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1. Astrophysics at n_TOF facility

Author

G. Tagliente, U. Abbondanno, G. Aerts, H. Alvarez, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Becvar, F. Belloni, E. Berthoumieux, S. Bisterzo, F. Calvino, M. Calviani, D. Cano-Ott, R. Capote, C. Carrapico, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillman, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadis, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marques, K. Fujii, W. Furman, R. Gallino, I. Goncalves, E. Gonzalez-Romero, F. Gramegna, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, E. Jericha, F. Kappeler, Y. Kadi, D. Karadimos, D. Karamanis, M. Kerveno, P. Koehler, E. Kossionides, M. Krticka, C. Lamboudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martinez, C. Massimi, P. Mastinu, A. Mengoni, P. M.Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O'Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulos, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santos, L. Sarchiapone, I. Savvidis, C. Stephan, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, H. Wendler, M. Wiescher, K. Wisshak

Subjects
Astrophysics, r-process., Atomic physics. Constitution and properties of matter, QC170-197
Abstract

The neutron time of flight (n_TOF) facility at CERN is a neutron spallation source, its white neutron energy spectrum ranges from thermal to several GeV, covering the full energy range of interest for nuclear astrophysics, in particular for measurements of the neutron capture cross-section required in s-process nucleosynthesis. This contribution gives an overview on the astrophysical program made at n_TOF facility, the results and the implications will be considered.

Published
2009
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2. Neutron-induced fission cross section of U-234 measured at the CERN n_TOF facility

Author

D. Karadimos, R. Vlastou, K. Ioannidis, P. Demetriou, M. Diakaki, V. Vlachoudis, P. Pavlopoulos, V. Konovalov, U. Abbondanno, G. Aerts, H. Alvarez, F. Alvarez Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Becvar, E. Berthoumieux, F. Calvino, D. Cano Ott, R. Capote, A. C. de, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, S. David, R. Dolfini, C. Domingo Pardo, A. Dorochenko, W. Dridi, I. Duran, C. Eleftheriadis, M. Embid Segura, L. Ferrant, A. Ferrari, R. Ferreira Marques, L. Fitzpatrick, H. Frais Koelbl, K. Fuji, W. Furman, I. Goncalves, R. Gallino, P. Cennini, E. Gonzalez Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera Martinez, M. Igashira, S. Isaev, E. Jericha, Y. Kadi, F. Kaeppeler, D. Karamanis, M. Kerveno, V. Ketlerov, P. Koehler, D. Kolokolov, M. Krticka, C. Lamboudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, L. Marques, S. Marrone, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O'Brien, M. Oshima, J. Pancin, C. Papadopoulos, C. Paradela, N. Patronis, A. Pavlik, L. Perrot, R. Plag, A. Plompen, A. Plukis, A. Poch, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, L. Sarchiapone, I. Savvidis, M. Sedysheva, K. Stamoulis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan Got, L. Tavora, R. Terlizzi, A. Tsinganis, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, F. Voss, H. Wendler, M. Wiescher, K. Wisshak, MASSIMI, CRISTIAN, VANNINI, GIANNI, D. Karadimo, R. Vlastou, K. Ioannidi, P. Demetriou, M. Diakaki, V. Vlachoudi, P. Pavlopoulo, V. Konovalov, U. Abbondanno, G. Aert, H. Alvarez, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulo, L. Audouin, G. Badurek, P. Baumann, F. Becvar, E. Berthoumieux, F. Calvino, D. Cano-Ott, R. Capote, A. C. de, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, A. Couture, J. Cox, S. David, R. Dolfini, C. Domingo-Pardo, A. Dorochenko, W. Dridi, I. Duran, C. Eleftheriadi, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marque, L. Fitzpatrick, H. Frais-Koelbl, K. Fuji, W. Furman, I. Goncalve, R. Gallino, P. Cennini, E. Gonzalez-Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, C. Guerrero, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, S. Isaev, E. Jericha, Y. Kadi, F. Kaeppeler, D. Karamani, M. Kerveno, V. Ketlerov, P. Koehler, D. Kolokolov, M. Krticka, C. Lamboudi, H. Leeb, A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, L. Marque, S. Marrone, C. Massimi, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O'Brien, M. Oshima, J. Pancin, C. Papadopoulo, C. Paradela, N. Patroni, A. Pavlik, L. Perrot, R. Plag, A. Plompen, A. Pluki, A. Poch, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, L. Sarchiapone, I. Savvidi, M. Sedysheva, K. Stamouli, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, A. Tsingani, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, F. Vo, H. Wendler, M. Wiescher, and K. Wisshak

Subjects
MINOR ACTINIDES TRANSMUTATIONS, Nuclear Experiment, NEUTRON TIME OF FLIGHT, NEUTRON INDUCED FISSION
Abstract

The neutron-induced fission cross section of U234 has been measured at the CERN n_TOF facility relative to the standard fission cross section of U235 from 20 keV to 1.4 MeV and of U238 from 1.4 to 200 MeV. A fast ionization chamber (FIC) was used as a fission fragment detector with a detection efficiency of no less than 97%. The high instantaneous flux and the low background characterizing the n_TOF facility resulted in wide-energy-range data (0.02 to 200 MeV), with high energy resolution, high statistics, and systematic uncertainties bellow 3%. Previous investigations around the energy of the fission threshold revealed structures attributed to β-vibrational levels, which have been confirmed by the present measurements. Theoretical calculations have been performed, employing the talys code with model parameters tuned to fairly reproduce the experimental data.

Published
2014

3. Measurement and analysis of the Am-243 neutron capture cross section at the n_TOF facility at CERN

Author

E. Mendoza, D. Cano Ott, C. Guerrero, E. Berthoumieux, U. Abbondanno, G. Aerts, F. Alvarez Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, J. Balibrea, P. Baumann, F. Becvar, F. Belloni, F. Calvino, M. Calviani, R. Capote, C. Carrapico, A. C. de, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillmann, R. Dolfini, C. Domingo Pardo, W. Dridi, I. Duran, C. Eleftheriadis, L. Ferrant, A. Ferrari, R. Ferreira Marques, L. Fitzpatrick, H. Frais Koelbl, K. Fujii, W. Furman, I. Goncalves, E. Gonzalez Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera Martinez, M. Igashira, S. Isaev, E. Jericha, F. Kaeppeler, Y. Kadi, D. Karadimos, D. Karamanis, V. Ketlerov, M. Kerveno, P. Koehler, V. Konovalov, E. Kossionides, M. Krticka, C. Lampoudis, H. Leeb, A. Lindote, S. L. Meo, I. Lopes, R. Lossito, M. Lozano, S. Lukic, J. Marganiec, L. Marques, S. Marrone, T. Martinez, MASSIMI, CRISTIAN, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O'Brien, M. Oshima, J. Pancin, C. Papachristodoulou, C. Papadopoulos, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santos, L. Sarchiapone, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan Got, L. Tavora, R. Terlizzi, VANNINI, GIANNI, P. Vaz, A. Ventura, D. Villamarin, M. C. Vicente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, H. Wendler, M. Wiescher, K. Wisshak, E. Mendoza, D. Cano-Ott, C. Guerrero, E. Berthoumieux, U. Abbondanno, G. Aert, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulo, L. Audouin, G. Badurek, J. Balibrea, P. Baumann, F. Becvar, F. Belloni, F. Calvino, M. Calviani, R. Capote, C. Carrapico, A. C. de, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillmann, R. Dolfini, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadi, L. Ferrant, A. Ferrari, R. Ferreira-Marque, L. Fitzpatrick, H. Frais-Koelbl, K. Fujii, W. Furman, I. Goncalve, E. Gonzalez-Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, S. Isaev, E. Jericha, F. Kaeppeler, Y. Kadi, D. Karadimo, D. Karamani, V. Ketlerov, M. Kerveno, P. Koehler, V. Konovalov, E. Kossionide, M. Krticka, C. Lampoudi, H. Leeb, A. Lindote, S. L. Meo, I. Lope, R. Lossito, M. Lozano, S. Lukic, J. Marganiec, L. Marque, S. Marrone, T. Martinez, C. Massimi, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O'Brien, M. Oshima, J. Pancin, C. Papachristodoulou, C. Papadopoulo, C. Paradela, N. Patroni, A. Pavlik, P. Pavlopoulo, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Pluki, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santo, L. Sarchiapone, I. Savvidi, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vicente, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, H. Wendler, M. Wiescher, and K. Wisshak

Subjects
RADIATIVE NEUTRON CAPTURE, NEUTRON TIME OF FLIGHT
Abstract

Background: The design of new nuclear reactors and transmutation devices requires to reduce the present neutron cross section uncertainties of minor actinides. Purpose: Improvement of the Am243(n,γ) cross section uncertainty. Method: The Am243(n,γ) cross section has been measured at the n-TOF facility at CERN with a BaF2 total absorption calorimeter, in the energy range between 0.7 eV and 2.5 keV. Results: The Am243(n,γ) cross section has been successfully measured in the mentioned energy range. The resolved resonance region has been extended from 250 eV up to 400 eV. In the unresolved resonance region our results are compatible with one of the two incompatible capture data sets available below 2.5 keV. The data available in EXFOR and in the literature have been used to perform a simple analysis above 2.5 keV. Conclusions: The results of this measurement contribute to reduce the Am243(n,γ) cross section uncertainty and suggest that this cross section is underestimated up to 25% in the neutron energy range between 50 eV and a few keV in the present evaluated data libraries. Background: The design of new nuclear reactors and transmutation devices requires to reduce the present neutron cross section uncertainties of minor actinides. Purpose: Improvement of the Am243(n,γ) cross section uncertainty. Method: The Am243(n,γ) cross section has been measured at the n-TOF facility at CERN with a BaF2 total absorption calorimeter, in the energy range between 0.7 eV and 2.5 keV. Results: The Am243(n,γ) cross section has been successfully measured in the mentioned energy range. The resolved resonance region has been extended from 250 eV up to 400 eV. In the unresolved resonance region our results are compatible with one of the two incompatible capture data sets available below 2.5 keV. The data available in EXFOR and in the literature have been used to perform a simple analysis above 2.5 keV. Conclusions: The results of this measurement contribute to reduce the Am243(n,γ) cross section uncertainty and suggest that this cross section is underestimated up to 25% in the neutron energy range between 50 eV and a few keV in the present evaluated data libraries.

Published
2014

4. The (n,alpha) Reaction in the s-process Branching Point Ni-59

Author

C. Weiss, C. Guerrero, E. Griesmayer, J. Andrzejewski, G. Badurek, E. Chiaveri, R. Dressler, S. Ganesan, E. Jericha, F. Kaeppeler, P. Koehler, C. Lederer, H. Leeb, J. Marganiec, A. Pavlik, J. Perkowski, T. Rauscher, R. Reifarth, D. Schumann, G. Tagliente, V. Vlachoudis, S. Altstadt, L. Audouin, M. Barbagallo, V. Becares, F. Becvar, F. Belloni, E. Berthoumieux, J. Billowes, V. Boccone, D. Bosnar, M. Brugger, M. Calviani, F. Calvino, D. Cano Ott, C. Carrapico, F. Cerutti, M. Chin, N. Colonna, G. Cortes, M. A. Cortes Giraldo, M. Diakaki, C. Domingo Pardo, I. Duran, N. Dzysiuk, C. Eleftheriadis, A. Ferrari, K. Fraval, A. R. Garcia, G. Giubrone, M. B. Gomez Hornillos, I. F. Goncalves, E. Gonzalez Romero, F. Gunsing, P. Gurusamy, A. Hernandez Prieto, D. G. Jenkins, Y. Kadi, D. Karadimos, N. Kivel, M. Kokkoris, M. Krticka, J. Kroll, C. Lampoudis, C. Langer, E. Leal Cidoncha, L. S. Leong, R. Losito, A. M. Llick, A. Manousos, T. Martinez, P. F. Mastinu, M. Mastromarco, M. Meaze, E. Mendoza, A. Mengoni, P. M. Milazzo, M. Mirea, W. Mondalaers, C. Paradela, A. Plompen, J. Praena, J. M. Quesada, A. Riego, M. S. Robles, F. Roman, C. Rubbia, M. Sabate Gilarte, R. Sarmento, A. Saxena, P. Schillebeeckx, S. Schmidt, J. L. Tain, D. Tarrio, L. Tassan Got, A. Tsinganis, S. Valenta, V. Variale, P. Vaz, A. Ventura, R. Versaci, M. J. Vermeulen, R. Vlastou, A. Wallner, T. Ware, M. Weigand, T. Wright, P. Zugec, MASSIMI, CRISTIAN, MINGRONE, FEDERICA, VANNINI, GIANNI, C. Wei, C. Guerrero, E. Griesmayer, J. Andrzejewski, G. Badurek, E. Chiaveri, R. Dressler, S. Ganesan, E. Jericha, F. Kaeppeler, P. Koehler, C. Lederer, H. Leeb, J. Marganiec, A. Pavlik, J. Perkowski, T. Rauscher, R. Reifarth, D. Schumann, G. Tagliente, V. Vlachoudi, S. Altstadt, L. Audouin, M. Barbagallo, V. Becare, F. Becvar, F. Belloni, E. Berthoumieux, J. Billowe, V. Boccone, D. Bosnar, M. Brugger, M. Calviani, F. Calvino, D. Cano-Ott, C. Carrapico, F. Cerutti, M. Chin, N. Colonna, G. Corte, M. A. Cortes-Giraldo, M. Diakaki, C. Domingo-Pardo, I. Duran, N. Dzysiuk, C. Eleftheriadi, A. Ferrari, K. Fraval, A. R. Garcia, G. Giubrone, M. B. Gomez-Hornillo, I. F. Goncalve, E. Gonzalez-Romero, F. Gunsing, P. Gurusamy, A. Hernandez-Prieto, D. G. Jenkin, Y. Kadi, D. Karadimo, N. Kivel, M. Kokkori, M. Krticka, J. Kroll, C. Lampoudi, C. Langer, E. Leal-Cidoncha, L. S. Leong, R. Losito, A. M. Llick, A. Manouso, T. Martinez, C. Massimi, P. F. Mastinu, M. Mastromarco, M. Meaze, E. Mendoza, A. Mengoni, P. M. Milazzo, F. Mingrone, M. Mirea, W. Mondalaer, C. Paradela, A. Plompen, J. Praena, J. M. Quesada, A. Riego, M. S. Roble, F. Roman, C. Rubbia, M. Sabate-Gilarte, R. Sarmento, A. Saxena, P. Schillebeeckx, S. Schmidt, J. L. Tain, D. Tarrio, L. Tassan-Got, A. Tsingani, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, R. Versaci, M. J. Vermeulen, R. Vlastou, A. Wallner, T. Ware, M. Weigand, T. Wright, and P. Zugec

Subjects
(n, a) reaction cross section, diamond detector, NEUTRON TIME OF FLIGHT
Abstract

The (n, α) reaction in the radioactive 59Ni is of relevance in nuclear astrophysics as 59Ni can be considered as the first branching point in the astrophysical s-process. Its relevance in nuclear technology is especially related to material embrittlement in stainless steel. However, there is a discrepancy between available experimental data and the evaluated nuclear data files for this reaction. At the n_TOF facility at CERN, a dedicated system based on sCVD diamond diodes was set up to measure the 59Ni(n, α)56Fe cross section. The results of this measurement, with special emphasis on the dominant resonance at 203 eV, are presented here.

Published
2014

5. High-energy Neutron-induced Fission Cross Sections of Natural Lead and Bismuth-209

Author

D. Tarrio, L. Tassan-Got, L. Audouin, B. Berthier, L. Ferrant, S. Isaev, C. Le Naour, C. Stephan, D. Trubert, S. David, I. Duran, C. Paradela, H. Alvarez, U. Abbondanno, K. Fujii, P. M. Milazzo, C. Moreau, G. Aerts, F. Alvarez-Velarde, D. Cano-Ott, M. Embid-Segura, E. Gonzalez-Romero, C. Guerrero, T. Martinez, D. Villamarin, M. C. Vicente, S. Andriamonje, E. Berthoumieux, W. Dridi, F. Gunsig, J. Pancin, L. Perrot, A. Plukis, J. Andrzejewski, J. Marganiec, P. Assimakopoulos, D. Karadimos, D. Karamanis, C. Papachristodoulou, N. Patronis, G. Badurek, E. Jericha, H. Leeb, H. Oberhummer, M. T. Pigni, P. Baumann, M. Kerveno, S. Lukic, G. Rudolf, F. Becvar, M. Krticka, F. Calvino, G. Cortes, A. Poch, C. Pretel, M. Calviani, F. Gramegna, P. Mastinu, J. Praena, R. Capote, C. Carrapico, P. Cennini, E. Chiaveri, M. Dahlfors, A. Ferrari, I. Goncalves, A. Herrera-Martinez, Y. Kadi, L. Sarchiapone, V. Vlachoudis, V. Chepel, R. Ferreira-Marques, A. Lindote, I. Lopes, F. Neves, N. Colonna, G. Tagliente, R. Terlizzi, A. Couture, J. Cox, S. Marrone, S. O'brien, M. Wiescher, I. Dillmann, M. Heil, F. Kappeler, M. Mosconi, F. Voss, S. Walter, K. Wisshak, C. Domingo-Pardo, R. Plag, A. Plompen, J. L. Tain, C. Eleftheriadis, I. Savvidis, W. Furman, B. Haas, R. Haight, R. Reifarth, M. Igashira, P. Koehler, E. Kossionides, C. Lampoudis, M. Lozano, J. Quesada, C. Massimi, G. Vannini, A. Mengoni, M. Oshima, C. Papadopoulos, A. Pavlik, P. Pavlopoulos, R. Vlastou, T. Rauscher, C. Rubbia, P. Rullhusen, J. Salgado, C. Santos, L. Tavora, P. Vaz, A. Ventura, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Aval du cycle et Energie Nucléaire (ACEN), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département Recherches Subatomiques (DRS-IPHC), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Pôle Universitaire Léonard de Vinci, Pôle Universitaire Léonard de Vinci (PULV), nTOF, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Tarrno D., Tassan-Got L., Audouin L., Berthier B., Ferrant L., Isaev S., Naour C. Le, Stephan C., Trubert D., David S., Duran I., Paradela C., Alvarez H., Abbondanno U., Fujii K., Milazzo P. M., Moreau C., Aerts G., Alvarez-Velarde F., Cano-Ott D., Embid-Segura M., Gonzalez-Romero E., Guerrero C., Martinez T., Villamarin D., Vicente M. C., Andriamonje S., Berthoumieux E., Dridi W., Gunsig F., Pancin J., Perrot L., Plukis A., Andrzejewski J., Marganiec J., Assimakopoulos P., Karadimos D., Karamanis D., Papachristodoulou C., Patronis N., Badurek G., Jericha E., Leeb H., Oberhummer H., Pigni M. T., Baumann P., Kerveno M., Lukic S., Rudolf G., Becvar F., Krticka M., Calvino F., Cortes G., Poch A., Pretel C., Calviani M., Gramegna F., Mastinu P., Praena J., Capote R., Carrapico C., Cennini P., Chiaveri E., Dahlfors M., Ferrari A., Goncalves I., Herrera-Martinez A., Kadi Y., Sarchiapone L., Vlachoudis V., Chepel V., Ferreira-Marques R., Lindote A., Lopes I., Neves F., Colonna N., Tagliente G., Terlizzi R., Couture A., Cox J., Marrone S., Obrien S., Wiescher M., Dillmann I., Heil M., Kappeler F., Mosconi M., Voss F., Walter S., Wisshak K., Domingo-Pardo C., Plag R., Plompen A., Tain J. L., Eleftheriadis C., Savvidis I., Furman W., Haas B., Haight R., Reifarth R., Igashira M., Koehler P., Kossionides E., Lampoudis C., Lozano M., Quesada J., Massimi C., Vannini G., Mengoni A., Oshima M., Papadopoulos C., Pavlik A., Pavlopoulos P., Vlastou R., Rauscher T., Rubbia C., Rullhusen P., Salgado J., Santos C., Tavora L., Vaz P., and Ventura A.

Subjects
Pb-nat(n, Fission, Nuclear data, Nuclear Theory, General Physics and Astronomy, chemistry.chemical_element, f), Energies::Energia nuclear::Reactors nuclears de fissió [Àrees temàtiques de la UPC], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, Bismuth, Nuclear physics, Nuclear reactors, Reactors nuclears, Neutron, Spallation, Nuclear Experiment, EMERGING NUCLEAR TECHNOLOGIES, Neutron-induced ssion reactions, Energies::Energia nuclear [Àrees temàtiques de la UPC], Physics, Cluster decay, Nuclear energy, Bi-209(n, n TOF facility, TIME-OF-FLIGHT, chemistry, Spallation neutron source, Energia nuclear, Neutron source, PPAC fission detector, Spallation Neutron Source
Abstract

The CERN Neutron Time-Of-Flight (n-TOF) facility is well suited to measure small neutron-induced fission cross sections, as those of subactinides. The cross section ratios of {sup nat}Pb and {sup 209}Bi relative to {sup 235}U and {sup 238}U were measured using PPAC detectors. The fragment coincidence method allows to unambiguously identify the fission events. The present experiment provides the first results for neutron-induced fission up to 1 GeV for {sup nat}Pb and {sup 209}Bi. A good agreement with previous experimental data below 200 MeV is shown. The comparison with proton-induced fission indicates that the limiting regime where neutron-induced and proton-induced fission reach equal cross section is close to 1 GeV.

Published
2011

6. Resonance neutron-capture cross sections of stable magnesium isotopes and their astrophysical implications

Author

MASSIMI, CRISTIAN, VANNINI, GIANNI, P. Koehler, S. Bisterzo, N. Colonna, R. Gallino, F. Gunsing, F. Käppeler, G. Lorusso, A. Mengoni, M. Pignatari, U. Abbondanno, G. Aerts, H. Álvarez, F. Álvarez Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, M. Barbagallo, P. Baumann, F. Bečvář, F. Belloni, M. Bennett, E. Berthoumieux, M. Calviani, F. Calviño, D. Cano Ott, R. Capote, C. Carrapiço, A. Carrillo de Albornoz, P. Cennini, V. Chepel, E. Chiaveri, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillmann, R. Dolfini, C. Domingo Pardo, W. Dridi, I. Duran, C. Eleftheriadis, M. Embid Segura, L. Ferrant, A. Ferrari, R. Ferreira Marques, L. Fitzpatrick, H. Frais Koelbl, K. Fujii, W. Furman, I. Goncalves, E. González Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, C. Guerrero, B. Haas, R. Haight, M. Heil, A. Herrera Martinez, F. Herwig, R. Hirschi, M. Igashira, S. Isaev, E. Jericha, Y. Kadi, D. Karadimos, D. Karamanis, M. Kerveno, V. Ketlerov, V. Konovalov, S. Kopecky, E. Kossionides, M. Krtička, C. Lampoudis, H. Leeb, C. Lederer, A. Lindote, I. Lopes, R. Losito, M. Lozano, S. Lukic, J. Marganiec, L. Marques, S. Marrone, T. Martínez, P. Mastinu, E. Mendoza, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O’Brien, M. Oshima, J. Pancin, C. Papachristodoulou, C. Papadopoulos, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, G. Rockefeller, M. Rosetti, C. Rubbia, G. Rudolf, J. Salgado, C. Santos, L. Sarchiapone, R. Sarmento, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, D. Tarrío, L. Tassan Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, H. Wendler, M. Wiescher, K. Wisshak, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Département Recherches Subatomiques (DRS-IPHC), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Aval du cycle et Energie Nucléaire (ACEN), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Theorical Division (LANL), Los Alamos National Laboratory (LANL), Pôle Universitaire Léonard de Vinci, Pôle Universitaire Léonard de Vinci (PULV), C. Massimi, P. Koehler, S. Bisterzo, N. Colonna, R. Gallino, F. Gunsing, F. Käppeler, G. Lorusso, A. Mengoni, M. Pignatari, G. Vannini, U. Abbondanno, G. Aert, H. Álvarez, F. Álvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulo, L. Audouin, G. Badurek, M. Barbagallo, P. Baumann, F. Bečvář, F. Belloni, M. Bennett, E. Berthoumieux, M. Calviani, F. Calviño, D. Cano-Ott, R. Capote, C. Carrapiço, A. Carrillo de Albornoz, P. Cennini, V. Chepel, E. Chiaveri, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillmann, R. Dolfini, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadi, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marque, L. Fitzpatrick, H. Frais-Koelbl, K. Fujii, W. Furman, I. Goncalve, E. González-Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, C. Guerrero, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, F. Herwig, R. Hirschi, M. Igashira, S. Isaev, E. Jericha, Y. Kadi, D. Karadimo, D. Karamani, M. Kerveno, V. Ketlerov, V. Konovalov, S. Kopecky, E. Kossionide, M. Krtička, C. Lampoudi, H. Leeb, C. Lederer, A. Lindote, I. Lope, R. Losito, M. Lozano, S. Lukic, J. Marganiec, L. Marque, S. Marrone, T. Martínez, P. Mastinu, E. Mendoza, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O’Brien, M. Oshima, J. Pancin, C. Papachristodoulou, C. Papadopoulo, C. Paradela, N. Patroni, A. Pavlik, P. Pavlopoulo, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Pluki, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, G. Rockefeller, M. Rosetti, C. Rubbia, G. Rudolf, J. Salgado, C. Santo, L. Sarchiapone, R. Sarmento, I. Savvidi, C. Stephan, G. Tagliente, J. L. Tain, D. Tarrío, L. Tassan-Got, L. Tavora, R. Terlizzi, P. Vaz, A. Ventura, D. Villamarin, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, H. Wendler, M. Wiescher, K. Wisshak, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and TOF

Subjects
Nuclear and High Energy Physics, STELLAR CROSS SECTION, Astrophysics and Astronomy, Neutrons--Captura, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Neutrons--Capture, Nuclear physics, 0103 physical sciences, Neutron, Nuclear Physics - Experiment, 010306 general physics, Nuclear Experiment, Isotopes of magnesium, Physics, NUCLEAR ASTROPHYSICS, Energies::Energia nuclear [Àrees temàtiques de la UPC], Large Hadron Collider, Isotope, 010308 nuclear & particles physics, Nuclear energy, NEUTRON INDUCED NUCLEAR REACTION, Neutron spectroscopy, Neutron capture, 13. Climate action, S PROCESS, Energia nuclear, RESONANCE SPECTROSCOPY, Atomic physics, s-process, Shape analysis (digital geometry)
Abstract

We have measured the neutron capture cross sections of the stable magnesium isotopes 24,25,26Mg in the energy range of interest to the s process using the neutron time-of-flight facility n_TOF at CERN. Capture events from a natural metal sample and from samples enriched in 25Mg and 26Mg were recorded using the total energy method based on C6 2H6 detectors. Neutron resonance parameters were extracted by a simultaneous resonance shape analysis of the present capture data and existing transmission data on a natural isotopic sample. Maxwellian-averaged capture cross sections for the three isotopes were calculated up to thermal energies of 100 keV and their impact on s-process analyses was investigated. At 30 keV the new values of the stellar cross section for 24Mg, 25Mg, and 26Mg are 3.8±0.2 mb, 4.1±0.6 mb, and 0.14±0.01 mb, respectively.

Published
2012

7. Neutron-induced fission cross section of nat-Pb and 209-Bi from threshold to 1 GeV: An improved parametrization

Author

D. Tarrío, L. Tassan Got, L. Audouin, B. Berthier, I. Duran, L. Ferrant, S. Isaev, C. Le Naour, C. Paradela, C. Stephan, D. Trubert, U. Abbondanno, G. Aerts, H. Álvarez, F. Álvarez Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, G. Badurek, P. Baumann, F. Bečvář, E. Berthoumieux, F. Calviño, M. Calviani, D. Cano Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillmann, C. Domingo Pardo, W. Dridi, C. Eleftheriadis, M. Embid Segura, A. Ferrari, R. Ferreira Marques, K. Fujii, W. Furman, I. Goncalves, E. González Romero, F. Gramegna, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera Martinez, M. Igashira, E. Jericha, Y. Kadi, F. Käppeler, D. Karadimos, D. Karamanis, M. Kerveno, P. Koehler, E. Kossionides, M. Krtička, C. Lampoudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martínez, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O’Brien, M. Oshima, J. Pancin, C. Papachristodoulou, C. Papadopoulos, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santos, L. Sarchiapone, I. Savvidis, G. Tagliente, J. L. Tain, L. Tavora, R. Terlizzi, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, M. Wiescher, K. Wisshak, MASSIMI, CRISTIAN, VANNINI, GIANNI, D. Tarrío, L. Tassan-Got, L. Audouin, B. Berthier, I. Duran, L. Ferrant, S. Isaev, C. Le Naour, C. Paradela, C. Stephan, D. Trubert, U. Abbondanno, G. Aert, H. Álvarez, F. Álvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulo, G. Badurek, P. Baumann, F. Bečvář, E. Berthoumieux, F. Calviño, M. Calviani, D. Cano-Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillmann, C. Domingo-Pardo, W. Dridi, C. Eleftheriadi, M. Embid-Segura, A. Ferrari, R. Ferreira-Marque, K. Fujii, W. Furman, I. Goncalve, E. González-Romero, F. Gramegna, C. Guerrero, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, E. Jericha, Y. Kadi, F. Käppeler, D. Karadimo, D. Karamani, M. Kerveno, P. Koehler, E. Kossionide, M. Krtička, C. Lampoudi, H. Leeb, A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martínez, C. Massimi, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O’Brien, M. Oshima, J. Pancin, C. Papachristodoulou, C. Papadopoulo, N. Patroni, A. Pavlik, P. Pavlopoulo, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Pluki, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santo, L. Sarchiapone, I. Savvidi, G. Tagliente, J. L. Tain, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, M. Wiescher, and K. Wisshak.

Subjects
Physics::Instrumentation and Detectors, NEUTRON-INDUCED REACTION, Nuclear Theory, Nuclear Experiment, FISSION
Abstract

Neutron-induced fission cross sections for natPb and 209Bi were measured with a white-spectrum neutron source at the CERN Neutron Time-of-Flight (n_TOF) facility. The experiment, using neutrons from threshold up to 1 GeV, provides the first results for these nuclei above 200 MeV. The cross sections were measured relative to 235U and 238U in a dedicated fission chamber with parallel plate avalanche counter detectors. Results are compared with previous experimental data. Upgraded parametrizations of the cross sections are presented, from threshold energy up to 1 GeV. The proposed new sets of fitting parameters improve former results along the whole energy range.

Published
2011

8. 197-Au(n,gamma) cross section in the uresolved resonance region

Author

C. Lederer, N. Colonna, C. Domingo Pardo, F. Gunsing, F. Käppeler, A. Mengoni, A. Wallner, U. Abbondanno, G. Aerts, H. Álvarez, F. Álvarez Velarde, S. Andriamonje, J. Andrzejewski, L. Audouin, P. Assimakopoulos, G. Badurek, P. Baumann, F. Bečvář, F. Belloni, E. Berthoumieux, F. Calviño, M. Calviani, D. Cano Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillmann, W. Dridi, I. Duran, C. Eleftheriadis, L. Ferrant, A. Ferrari, R. Ferreira Marques, K. Fujii, W. Furman, S. Galanopoulos, I. F. Gonçalves, E. González Romero, F. Gramegna, C. Guerrero, B. Haas, R. Haight, M. Heil, A. Herrera Martinez, M. Igashira, E. Jericha, Y. Kadi, D. Karadimos, D. Karamanis, M. Kerveno, P. Koehler, E. Kossionides, M. Krtička, C. Lampoudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martínez, P. Mastinu, E. Mendoza, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O’Brien, J. Pancin, C. Papadopoulos, C. Paradela, A. Pavlik, P. Pavlopoulos, G. Perdikakis, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, L. Sarchiapone, R. Sarmento, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan Got, L. Tavora, R. Terlizzi, P. Vaz, A. Ventura, D. Villamarin, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, M. Wiescher, K. Wisshak, MASSIMI, CRISTIAN, VANNINI, GIANNI, C. Lederer, N. Colonna, C. Domingo-Pardo, F. Gunsing, F. Käppeler, C.Massimi, A. Mengoni, A. Wallner, U. Abbondanno, G. Aert, H. Álvarez, F. Álvarez-Velarde, S. Andriamonje, J. Andrzejewski, L. Audouin, P. Assimakopoulo, G. Badurek, P. Baumann, F. Bečvář, F. Belloni, E. Berthoumieux, F. Calviño, M. Calviani, D. Cano-Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillmann, W. Dridi, I. Duran, C. Eleftheriadi, L. Ferrant, †, A. Ferrari, R. Ferreira-Marque, K. Fujii, W. Furman, S. Galanopoulo, I. F. Gonçalve, E. González-Romero, F. Gramegna, C. Guerrero, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, E. Jericha, Y. Kadi, D. Karadimo, D. Karamani, M. Kerveno, P. Koehler, E. Kossionide, M. Krtička, C. Lampoudi, H. Leeb, A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martínez, P. Mastinu, E. Mendoza, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O’Brien, J. Pancin, C. Papadopoulo, C. Paradela, A. Pavlik, P. Pavlopoulo, G. Perdikaki, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Pluki, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, L. Sarchiapone, R. Sarmento, I. Savvidi, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, M. Wiescher, and K. Wisshak.

Subjects
NEUTRON-INDUCED REACTION, NEUTRON CAPTURE
Abstract

The cross section of the reaction 197Au(n,γ) was measured with the time-of-flight technique at the n_TOF (neutron time-of-flight) facility in the unresolved resonance region between 5 and 400 keV using a pair of C6D6 (where D denotes 2H) liquid scintillators for the detection of prompt capture γ rays. The results with a total uncertainty of 3.9%–6.7% for a resolution of 20 bins per energy decade show fair agreement with the Evaluated Nuclear Data File Version B-VII.0 (ENDF/B-VII.0), which contains the standard evaluation. The Maxwellian-averaged cross section (MACS) at 30 keV is in excellent agreement with the one according to the ENDF/B-VII.0 evaluation and 4.7% higher than the MACS measured independently by activation technique. Structures in the cross section, which had also been reported earlier, have been interpreted as being due to clusters of resonances.

