., Rauscher, Thomas, Reifarth, René, Riego Pérez, Albert, Robles Manzano, Maria Soledad, Rout, Prakash Chandra, Rubbia, Carlo, Ryan, James, Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schmidt, Stefan, Schumann, Dorothea, Sedyshev, Pavel V., Smith, Alastair Gavin, Sosnin, Nikolay V., Stamatopoulos, Athanasios, Suryanarayana, Saraswatula Venkata, 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, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Warren, Stephen J., Weigand, Mario, Weiß, Christina, Wolf, Clemens, Woods, Philip John, Wright, Tobias, and Žugec, Petar

Abstract

Neutron-induced reaction cross sections are important for a wide variety of research fields ranging from the study of nuclear level densities, nucleosynthesis to applications of nuclear technology like design, and criticality and safety assessment of existing and future nuclear reactors, radiation dosimetry, medical applications, nuclear waste transmutation, accelerator-driven systems and fuel cycle investigations. Simulations and calculations of nuclear technology applications largely rely on evaluated nuclear data libraries. The evaluations in these libraries are based both on experimental data and theoretical models. CERN’s neutron time-of-flight facility n_TOF has produced a considerable amount of experimental data since it has become fully operational with the start of its scientific measurement programme in 2001. While for a long period a single measurement station (EAR1) located at 185 m from the neutron production target was available, the construction of a second beam line at 20 m (EAR2) in 2014 has substantially increased the measurement capabilities of the facility. An outline of the experimental nuclear data activities at n_TOF will be presented.

