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451. Measurements at n_TOF of the neutron capture cross section of minor actinides relevant to the nuclear waste transmutation

Author: M. Oshima, J. Andrzejewski, M. Krtička, Alfredo Ferrari, F. Calviño, Carlo Rubbia, G. Aerts, V. Vlachoudis, Corrie S. Moreau, R. Ferreira-Marques, V. Chepel, G. Rudolf, S. Lukic, L. Tavora, K. