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Accurate measurement of the standard 235U(n,f) cross section from thermal to 170 keV neutron energy
(2020)
Amaducci, Simone ; 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 ; Colonna, Nicola ; Cortés Rossell, Guillem Pere ; Cortés-Giraldo, Miguel Antonio ; 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 ; 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 ; Heyse, Jan ; Jenkins, David ; Jericha, Erwin ; Käppeler, Franz ; Kadi, Yacine ; Kalamara, Antigoni ; Kavrigin, Pavel ; Kimura, Atsushi ; Kivel, Nikolay ; Knapová, Ingrid ; Kokkoris, Michael ; 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 ; Patronis, Nikolas ; 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. ; 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 ; 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
An accurate measurement of the 235U(n,f) cross section from thermal to 170 keV of neutron energy has recently been performed at n_TOF facility at CERN using 6Li(n,t)4He and 10B(n,α)7Li as references. This measurement has been carried out in order to investigate a possible overestimation of the 235U fission cross section evaluation provided by most recent libraries between 10 and 30 keV. A custom experimental apparatus based on in-beam silicon detectors has been used, and a Monte Carlo simulation in GEANT4 has been employed to characterize the setup and calculate detectors efficiency. The results evidenced the presence of an overestimation in the interval between 9 and 18 keV and the new data may be used to decrease the uncertainty of 235U(n,f) cross section in the keV region.
Chen, Yong Hao ; Tassan-Got, Laurent ; Audouin, Laurent ; Le Naour, Claire ; Durán, Ignacio ; Casarejos Ruiz, Enrique ; Aberle, Oliver ; Andrzejewski, Józef ; 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 ; Chiaveri, Enrico ; Colonna, Nicola ; Cortés Rossell, Guillem Pere ; Cortés-Giraldo, Miguel Antonio ; Cosentino, Luigi ; Damone, Lucia Anna ; Diakaki, Maria ; Domingo-Pardo, César ; Dressler, Rugard ; Dupont, Emmeric ; Fernández Domínguez, Beatriz ; Ferrari, Alfredo ; Ferreira, Pedro G. ; Finocchiaro, Paolo ; Furman, Valter ; Göbel, Kathrin ; Gómez Hornillos, María Belén ; García Ríos, Aczel Regino ; Gawlik, Aleksandra ; Glodariu, Tudor ; Gonçalves, Isabel Maria Ferro ; González Romero, Enrique Miguel ; Goverdovski, Andrey ; Griesmayer, Erich ; Guerrero Sánchez, Carlos ; Gunsing, Frank ; 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-Marco, Jorge ; Lo Meo, Sergio ; Lonsdale, Sarah Jane ; Losito, Roberto ; Macina, Daniela ; Marganiec, Justyna ; Martı́nez, Trinitario ; Massimi, Cristian ; Mastinu, Pierfrancesco ; Mastromarco, Mario ; Matteucci, Francesca ; Maugeri, Emilio Andrea ; Mendoza Cembranos, Emilio ; Mengoni, Alberto ; Milazzo, Paolo Maria ; Mingrone, Federica ; Mirea, Mihail ; Montesano, Simone ; Musumarra, Agatino ; Nolte, Ralf ; Oprea, Andreea ; Patronis, Nikolas ; Pavlik, Andreas ; Perkowski, Jarosław ; Porras Sánchez, José Ignacio ; Praena, Javier ; Quesada Molina, José Manuel ; Rajeev, K. ; Rauscher, Thomas ; Reifarth, René ; Riego Pérez, Albert ; Robles Manzano, Maria Soledad ; 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 ; 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
The experimental area 2 (EAR-2) at CERNs neutron time-of-flight facility (n_TOF), which is operational since 2014, is designed and built as a short-distance complement to the experimental area 1 (EAR-1). The Parallel Plate Avalanche Counter (PPAC) monitor experiment was performed to characterize the beam pro↓le and the shape of the neutron 'ux at EAR-2. The prompt γ-flash which is used for calibrating the time-of-flight at EAR-1 is not seen by PPAC at EAR-2, shedding light on the physical origin of this γ-flash.