Published
2017

13. The Nuclear Astrophysics program at n_TOF (CERN)

Author

Nuclear Physics in Astrophysics (Veranstaltung (8. : 2017 : Catania), Colonna, Nicola, Aberle, Oliver, Andrzejewski, Józef, Audouin, Laurent, Bacak, Michael, Balibrea Correa, Javier, Barbagallo, Massimo, Bečvář, František, Berthoumieux, Eric, Billowes, Jonathan, Bosnar, Damir, Brown, Adam, Caamaño, Manuel, Calviño Tavares, Francisco, Calviani, Marco, Cano-Ott, Daniel, Cardella, Roberto, Casanovas Hoste, Adrià, Cerutti, Francesco, Chen, Yonghao, Chiaveri, Enrico, Clai, Giulia, Cortés Rossell, Guillem Pere, Cortés-Giraldo, Miguel Antonio, Cosentino, Cristallo, Sergio, Damone, Lucia Anna, Diakaki, Maria, Domingo-Pardo, César, Dressler, Rugard, Dupont, Emmeric, Durán, Ignacio, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Ferreira, Pedro G., Finocchiaro, Paolo, Furman, Valter, Göbel, Kathrin, García Ríos, Aczel Regino, Gawlik, Aleksandra, Gilardoni, Simone, Glodariu, Tudor, Gonçalves, Isabel Maria Ferro, González Romero, Enrique Miguel, Griesmayer, Erich, Guerrero Sánchez, Carlos, Gunsing, Frank, Harada, Hideo, Heinitz, Stephan, Hernández Prieto, Álvaro, Heyse, Jan, Jenkins, David, Jericha, Erwin, Käppeler, Franz, Kadi, Yacine, Kalamara, Antigoni, Kavrigin, Pavel, Kimura, Atsushi, Kivel, Nikolay, Kokkoris, Michael, Kroll, Jiří, Krtička, Milan, Kurtulgil, Cem Deniz, Langer, Christoph, Leal Cidoncha, Esther, Lederer, Claudia, Lerendegui-Marco, Jorge, Leeb, Helmut, Lo Meo, Sergio, Lonsdale, Sarah Jane, Losito, Roberto, Macina, Daniela, Mallick, Amod Kishore, Marganiec, Justyna, Martı́nez, Trinitario, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mendoza Cembranos, Emilio, Mengoni, Alberto, Mingrone, Federica, Milazzo, Paolo Maria, Mirea, Mihail, Musumarra, Agatino, Negret, Alexandru, Nolte, Ralf, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Piersanti, Luciano, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Radeck, Désirée, Rauscher, Thomas, Reifarth, René, Riego Pérez, Albert, Robles Manzano, Maria Soledad, Rubbia, Carlo, Ryan, James A., Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schumann, Dorothea, Sedyshev, Pavel V., Smith, Alastair Gavin, Sosnin, Nikolay V., Stamatopoulos, Athanasios, Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Tarifeño-Saldivia, Ariel, Tassan-Got, Laurent, Tsinganis, Andrea, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Warren, Stephen J., Weiß, Christina, Woods, Philip John, Wright, Tobias, Žugec, Petar, Nuclear Physics in Astrophysics (Veranstaltung (8. : 2017 : Catania), Colonna, Nicola, Aberle, Oliver, Andrzejewski, Józef, Audouin, Laurent, Bacak, Michael, Balibrea Correa, Javier, Barbagallo, Massimo, Bečvář, František, Berthoumieux, Eric, Billowes, Jonathan, Bosnar, Damir, Brown, Adam, Caamaño, Manuel, Calviño Tavares, Francisco, Calviani, Marco, Cano-Ott, Daniel, Cardella, Roberto, Casanovas Hoste, Adrià, Cerutti, Francesco, Chen, Yonghao, Chiaveri, Enrico, Clai, Giulia, Cortés Rossell, Guillem Pere, Cortés-Giraldo, Miguel Antonio, Cosentino, Cristallo, Sergio, Damone, Lucia Anna, Diakaki, Maria, Domingo-Pardo, César, Dressler, Rugard, Dupont, Emmeric, Durán, Ignacio, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Ferreira, Pedro G., Finocchiaro, Paolo, Furman, Valter, Göbel, Kathrin, García Ríos, Aczel Regino, Gawlik, Aleksandra, Gilardoni, Simone, Glodariu, Tudor, Gonçalves, Isabel Maria Ferro, González Romero, Enrique Miguel, Griesmayer, Erich, Guerrero Sánchez, Carlos, Gunsing, Frank, Harada, Hideo, Heinitz, Stephan, Hernández Prieto, Álvaro, Heyse, Jan, Jenkins, David, Jericha, Erwin, Käppeler, Franz, Kadi, Yacine, Kalamara, Antigoni, Kavrigin, Pavel, Kimura, Atsushi, Kivel, Nikolay, Kokkoris, Michael, Kroll, Jiří, Krtička, Milan, Kurtulgil, Cem Deniz, Langer, Christoph, Leal Cidoncha, Esther, Lederer, Claudia, Lerendegui-Marco, Jorge, Leeb, Helmut, Lo Meo, Sergio, Lonsdale, Sarah Jane, Losito, Roberto, Macina, Daniela, Mallick, Amod Kishore, Marganiec, Justyna, Martı́nez, Trinitario, Masi, Alessandro, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Maugeri, Emilio Andrea, Mazzone, Annamaria, Mendoza Cembranos, Emilio, Mengoni, Alberto, Mingrone, Federica, Milazzo, Paolo Maria, Mirea, Mihail, Musumarra, Agatino, Negret, Alexandru, Nolte, Ralf, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Piersanti, Luciano, Porras Sánchez, José Ignacio, Praena, Javier, Quesada Molina, José Manuel, Radeck, Désirée, Rauscher, Thomas, Reifarth, René, Riego Pérez, Albert, Robles Manzano, Maria Soledad, Rubbia, Carlo, Ryan, James A., Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schumann, Dorothea, Sedyshev, Pavel V., Smith, Alastair Gavin, Sosnin, Nikolay V., Stamatopoulos, Athanasios, Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Tarifeño-Saldivia, Ariel, Tassan-Got, Laurent, Tsinganis, Andrea, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Warren, Stephen J., Weiß, Christina, Woods, Philip John, Wright, Tobias, and Žugec, Petar

Abstract

An important experimental program on Nuclear Astrophysics is being carried out at the n_TOF since several years, in order to address the still open issues in stellar and primordial nucleosynthesis. Several neutron capture reactions relevant to s-process nucleosynthesis have been measured so far, some of which on important branching point radioisotopes. Furthermore, the construction of a second experimental area has recently opened the way to challenging measurements of (n, charged particle) reactions on isotopes of short half-life. The Nuclear Astrophysics program of the n_TOF Collaboration is here described, with emphasis on recent results relevant for stellar nucleosynthesis, stellar neutron sources and primordial nucleosynthesis.

Published
2017

14. The CERN n_TOF facility: a unique tool for nuclear data measurement

Author

International Workshop on Compound-Nuclear Reactions and Related Topics (5. : 2016 : Tokio), Mingrone, Federica, Aberle, Oliver, Andrzejewski, Józef, Audouin, Laurent, Bécares, Vicente, Bacak, Michael, Balibrea Correa, Javier, Barbagallo, Massimo, Barros, Susana C.C., Bečvář, František, Beinrucker, Clemens, Berthoumieux, Eric, Billowes, Jonathan, Bosnar, Damir, Brugger, Markus, Caamaño, Manuel, Calviño Tavares, Francisco, Calviani, Marco, Cano-Ott, Daniel, Cardella, Roberto, Casanovas Hoste, Adrià, Castelluccio, Donato Maurizio, Cerutti, Francesco, Chen, Yonghao, Chiaveri, Enrico, Colonna, Nicola, Cortés-Giraldo, Miguel Antonio, Cortés Rossell, Guillem Pere, Cosentino, Luigi, Damone, Lucia Anna, Diakaki, Maria, Domingo-Pardo, César, Dressler, Rugard, Dupont, Emmeric, Durán, Ignacio, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Ferreira, Pedro G., Finocchiaro, Paolo, Furman, Valter, Ganesan, Srinivasan, García Ríos, Aczel Regino, Gawlik, Aleksandra, Gheorghe, Ioana, Glodariu, Tudor, Gonçalves, Isabel Maria Ferro, González Romero, Enrique Miguel, Goverdovski, Andrey, Griesmayer, Erich, Guerrero Sánchez, Carlos, Gunsing, Frank, Göbel, Kathrin, Harada, Hideo, Heftrich, Tanja, Heinitz, Stephan, Heyse, Jan, Jenkins, David, Jericha, Erwin, Käppeler, Franz, Kadi, Yacine, Katabuchi, Tatsuya, Kavrigin, Pavel, Ketlerov, Vladimir, Khryachkov, Vitaly, Kimura, Atsushi, Kivel, Nikolay, Kokkoris, Michael, Krtička, Milan, Leal Cidoncha, Esther, Lederer, Claudia, Leeb, Helmut, Lerendegui, Jorge, Lo Meo, Sergio, Lonsdale, Sarah Jane, Losito, Roberto, Macina, Daniela, Marganiec, Justyna, Martínez, Trinitario, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Matteucci, Francesca, Maugeri, Emilio Andrea, Mendoza Cembranos, Emilio, Mengoni, Alberto, Milazzo, Paolo Maria, Mirea, Mihail, Montesano, Simone, Musumarra, Agatino, Nolte, Ralf, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Praena, Javier, Quesada Molina, José Manuel, Rajeev, K., Rauscher, Thomas, Reifarth, René, Riego Pérez, Albert, Rout, Prakash Chandra, Rubbia, Carlo, Ryan, James A., Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schmidt, Stefan, Schumann, Dorothea, Sedyshev, Pavel V., Smith, Alastair Gavin, Stamatopoulos, Athanasios, Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Tarifeño-Saldivia, Ariel, Tassan-Got, Laurent, Tsinganis, Andrea, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Warren, Stephen J., Weigand, Mario, Weiß, Christina, Wolf, Clemens, Woods, Philip John, Wright, Tobias, Žugec, Petar, International Workshop on Compound-Nuclear Reactions and Related Topics (5. : 2016 : Tokio), Mingrone, Federica, Aberle, Oliver, Andrzejewski, Józef, Audouin, Laurent, Bécares, Vicente, Bacak, Michael, Balibrea Correa, Javier, Barbagallo, Massimo, Barros, Susana C.C., Bečvář, František, Beinrucker, Clemens, Berthoumieux, Eric, Billowes, Jonathan, Bosnar, Damir, Brugger, Markus, Caamaño, Manuel, Calviño Tavares, Francisco, Calviani, Marco, Cano-Ott, Daniel, Cardella, Roberto, Casanovas Hoste, Adrià, Castelluccio, Donato Maurizio, Cerutti, Francesco, Chen, Yonghao, Chiaveri, Enrico, Colonna, Nicola, Cortés-Giraldo, Miguel Antonio, Cortés Rossell, Guillem Pere, Cosentino, Luigi, Damone, Lucia Anna, Diakaki, Maria, Domingo-Pardo, César, Dressler, Rugard, Dupont, Emmeric, Durán, Ignacio, Fernández Domínguez, Beatriz, Ferrari, Alfredo, Ferreira, Pedro G., Finocchiaro, Paolo, Furman, Valter, Ganesan, Srinivasan, García Ríos, Aczel Regino, Gawlik, Aleksandra, Gheorghe, Ioana, Glodariu, Tudor, Gonçalves, Isabel Maria Ferro, González Romero, Enrique Miguel, Goverdovski, Andrey, Griesmayer, Erich, Guerrero Sánchez, Carlos, Gunsing, Frank, Göbel, Kathrin, Harada, Hideo, Heftrich, Tanja, Heinitz, Stephan, Heyse, Jan, Jenkins, David, Jericha, Erwin, Käppeler, Franz, Kadi, Yacine, Katabuchi, Tatsuya, Kavrigin, Pavel, Ketlerov, Vladimir, Khryachkov, Vitaly, Kimura, Atsushi, Kivel, Nikolay, Kokkoris, Michael, Krtička, Milan, Leal Cidoncha, Esther, Lederer, Claudia, Leeb, Helmut, Lerendegui, Jorge, Lo Meo, Sergio, Lonsdale, Sarah Jane, Losito, Roberto, Macina, Daniela, Marganiec, Justyna, Martínez, Trinitario, Massimi, Cristian, Mastinu, Pierfrancesco, Mastromarco, Mario, Matteucci, Francesca, Maugeri, Emilio Andrea, Mendoza Cembranos, Emilio, Mengoni, Alberto, Milazzo, Paolo Maria, Mirea, Mihail, Montesano, Simone, Musumarra, Agatino, Nolte, Ralf, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Praena, Javier, Quesada Molina, José Manuel, Rajeev, K., Rauscher, Thomas, Reifarth, René, Riego Pérez, Albert, Rout, Prakash Chandra, Rubbia, Carlo, Ryan, James A., Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schmidt, Stefan, Schumann, Dorothea, Sedyshev, Pavel V., Smith, Alastair Gavin, Stamatopoulos, Athanasios, Tagliente, Giuseppe, Taı́n Enríquez, José Luis, Tarifeño-Saldivia, Ariel, Tassan-Got, Laurent, Tsinganis, Andrea, Valenta, Stanislav, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Warren, Stephen J., Weigand, Mario, Weiß, Christina, Wolf, Clemens, Woods, Philip John, Wright, Tobias, and Žugec, Petar

Abstract

he study of the resonant structures in neutron-nucleus cross-sections, and therefore of the compound-nucleus reaction mechanism, requires spectroscopic measurements to determine with high accuracy the energy of the neutron interacting with the material under study. To this purpose, the neutron time-of-flight facility n_TOF has been operating since 2001 at CERN. Its characteristics, such as the high intensity instantaneous neutron flux, the wide energy range from thermal to few GeV, and the very good energy resolution, are perfectly suited to perform high-quality measurements of neutron-induced reaction cross sections. The precise and accurate knowledge of these cross sections plays a fundamental role in nuclear technologies, nuclear astrophysics and nuclear physics. Two different measuring stations are available at the n_TOF facility, called EAR1 and EAR2, with different characteristics of intensity of the neutron flux and energy resolution. These experimental areas, combined with advanced detection systems lead to a great flexibility in performing challenging measurement of high precision and accuracy, and allow the investigation isotopes with very low cross sections, or available only in small quantities, or with very high specific activity. The characteristics and performances of the two experimental areas of the n_TOF facility will be presented, together with the most important measurements performed to date and their physics case. In addition, the significant upcoming measurements will be introduced.

Published
2016

15. Adsorption of volatile polonium and bismuth species on metals in various gas atmospheres: Part I - Adsorption of volatile polonium and bismuth on gold

Author

Maugeri, Emilio Andrea, Neuhausen, Jörg, Eichler, Robert, Dressler, Rugard, Rijpstra, Kim, Cottenier, Stefaan, Piguet, David, Vögele, Alexander, Schumann, Dorothea, Maugeri, Emilio Andrea, Neuhausen, Jörg, Eichler, Robert, Dressler, Rugard, Rijpstra, Kim, Cottenier, Stefaan, Piguet, David, Vögele, Alexander, and Schumann, Dorothea

Abstract

Polonium isotopes are considered the most hazardous radionuclides produced during the operation of accelerator driven systems (ADS) when lead-bismuth eutectic (LBE) is used as the reactor coolant and as the spallation target material. In this work the use of gold surfaces for capturing polonium from the cover gas of the ADS reactor was studied by thermochromatography. The results show that gaseous monoatomic polonium, formed in dry hydrogen, is adsorbed on gold at 1058 K. Its adsorption enthalpy was calculated as -250±7 kJ mol−1, using a Monte Carlo simulation code. Highly volatile polonium species that were observed in similar experiments in fused silica columns in the presence of moisture in both inert and reducing gas were not detected in the experiments studying adsorption on gold surfaces. PoO2 is formed in both dry and moist oxygen, and its interaction with gold is characterized by transport reactions. The interaction of bismuth, present in large amounts in the atmosphere of the ADS, with gold was also evaluated. It was found that bismuth has a higher affinity for gold, compared to polonium, in an inert, reducing, and oxidizing atmosphere. This fact must be considered when using gold as a material for filtering polonium in the cover gas of ADS.

16. Adsorption of volatile polonium species on metals in various gas atmospheres: Part II - Adsorption of volatile polonium on platinum, silver and palladium

Author

Maugeri, Emilio Andrea, Neuhausen, Jörg, Misiak, Ryszard, Eichler, Robert, Dressler, Rugard, Piguet, David, Vögele, Alexander, Schumann, Dorothea, Maugeri, Emilio Andrea, Neuhausen, Jörg, Misiak, Ryszard, Eichler, Robert, Dressler, Rugard, Piguet, David, Vögele, Alexander, and Schumann, Dorothea

Abstract

This work presents the results obtained from studying the interaction between polonium compounds formed in different atmospheres and platinum, palladium and silver surfaces obtained by thermochromatography. These results are of crucial importance for the design of cover gas filter systems for lead-bismuth eutectic (LBE)-based nuclear facilities such as accelerator driven systems (ADS). The results obtained from studying the interaction of polonium and platinum under inert atmosphere and reducing atmospheres with and without addition of moisture show that polonium is deposited at temperatures between 993 and 1221 K, with adsorption enthalpies ranging from -235 to -291 kJ mol−1, indicating a very strong adsorption of the polonium species present on platinum surfaces. The interaction between polonium and silver was investigated using purified inert, reducing and oxidizing carrier gases. Results show a deposition temperature between 867 and 990 K, with adsorption enthalpies ranging from -205 to -234 kJ mol−1. The interaction of polonium and palladium was studied in purified helium and purified hydrogen. For both conditions a deposition temperature of 1221 K was observed corresponding to an adsorption enthalpy of -340 kJ mol−1. No highly volatile polonium species was formed at any of the applied experimental conditions.

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