Published
2011

9. Neutron-induced fission cross-sectionof 233-U in the energy range 0.5<20 MeV

Author

The n_TOF Collaboration, F. Belloni, M. Calviani, N. Colonna, P. Mastinu, P. M. Milazzo, U. Abbondanno, G. Aerts, H. Álvarez, F. Alvarez Velarde, S. Andriamonje, J. Andrzejewski, L. Audouin, G. Badurek, P. Baumann, F. Bečvář, E. Berthoumieux, F. Calviño, D. Cano Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillmann, C. Domingo Pardo, W. Dridi, I. Duran, C. Eleftheriadis, M. Embid Segura, A. Ferrari, R. Ferreira Marques, K. Fujii, W. Furman, I. Goncalves, E. Gonzalez Romero, A. Goverdovski, F. Gramegna, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera Martinez, M. Igashira, E. Jericha, F. Käppeler, Y. Kadi, D. Karadimos, D. Karamanis, M. Kerveno, P. Koehler, E. Kossionides, M. Krtička, C. Lamboudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martınez, MASSIMI, CRISTIAN, M. H. Meaze, A. Mengoni, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O’Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulos, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santos, L. Sarchiapone, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan Got, L. Tavora, R. Terlizzi, VANNINI, GIANNI, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, M. Wiescher, K. Wisshak, The n_TOF Collaboration, F. Belloni, M. Calviani, N. Colonna, P. Mastinu, P. M. Milazzo, U. Abbondanno, G. Aert, H. Álvarez, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, L. Audouin, G. Badurek, P. Baumann, F. Bečvář, E. Berthoumieux, F. Calviño, D. Cano-Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillmann, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadi, M. Embid-Segura, A. Ferrari, R. Ferreira-Marque, K. Fujii, W. Furman, I. Goncalve, E. Gonzalez-Romero, A. Goverdovski, F. Gramegna, C. Guerrero, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, E. Jericha, F. Käppeler, Y. Kadi, D. Karadimo, D. Karamani, M. Kerveno, P. Koehler, E. Kossionide, M. Krtička, C. Lamboudi, H. Leeb, A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martınez, C. Massimi, M. H. Meaze, A. Mengoni, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O’Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulo, C. Paradela, N. Patroni, A. Pavlik, P. Pavlopoulo, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Pluki, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santo, L. Sarchiapone, I. Savvidi, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, M. Wiescher, and K. Wisshak

Subjects
NEUTRON-INDUCED REACTION, Nuclear Experiment, FISSION
Abstract

The neutron-induced fission cross-section of 233U has been measured at the CERN n_TOF facility relative to the standard fission cross-section of 235U between 0.5 and 20MeV. The experiment was performed with a fast ionization chamber for the detection of the fission fragments and to discriminate against α -particles from the natural radioactivity of the samples. The high instantaneous flux and the low background of the n_TOF facility result in data with uncertainties of ≈ 3% , which were found in good agreement with previous experiments. The high quality of the present results allows to improve the evaluation of the 233U (n,f) cross-section and, consequently, the design of energy systems based on the Th/U cycle.

Published
2011

10. Neutron-induced fission cross section of 234U and 237Np measured at the CERN Neutron Time-of-Flight (n TOF) facility

Author

C. Paradela, L. Tassan Got, L. Audouin, B. Berthier, I. Duran, L. Ferrant, S. Isaev, C. Le Naour, C. Stephan, D. Tarrío, D. Trubert, U. Abbondanno, G. Aerts, H. Álvarez, F. Álvarez Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, G. Badurek, P. Baumann, F. Bečvář, E. Berthoumieux, F. Calviño, M. Calviani, D. Cano Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillmann, C. Domingo Pardo, W. Dridi, C. Eleftheriadis, M. Embid Segura, A. Ferrari, R. Ferreira Marques, K. Fujii, W. Furman, I. Goncalves, E. González Romero, F. Gramegna, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera Martinez, M. Igashira, E. Jericha, Y. Kadi, F. Käppeler, D. Karadimos, D. Karamanis, M. Kerveno, P. Koehler, E. Kossionides, M. Krtička, C. Lampoudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martínez, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O’Brien, M. Oshima, J. Pancin, C. Papachristodoulou, C. Papadopoulos, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santos, L. Sarchiapone, I. Savvidis, G. Tagliente, J. L. Tain, L. Tavora, R. Terlizzi, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, M. Wiescher, K. Wisshak, MASSIMI, CRISTIAN, VANNINI, GIANNI, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), nTOF, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), C. Paradela, L. Tassan-Got, L. Audouin, B. Berthier, I. Duran, L. Ferrant, S. Isaev, C. Le Naour, C. Stephan, D. Tarrío, D. Trubert, U. Abbondanno, G. Aert, H. Álvarez, F. Álvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulo, G. Badurek, P. Baumann, F. Bečvář, E. Berthoumieux, F. Calviño, M. Calviani, D. Cano-Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillmann, C. Domingo-Pardo, W. Dridi, C. Eleftheriadi, M. Embid-Segura, A. Ferrari, R. Ferreira-Marque, K. Fujii, W. Furman, I. Goncalve, E. González-Romero, F. Gramegna, C. Guerrero, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, E. Jericha, Y. Kadi, F. Käppeler, D. Karadimo, D. Karamani, M. Kerveno, P. Koehler, E. Kossionide, M. Krtička, C. Lampoudi, H. Leeb, A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martínez, C. Massimi, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O’Brien, M. Oshima, J. Pancin, C. Papachristodoulou, C. Papadopoulo, N. Patroni, A. Pavlik, P. Pavlopoulo, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Pluki, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santo, L. Sarchiapone, I. Savvidi, G. Tagliente, J. L. Tain, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, M. Wiescher, and K. Wisshak

Subjects
NEUTRON-INDUCED REACTIONS, NUCLEAR PHYSICS, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, NUCLEAR FISSION, 25.85.Ec, 28.65.+a, 28.41.Kw, 28.41.Vx
Abstract

A high-resolution measurement of the neutron-induced fission cross section of 234U and 237Np has been performed at the CERN Neutron Time-of-Flight facility. The cross sections have been determined in a wide energy range from 1 eV to 1 GeV using the evaluated 235U cross section as reference. In these measurements the energy determination for the 234U resonances could be improved, whereas previous discrepancies for the 237Np resonances were confirmed. New cross-section data are provided for high neutron energies that go beyond the limits of prior evaluations, obtaining important differences in the case of 237Np.

Published
2010

11. Neutron physics of the Re/Os clock. I. Measurements of the (n,gamma) cross sections of the 186,187,188-Os at the CERN n_TOF facility

Author

M. MOSCONI, K. FUJII, A. MENGONI, C. DOMINGO PARDO, F. KAPPELER, U. ABBONDANNO, G. AERTS, H. ALVAREZ, F. ALVAREZ VELARDE, S. ANDRIAMONJE, J. ANDRZEJEWSKI, P. ASSIMAKOPOULOS, L. AUDOUIN, G. BADUREK, P. BAUMANN, F. BECVAR, E. BERTHOUMIEUX, F. CALVINO, M. CALVIANI, D. CANO OTT, R. CAPOTE, C. CARRAPICO, P. CENNINI, V. CHEPEL, E. CHIAVERI, N. COLONNA, G. CORTES, A. COUTURE, J. COX, M. DAHLFORS, S. DAVID, I. DILLMANN, W. DRIDI, I. DURAN, C. ELEFTHERIADIS, L. FERRANT, A. FERRARI, R. FERREIRA MARQUES, L. FITZPATRICK, H. FRAIS KOELBL, W. FURMAN, R. GALLINO, I. GONCALVES, E. GONZALEZ ROMERO, A. GOVERDOVSKI, F. GRAMEGNA, E. GRIESMAYER, C. GUERRERO, F. GUNSING, B. HAAS, R. HAIGHT, M. HEIL, A. HERRERA MARTINEZ, M. IGASHIRA, E. JERICHA, Y. KADI, D. KARADIMOS, M. KERVENO, P. KOEHLER, E. KOSSIONIDES, M. KRTICKA, C. LAMPOUDIS, H. LEEB, A. LINDOTE, I. LOPES, M. LOZANO, S. LUKIC, J. MARGANIEC, S. MARRONE, T. MARTINEZ, P. MASTINU, E. MENDOZA, P. M. MILAZZO, C. MOREAU, F. NEVES, H. OBERHUMMER, S. O'BRIEN, J. PANCIN, C. PAPACHRISTODOULOU, C. PAPADOPOULOS, C. PARADELA, N. PATRONIS, A. PAVLIK, P. PAVLOPOULOS, L. PERROT, M. T. PIGNI, R. PLAG, A. PLOMPEN, A. PLUKIS, A. POCH, J. PRAENA, C. PRETEL, J. QUESADA, T. RAUSCHER, R. REIFARTH, C. RUBBIA, G. RUDOLF, P. RULLHUSEN, J. SALGADO, C. SANTOS, L. SARCHIAPONE, I. SAVVIDIS, C. STEPHAN, G. TAGLIENTE, J. L. TAIN, L. TASSAN GOT, L. TAVORA, R. TERLIZZI, P. VAZ, A. VENTURA, D. VILLAMARIN, M. C. VICENTE, V. VLACHOUDIS, R. VLASTOU, F. VOSS, S. WALTER, M. WIESCHER, K. WISSHAK, MASSIMI, CRISTIAN, VANNINI, GIANNI, M. MOSCONI, K. FUJII, A. MENGONI, C. DOMINGO-PARDO, F. KAPPELER, U. ABBONDANNO, G. AERTS, H. ALVAREZ, F. ALVAREZ-VELARDE, S. ANDRIAMONJE, J. ANDRZEJEWSKI, P. ASSIMAKOPOULOS, L. AUDOUIN, G. BADUREK, P. BAUMANN, F. BECVAR, E. BERTHOUMIEUX, F. CALVINO, M. CALVIANI, D. CANO-OTT, R. CAPOTE, C. CARRAPICO, P. CENNINI, V. CHEPEL, E. CHIAVERI, N. COLONNA, G. CORTES, A. COUTURE, J. COX, M. DAHLFORS, S. DAVID, I. DILLMANN, W. DRIDI, I. DURAN, C. ELEFTHERIADIS, L. FERRANT, A. FERRARI, R. FERREIRA-MARQUES, L. FITZPATRICK, H. FRAIS-KOELBL, W. FURMAN, R.GALLINO, I. GONCALVES, E. GONZALEZ-ROMERO, A. GOVERDOVSKI, F. GRAMEGNA, E. GRIESMAYER, C. GUERRERO, F. GUNSING, B. HAAS, R. HAIGHT, M. HEIL, A. HERRERA-MARTINEZ, M. IGASHIRA, E. JERICHA, Y. KADI, D. KARADIMOS, M. KERVENO, P. KOEHLER, E. KOSSIONIDES, M. KRTICKA, C. LAMPOUDIS, H. LEEB, A. LINDOTE, I. LOPES, M. LOZANO, S. LUKIC, J. MARGANIEC, S. MARRONE, T. MARTINEZ, C. MASSIMI, P. MASTINU, E. MENDOZA, P.M. MILAZZO, C. MOREAU, F. NEVES, H. OBERHUMMER, S. O'BRIEN, J. PANCIN, C. PAPACHRISTODOULOU, C. PAPADOPOULOS, C. PARADELA, N. PATRONIS, A. PAVLIK, P. PAVLOPOULOS, L. PERROT, M.T. PIGNI, R. PLAG, A. PLOMPEN, A. PLUKIS, A. POCH, J. PRAENA, C. PRETEL, J. QUESADA, T. RAUSCHER, R. REIFARTH, C. RUBBIA, G. RUDOLF, P. RULLHUSEN, J. SALGADO, C. SANTOS, L. SARCHIAPONE, I. SAVVIDIS, C. STEPHAN, G. TAGLIENTE, J.L. TAIN, L. TASSAN-GOT, L. TAVORA, R. TERLIZZI, VANNINI G., P. VAZ, A. VENTURA, D. VILLAMARIN, M.C. VICENTE, V. VLACHOUDIS, R. VLASTOU, F. VOSS, S. WALTER, M. WIESCHER, and K. WISSHAK

Subjects
AGE OF THE UNIVERSE, NEUTRON CAPTURE CROSS SECTIONS, NEUTRON PHYSICS, COSMOCHRONOMETER
Abstract

The precise determination of the neutron capture cross sections of Os186 and Os187 is important to define the s-process abundance of Os187 at the formation of the solar system. This quantity can be used to evaluate the radiogenic component of the abundance of Os187 due to the decay of the unstable Re187 (t1/2=41.2 Gyr) and from this to infer the time duration of the nucleosynthesis in our galaxy (Re/Os cosmochronometer). The neutron capture cross sections of Os186, Os187, and Os188 have been measured at the CERN n-TOF facility from 1 eV to 1 MeV, covering the entire energy range of astrophysical interest. The measurement has been performed by time-of-flight technique using isotopically enriched samples and two C6D6 scintillation detectors for recording the prompt γ rays emitted in the capture events. Maxwellian averaged capture cross sections have been determined for thermal energies between kT=5 and 100 keV corresponding to all possible s-process scenarios. The estimated uncertainties for the values at 30 keV are 4.1, 3.3, and 4.7% for Os186, Os187, and Os188, respectively. © 2010 The American Physical Society

Published
2010

12. Astrophysics at n-TOF facility

Author

G. Tagliente, U. Abbondanno, G. Aerts, H. Alvarez, F. Alvarez Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Bečvář, F. Belloni, E. Berthoumieux, F. Calviño, M. Calviani, D. Cano Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillman, C. Domingo Pardo, W. Dridi, I. Duran, C. Eleftheriadis, M. Embid Segura, L. Ferrant, A. Ferrari, R. Ferreira Marques, K. Fujii, W. Furman, I. Goncalves, E. Gonzalez Romero, F. Gramegna, C. Guerrero, F. Gunsing, M. Heil, A. Herrera Martinez, E. Jericha, F. Käppeler, Y. Kadi, D. Karadimos, D. Karamanis, M. Kerveno, E. Kossionides, M. Krtička, C. Lamboudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martinez, P. Mastinu, A. Mengoni, P. M. Milazzo, M. Mosconi, F. Neves, H. Oberhummer, S. O’Brien, J. Pancin, C. Papachristodoulou, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, R. Plag, A. Plukis, A. Poch, J. Praena, C. Pretel, J. Quesada, R. Reifarth, C. Rubbia, G. Rudolf, J. Salgado, C. Santos, L. Sarchiapone, I. Savvidis, C. Stephan, J. L. Tain, L. Tassan Got, L. Tavora, R. Terlizzi, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, M. Wiescher, K. Wisshak, Ricardo Alarcon, Phil Cole, Andres J. Kreiner, Hugo F. Arellano, MASSIMI, CRISTIAN, VANNINI, GIANNI, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, European Commission (EC), Ricardo Alarcon , Phil Cole , Andres J. Kreiner and Hugo F. Arellano, G. Tagliente, U. Abbondanno, G. Aert, H. Alvarez, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulo, L. Audouin, G. Badurek, P. Baumann, F. Bečvář, F. Belloni, E. Berthoumieux, F. Calviño, M. Calviani, D. Cano-Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillman, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadi, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marque, K. Fujii, W. Furman, I. Goncalve, E. Gonzalez-Romero, F. Gramegna, C. Guerrero, F. Gunsing, M. Heil, A. Herrera-Martinez, E. Jericha, F. Käppeler, Y. Kadi, D. Karadimo, D. Karamani, M. Kerveno, E. Kossionide, M. Krtička, C. Lamboudi, H. Leeb, A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martinez, C. Massimi, P. Mastinu, A. Mengoni, P. M. Milazzo, M. Mosconi, F. Neve, H. Oberhummer, S. O’Brien, J. Pancin, C. Papachristodoulou, C. Paradela, N. Patroni, A. Pavlik, P. Pavlopoulo, L. Perrot, R. Plag, A. Pluki, A. Poch, J. Praena, C. Pretel, J. Quesada, R. Reifarth, C. Rubbia, G. Rudolf, J. Salgado, C. Santo, L. Sarchiapone, I. Savvidi, C. Stephan, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, M. Wiescher, K. Wisshak, Ricardo Alarcon, Phil Cole, Andres J. Kreiner, and Hugo F. Arellano

Subjects
Physics, Neutron cross-section, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Astrophysics, Neutron scattering, Neutron temperature, Nuclear physics, Neutron capture, Elemental Nucleosynthesi, N_TOF, Nuclear astrophysics, Neutron cross section, r-process, Neutron, n_TOF CERN, s-process, Nuclear Experiment, s process
Abstract

Heavy elements with Z ≥ 30 are made by neutron capture reactions during stellar He burning and presumably in supernovae. This contribution deals mainly with the slow neutron capture (s) process which is responsible for about one half of the abundances in the mass region between Fe and Bi. The slow time scale implies that the reaction path of this process involves mostly stable isotopes which can be studied in detail in laboratory experiments. The neutron time of flight (n_TOF) facility at CERN is a neutron spallation source, its white neutron energy spectrum ranges from thermal to several MeV, covering the full energy range of interest for nuclear astrophysics, in particular for measurements of the neutron capture cross section required in s-process nucleosynthesis. This contribution gives an overview on the astrophysical program made at n_TOF facility, the results and the implications will be considered. European Commission (EC) FIKW-CT-2000-00107