Babiano Suarez, Victor ; Balibrea Correa, Javier ; Caballero Ontanaya, Luis ; Domingo-Pardo, César ; Ladarescu, Ion ; Lerendegui-Marco, Jorge ; Taı́n Enríquez, José Luis ; Calviño Tavares, Francisco ; Casanovas Hoste, Adrià ; Tarifeño-Saldivia, Ariel ; Guerrero Sánchez, Carlos ; Aberle, Oliver ; Alcayne, Victor ; Amaducci, Simone ; Andrzejewski, Józef ; Audouin, Laurent ; Bacak, Michael ; Barbagallo, Massimo ; Bennett, Samuel ; Berthoumieux, Eric ; Billowes, Jonathan ; Bosnar, Damir ; Brown, Adam ; Busso, Maurizio ; Caamaño, Manuel ; Calviani, Marco ; Cano-Ott, Daniel ; 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 ; Dressler, Rugard ; Ducasse, Quentin ; Dupont, Emmeric ; Durán, Ignacio ; Eleme, Zinovia ; Fernández Domínguez, Beatriz ; Ferrari, Alfredo ; Finocchiaro, Paolo ; Furman, Valter ; Göbel, Kathrin ; Garg, Ruchi ; Gawlik-Ramiega, Aleksandra ; Gilardoni, Simone ; Gonçalves, Isabel Maria Ferro ; González Romero, Enrique Miguel ; Gunsing, Frank ; Harada, Hideo ; Heinitz, Stephan ; Heyse, Jan ; Jenkins, David ; Junghans, Arnd Rudolf ; Käppeler, Franz ; Kadi, Yacine ; Kimura, Atsushi ; Knapová, Ingrid ; Kokkoris, Michael ; Kopatch, Yuri N. ; Krtička, Milan ; Kurtulgil, Cem Deniz ; Lederer-Woods, Claudia ; Leeb, Helmut ; 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 ; Mingrone, Federica ; Moreno-Soto, Javier ; Musumarra, Agatino ; Negret, Alexandru ; Nolte, Ralf ; Ogállar Ruiz, Francisco ; Oprea, Andreea ; Patronis, Nikolas ; Pavlik, Andreas ; Perkowski, Jarosław ; Piersanti, Luciano ; Petrone, Cristina ; Pirovano, Elisa ; Porras Sánchez, José Ignacio ; Praena, Javier ; Quesada Molina, José Manuel ; Ramos Doval, Diego ; Rauscher, Thomas ; Reifarth, René ; Rochman, Dimitri ; Romanets, Y. ; 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 ; Tassan-Got, Laurent ; Thomas, Th. ; Torres-Sánchez, Pablo ; 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
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
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.
Bacak, Michael ; Aïche, Mourad ; Bélier, Gilbert ; Berthoumieux, Eric ; Diakaki, Maria ; Dupont, Emmeric ; Gunsing, Frank ; Heyse, Jan ; Kopecky, Stefan ; Krtička, Milan ; Laurent, Benoit ; Leeb, Helmut ; Mathieu, Ludovic ; Schillebeeckx, Peter ; Serot, Olivier ; Taieb, Julien ; Valenta, Stanislav ; Vlachoudis, Vasilis ; Aberle, Oliver ; Andrzejewski, Józef ; Audouin, Laurent ; Balibrea Correa, Javier ; Barbagallo, Massimo ; Bečvář, František ; 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 ; Colonna, Nicola ; Cortés Rossell, Guillem Pere ; Cortés-Giraldo, Miguel Antonio ; Cosentino, Luigi ; Damone, Lucia Anna ; Domingo-Pardo, César ; Dressler, Rugard ; 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 ; Harada, Hideo ; Heinitz, Stephan ; Jenkins, David ; Jericha, Erwin ; Käppeler, Franz ; Kadi, Yacine ; Kalamara, Antigoni ; Kavrigin, Pavel ; Kimura, Atsushi ; Kivel, Nikolay ; Knapová, Ingrid ; Kokkoris, Michael ; Kurtulgil, Cem Deniz ; Leal Cidoncha, Esther ; Lederer, Claudia ; 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 ; Patronis, Nikolas ; 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. ; Sabaté-Gilarte, Marta ; Saxena, Alok ; 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 ; Vannini, Gianni ; Variale, Vincenzo ; Vaz, Pedro ; Ventura, Alberto ; Vlastou, Rosa ; Wallner, Anton ; Warren, Stephen J. ; Weiß, Christina ; Woods, Philip John ; Wright, Tobias ; Žugec, Petar
233U is the fissile nuclei in the Th-U fuel cycle with a particularily small neutron capture cross setion which is on average about one order of magnitude lower than its fission cross section. Hence, the measurement of the 233U(n, γ) cross section relies on a method to accurately distinguish between capture and fission γ-rays. A measurement of the 233U α-ratio has been performed at the n_TOF facility at CERN using a so-called fission tagging setup, coupling n_TOF 's Total Absorption Calorimeter with a novel fission chamber to tag the fission γ-rays. The experimental setup is described and essential parts of the analysis are discussed. Finally, a preliminary 233U α-ratio is presented.
Massimi, Cristian ; 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 ; Castelluccio, Donato Maurizio ; Cerutti, Francesco ; Chen, Yonghao ; Chiaveri, Enrico ; Clai, Giulia ; Colonna, Nicola ; Console Camprini, P. ; Cortés Rossell, Guillem Pere ; Cortés-Giraldo, Miguel Antonio ; 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 ; 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 ; Guglielmelli, A. ; Gunsing, Frank ; Harada, Hideo ; Heinitz, Stephan ; Heyse, Jan ; Jenkins, David ; Jericha, Erwin ; Käppeler, Franz ; Kadi, Yacine ; Kalamara, Antigoni ; Kavrigin, Pavel ; Kimura, Atsushi ; Kivel, Nikolay ; Knapová, Ingrid ; Kokkoris, Michael ; Krtička, Milan ; Kurtulgil, Cem Deniz ; Leal Cidoncha, Esther ; Lederer, Claudia ; Leeb, Helmut ; Lerendegui-Marco, Jorge ; Lonsdale, Sarah Jane ; Macina, Daniela ; Manna, Alice ; Marganiec, Justyna ; Martı́nez, Trinitario ; Masi, Alessandro ; Mastinu, Pierfrancesco ; Mastromarco, Mario ; Maugeri, Emilio Andrea ; Mazzone, Annamaria ; Mendoza Cembranos, Emilio ; Mengoni, Alberto ; Milazzo, Paolo Maria ; Mingrone, Federica ; Mucciola, Riccardo ; Musumarra, Agatino ; Negret, Alexandru ; Nolte, Ralf ; Oprea, Andreea ; Patronis, Nikolas ; Pavlik, Andreas ; Perkowski, Jarosław ; Porras Sánchez, José Ignacio ; Praena, Javier ; Quesada Molina, José Manuel ; Radeck, Désirée ; Rauscher, Thomas ; Reifarth, René ; Rocchi, F. ; 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 ; Valenta, Stanislav ; Vannini, Gianni ; Variale, Vincenzo ; Vaz, Pedro ; Ventura, Alberto ; Vlachoudis, Vasilis ; Vlastou, Rosa ; Wallner, Anton ; Warren, Stephen J. ; Weiss, Christian ; Woods, Philip John ; Wright, Tobias ; Žugec, Petar
We have measured the capture cross section of the 155Gd and 157Gd isotopes between 0.025 eV and 1 keV. The capture events were recorded by an array of 4 C6D6 detectors, and the capture yield was deduced exploiting the total energy detection system in combination with the Pulse Height Weighting Techniques. Because of the large cross section around thermal neutron energy, 4 metallic samples of different thickness were used to prevent problems related to self-shielding. The samples were isotopically enriched, with a cross contamination of the other isotope of less than 1.14%. The capture yield was analyzed with an R-Matrix code to describe the cross section in terms of resonance parameters. Near thermal energies, the results are significantly different from evaluations and from previous time-of-flight experiments. The data from the present measurement at n_TOF are publicly available in the experimental nuclear reaction database EXFOR.
Leong, Lou Sai ; Tassan-Got, Laurent ; Tarrío Vilas, Diego ; Audouin, Laurent ; Paradela Dobarro, Carlos ; Durán, Ignacio ; Le Naour, Claire ; Altstadt, Sebastian ; Andrzejewsky, Jozef ; Barbagallo, Massimo ; Bécares, Vicente ; 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 ; 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 ; Jenkins, David ; Jericha, Erwin ; Kadi, E. ; Käppeler, Franz ; Karadimos, Dimitri ; Kivel, Nikolay ; Koehler, Paul ; Kokkoris, Michael ; Korschinek, Gunther ; Kroll, Jiří ; Krtička, Milan ; Langer, Christoph ; Lederer, Claudia ; Leeb, Helmut ; Losito, Roberto ; Manousos, Athanasios ; Marganiec, Justyna ; Massimi, Cristian ; Martı́nez, Trinitario ; Mastinu, Pierfrancesco ; Mastromarco, Mario ; Meaze, AKM Moinul Haque ; Mengon, A. ; Mendoza Cembranos, Emilio ; Milazzo, Paolo Maria ; Mingrone, T. ; Mirea, Mihail ; Mondelaers, Willy ; Pavlik, Andreas ; Perkowski, Jarosław ; Pignatari, Marco ; Plompen, Arjan J. M. ; Praena, Javier ; Quesada Molina, José Manuel ; Rauscher, Thomas ; Reifhart, R. ; Riego Pérez, Albert ; Roman, Faustin Laurenţiu ; Rubbia, Carlo ; Sarmento, Raul ; Schillebeeckx, Peter ; Schmidt, Stefan ; Schumann, Dorothea ; Taı́n Enríquez, Jose Luis ; Tagliente, Giuseppe ; Tsinganis, Andrea ; Valenta, Stanislav ; Vannini, Gianni ; Variale, Vincenzo ; Vaz, Pedro ; Ventura, Alberto ; Versaci, Roberto ; Vermeulen, Mark J. ; Vlachoudis, Vasilis ; Vlastou, V. ; Wallner, Anton ; Ware, Timothy ; Weigand, Mario ; Weiß, Christina ; Wright, Tobias ; Žugec, Petar
Above 1 MeV of incident neutron energy the fission fragment angular distribution (FFAD) has generally a strong anisotropic behavior due to the combination of the incident orbital momentum and the intrinsic spin of the fissioning nucleus. This effect has to be taken into account for the efficiency estimation of devices used for fission cross section measurements. In addition it bears information on the spin deposition mechanism and on the structure of transitional states. We designed and constructed a detection device, based on Parallel Plate Avalanche Counters (PPAC), for measuring the fission fragment angular distributions of several isotopes, in particular 232Th. The measurement has been performed at n_TOF at CERN taking advantage of the very broad energy spectrum of the neutron beam. Fission events were recognized by back to back detection in coincidence in two position-sensitive detectors surrounding the targets. The detection efficiency, depending mostly on the stopping of fission fragments in backings and electrodes, has been computed with a Geant4 simulation and validated by the comparison to the measured case of 235U below 3 keV where the emission is isotropic. In the case of 232Th, the result is in good agreement with previous data below 10 MeV, with a good reproduction of the structures associated to vibrational states and the opening of second chance fission. In the 14 MeV region our data are much more accurate than previous ones which are broadly scattered.
Oprea, Andreea ; Gunsing, Frank ; Schillebeeckx, Peter ; Aberle, Oliver ; Bacak, Michael ; Berthoumieux, Eric ; Cano-Ott, Daniel ; Diakaki, Maria ; Dupont, Emmeric ; Geslot, Benoit ; Glodariu, Tudor ; Heyse, Jan ; Mendoza Cembranos, Emilio ; Negret, Alexandru ; Alcayne, Victor ; Amaducci, Simone ; Andrzejewski, Józef ; Audouin, Laurent ; Bécares, Vicente ; Babiano Suarez, Victor ; Barbagallo, Massimo ; Bečvář, František ; Bellia, Giorgio ; 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 ; Dietz, Mirco ; Domingo-Pardo, César ; Dressler, Rugard ; Durán, Ignacio ; Eleme, Zinovia ; Fernández Domínguez, Beatriz ; Ferrari, Alfredo ; Finocchiaro, Paolo ; Furman, Valter ; Göbel, Kathrin ; Garg, Ruchi ; Gawlik, Aleksandra ; Gilardoni, Simone ; Gonçalves, Isabel Maria Ferro ; González Romero, Enrique Miguel ; Guerrero Sánchez, Carlos ; Harada, Hideo ; Heinitz, Stephan ; Jenkins, David ; Jericha, Erwin ; Käppeler, Franz ; Kadi, Yacine ; Kimura, Atsushi ; 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 ; Nolte, Ralf ; Ogállar Ruiz, Francisco ; 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 ; Schumann, Dorothea ; Smith, Alastair Gavin ; Sosnin, Nikolay V. ; Stamatopoulos, Athanasios ; Tagliente, Giuseppe ; Taı́n Enríquez, José Luis ; Talip, T. ; 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 ; Žugec, Petar
Neutron capture on 241Am plays an important role in the nuclear energy production and also provides valuable information for the improvement of nuclear models and the statistical interpretation of the nuclear properties. A new experiment to measure the 241Am(n, γ) cross section in the thermal region and the first few resonances below 10 eV has been carried out at EAR2 of the n_TOF facility at CERN. Three neutron-insensitive C6D6 detectors have been used to measure the neutron-capture gamma cascade as a function of the neutron time of flight, and then deduce the neutron capture yield. Preliminary results will be presented and compared with previously obtained results at the same facility in EAR1. In EAR1 the gamma-ray background at thermal energies was about 90% of the signal while in EAR2 is up to a 25 factor much more favorable signal to noise ratio. We also extended the low energy limit down to subthermal energies. This measurement will allow a comparison with neutron capture measurements conducted at reactors and using a different experimental technique.
Destruction of the cosmic γ-ray emitter 26Al in massive stars: study of the key 26Al(n,p) reaction
(2021)
Lederer-Woods, Claudia ; Woods, Philip John ; Davinson, Thomas ; Kahl, David ; Lonsdale, Sarah Jane ; Aberle, Oliver ; Amaducci, Simone ; 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 ; Colonna, Nicola ; Cortés Rossell, Guillem Pere ; Cortés-Giraldo, Miguel Antonio ; Cosentino, Luigi ; Cristallo, Sergio ; Damone, Lucia Anna ; Diakaki, Maria ; Domingo-Pardo, César ; Dressler, Rugard ; Dupont, Emmeric ; Durán, Ignacio ; Fernández Domínguez, Beatriz ; Ferrari, Alfredo ; Ferreira, Paulo ; Ferrer, Francisco Javier ; 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 ; Heyse, Jan ; Jenkins, David ; Jericha, Erwin ; Käppeler, Franz ; Kadi, Yacine ; Kalamara, Antigoni ; Kavrigin, Pavel ; Kimura, Atsushi ; Kivel, Nikolay ; Kokkoris, Michael ; Krtička, Milan ; Kurtulgil, Cem Deniz ; Leal Cidoncha, Esther ; Leeb, Helmut ; Lerendegui-Marco, Jorge ; Lo Meo, Sergio ; Macina, Daniela ; Manna, Alice ; Marganiec, Justyna ; Martínez, 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 ; Patronis, Nikolas ; 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. ; Sabaté-Gilarte, Marta ; Saxena, Alok ; Schillebeeckx, Peter ; Schumann, Dorothea ; Sedyshev, Pavel V. ; Smith, Alastair G. ; Sosnin, Nikolay V. ; Stamatopoulos, Athanasios ; Tagliente, Giuseppe ; Taı́n Enríquez, José Luis ; Tarifeño-Saldivia, Ariel ; Tassan-Got, Laurent ; Valenta, Stanislav ; Vannini, Gianni ; Variale, Vincenzo ; Vaz, Pedro ; Ventura, Alberto ; Vlachoudis, Vasilis ; Vlastou, Rosa ; Wallner, Anton ; Warren, Stuart ; Weß, Christina ; Wright, Tobias ; Žugec, Petar
The 26Al(n,p)26Mg reaction is the key reaction impacting on the abundances of the cosmic γ-ray emitter 26Al produced in massive stars and impacts on the potential pollution of the early solar system with 26Al by asymptotic giant branch stars. We performed a measurement of the 26Al(n,p)26Mg cross section at the high-flux beam line EAR-2 at the n_TOF facility (CERN). We report resonance strengths for eleven resonances, nine being measured for the first time, while there is only one previous measurement for the other two. Our resonance strengths are significantly lower than the only previous values available. Our cross-section data range to 150 keV neutron energy, which is sufficient for a reliable determination of astrophysical reactivities up to 0.5 GK stellar temperature.
Mingrone, Federica ; Massimi, Cristian ; Vannini, Gianni ; Altstadt, Sebastian ; Andrzejewski, Józef ; Audouin, Ludmila ; Barbagallo, Massimo ; 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, Mary ; Colonna, Nicola ; 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 ; Griesmayer, Erich ; Guerrero Sánchez, Carlos ; Gunsing, Frank ; Hernández Prieto, Álvaro ; Jenkins, David ; Jericha, Erwin ; Kadi, Yacine ; Käppeler, Franz ; Karadimos, Dimitri ; Kivel, Nikolay ; Koehler, Paul Edward ; Krtička, Milan ; Kroll, Jiří ; Lampoudis, Christos ; Langer, Christoph ; Leal Cidoncha, Esther ; Lederer, Claudia ; Leeb, Helmut ; Leong, Lou Sai ; Losito, Roberto ; Mallick, Amod Kishore ; Manousos, Athanasios ; Marganiec, Justyna ; Martínez, Trinitario ; Mastinu, Pierfrancesco ; Mastromarco, Mario ; Mendoza Cembranos, Emilio ; Mengoni, Alberto ; Milazzo, Paolo Maria ; 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 ; Robles, Marisol S. ; Rubbia, Carlo ; Sabaté Gilarte, Marta ; Sarmento, Raul ; Saxena, Alok ; Schillebeeckx, Peter ; Schmidt, Sebastian ; Schumann, Dorothea ; Tagliente, Giuseppe ; Taı́n Enríquez, José Luis ; Tarrío Vilas, Diego ; Tassan-Got, Laurent ; Tsinganis, Andrea ; Valenta, Stanislav ; 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 radiative capture cross section of 238U is very important for the developing of new reactor technologies and the safety of existing ones. Here the preliminary results of the 238U(n,γ) cross section measurement performed at n_TOF with C6D6 scintillation detectors are presented, paying particular attention to data reduction and background subtraction.