Published
2010

13. Study of Neutron-Induced Fission Cross Sections of U, Am, and Cm at ṉTOF

Author

P. M. Milazzo, U. Abbondanno, G. Aerts, H. Alvarez, F. Alvarez Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Becčvář, F. Belloni, E. Berthoumieux, F. Calviño, M. Calviani, D. Cano Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillman, C. Domingo Pardo, W. Dridi, I. Duran, C. Eleftheriadis, M. Embid Segura, L. Ferrant, A. Ferrari, R. Ferreira Marques, K. Fujii, W. Furman, I. Goncalves, E. Gonzalez Romero, F. Gramegna, C. Guerrero, F. Gunsing, M. Heil, A. Herrera Martinez, E. Jericha, F. Käppeler, Y. Kadi, D. Karadimos, D. Karamanis, M. Kerveno, P. Koehler, E. Kossionides, M. Krtička, C. Lamboudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martinez, P. Mastinu, A. Mengoni, M. Mosconi, F. Neves, H. Oberhummer, S. O’Brien, J. Pancin, C. Papachristodoulou, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, R. Plag, A. Plukis, A. Poch, J. Praena, C. Pretel, J. Quesada, R. Reifarth, C. Rubbia, G. Rudolf, J. Salgado, C. Santos, L. Sarchiapone, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan Got, L. Tavora, R. Terlizzi, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, M. Wiescher, K. Wisshak, Ricardo Alarcon, Phil Cole, Andres J. Kreiner, Hugo F. Arellano, MASSIMI, CRISTIAN, VANNINI, GIANNI, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, European Commission Joint Research Centre European Community (EC), Ricardo Alarcon , Phil Cole , Andres J. Kreiner and Hugo F. Arellano, P. M. Milazzo, U. Abbondanno, G. Aert, H. Alvarez, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulo, L. Audouin, G. Badurek, P. Baumann, F. Becčvář, F. Belloni, E. Berthoumieux, F. Calviño, M. Calviani, D. Cano-Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillman, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadi, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marque, K. Fujii, W. Furman, I. Goncalve, E. Gonzalez-Romero, F. Gramegna, C. Guerrero, F. Gunsing, M. Heil, A. Herrera-Martinez, E. Jericha, F. Käppeler, Y. Kadi, D. Karadimo, D. Karamani, M. Kerveno, P. Koehler, E. Kossionide, M. Krtička, C. Lamboudi, H. Leeb, A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martinez, C. Massimi, P. Mastinu, A. Mengoni, M. Mosconi, F. Neve, H. Oberhummer, S. O’Brien, J. Pancin, C. Papachristodoulou, C. Paradela, N. Patroni, A. Pavlik, P. Pavlopoulo, L. Perrot, R. Plag, A. Pluki, A. Poch, J. Praena, C. Pretel, J. Quesada, R. Reifarth, C. Rubbia, G. Rudolf, J. Salgado, C. Santo, L. Sarchiapone, I. Savvidi, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, M. Wiescher, K. Wisshak, Ricardo Alarcon, Phil Cole, Andres J. Kreiner, and Hugo F. Arellano

Subjects
Nuclear reaction, Isotopes of uranium, Isotope, Chemistry, Fission, Nuclear Theory, Radiochemistry, Alpha particle, NEUTRON INDUCED REACTIONS, Neutron cross section, Nuclear physics, Neutron-induced fission reactions, N_TOF, Uranium-233, Physics::Accelerator Physics, Neutron, Spallation, Nuclear Experiment, TIME-OF-Flight
Abstract

Neutron induced fission cross sections of several isotopes have been measured at the CERN n_TOF spallation neutron facility. Between them some measurements involve isotopes (233U, 241Am, 243Am, 245Cm) relevant for applications to nuclear technologies. The n_TOF facility delivers neutrons with high instantaneous flux and in a wide energy range, from thermal up to 250 MeV. The experimental apparatus consists of an ionization chamber that discriminates fission fragments and α particles coming from natural radioactivity of the samples. All the measurements were performed referring to the standard cross section of 235U. European Commission Joint Research Centre European Community (EC) FIKW-CT-2000-00107

Published
2010

14. 197-Au(n,gamma) cross section in the resonance region

Author

MASSIMI, CRISTIAN, C. Domingo Pardo, VANNINI, GIANNI, L. Audouin, C. Guerrero, U. Abbondanno, G. Aerts, H. Álvarez, F. Álvarez Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, G. Badurek, P. Baumann, F. Bečvář, F. Belloni, E. Berthoumieux, F. Calviño, M. Calviani, D. Cano Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillmann, W. Dridi, I. Duran, C. Eleftheriadis, L. Ferrant, A. Ferrari, R. Ferreira Marques, K. Fujii, W. Furman, S. Galanopoulos, I. F. Gonçalves, E. González Romero, F. Gramegna, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera Martinez, M. Igashira, E. Jericha, F. Käppeler, Y. Kadi, D. Karadimos, D. Karamanis, M. Kerveno, P. Koehler, E. Kossionides, M. Krtička, C. Lampoudis, C. Lederer, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martínez, P. Mastinu, E. Mendoza, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O’Brien, J. Pancin, C. Papadopoulos, C. Paradela, A. Pavlik, P. Pavlopoulos, G. Perdikakis, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, L. Sarchiapone, R. Sarmento, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan Got, L. Tavora, R. Terlizzi, P. Vaz, A. Ventura, D. Villamarin, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, M. Wiescher, K. Wisshak, C.Massimi, C. Domingo-Pardo, G. Vannini, L. Audouin, C. Guerrero, U. Abbondanno, G. Aert, H. Álvarez, F. Álvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulo, G. Badurek, P. Baumann, F. Bečvář, F. Belloni, E. Berthoumieux, F. Calviño, M. Calviani, D. Cano-Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillmann, W. Dridi, I. Duran, C. Eleftheriadi, L. Ferrant, †, A. Ferrari, R. Ferreira-Marque, K. Fujii, W. Furman, S. Galanopoulo, I. F. Gonçalve, E. González-Romero, F. Gramegna, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, E. Jericha, F. Käppeler, Y. Kadi, D. Karadimo, D. Karamani, M. Kerveno, P. Koehler, E. Kossionide, M. Krtička, C. Lampoudi, C. Lederer, H. Leeb, A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martínez, P. Mastinu, E. Mendoza, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O’Brien, J. Pancin, C. Papadopoulo, C. Paradela, A. Pavlik, P. Pavlopoulo, G. Perdikaki, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Pluki, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, L. Sarchiapone, R. Sarmento, I. Savvidi, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, P. Vaz, A. Ventura, D. Villamarin, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, M. Wiescher, and K. Wisshak

Subjects
NEUTRON CAPTURE
Abstract

The (n,γ) cross section of Au197 has been measured at n_TOF in the resolved resonance region, up to 5 keV, with the aim of improving the accuracy in an energy range where it is not yet considered standard. The measurements were performed with two different experimental setup and detection techniques, the total energy method based on C6D6 detectors, and the total absorption calorimetry based on a 4π BaF2 array. By comparing the data collected with the two techniques, two accurate sets of neutron-capture yields have been obtained, which could be the basis for a new evaluation leading to an extended cross-section standard. Overall good agreement is found between the n_TOF results and evaluated cross sections, with some significant exceptions for small resonances. A few resonances not included in the existing databases have also been observed.

Published
2010

15. Neutron physics of the Re/Os clock. III. Resonance analyses and stellar (n,γ) cross sections of 186,187,188Os

Author

K. FUJII, M. MOSCONI, A. MENGONI, C. DOMINGO PARDO, F. KAPPELER, U. ABBONDANNO, G. AERTS, H. ALVAREZ, F. ALVAREZ VELARDE, S. ANDRIAMONJE, J. ANDRZEJEWSKI, P. ASSIMAKOPOULOS, L. AUDOUIN, G. BADUREK, P. BAUMANN, F. BECVAR, E. BERTHOUMIEUX, F. CALVINO, M. CALVIANI, D. CANO OTT, R. CAPOTE, C. CARRAPICO, P. CENNINI, V. CHEPEL, E. CHIAVERI, N. COLONNA, G. CORTES, A. COUTURE, J. COX, M. DAHLFORS, S. DAVID, I. DILLMANN, W. DRIDI, I. DURAN, C. ELEFTHERIADIS, L. FERRANT, A. FERRARI, R. FERREIRA MARQUES, L. FITZPATRICK, H. FRAIS KOELBL, W. FURMAN, R. GALLINO, I. GONCALVES, E. GONZALEZ ROMERO, A. GOVERDOVSKI, F. GRAMEGNA, E. GRIESMAYER, C. GUERRERO, F. GUNSING, B. HAAS, R. HAIGHT, M. HEIL, A. HERRERA MARTINEZ, M. IGASHIRA, E. JERICHA, Y. KADI, D. KARADIMOS, M. KERVENO, P. KOEHLER, E. KOSSIONIDES, M. KRTICKA, C. LAMPOUDIS, H. LEEB, A. LINDOTE, I. LOPES, M. LOZANO, S. LUKIC, J. MARGANIEC, S. MARRONE, T. MARTINEZ, P. MASTINU, E. MENDOZA, P. M. MILAZZO, C. MOREAU, F. NEVES, H. OBERHUMMER, S. O'BRIEN, J. PANCIN, C. PAPACHRISTODOULOU, C. PAPADOPOULOS, C. PARADELA, N. PATRONIS, A. PAVLIK, P. PAVLOPOULOS, L. PERROT, M. T. PIGNI, R. PLAG, A. PLOMPEN, A. PLUKIS, A. POCH, J. PRAENA, C. PRETEL, J. QUESADA, T. RAUSCHER, R. REIFARTH, C. RUBBIA, G. RUDOLF, P. RULLHUSEN, J. SALGADO, C. SANTOS, L. SARCHIAPONE, I. SAVVIDIS, C. STEPHAN, G. TAGLIENTE, J. L. TAIN, L. TASSAN GOT, L. TAVORA, R. TERLIZZI, P. VAZ, A. VENTURA, D. VILLAMARIN, M. C. VICENTE, V. VLACHOUDIS, R. VLASTOU, F. VOSS, S. WALTER, M. WIESCHER, K. WISSHAK, MASSIMI, CRISTIAN, VANNINI, GIANNI, K. FUJII, M. MOSCONI, A. MENGONI, C. DOMINGO-PARDO, F. KAPPELER, U. ABBONDANNO, G. AERTS, H. ALVAREZ, F. ALVAREZ-VELARDE, S. ANDRIAMONJE, J. ANDRZEJEWSKI, P. ASSIMAKOPOULOS, L. AUDOUIN, G. BADUREK, P. BAUMANN, F. BECVAR, E. BERTHOUMIEUX, F. CALVINO, M. CALVIANI, D. CANO-OTT, R. CAPOTE, C. CARRAPICO, P. CENNINI, V. CHEPEL, E. CHIAVERI, N. COLONNA, G. CORTES, A. COUTURE, J. COX, M. DAHLFORS, S. DAVID, I. DILLMANN, W. DRIDI, I. DURAN, C. ELEFTHERIADIS, L. FERRANT, A. FERRARI, R. FERREIRA-MARQUES, L. FITZPATRICK, H. FRAIS-KOELBL, W. FURMAN, R.GALLINO, I. GONCALVES, E. GONZALEZ-ROMERO, A. GOVERDOVSKI, F. GRAMEGNA, E. GRIESMAYER, C. GUERRERO, F. GUNSING, B. HAAS, R. HAIGHT, M. HEIL, A. HERRERA-MARTINEZ, M. IGASHIRA, E. JERICHA, Y. KADI, D. KARADIMOS, M. KERVENO, P. KOEHLER, E. KOSSIONIDES, M. KRTICKA, C. LAMPOUDIS, H. LEEB, A. LINDOTE, I. LOPES, M. LOZANO, S. LUKIC, J. MARGANIEC, S. MARRONE, T. MARTINEZ, C. MASSIMI, P. MASTINU, E. MENDOZA, P.M. MILAZZO, C. MOREAU, F. NEVES, H. OBERHUMMER, S. O'BRIEN, J. PANCIN, C. PAPACHRISTODOULOU, C. PAPADOPOULOS, C. PARADELA, N. PATRONIS, A. PAVLIK, P. PAVLOPOULOS, L. PERROT, M.T. PIGNI, R. PLAG, A. PLOMPEN, A. PLUKIS, A. POCH, J. PRAENA, C. PRETEL, J. QUESADA, T. RAUSCHER, R. REIFARTH, C. RUBBIA, G. RUDOLF, P. RULLHUSEN, J. SALGADO, C. SANTOS, L. SARCHIAPONE, I. SAVVIDIS, C. STEPHAN, G. TAGLIENTE, J.L. TAIN, L. TASSAN-GOT, L. TAVORA, R. TERLIZZI, VANNINI G., P. VAZ, A. VENTURA, D. VILLAMARIN, M.C. VICENTE, V. VLACHOUDIS, R. VLASTOU, F. VOSS, S. WALTER, M. WIESCHER, and K. WISSHAK

Subjects
STELLAR NUCLEOSYNTHESIS, NEUTRON RESONANCE ANALYSES, R-MATRIX ANALYSIS, NEUTRON CAPTURE REACTIONS, TIME DURATION OF GALACTIC NUCLEOSYNTHESIS
Abstract

Neutron resonance analyses have been performed for the capture cross sections of 186Os, 187Os, and 188Os measured at the n_TOF facility at cern. Resonance parameters have been extracted up to 5, 3, and 8 keV, respectively, using the sammy code for a full R-matrix fit of the capture yields. From these results average resonance parameters were derived by a statistical analysis to provide a comprehensive experimental basis for modeling of the stellar neutron capture rates of these isotopes in terms of the Hauser-Feshbach statistical model. Consistent calculations for the capture and inelastic reaction channels are crucial for the evaluation of stellar enhancement factors to correct the Maxwellian averaged cross sections obtained from experimental data for the effect of thermally populated excited states. These factors have been calculated for the full temperature range of current scenarios of s-process nucleosynthesis using the combined information of the experimental data in the region of resolved resonances and in the continuum. The consequences of this analysis for the s-process component of the 187Os abundance and the related impact on the evaluation of the time duration of galactic nucleosynthesis via the Re/Os cosmochronometer are discussed.

Published
2010

16. n_TOF Experiment: Past, Present And Future

Author

S. Marrone, U. Abbondanno, G. Aerts, H. Álvarez, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Bečvář, E. Berthoumieux, M. Calviani, F. Calviño, D. Cano-Ott, R. Capote, A. Carnllo de Albornoz, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillmann, R. Dolfini, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadis, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marques, L. Fitzpatrick, H. Frais-Koelbl, K. Fujii, W. Furman, R. Gallino, I. Goncalves, E. Gonzalez-Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, S. Isaev, E. Jericha, Y. Kadi, F. Käppeler, D. Karamanis, D. Karadimos, M. Kerveno, V. Ketlerov, P. Koehler, V. Konovalov, E. Kossionides, M. Krtička, C. Lamboudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, L. Marques, C. Massimi, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O’Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulos, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, M. Pignatari, R. Plag, A. Plompen, A. Plukis, A. Poch, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, L. Sarchiapone, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, H. Wendler, M. Wiescher, K. Wisshak, Dugersuren Dashdorj, Undraa Agvaanluvsan, Gary E. Mitchell, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, European Commission Joint Research Centre European Community (EC), Dugersuren Dashdorj , Undraa Agvaanluvsan and Gary E. Mitchell, S. Marrone, U. Abbondanno, G. Aert, H. Álvarez, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulo, L. Audouin, G. Badurek, P. Baumann, F. Bečvář, E. Berthoumieux, M. Calviani, F. Calviño, D. Cano-Ott, R. Capote, A. Carnllo de Albornoz, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillmann, R. Dolfini, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadi, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marque, L. Fitzpatrick, H. Frais-Koelbl, K. Fujii, W. Furman, R. Gallino, I. Goncalve, E. Gonzalez-Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, C. Guerrero, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, S. Isaev, E. Jericha, Y. Kadi, F. Käppeler, D. Karamani, D. Karadimo, M. Kerveno, V. Ketlerov, P. Koehler, V. Konovalov, E. Kossionide, M. Krtička, C. Lamboudi, H. Leeb, A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, L. Marque, C. Massimi, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O’Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulo, C. Paradela, N. Patroni, A. Pavlik, P. Pavlopoulo, L. Perrot, M. Pignatari, R. Plag, A. Plompen, A. Pluki, A. Poch, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, L. Sarchiapone, I. Savvidi, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, H. Wendler, M. Wiescher, K. Wisshak, Dugersuren Dashdorj, Undraa Agvaanluvsan, and Gary E. Mitchell

Subjects
Physics, Large Hadron Collider, Fission, Physics::Instrumentation and Detectors, Nuclear Theory, Measure (physics), Th/U fuel cycle, nuclear technologie, spallation neutron source, Nuclear physics, Neutron capture and fission cross sections, Neutron capture, Nuclear technology, Upgrade, MINOR ACTINIDES TRANSMUTATIONS, Photon strength function, Data analysis, Physics::Accelerator Physics, Neutron, Nuclear Experiment
Abstract

The neutron Time-of-Flight facility at CERN was built to measure the neutron capture and fission cross sections. A short description of the facility, the detectors and the data analysis techniques will be illustrated. A short review of the preliminary results on the fission cross sections is presented together with the implications in fundamental nuclear physics and in nuclear technologies. Future perspectives both for the experimental campaign and for the upgrade of the facility are discussed. European Commission Joint Research Centre European Community (EC) FIKW-CT-2000-00107

Published
2009

17. High-accuracy U233(n,f) cross-section measurement at the white-neutron source n_TOF from near-thermal to 1 MeV neutron energy

Author

M. Calviani, J. Praena, U. Abbondanno, G. Aerts, H. Alvarez, F. Alvarez Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Becvar, E. Berthoumieux, F. Calvino, D. Cano Ott, R. Capote, C. Carrapico, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillmann, C. Domingo Pardo, W. Dridi, I. Duran, C. Eleftheriadis, L. Ferrant, A. Ferrari, R. Ferreira Marques, K. Fujii, W. Furman, I. Goncalves, E. Gonzalez Romero, F. Gramegna, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera Martinez, M. Igashira, E. Jericha, F. Kappeler, Y. Kadi, D. Karadimos, M. Kerveno, P. Koehler, E. Kossionides, M. Krticka, C. Lampoudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martinez, P. Mastinu, E. Mendoza, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O'Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulos, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santos, L. Sarchiapone, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan Got, L. Tavora, R. Terlizzi, P. Vaz, A. Ventura, D. Villamarin, M. C. Vicente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, M. Wiescher, K. Wisshak, MASSIMI, CRISTIAN, VANNINI, GIANNI, M. Calviani, J. Praena, U. Abbondanno, G. Aert, H. Alvarez, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulo, L. Audouin, G. Badurek, P. Baumann, F. Becvar, E. Berthoumieux, F. Calvino, D. Cano-Ott, R. Capote, C. Carrapico, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillmann, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadi, L. Ferrant, A. Ferrari, R. Ferreira-Marque, K. Fujii, W. Furman, I. Goncalve, E. Gonzalez-Romero, F. Gramegna, C. Guerrero, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, E. Jericha, F. Kappeler, Y. Kadi, D. Karadimo, M. Kerveno, P. Koehler, E. Kossionide, M. Krticka, C. Lampoudi, H. Leeb, A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martinez, C. Massimi, P. Mastinu, E. Mendoza, A. Mengoni, P.M. Milazzo, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, S. O'Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulo, C. Paradela, N. Patroni, A. Pavlik, P. Pavlopoulo, L. Perrot, M.T. Pigni, R. Plag, A. Plompen, A. Pluki, A. Poch, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santo, L. Sarchiapone, I. Savvidi, C. Stephan, G. Tagliente, J.L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M.C. Vicente, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, M. Wiescher, and K. Wisshak

Subjects
NETRON INDUCED REACTIONS, Nuclear Experiment, NUCLEAR FISSION
Abstract

The U233(n,f) cross section has been measured at the white neutron source n-TOF in a wide energy range with a dedicated fission ionization chamber. We report here the results from ∼30 meV to 1 MeV neutron energy. The U233(n,f) cross section has been determined relative to a reference sample of U235(n,f) measured simultaneously with the same detector. The very high instantaneous neutron flux and the intrinsically low background of the n-TOF installation result in an accuracy around 3% in the whole energy range, while the energy resolution of the neutron beam allows for an accurate description of the fission cross section by means of R-matrix analysis over a wide energy range. The results are, in general, in good agreement with the most recent high-accuracy measurement of this fission cross section, over the more limited range of the previous measurements, and indicated that even the latest evaluations underestimate the cross section in the epithermal region. The present high-quality data provide the basis for a more precise evaluation of the U233 fission cross section and for improving the reliability of databases needed for the design of new energy systems based on the Th/U cycle. © 2009 The American Physical Society

Published
2009

18. Neutron capture cross section of 90-Zr: Bottleneck in the s-process reaction flow

Author

G. Tagliente, K. Fujii, P. M. Milazzo, C. Moreau, G. Aerts, U. Abbondanno, F. Alvarez Velarde, H. Alvarez Pol, S. Andriamonje, J. Andrzejewski, G. Badurek, P. Baumann, F. Becvar, J. Benlliure, E. Berthoumieux, F. Calvino, D. Cano Ott, R. Capote, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, D. Cortina, A. Couture, J. Cox, S. Dababneh, M. Dahlfors, S. David, R. Dolfini, C. Domingo Pardo, I. Duran, M. Embid Segura, L. Ferrant, A. Ferrari, R. Ferrera Marques, H. Frais Koelbl, W. Furman, I. Goncalves, R. Gallino, E. Gonzalez Romero, A. Goverdoski, F. Gramegna, E. Griesmayer, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera Martinez, S. Isaev, E. Jericha, F. Kaeppeler, Y. Kadi, D. Karadimos, M. Kerveno, V. Ketlerov, P. Koehler, V. Konovalov, M. Krticka, C. Lamboudis, H. Leeb, A. Lindote, I. Lopes, G. Lorusso, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, J. Martinez Val, P. Mastinu, A. Mengoni, A. Molina Coballes, M. Mosconi, F. Neves, H. Oberhummer, S. O'Brien, J. Pancin, T. Papaevangelou, C. Paradela, A. Pavlik, P. Pavlopoulos, J. M. Perlado, L. Perrot, M. Pignatari, R. Plag, A. Plompen, A. Plukis, A. Poch, A. Policarpo, C. Pretel, J. Quesada, W. Rapp, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, I. C. Soares, C. Stephan, J. L. Tain, L. Tassan Got, L. Tavora, R. Terlizzi, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, F. Voss, H. Wendler, M. Wiescher, K. Wisshak, MASSIMI, CRISTIAN, VANNINI, GIANNI, G. Tagliente, K. Fujii, P.M. Milazzo, C. Moreau, G. Aert, U. Abbondanno, F. Alvarez-Velarde, H. Alvarez-Pol, S. Andriamonje, J. Andrzejewski, G. Badurek, P. Baumann, F. Becvar, J. Benlliure, E. Berthoumieux, F. Calvino, D. Cano-Ott, R. Capote, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, D. Cortina, A. Couture, J. Cox, S. Dababneh, M. Dahlfor, S. David, R. Dolfini, C. Domingo-Pardo, I. Duran, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferrera-Marque, H. Frais-Koelbl, W. Furman, I. Goncalve, R. Gallino, E. Gonzalez-Romero, A. Goverdoski, F. Gramegna, E. Griesmayer, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, S. Isaev, E. Jericha, F. Kaeppeler, Y. Kadi, D. Karadimo, M. Kerveno, V. Ketlerov, P. Koehler, V. Konovalov, M. Krticka, C. Lamboudi, H. Leeb, A. Lindote, I. Lope, G. Lorusso, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, J. Martinez-Val, C. Massimi, P. Mastinu, A. Mengoni, A. Molina-Coballe, M. Mosconi, F. Neve, H. Oberhummer, S. O'Brien, J. Pancin, T. Papaevangelou, C. Paradela, A. Pavlik, P. Pavlopoulo, J.M. Perlado, L. Perrot, M. Pignatari, R. Plag, A. Plompen, A. Pluki, A. Poch, A. Policarpo, C. Pretel, J. Quesada, W. Rapp, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, I.C. Soare, C. Stephan, J.L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M.C. Vincente, V. Vlachoudi, F. Vo, H. Wendler, M. Wiescher, and K. Wisshak.

Subjects
NUCLEAR ASTROPHYSICS, NUCLEAR PHYSICS, NEUTRON CAPTURE REACTIONS
Published
2008

19. Neutron interferometry

Author

G. Badurek and H. Rauch

Subjects
Electrical and Electronic Engineering, Condensed Matter Physics, Electronic, Optical and Magnetic Materials
Published
2000

20. Measurement of the radiative neutron capture cross section of 206-Pb and its astrophysical implication

Author

C. Domingo Pardo, U. Abbondanno, G. Aerts, H. Álvarez, F. Alvarez Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Becvár, E. Berthoumieux, S. Bisterzo, F. Calviño, D. Cano Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillman, R. Dolfini, W. Dridi, I. Duran, C. Eleftheriadis, M. Embid Segura, L. Ferrant, A. Ferrari, R. Ferreira Marques, L. Fitzpatrick, H. Frais Koelbl, K. Fujii, W. Furman, R. Gallino, I. Goncalves, E. Gonzalez Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera Martinez, M. Igashira, S. Isaev, E. Jericha, Y. Kadi, F. Käppeler, D. Karamanis, D. Karadimos, M. Kerveno, V. Ketlerov, P. Koehler, V. Konovalov, E. Kossionides, M. Krtička, C. Lamboudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, M. Oshima, S. O'Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulos, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, R. Plag, A. Plompen, A. Plukis, A. Poch, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, L. Sarchiapone, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan Got, L. Tavora, R. Terlizzi, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, H. Wendler, M. Wiescher, K. Wisshak, MASSIMI, CRISTIAN, VANNINI, GIANNI, C. Domingo-Pardo, U. Abbondanno, G. Aert, H. Álvarez, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulo, L. Audouin, G. Badurek, P. Baumann, F. Becvár, E. Berthoumieux, S. Bisterzo, F. Calviño, D. Cano-Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillman, R. Dolfini, W. Dridi, I. Duran, C. Eleftheriadi, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marque, L. Fitzpatrick, H. Frais-Koelbl, K. Fujii, W. Furman, R. Gallino, I. Goncalve, E. Gonzalez-Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, C. Guerrero, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, S. Isaev, E. Jericha, Y. Kadi, F. Käppeler, D. Karamani, D. Karadimo, M. Kerveno, V. Ketlerov, P. Koehler, V. Konovalov, E. Kossionide, M. Krtička, C. Lamboudi, H. Leeb, A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, C. Massimi, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, M. Oshima, S. O'Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulo, C. Paradela, N. Patroni, A. Pavlik, P. Pavlopoulo, L. Perrot, R. Plag, A. Plompen, A. Pluki, A. Poch, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, L. Sarchiapone, I. Savvidi, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, H. Wendler, M. Wiescher, and K. Wisshak(n_TOF Collaboration)

Subjects
NUCLEAR ASTROPHYSICS, NEUTRON CAPTURE REACTION, NUCLEAR PHYSICS
Published
2007

21. Resonance capture cross section of 207Pb

Author

C. Domingo Pardo, U. Abbondanno, G. Aerts, H. Álvarez Pol, F. Alvarez Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Becvár, E. Berthoumieux, S. Bisterzo, F. Calviño, D. Cano Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillman, R. Dolfini, W. Dridi, I. Duran, C. Eleftheriadis, M. Embid Segura, L. Ferrant, A. Ferrari, R. Ferreira Marques, L. Fitzpatrick, H. Frais Koelbl, K. Fujii, W. Furman, R. Gallino, I. Goncalves, E. Gonzalez Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera Martinez, M. Igashira, S. Isaev, E. Jericha, Y. Kadi, F. Käppeler, D. Karamanis, D. Karadimos, M. Kerveno, V. Ketlerov, P. Koehler, V. Konovalov, E. Kossionides, M. Krtička, C. Lamboudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, M. Oshima, S. O'Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulos, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, R. Plag, A. Plompen, A. Plukis, A. Poch, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, L. Sarchiapone, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan Got, L. Tavora, R. Terlizzi, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, H. Wendler, M. Wiescher, K. Wisshak, VANNINI, GIANNI, Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), nTOF, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), C. Domingo-Pardo, U. Abbondanno, G. Aert, H. Álvarez-Pol, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulo, L. Audouin, G. Badurek, P. Baumann, F. Becvár, E. Berthoumieux, S. Bisterzo, F. Calviño, D. Cano-Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Corte, A. Couture, J. Cox, M. Dahlfor, S. David, I. Dillman, R. Dolfini, W. Dridi, I. Duran, C. Eleftheriadi, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marque, L. Fitzpatrick, H. Frais-Koelbl, K. Fujii, W. Furman, R. Gallino, I. Goncalve, E. Gonzalez-Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, C. Guerrero, F. Gunsing, B. Haa, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, S. Isaev, E. Jericha, Y. Kadi, F. Käppeler, D. Karamani, D. Karadimo, M. Kerveno, V. Ketlerov, P. Koehler, V. Konovalov, E. Kossionide, M. Krtička, C. Lamboudi, H. Leeb, A. Lindote, I. Lope, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neve, H. Oberhummer, M. Oshima, S. O'Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulo, C. Paradela, N. Patroni, A. Pavlik, P. Pavlopoulo, L. Perrot, R. Plag, A. Plompen, A. Pluki, A. Poch, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, L. Sarchiapone, I. Savvidi, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, H. Wendler, M. Wiescher, and K. Wisshak(n_TOF Collaboration)

Subjects
25.40.Lw, 27.80.+w, 97.10.Cv, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Nuclear Physics - Experiment, S-PROCESS AND R-PROCESS, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment (nucl-ex), NEUTRON TIME OF FLIGHT, Nuclear Experiment, NEUTRON CAPTURE CROSS SECTION
Abstract

The radiative neutron capture cross section of 207Pb has been measured at the CERN neutron time of flight installation n_TOF using the pulse height weighting technique in the resolved energy region. The measurement has been performed with an optimized setup of two C6D6 scintillation detectors, which allowed us to reduce scattered neutron backgrounds down to a negligible level. Resonance parameters and radiative kernels have been determined for 16 resonances by means of an R-matrix analysis in the neutron energy range from 3 keV to 320 keV. Good agreement with previous measurements was found at low neutron energies, whereas substantial discrepancies appear beyond 45 keV. With the present results, we obtain an s-process contribution of 77(8)% to the solar abundance of 207Pb. This corresponds to an r-process component of 23(8)%, which is important for deriving the U/Th ages of metal poor halo stars., 7 pages, 3 figures, to be published in Phys. Rev. C

Published
2006

22. Experimental Separation of Geometric and Dynamical Phases Using Neutron Interferometry

Author

J Summhammer, H Weinfurter, Apoorva G. Wagh, Veer Chand Rakhecha, David L. Jacobson, K. Hamacher, G Badurek, Helmut Kaiser, Samuel A. Werner, and Brendan E. Allman

Subjects
Physics, General Physics and Astronomy, Translation (geometry), Interferometry, symbols.namesake, Classical mechanics, Pauli exclusion principle, Geometric phase, Quantum mechanics, symbols, Neutron, Spin (physics), Rotation (mathematics), Neutron interferometer
Abstract

We present results of the first experiment clearly demarcating geometric and dynamical phases. These two phases arise from two distinct physical operations, a rotation and a linear translation, respectively, performed on two identical spin flippers in a neutron interferometer. A reversal of the current in one flipper results in a pure geometric phase shift of \ensuremath{\pi} radians. This observation constitutes the first direct verification of Pauli anticommutation, implemented in neutron interferometry.

Published
1997

23. Neutron-induced fission cross section measurement of 233 U, 241 Am and 243 Am in the energy range 0.5 MeV ? E n ? 20 MeV at n_TOF at CERN

Author

Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, M. Barbagallo, P. Baumann, E. Berthoumieux, F. Cerutti, C. Rubbia, I. Lopes, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, S. Walter, R. Vlastou, R. Capote, H. Wendler, M. Wiescher, K. Wisshak, R. Dolfini, n, T. O. F. Collaboration, F. Belloni, P. M. Milazzo, M. Calviani, N. Colonna, A. Ferrari, P. Mastinu, U. Abbondanno, G. Aerts, A. Carrillo de Albornoz, P. Cennini, C. Domingo-Pardo, V. Chepel, E. Chiaveri, R. Ferreira-Marques, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillmann, W. Dridi, I. Duran, L. Fitzpatrick, C. Eleftheriadis, M. Embid-Segura, L. Ferrant, H. Frais-Koelbl, K. Fujii, V. Ketlerov, W. Furman, I. Goncalves, A. Goverdovski, F. Gramegna, M. Lozano, E. Griesmayer, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Kerveno, M. Heil, A. Herrera-Martinez, M. Igashira, S. Isaev, E. Jericha, S. Lukic, F. K?ppeler, Y. Kadi, D. Karadimos, D. Karamanis, P. Koehler, V. Konovalov, E. Kossionides, M. Krti?ka, J. Marganiec, C. Lampoudis, C. Lederer, H. Leeb, P. Pavlopoulos, A. Lindote, L. Marques, S. Marrone, T. Mart?nez, C. Massimi, M. H. Meaze, A. Mengoni, G. Rudolf, C. Moreau, M. Mosconi, L. Perrot, F. Neves, H. Oberhummer, S. O' Brien, M. Oshima, J. Pancin, C. Papachristodoulou, C. Papadopoulos, C. Paradela, P. Rullhusen, N. Patronis, M. T Pigni, A. Pavlik, R. Plag, A. Plompen, A. Plukis, A. Poch, J. Praena, J. Salgado, C. Pretel, F. Voss, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Santos, L. Sarchiapone, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, A. Wallner, D. Cano-Ott, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, and P. Vaz

Abstract

Neutron-induced fission cross section measurements of 233 U, 243 Am and 241 Am relative to 235 U have been carried out at the neutron time-of-flight facility n_TOF at CERN. A fast ionization chamber has been employed. All samples were located in the same detector; therefore the studied elements and the reference 235 U target are subject to the same neutron beam. Physica Scripta

Published
2012

24. Neutron capture measuremetns on minor actinides at the n_TOF facility at CERN: past, present and future

Author

D. Cano-Ott, F. Alvarez-Velarde, E. GonzaLez-Romero, C. Guerrero, T. Martinez, E. Mendoza, D. Villamarin, M. C. Vicente, U. Abbondanno, N. Colonna, M. H. Meaze, S. Marrone, G. Tagliente, R. Terlizzi, F. Belloni, K. Fujii, P. M. Milazzo, C. Moreau, S. Andriamonje, M. Calviani, E. Chiaveri, Y. Kadi, V. Vlachoudis, J. Andrzejewski, J. Marganiec, P. Assimakopoulos, D. Karadimos, D. Karamanis, C. Papachristodoulou, N. Patronis, L. Audouin, S. David, L. Ferrant, S. Isaev, C. Stephan, L. Tassan-Got, G. Badurek, E. Jericha, H. Leeb, H. Oberhummer, M. T. Pigni, P. Baumann, M. Kerveno, S. Lukic, G. Rudolf, F. Becvar, M. Krticka, F. Calvino, H. Frais-Koelbl, E. Griesmayer, R. Capote, M. Lozano, J. Quesada, A. Mengoni, A. Carrillo De Albornoz, L. Marques, J. Salgado, L. Tavora, P. Vaz, P. Cennini, M. Dahlfors, A. Ferrari, F. Gramegna, A. Herrera-Martinez, P. Mastinu, J. Praena, L. Sarchiapone, H. Wendler, V. Chepel, R. Ferreira-Marques, I. Goncalves, A. J. Praena, A. Lindote, I. Lopes, F. Neves, G. Aerts, E. Berthoumieux, W. Dridi, F. Gunsing, J. Pancin, L. Perrot, A. Plukis, C. Lampoudis, G. Cortes, A. Poch, C. Pretel, A. Couture, J. Cox, S. O'Brien, M. Wiescher, I. Dillman, M. Heil, F. Kappeler, M. Mosconi, R. Plag, F. Plag, S. Walter, K. Wisshak, R. Dolfini, C. Rubbia, C. Domingo-Pardo, J. L. Tain, C. Eleftheriadis, I. Savvidis, W. Furman, V. Konovalov, A. Goverdovski, V. Ketlerov, H. Alvarez, I. Duran, C. Paradela, B. Haas, R. Haight, R. Reifarth, M. Igashira, P. Koehler, E. Kossionides, C. Massimi, G. Vannini, M. Oshima, C. Papadopoulos, R. Vlastou, A. Pavlik, P. Pavlopoulos, A. Plompen, P. Rullhusen, T. Rauscher, M. Rosetti, A. Ventura, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, Cano-Ott D., Alvarez-Velarde F., GonzaLez-Romero E., Guerrero C., Martinez T., Mendoza E., Villamarin D., Vicente M. C., Abbondanno U., Colonna N., Meaze M. H., Marrone S., Tagliente G., Terlizzi R., Belloni F., Fujii K., Milazzo P. M., Moreau C., Andriamonje S., Calviani M., Chiaveri E., Kadi Y., Vlachoudis V., Andrzejewski J., Marganiec J., Assimakopoulos P., Karadimos D., Karamanis D., Papachristodoulou C., Patronis N., Audouin L., David S., Ferrant L., Isaev S., Stephan C., Tassan-Got L., Badurek G., Jericha E., Leeb H., Oberhummer H., Pigni M. T., Baumann P., Kerveno M., Lukic S., Rudolf G., Becvar F., Krticka M., Calvino F., Frais-Koelbl H., Griesmayer E., Capote R., Lozano M., Quesada J., Mengoni A., Carrillo De Albornoz A., Marques L., Salgado J., Tavora L., Vaz P., Cennini P., Dahlfors M., Ferrari A., Gramegna F., Herrera-Martinez A., Mastinu P., Praena J., Sarchiapone L., Wendler H., Chepel V., Ferreira-Marques R., Goncalves I., Praena A. J., Lindote A., Lopes I., Neves F., Aerts G., Berthoumieux E., Dridi W., Gunsing F., Pancin J., Perrot L., Plukis A., Lampoudis C., Cortes G., Poch A., Pretel C., Couture A., Cox J., OBrien S., Wiescher M., Dillman I., Heil M., Kappeler F., Mosconi M., Plag R., Plag F., Walter S., Wisshak K., Dolfini R., Rubbia C., Domingo-Pardo C., Tain J. L., Eleftheriadis C., Savvidis I., Furman W., Konovalov V., Goverdovski A., Ketlerov V., Alvarez H., Duran I., Paradela C., Haas B., Haight R., Reifarth R., Igashira M., Koehler P., Kossionides E., Massimi C., Vannini G., Oshima M., Papadopoulos C., Vlastou R., Pavlik A., Pavlopoulos P., Plompen A., Rullhusen P., Rauscher T., Rosetti M., Ventura A., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Aval du cycle et Energie Nucléaire (ACEN), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Département Recherches Subatomiques (DRS-IPHC), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Pôle Universitaire Léonard de Vinci, Pôle Universitaire Léonard de Vinci (PULV), nTOF, Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Neutron capture, Nuclear transmutation, ADS, neutron induced capture cross section, Nuclear data, General Physics and Astronomy, chemistry.chemical_element, Nuclear reactor, Americium, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Neutrons--Capture, law.invention, Nuclear physics, Actinides, law, 0103 physical sciences, Neutron, 010306 general physics, n TOF, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Nuclear waste, Cross section, 010308 nuclear & particles physics, Total Absorption Calorimeter, technology, industry, and agriculture, Radioactive waste, Barium uoride, TAC, Nuclear energy, Transmutation, Plutonium, Generation IV, chemistry, Total Absorprion calorimeter, Accelerator driven system, Uranium, Energia nuclear
Abstract

The successful development of advanced nuclear systems for sustainable energy production and nuclear waste management depends on high quality nuclear data libraries. Recent sensitivity stud- ies and reports [1-3] have identi ed the need for substantially improving the accuracy of neutron cross-section data for minor actinides. The n TOF collaboration has initiated an ambitious exper- imental program for the measurement of neutron capture cross sections of minor actinides. Two experimental setups have been constructed for this purpose: a Total Absorption Calorimeter (TAC) [4] for measuring neutron capture cross-sections of low-mass and/or radioactive samples and a set of two low neutron sensitivity C6D6 detectors for the less radioactive materials.

Published
2011

25. Magnetic properties and neutron depolarization studies of nanocrystalline Pr12Fe82B6

Author

M Dahlgren, G Badurek, and R. Grössinger

Subjects
Materials science, Field (physics), Condensed matter physics, Depolarization, Condensed Matter Physics, Nanocrystalline material, Electronic, Optical and Magnetic Materials, Condensed Matter::Materials Science, Magnetic anisotropy, Nuclear magnetic resonance, Nanocrystal, Neutron, Texture (crystalline), Anisotropy
Abstract

Both the hysteresis loop and the anisotropy field of nanocrystalline Pr12Fe82B6 were measured as function of temperature in a pulsed field system. Supplementary three-dimensional neutron depolarization experiments were performed with the same sample in order to determine its mean domain size and to reveal an eventual magnetic texture.

Published
2001

26. Neutron physics of the Re/Os clock. I. Measurement of the (n,γ) cross sections ofOs186,187,188at the CERN n_TOF facility

Author

A. J. M. Plompen, L. Tavora, M. Krtička, F. Calviño, A. Pavlik, F. Voss, D. Karamanis, I. Dillmann, R. Ferreira-Marques, V. Chepel, R. C. Haight, Vasilis Vlachoudis, H. Alvarez-Pol, P. Rullhusen, G. Rudolf, C. Paradela, James L. Cox, L. Sarchiapone, S. Lukic, F. Gramegna, L. Audouin, E. Jericha, S. David, R. Gallino, Matthias Heil, G. Tagliente, J. Pancin, G. Cortes, P. Cennini, Carlos Guerrero, U. Abbondanno, Michael Wiescher, V. Ketlerov, M. Oshima, Sara Bisterzo, S. Andriamonje, E. Griesmayer, M. C. Vincente, A. Herrera-Martinez, N. Patronis, F. Bečvář, Heinz Oberhummer, Y. Kadi, E. Chiaveri, M. Embid-Segura, H. Frais-Koelbl, C. T. Papadopoulos, M. Mosconi, Arnaud Ferrari, J. Andrzejewski, P. F. Mastinu, J. Marganiec, Alberto Mengoni, P. Baumann, G. Aerts, J. Salgado, F. Käppeler, L. Perrot, Masayuki Igashira, A. Poch, G. Badurek, S. Walter, Manuel Lozano, C. Eleftheriadis, C. Rubbia, Corrie S. Moreau, S. Isaev, S. O'Brien, K. Wisshak, F. Neves, N. Colonna, F. Alvarez-Velarde, Isabel S. Gonçalves, Thomas Rauscher, P. M. Milazzo, P. E. Koehler, A. Ventura, Ralf Plag, S. Marrone, M. Dahlfors, Roberto Capote, P.A. Assimakopoulos, L. Marques, R. Terlizzi, M. Kerveno, Isabel Lopes, D. Karadimos, E. Kossionides, R. Vlastou, P. Vaz, G. Vannini, Javier Praena, D. Cano-Ott, E. Berthoumieux, I. Duran, A. Plukis, Rene Reifarth, E. González-Romero, A. Carrillo de Albornoz, W.I. Furman, I. Savvidis, J. M. Quesada, Aaron Couture, H. Wendler, L. Tassan-Got, M. Calviani, C. Domingo-Pardo, V. Konovalov, C. Stephan, B. Haas, C. Lamboudis, J. L. Tain, M. Rosetti, F. Gunsing, C. A. Papachristodoulou, W. Dridi, Cristian Massimi, H. Leeb, P. Pavlopoulos, L. Ferrant, K. Fujii, L. Fitzpatrick, D. Villamarin, Fabio Belloni, C. Pretel, A. Lindote, A. Goverdovski, and R. Dolfini

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Gamma ray, Scintillator, 01 natural sciences, 7. Clean energy, Nuclear physics, Neutron capture, 13. Climate action, Nucleosynthesis, 0103 physical sciences, Neutron, s-process, 010303 astronomy & astrophysics, Radioactive decay
Abstract

The precise determination of the neutron capture cross sections of Os-186 and Os-187 is important to define the s-process abundance of Os-187 at the formation of the solar system. This quantity can be used to evaluate the radiogenic component of the abundance of Os-187 due to the decay of the unstable Re-187 (t(1/2) = 41.2 Gyr) and from this to infer the time duration of the nucleosynthesis in our galaxy (Re/Os cosmochronometer). The neutron capture cross sections of Os-186, Os-187, and Os-188 have been measured at the CERN n_TOF facility from 1 eV to 1 MeV, covering the entire energy range of astrophysical interest. The measurement has been performed by time-of-flight technique using isotopically enriched samples and two C6D6 scintillation detectors for recording the prompt. rays emitted in the capture events. Maxwellian averaged capture cross sections have been determined for thermal energies between kT = 5 and 100 keV corresponding to all possible s-process scenarios. The estimated uncertainties for the values at 30 keV are 4.1, 3.3, and 4.7% for Os-186, Os-187, and Os-188, respectively.

Published
2010

27. 197Au(n,γ ) cross section in the resonance region

Author

Massimi, C., Domingo-Pardo, C., Vannini, G., Audouin, L., Guerrero, C., Abbondanno, U., Aerts, G., Alvarez, H., Alvarez-Velarde, F., Andriamonje, S., Andrzejewski, J., Assimakopoulos, P., G. Badurek, †, Baumann, P., Becvar, F., Belloni, F., Berthoumieux, E., Calvino, F., Calviani, M., Cano-Ott, D., Capote, R., Carrapico, C., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Couture, A., Cox, J., Dahlfors, M., David, S., Dillmann, I., Dridi, W., Duran, I., Eleftheriadis, C., Ferrant, L., Ferrari, Anthony, Ferreira-Marques, R., Fujii, K., Furman, W., Galanopoulos, S., F. Gonc¸alves, I., Gonz'Alez-Romero, E., Gramegna, F., Gunsing, F., Haas, B., Haight, R., Heil, M., Herrera-Martinez, A., Igashira, M., Jericha, E., Kappeler, F., Kadi, Y., Karadimos, D., Karamanis, D., Kerveno, M., Koehler, P., Kossionides, E., Krticka, M., Lampoudis, C., Lederer, C., Leeb, H., Lindote, A., Lopes, I., Lozano, M., Lukic, S., Marganiec, J., Marrone, S., Martinez, T., Mastinu, P., Mendoza, E., Mengoni, A., M. Milazzo, P., Moreau, C., Mosconi, M., Neves, F., Oberhummer, H., O'Brien, S., Pancin, J., Papadopoulos, C., Paradela, C., Pavlik, A., Pavlopoulos, P., Perdikakis, G., Perrot, L., T. Pigni, M., Plag, R., Plompen, A., Plukis, A., Poch, A., Praena, J., Pretel, C., Quesada, J., Rauscher, T., Reifarth, R., Rosetti, M., Rubbia, C., Rudolf, G., Rullhusen, P., Sarchiapone, L., Sarmento, R., Savvidis, I., Stephan, C., Tagliente, G., L. Tain, J., Tassan-Got, L., Tavora, L., Terlizzi, R., Vaz, P., Ventura, A., Villamarin, D., Vlachoudis, V., Vlastou, R., Voss, F., Walter, S., Wiescher, M., Wisshak, K., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Pôle Universitaire Léonard de Vinci, Pôle Universitaire Léonard de Vinci (PULV), nTOF, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 25.40.Ny, 25.40.Lw, 29.30.Hs, 27.80.+w
Abstract

The (n,γ ) cross section of 197Au has been measured at n TOF in the resolved resonance region, up to 5 keV,with the aim of improving the accuracy in an energy range where it is not yet considered standard. The measurements were performed with two different experimental setup and detection techniques, the total energy method based on C6D6 detectors, and the total absorption calorimetry based on a 4π BaF2 array. By comparing the data collected with the two techniques, two accurate sets of neutron-capture yields have been obtained, which could be the basis for a new evaluation leading to an extended cross-section standard. Overall good agreement is found between the n TOF results and evaluated cross sections, with some significant exceptions for small resonances. A few resonances not included in the existing databases have also been observed.

Published
2010

28. Neutron phase-echo concept and a proposal for a dynamical neutron polarisation method

Author

Anton Zeilinger, G. Badurek, and H. Rauch

Subjects
Nuclear physics, Physics, Interferometry, Spectrometer, Astrophysics::High Energy Astrophysical Phenomena, Neutron, Neutron radiation, Neutron scattering, Nuclear Experiment, Small-angle neutron scattering, Neutron spin echo, Coherence (physics)
Abstract

Experiments in the field of neutron interferometry can be interpreted in terms of a neutron phase-echo concept, which is closely related to the spin-echo concept. Phase echo analysis can be done even with unpolarized neutron beams if coherence between separate beams exists. Furthermore a method is proposed for a dynamical polarization of a neutron beam due to the combination of a momentum separation and a spin overlapping part. This system consists of a multistage h.f. flipper and one half of a spin-echo spectrometer and allows an optimal use of available neutrons.

Published
2008

29. The 234U neutron capture cross section measurement at the n TOF facility

Author

C. Lampoudis, U. Abbondanno, G. Aerts, H. Álvarez, F. Álvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Bečvář, E. Berthoumieux, F. Calviño, M. Calviani, D. Cano-Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillmann, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadis, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marques, K. Fujii, W. Furman, I. Goncalves, E. González-Romero, F. Gramegna, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, E. Jericha, F. Käppeler, Y. Kadi, D. Karadimos, D. Karamanis, M. Kerveno, P. Koehler, E. Kossionides, M. Krtička, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martínez, C. Massimi, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O'Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulos, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santos, L. Sarchiapone, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, M. Wiescher, K. Wisshak, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, and Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions

Subjects
Physics, Large Hadron Collider, Neutron cross sections, Física [Àrees temàtiques de la UPC], Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Nuclear data, Calorimetry, Neutrons -- Seccions, Calorimeter, Nuclear physics, Neutron capture, R-matrices, Calorimetria, Neutron cross section, Neutron source, Spallation, Neutron, Física nuclear, Nuclear Experiment
Abstract

The neutron capture cross-section of 234U has been measured for energies from thermal up to the keV region in the neutron time-of-flight facility n TOF, based on a spallation source located at CERN. A 4π BaF2 array composed of 40 crystals, placed at a distance of 184.9 m from the neutron source, was employed as a total absorption calorimeter (TAC) for detection of the prompt γ-ray cascade from capture events in the sample. This text describes the experimental setup, all necessary steps followed during the data analysis procedure. Results are presented in the form of R-matrix resonance parameters from fits with the SAMMY code and compared to the evaluated data of ENDF in the relevant energy region, indicating the good performance of the n TOF facility and the TAC.

Published
2007

30. Simultaneous measurement of the neutron capture and fission yields of 233-U

Author

E. Berthoumieux, U. Abbondanno, G. Aerts, H. Álvarez, F. Álvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Bečvář, F. Calviño, M. Calviani, D. Cano-Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillmann, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadis, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marques, K. Fujii, W. Furman, I. Goncalves, E. González-Romero, F. Gramegna, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, E. Jericha, F. Käppeler, Y. Kadi, D. Karadimos, D. Karamanis, M. Kerveno, P. Koehler, E. Kossionides, M. Krtička, C. Lampoudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martínez, C. Massimi, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O'Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulos, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santos, L. Sarchiapone, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, M. Wiescher, K. Wisshak, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, and Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions

Subjects
Physics, Fission, Neutrons--Measurement, Nuclear Theory, Nuclear data, Fission product yield, Calorimetry, Calorimeter, Nuclear physics, Neutron capture, Calorimetria, Física::Astronomia i astrofísica [Àrees temàtiques de la UPC], Neutron cross section, Neutrons -- Mesurament, Neutron, Atomic physics, Absorption (electromagnetic radiation), Nuclear Experiment
Abstract

We have measured the neutron capture and fission cross section of 233U at the neutron time-of-flight facility n TOF at CERN in the energy range from 1 eV to 1 MeV with high accuracy by using a high performance 4π BaF2 Total Absorption Calorimeter (TAC) as a detection device. The method, based on the TAC energy response study, allowing to disentangle between γ’s originating from fission and capture will be presented as well as the first very preliminary results.

Published
2007

31. Measurement of neutron induced fission of 235U, 233U and 245Cm with the FIC detector at the CERN n_TOF facility

Author

Marco Calviani, Dimitrios Karadimos, U. Abbondanno, G. Aerts, H. Álvarez, F. Álvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Bečvář, E. Berthoumieux, F. Calviño, D. Cano-Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillmann, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadis, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marques, K. Fujii, W. Furman, I. Goncalves, E. González-Romero, F. Gramegna, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, E. Jericha, F. Käppeler, Y. Kadi, D. Karamanis, M. Kerveno, P. Koehler, E. Kossionides, M. Krtička, C. Lampoudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martínez, C. Massimi, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O'Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulos, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santos, L. Sarchiapone, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, M. Wiescher, K. Wisshak, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, and Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions

Subjects
Physics, Física [Àrees temàtiques de la UPC], Physics::Instrumentation and Detectors, Fission, Nuclear Theory, Nuclear data, Nuclear energy, Neutron radiation, Residus radioactius, Nuclear physics, Nuclear wastes, Neutron flux, Ionization chamber, Neutron cross section, Energia nuclear, Neutron, Spallation, Nuclear Experiment
Abstract

A series of measurements of neutron induced fission cross section of various TRU isotopes have been performed at the CERN n TOF spallation neutron facility, in the energy range from thermal to nearly 250 MeV. The experimental apparatus consists in a fast ionization chamber (FIC), used as a fission fragment detector with a high efficiency. Good discrimination between alphas and fission fragments can be obtained with a simple amplitude threshold. In order to allow the monitoring of the neutron beam and to extract the n TOF neutron flux, the well known cross section of the 235U(n,f) reaction, considered as a fission standard, has been used. Preliminary results for the cross section are shown for some selected isotopes such as 235U, 233U and 245Cm in the energy range from 0.050 eV to about 2MeV.

Published
2007

32. Neutron resonance spectroscopy at n TOF at CERN

Author

F. Gunsing, U. Abbondanno, G. Aerts, H. Álvarez, F. Álvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Bečvář, E. Berthoumieux, F. Calviño, M. Calviani, D. Cano-Ott, R. Capote, C. Carrapiço, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dillmann, C. Domingo-Pardo, W. Dridi, I. Duran, C. Eleftheriadis, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marques, K. Fujii, W. Furman, I. Goncalves, E. González-Romero, F. Gramegna, C. Guerrero, B. Haas, R. Haight, M. Heil, A. Herrera-Martinez, M. Igashira, E. Jericha, F. Käppeler, Y. Kadi, D. Karadimos, D. Karamanis, M. Kerveno, P. Koehler, E. Kossionides, M. Krtička, C. Lampoudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, S. Marrone, T. Martínez, C. Massimi, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O'Brien, J. Pancin, C. Papachristodoulou, C. Papadopoulos, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, J. Praena, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, C. Santos, L. Sarchiapone, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan-Got, L. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin, M. C. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, M. Wiescher, K. Wisshak, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, and Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions

Subjects
Physics, Large Hadron Collider, Astrophysics::High Energy Astrophysical Phenomena, Neutron stimulated emission computed tomography, Nuclear Theory, Nuclear structure, Nuclear data, Neutron scattering, Neutrons -- Seccions, Nuclear physics, Física::Astronomia i astrofísica [Àrees temàtiques de la UPC], Physics::Accelerator Physics, Neutron, Neutron resonance, Atomic physics, Spectroscopy, Nuclear Experiment, Excitation
Abstract

Neutron resonance spectroscopy plays an important role in the investigation of neutron induced reaction cross sections and nuclear structure in the MeV excitation range. Neutron time-of-flight facilities are the most used installations to explore neutron resonances. In this paper we describe the basic features of neutron resonance spectroscopy together with recent results from the time-of-flight facility n TOF at CERN.

Published
2007

33. The 139La(n,gamma) cross section: key for the onset of the s process

Author

R. TERLIZZI, U. ABBONDANNO, G. AERTS, H. ALVAREZ, F. ALVAREZ VELARDE, S. ANDRIAMONJE, J. ANDRZEJEWSKI, P. ASSIMAKOPOULOS, L. AUDOUIN, G. BADUREK, P. BUMAN, F. BECVAR, E. BERTOUMIEUX, M. CALVIANI, F. CALVINO, D. CANO OTT, R. CAPOTE, A. CARRILLO DE ALBORNOZ, P. CENNINI, VCHEPEL, E. CHIAVERI, N. COLONNA, G. CORTES, A. COUTURE, J. COX, M. DAHLFORS, S. DAVID, I. DILLMAN, R. DOLFINI, C. DOMINGO PARDO, W. DRIDI, I. DURAN, C. ELEFTHERIADIS, M. EMBID SEGURA, L. FERRANT, A. FERRARI, R. FERREIRA MARQUES, L. FITZPATRICK, H. FRAIS KOELBL, K. FUJII, W. FURMAN, R. GALLINO, I. GONCALVES, E. GONZALES ROMERO, A. GOVERDOVSKI, F. GRAMEGNA, E. GRIESMAYER, C. GUERRERO, F. GUNSING, B. HAAS, R. HAIGHT, M. HEIL, A. HERRERA MARTINEZ, M. IGASHIRA, S. ISAEV, E. JERICHA, Y. KADI, F. KAPPELER, D. KARAMANIS, D. KARADIMOS, M. KERVENO, V. KETLEROV, P. KOEHLER, V. KOLNOVALOV, E. KOSSIONIDES, M. KRTICKA, C. LAMBOUDIS, H. LEEB, A. LINDOTE, I. LOPES, M. LOZANO, S. LUKIC, J. MARGANIEC, L. MARQUES, S. MARRONE, P. MASTINU, A. MENGONI, P. M. MILAZZO, C. MOREAU, M. MOSCONI, F. NEVES, H. OBERHUMMER, S. O'BRIEN, J. PANCIN, C. PAPACHRISTODOULOU, C. PAPADOPOULOS, C. PARADELA, N. PATRONIS, A. PAVLIK, P. PAVLOPOULOS, L. PERROT, M. PIGNATARI, R. PLAG, A. PLOMPEN, A. PLUKIS, A. POCH, C. PRETEL, J. QUESADA, T. RAUSCHER, R. REIFARTH, M. ROSETTI, C. RUBBIA, G. RUDOLF, P. RULLHUSEN, J. SALGADO, L. SARCHIAPONE, I. SAVVIDIS, C. STEPHAN, G. TAGLIENTE, J. L. TAIN, L. TASSAN GOT, L. TAVORA, P. VAZ, A. VENTURA, D. VILLARMARIN, M. C. VINCENTE, V. VLACHOUDIS, R. VLASTOU, F. VOSS, S. WALTER, H. WENDLER, M. WIESCHER, K. WISSHAK, MASSIMI, CRISTIAN, VANNINI, GIANNI, R.TERLIZZI, U.ABBONDANNO, G.AERTS, H.ALVAREZ, F.ALVAREZ-VELARDE, S.ANDRIAMONJE, J.ANDRZEJEWSKI, P.ASSIMAKOPOULOS, L.AUDOUIN, G.BADUREK, P.BUMAN, F.BECVAR, E.BERTOUMIEUX, M.CALVIANI, F.CALVINO, D.CANO-OTT, R.CAPOTE, A.CARRILLO DE ALBORNOZ, P. CENNINI, VCHEPEL, E.CHIAVERI, N.COLONNA, G.CORTES, A.COUTURE, J.COX, M.DAHLFORS, S.DAVID, I.DILLMAN, R.DOLFINI, C.DOMINGO-PARDO, W.DRIDI, I.DURAN, C.ELEFTHERIADIS, M.EMBID-SEGURA, L. FERRANT, A.FERRARI, R.FERREIRA-MARQUES, L.FITZPATRICK, H. FRAIS-KOELBL, K.FUJII, W.FURMAN, R.GALLINO, I.GONCALVES, E.GONZALES-ROMERO, A.GOVERDOVSKI, F.GRAMEGNA, E.GRIESMAYER, C.GUERRERO, F.GUNSING, B.HAAS, R.HAIGHT, M.HEIL, A.HERRERA-MARTINEZ, M.IGASHIRA, S.ISAEV, E. JERICHA, Y.KADI, F.KAPPELER, D.KARAMANIS, D.KARADIMOS, M.KERVENO, V.KETLEROV, P.KOEHLER, V.KOLNOVALOV, E.KOSSIONIDES, M.KRTICKA, C.LAMBOUDIS, H.LEEB, A.LINDOTE, I.LOPES, M.LOZANO, S.LUKIC, J.MARGANIEC, L.MARQUES, S.MARRONE, C.MASSIMI, P.MASTINU, A.MENGONI, P.M.MILAZZO, C.MOREAU, M.MOSCONI, F.NEVES, H.OBERHUMMER, S.O'BRIEN, J.PANCIN, C.PAPACHRISTODOULOU, C. PAPADOPOULOS, C.PARADELA, N.PATRONIS, A.PAVLIK, P.PAVLOPOULOS, L.PERROT, M.PIGNATARI, R.PLAG, A.PLOMPEN, A.PLUKIS, A.POCH, C.PRETEL, J.QUESADA, T.RAUSCHER, R.REIFARTH, M.ROSETTI, C.RUBBIA, G.RUDOLF, P.RULLHUSEN, J.SALGADO, L.SARCHIAPONE, I.SAVVIDIS, C.STEPHAN, G.TAGLIENTE, J.L.TAIN, L.TASSAN-GOT, L.TAVORA, G.VANNINI, P.VAZ, A.VENTURA, D.VILLARMARIN, M.C.VINCENTE, V.VLACHOUDIS, R.VLASTOU, F.VOSS, S.WALTER, H.WENDLER, M.WIESCHER, and K.WISSHAK

Subjects
Nuclear Theory, Nuclear Physics - Experiment, Nuclear Experiment
Abstract

The nuclear resonance parameters and the capture cross section of the neutron magic isotope 139La has been measured n_TOF. The description of the experimental apparata is followed by the data analysis procedures. We extracted the resonance parameters, the main nuclear quantities such as the resonance integral, the average gamma widths for s- and p-waves, the nuclear level densities and the neutron strength functions. These results represent a signifcant improvement over previous data. The deduced Maxwellian-averaged capture cross sections are important for the interpretation of the most recent spectroscopic observations in low metallicity stars. The nuclear resonance parameters and the capture cross section of the neutron magic isotope 139La has been measured n_TOF. The description of the experimental apparata is followed by the data analysis procedures. We extracted the resonance parameters, the main nuclear quantities such as the resonance integral, the average gamma widths for s- and p-waves, the nuclear level densities and the neutron strength functions. These results represent a signifcant improvement over previous data. The deduced Maxwellian-averaged capture cross sections are important for the interpretation of the most recent spectroscopic observations in low metallicity stars.

Published
2006

34. NEUTRON CAPTURE CROSS SECTION OF 232Th AT THE n_TOF FACILITY AT CERN IN THE UNRESOLVED RESONANCE REGION UP TO 1 MeV

Author

G. Aerts, U. Abbondanno, H. Alvarez, F. Alvarez Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Becvar, E. Berthomieux, F. Calvino, D. Cano Ott, R. Capote, A. Carrillo de Albornoz, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, M. Dahlfors, S. David, I. Dilmann, R. Dolfini, C. Domingo Pardo, W. Dridi, I. Duran, C. Eleftheriadis, M. Embid Segura, L. Ferrant, A. Ferrari, R. Ferreira Marques, L. Fritzpatrick, H. Frais Koelbl, K. Fujii, W. Furman, I. Goncalves, E. Gonzalez Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, C. Guerrero, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera Martinez, M. Igashira, S. Isaev, E. Jericha, F. Kappeler, Y. Kadi, D. Karadimos, D. Karamanis, M. Kerveno, V. Ketlerov, P. E. Koehler, V. Konovalov, E. Kossionides, M. Krticka, C. Lamboudis, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, J. Marganiec, L. Marques, S. Marrone, P. Mastinu, A. Mengoni, P. M. Milazzo, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O'Brien, M. Oshima, J. Pancin, C. Papachristodoulou, C. Papadopoulos, C. Paradela, N. Patronis, A. Pavlik, P. Pavlopoulos, L. Perrot, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, C. Pretel, J. Quesada, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, L. Sarchiapone, I. Savvidis, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan Got, L. Tavora, R. Terlizzi, P. Vaz, A. Ventura, D. Villamarin, M. Vincente, V. Vlachoudis, R. Vlastou, F. Voss, S. Walter, H. Wendler, M. Wiescher, K. Wisshak, VANNINI, GIANNI, G.Aert, U.Abbondanno, H.Alvarez, F.Alvarez-Velarde, S.Andriamonje, J.Andrzejewski, P.Assimakopoulo, L.Audouin, G.Badurek, P.Baumann, F.Becvar, E. Berthomieux, F. Calvino, D.Cano-Ott, R.Capote, A.Carrillo de Albornoz, P.Cennini, V.Chepel, E.Chiaveri, N.Colonna, G.Corte, A.Couture, J.Cox, M.Dahlfor, S.David, I.Dilmann, R.Dolfini, C.Domingo-Pardo, W.Dridi, I.Duran, C.Eleftheriadi, M.Embid-Segura, L.Ferrant, A.Ferrari, R.Ferreira-Marque, L.Fritzpatrick, H.Frais-Koelbl, K.Fujii, W.Furman, I.Goncalve, E.Gonzalez-Romero, A.Goverdovski, F.Gramegna, E.Griesmayer, C.Guerrero, F.Gunsing, B.Haa, R.Haight, M.Heil, A.Herrera-Martinez, M.Igashira, S.Isaev, E.Jericha, F.Kappeler, Y.Kadi, D.Karadimo, D.Karamani, M.Kerveno, V.Ketlerov, P.E.Koehler, V.Konovalov, E.Kossionide, M.Krticka, C.Lamboudi, H.Leeb, A.Lindote, I.Lope, M.Lozano, S.Lukic, J.Marganiec, L.Marque, S.Marrone, P.Mastinu, A.Mengoni, P.M.Milazzo, C.Moreau, M.Mosconi, F.Neve, H.Oberhummer, S.O'Brien, M.Oshima, J.Pancin, C.Papachristodoulou, C.Papadopoulo, C.Paradela, N.Patroni, A.Pavlik, P.Pavlopoulo, L.Perrot, M.T.Pigni, R.Plag, A.Plompen, A.Pluki, A. Poch, C.Pretel, J.Quesada, T.Rauscher, R.Reifarth, M.Rosetti, C.Rubbia, G.Rudolf, P.Rullhusen, J.Salgado, L.Sarchiapone, I.Savvidi, C.Stephan, G.Tagliente, J.L.Tain, L.Tassan-Got, L.Tavora, R.Terlizzi, G.Vannini, P.Vaz, A.Ventura, D.Villamarin, M.Vincente, V.Vlachoudi, R.Vlastou, F.Vo, S.Walter, H.Wendler, and M.Wiescher and K. Wisshak

Published
2006

35. Measurement of the 151Sm(n,γ) cross section from 0.6 eV to 1 MeV via the neutron time-of-flight technique at the CERN n_TOF facility

Author

S. Marrone, U. Abbondanno, G. Aerts, F. Alvarez Velarde, H. Alvarez Pol, S. Andriamonje, J. Andrzejewski, G. Badurek, P. Baumann, F. Becvar, J. Benlliure, E. Berthomieux, F. Calvino, D. Cano Ott, R. Capote, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, D. Cortina, A. Couture, J. Cox, S. Dababneh, M. Dahlfors, S. David, R. Dolfini, C. Domingo Pardo, I. Duran Escribano, M. Embid Segura, L. Ferrant, A. Ferrari, R. Ferreira Marques, H. Frais Koelbl, K. Fujii, W. I. Furman, R. Gallino, I. Goncalves, E. Gonzalez Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, F. Gunsing, B. Haas, R. Haight, M. Heil, A. Herrera Martinez, S. Isaev, E. Jericha, F. Kappeler, Y. Kadi, D. Karadimos, M. Kerveno, V. Ketlerov, P. E. Koehler, V. Konovalov, M. Krticka, C. Lamboudis, H. Leeb, A. Lindote, M. I. Lopes, M. Lozano, S. Lukic, J. Marganiec, J. Martinez Val, P. F. Mastinu, A. Mengoni, P. M. Milazzo, A. Molina Coballes, C. Moreau, M. Mosconi, F. Neves, H. Oberhummer, S. O'Brien, J. Pancin, T. Papaevangelou, C. Paradela, A. Pavlik, P. Pavlopoulos, J. M. Perlado, L. Perrot, M. Pignatari, M. T. Pigni, R. Plag, A. Plompen, A. Plukis, A. Poch, A. Policarpo, C. Pretel, J. M. Quesada, S. Raman, W. Rapp, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, J. C. Soares, C. Stephan, G. Tagliente, J. L. Tain, L. Tassan Got, L. M. N. Tavora, R. Terlizzi, P. Vaz, A. Ventura, D. Villamarin Fernandez, M. Vincente Vincente, V. Vlachoudis, F. Voss, H. Wendler, M. Wiescher, K. Wisshak, VANNINI, GIANNI, S.Marrone, U.Abbondanno, G. Aert, F.Alvarez-Velarde, H.Alvarez-Pol, S.Andriamonje, J.Andrzejewski, G.Badurek, P.Baumann, F.Becvar, J. Benlliure, E. Berthomieux, F. Calvino, D.Cano-Ott, R.Capote, P.Cennini, V.Chepel, E.Chiaveri, N.Colonna, G.Corte, D.Cortina, A.Couture, J.Cox, S.Dababneh, M.Dahlfor, S.David, R.Dolfini, C.Domingo-Pardo, I.Duran-Escribano, M.Embid-Segura, L.Ferrant, A.Ferrari, R.Ferreira-Marque, H.Frais-Koelbl, K.Fujii, W.I.Furman, R.Gallino, I.Goncalve, E.Gonzalez-Romero, A.Goverdovski, F.Gramegna, E.Griesmayer, F.Gunsing, B.Haa, R.Haight, M.Heil, A.Herrera-Martinez, S.Isaev, E.Jericha, F.Kappeler, Y.Kadi, D.Karadimo, M.Kerveno, V.Ketlerov, P.E.Koehler, V.Konovalov, M.Krticka, C.Lamboudi, H.Leeb, A.Lindote, M.I.Lope, M.Lozano, S.Lukic, J.Marganiec, J.Martinez-Val, P.F.Mastinu, A.Mengoni, P.M.Milazzo, A.Molina-Coballe, C.Moreau, M.Mosconi, F.Neve, H.Oberhummer, S.O'Brien, J.Pancin, T.Papaevangelou, C.Paradela, A.Pavlik, P.Pavlopoulo, J.M.Perlado, L.Perrot, M.Pignatari, M.T.Pigni, R.Plag, A.Plompen, A.Pluki, A. Poch, A.Policarpo, C.Pretel, J.M.Quesada, S.Raman, W.Rapp, T.Rauscher, R.Reifarth, M.Rosetti, C.Rubbia, G.Rudolf, P.Rullhusen, J.Salgado, J.C.Soare, C.Stephan, G.Tagliente, J.L.Tain, L.Tassan-Got, L.M.N.Tavora, R.Terlizzi, G.Vannini, P.Vaz, A.Ventura, D.Villamarin-Fernandez, M.Vincente-Vincente, V.Vlachoudi, F.Vo, H.Wendler, and M.Wiescher and K. Wisshak

Published
2006

36. Measurement of the Coherent Neutron Scattering Length of (3) He

Author

Werner Heil, G. Badurek, M. Baron, Helmut Rauch, W. Ketter, and Rudolf Loidl

Subjects
Physics, business.industry, General Engineering, Phase (waves), Neutron scattering, elastic neutron scattering, neutron interferometry, properties of the 3He nucleus, Article, Computational physics, Scattering amplitude, Interferometry, Optics, Perfect crystal, NIST, Neutron, real part of the coherent scattering length, business, Refractive index, few body systems
Abstract

By means of neutron interferometry the s-wave neutron scattering length of the (3)He nucleus was re-measured at the Institut Laue-Langevin (ILL). Using a skew symmetrical perfect crystal Si-interferometer and a linear twin chamber cell, false phase shifts due to sample misalignment were reduced to a negligible level. Simulation calculations suggest an asymmetrically alternating measuring sequence in order to compensate for systematic errors caused by thermal phase drifts. There is evidence in the experiment's data that this procedure is indeed effective. The neutron refractive index in terms of Sears' exact expression for the scattering amplitude has been analyzed in order to evaluate the measured phase shifts. The result of our measurement, b' c = (6.000 ± 0.009) fm, shows a deviation towards a greater value compared to the presently accepted value of b' c = (5.74 ± 0.07) fm, confirming the observation of the partner experiment at NIST. On the other hand, the results of both precision measurements at NIST and ILL exhibit a serious 12σ (12 standard uncertainties) deviation, the reason for which is not clear yet.

Published
2004

37. Measurement of the n-TOF beam profile with a micromegas detector

Author

J. Pancin, U. Abbondanno, G. Aerts, H. Alvarez, S. Andriamonje, A. Angelopoulos, P. Assimakopoulos, C. Bacri, G. Badurek, P. Baumann, F. Bečvář, H. Beer, J. Benlliure, B. Berthier, E. Berthoumieux, S. Boffi, C. Borcea, E. Boscolo-Marchi, N. Bustreo, F. Calvino, D. Cano-ott, R. Capote, P. Carlson, P. Cennini, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, D. Cortina, A. Couture, J. Cox, S. Dababneh, M. Dahlfors, S. David, A. Delbart, J. Derre, R. Dolfini, C. Domingo, I. Duran-Escribano, C. Eleftheriadis, M. Embid-Segura, L. Ferrant, A. Ferrari, L. Ferreira-Lourenco, R. Ferreiramarques, H. Frais-Koelbl, W. Furman, Y. Giomataris, I. Goncalves, E. Gonzalez-Romero, A. Goverdovski, F. Gramegna, E. Griesmayer, F. Gunsing, R. Haight, M. Heil, A. Herrera-Martinez, K. Ioannides, N. Janeva, F. Jeanneau, E. Jericha, F. Käppeler, Y. Kadi, D. Karamanis, A. Kelic, V. Ketlerov, G. Kitis, P. Koehler, V. Konovalov, E. Kossionides, V. Lacoste, H. Leeb, A. Lindote, I. Lopes, M. Lozano, S. Lukic, S. Markov, S. Marrone, J. Martinez-Val, P. Mastinu, A. Mengoni, P. Milazzo, E. Minguez, A. Molina-Coballes, C. Moreau, F. Neves, H. Oberhummer, S. O'brien, I. Papadopoulos, T. Papavengelou, C. Paradela, A. Pavlik, P. Pavlopoulos, A. Perez-Parra, J. Perlado, V. Peskov, L. Perrot, R. Plag, A. Plompen, A. Plukis, A. Poch, A. Policarpo, C. Pretel, J. Quesada, M. Radici, S. Raman, W. Rapp, R. Reifarth, F. Rejmund, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusen, J. Salgado, E. Savvidis, C. Stephan, G. Tagliente, J. Tain, C. Tapia, L. Tassan-Got, L. Tavora, R. Terlizzi, M. Terrani, N. Tsangas, G. Vannini, P. Vaz, A. Ventura, D. Villamarin-Fernandez, M. Vincente-Vincente, V. Vlachoudis, R. Vlastou, F. Voss, H. Wendler, M. Wiescher, K. Wisshak, L. Zanini, J.Pancin, U.Abbondanno, G.Aert, H.Alvarez, S.Adriamonje, A.Angelopoulo, P.Assimakopoulo, C.Bacri, C.Badurek, P.Bauman, F.Becvar, H.Beer, J.Benlliure, B.Berthier, E.Berthoumieux, S.Boffi, C.Borcea, N.Bustreo, F.Calvino, D.Cano-Ott, R.Capote, P.Carlson, P.Cennini, V.Chepel, E.Chiaveri, N.Colonna, G.Corte, D.Cortina, A.Couture, J.Cox, S.Dababneh, M.Dahlfor, S.David, R.Dolfini, C.Domingo, I.Dura-Escribano, C.Eleftheriadi, M.Embid-Segura, L.Ferrant, A.Ferrari, L.Ferreira-Lourenco, R.Ferreira-Marque, H.Frais-Koelbl, W.Furman, Y.Giomatari, I.Goncalve, E.Gonzales-Romero, A.Goverdovski, F.Gramegna, E.Griiesmayer, F.GGunsing, R.Haight, M.Heil, A.Errera-Martinez, K.Ioannide, N.Janeva, E.Jericha, Y.Kadi, F.Kappeler, D.Karamani, A.Kelic, V.Ketlerov, G.Kiti, P.Koehler, V.Konovalov, E.Kossionide, V.Lacoste, H.Leeb, A.Lindote, I.Lope, M.Lozano, S.Lukic, S.Markov, S.Marrone, J.Martinez-Val, P.Mastinu, A.Mengoni, P.Milazzo, E.Minguez, C.Moreau, F.Neve, H.Oberhummer, S.O’Brien, C.Paradela, A.Pavlik, P.Pavlopoulo, A.Perez-Parra, J.Perlado, L.Perrot, V.Peskov, R.Plag, A.Plomplen, A.Pluki, A.Poch, A.policarpo, C.Pretel, J.Quesada, M.Radici, W.Rapp, R.Reifarth, F.Rejmund, M.Rosetti, C.Rubbia, G.Rudolf, P.Rullhusen, J.Salgado, E.Savvidi, C.Stephan, G.Tagliente, J.Tain, C.Tapia, L.Tassan-Got, L.Tavora, M.Terrani, N.Tsanga, G.Vannini, P.Vaz, A.Ventura, D.Villamarin-Fernandez, M.Vincente-Vincente, V.Vlachoudi, R.Vlastou, F.Vo, H.Wendler, M.Wiescher, K.Wisshak, and L.Zanini

Subjects
Elastic scattering, Physics, Nuclear and High Energy Physics, Argon, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Beam profile, Nuclear Theory, chemistry.chemical_element, MicroMegas detector, NUCLEAR PHYSICS, Neutron radiation, Nuclear physics, Neutron capture, chemistry, NEUTRON BEAMS, Neutron cross section, MICROMEGAS DETECTOR, Neutron detection, Neutron beam profiler, Neutron, Nuclear Experiment, Instrumentation, Micromegas
Abstract

A Micromegas detector was used in the neutron Time-Of-Flight (n_TOF) facility at CERN to evaluate the spatial distribution of the neutron beam as a function of its kinetic energy. This was achieved over a large range of neutron energies by using two complementary processes: at low energy by capture of a neutron via the 6Li(n,[alpha])t reaction, and at high energy by elastic scattering of neutrons on gas nuclei (argon+isobutane or helium+isobutane). Data are compared to Monte Carlo simulations and an analytic function fitting the beam profile has been calculated with a sufficient precision to use in neutron capture experiments at the n_TOF facility. http://www.sciencedirect.com/science/article/B6TJM-4BRSWVV-3/1/01dd54d28c7a57560574f1adfbd8a2f0

Published
2004

38. Neutron Interferometric Experiments on Quantum Mechanics

Author

G. Badurek

Subjects
Josephson effect, Physics, Superposition principle, Classical mechanics, Field (physics), Geometric phase, Quantum mechanics, Neutron, Matter wave, Wave function, Spin-½
Abstract

Since its invention in 1974 [1] neutron interferometry has been established as an almost ideal tool to test fundamental principles of quantum mechanics with massive particles on a macroscopic space-time scale. After a brief introduction into the basic principles of perfect crystal neutron interferometry some selected topics are reviewed which our group could contribute to this active and still growing field of research, ranging from experimental verification of the 47π period of spinor wave functions, demonstration of the quantum mechanical principle of linear superposition of states, macroscopic quantum beating of the neutron wave function (the neutron analogue of the AC Josephson effect), elucidation of the difference between probabilistic and deterministic absorption of matter waves to interferometric measurements of geometric phases. Additionally we report on the recently performed first successful verification of the topological nature of the scalar Aharonov-Bohm effect by means of neutron spin precession, which represents an alternative version of neutron interference [2].

Published
1997

39. Editorial

Author

G BADUREK, M JEITLER, M KRAMMER, and M REGLER

Subjects
Nuclear and High Energy Physics, Instrumentation
Published
2004

40. Editorial

Author

G. Badurek, J. Hrubec, M. Jeitler, M. Krammer, and M. Regler

Subjects
Nuclear and High Energy Physics, Instrumentation
Published
2007

42. A pulsed field neutron diffractometer for studying field-induced phase transitions

Author

G. Badurek, R. Grössinger, and S. Rader

Subjects
Phase transition, Materials science, Field (physics), Condensed matter physics, business.industry, Neutron diffraction, Field dependence, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Optics, Antiferromagnetism, business, Spin (physics), Single crystal, Critical field
Abstract

A pulsed field neutron diffractometer is described which allows to study the field dependent phase transition of antiferromagnetic samples within a few milliseconds in a ‘single-shot’ experiment. Its proper operation is demonstrated at a MnF 2 single crystal whose antiparallel spin alignment is broken up at a critical field of 9.3 T at 4.2 K.

Published
1995

43. Neutron Magnetic Tomography: A Feasibility Study

Author

G. Badurek, H. Leeb, A Schricker, R.J Buchelt, and M. Hochhold

Subjects
Physics, Magnetic structure, Numerical analysis, Quantum mechanics, General Physics and Astronomy, Neutron, Tomography, Computational physics, Visualization
Abstract

Neutron magnetic tomography, the recently proposed extension of the neutron depolarisation technique, is considered. The available numerical methods for the analysis of the data are reviewed and the possibility of visualising the magnetic structure within bulk materials is demonstrated by specific examples. Various ways to implement the method experimentally are presented. Estimates of the feasibility in terms of required measuring time indicate that visualisation is within experimental reach with modern neutron optical devices.

Published
1998

44. The magnetic energy surface of cobalt precipitates in copper determined by time-resolved neutron depolarization

Author

G. Badurek, H. Weinfurter, A. Veider, and K. Stierstadt

Subjects
Magnetic energy, Condensed matter physics, Chemistry, Scattering, General Chemical Engineering, General Physics and Astronomy, chemistry.chemical_element, Condensed Matter::Materials Science, Magnetization, Magnetic anisotropy, Ferromagnetism, Neutron, Cobalt, Superparamagnetism
Abstract

The superparamagnetic relaxation behaviour of Cu—1at.% Co single crystals has been investigated by means of time-resolved three-dimensional neutron depolarization analysis. In these alloys cobalt appears in the form of ferromagnetic monodomain precipitates with a mean radius of about 10 nm embedded in the f.c.c. copper matrix. The octahedral shape of the particles due to elastic stresses between the coherent cobalt and copper lattices was slightly elongated in the [001] direction, by applying a magnetic field during annealing. The resulting superposition of cubic crystalline and uniaxial shape anisotropy gives rise to a characteristic dependence on crystallographic direction of the relaxation of the specimen magnetization after sudden removal of an external magnetic field. The main features of the shape of the energy surface could be deduced from the measurements, and bounds for the elongation of the particles could be obtained. The results complete former neutron small-angle scattering studies o...

Published
1988

45. A new type of spin-flip chopper for polarized neutron beams

Author

G.P. Westphal and G. Badurek

Subjects
Physics, business.industry, Transistor, General Medicine, Magnetic field, law.invention, Chopper, Nuclear magnetic resonance, Optics, law, Electromagnetic coil, Constant current, Neutron, Radio frequency, business, Electronic circuit
Abstract

A spin-flip chopper for polarized neutron beams has been developed, needing less electronic equipment and offering better time resolution than radio frequency chopper systems. Flipping is achieved by static magnetic fields only, which are set up by two coils of extremely low inductivity and can be pulsed within 2–3 μs by simple and reliable transistor switches, working in constant current mode. The effective switching length of the spin reversal device, being responsible for the flight path uncertainty, is reduced to the thickness of a single coil, which is only 0.65 cm, by delayed switching of the second coil according to the neutron transmission time through the first one. Neutron burst of 5 μs duration and a repetition rate of 100 kHz could be obtained with this chopper.

Published
1975

46. Observation of the neutron magnetic resonance energy shift

Author

G. Badurek, B. Alefeld, and Helmut Rauch

Subjects
Physics, Zeeman effect, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Condensed Matter Physics, Polarization (waves), Neutron temperature, Electronic, Optical and Magnetic Materials, Nuclear physics, symbols.namesake, Energy interval, Energy shift, symbols, Neutron cross section, Neutron, Nuclear Experiment
Abstract

Using a high resolution backscattering instrument the energy shift caused by the Zeeman splitting and the inelasticity of the interaction of neutrons with a neutron magnetic resonance system could be observed. Various applications concerning the realization of a dynamical neutron polarization system, the pumping of neutrons into a certain energy interval and the production and handling of ultra cold neutrons are discussed.

Published
1981

47. On the rotational motion of the ammonium ion in the CsCl‐type phase of NH4Br: Results from quasielastic neutron scattering

Author

H. Hervet, F. Volino, A.J. Dianoux, G. Badurek, and R.E. Lechner

Subjects
Elastic scattering, Arrhenius equation, Scattering, Chemistry, Neutron diffraction, General Physics and Astronomy, Activation energy, Neutron scattering, Small-angle neutron scattering, Crystallography, symbols.namesake, Quasielastic neutron scattering, symbols, Physical and Theoretical Chemistry, Atomic physics
Abstract

The rotational motion of the ammonium ion in polycrystalline NH4Br has been investigated by quasielastic incoherent neutron scattering at 12 different temperatures between 297 and 409 K. The measured spectra were corrected for multiple scattering and compared to the C4‐rotational jump model. The elastic incoherent structure factor was determined experimentally within the range 0.15⩽Q⩽1.72 A−1 of elastic wave vector transfer. It yields a N‐H bond length of 1.028±0.005 A. The rotational jump rate was found to follow an Arrhenius law, 1 τC4[s−1] ±0.16)×1013 exp{(−1623±16)/T[K]}, with an activation energy of Ea=13.49±0.13 kJ/mole. Within the studied temperature interval the mean square hydrogen vibration amplitude can be described by the expression 〈u2〉 [A2−]±1.6)×10−4 T[K] −(16.4±6)×10−2.

Published
1980

48. Inelastic neutron scattering study of the rotational potential of NH4 + in (NH4)2PdCl4 and (NH4)2PtCl4

Author

G Badurek and M Prager

Subjects
Physics, General Engineering, General Physics and Astronomy, Crystal structure, Atomic physics, Condensed Matter Physics, Rotation, Inelastic neutron scattering
Abstract

A consistent description of the rotational excitations in (NH4)2PdCl4 and (NH4)2PtCl4 is given in the model of a one-dimensional rotation in a nearly fourfold rotational potential, which is supported by the crystal structure. In such a potential, large tunnel splittings are combined with high-lying librations and moderate activation energies. The estimated model potentials are V( phi )=70 cos 4 phi +0.0004 cos 2 phi (meV) for (NH4)2PdCl4 and V( phi )=66 cos 4 phi +0.0008 cos 2 phi (meV) for (NH4)2PtCl4.

Published
1986

50. Optical and neutron domain structure studies of amorphous ribbons

Author

A. Veider, Roland Grössinger, G. Badurek, and Helmut Kronmüller

Subjects
Materials science, Amorphous metal, Condensed matter physics, Magnetic domain, business.industry, Magnetostriction, Depolarization, Domain model, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Amorphous solid, Condensed Matter::Materials Science, Optics, Domain (ring theory), Neutron, business
Abstract

The domain configuration of amorphous ribbons with positive, vanishing and negative magnetostriction constant λ s has been investigated by means of the longitudinal magneto-optical Kerr-effect and a three-dimensional neutron depolarization analysis. The influence of an external tensile stress on the domain arrangement depends on the sign and the magnitude of the magnetostriction constant and could be measured quantitatively in the depolarization experiment. With the aid of the optical observations domain models have been established; these models were tested and completed by means of an analytic calculation of the corresponding depolarization matrix and a comparison with experimental data. Domain reorientation processes within the ribbons under an imposed tensile stress were found to agree with theoretical predictions. The nearly nonmagnetostrictive alloys shows neither stripe domains nor simple wide domains but a more complicated structure with several layers of domains.

Published
1986

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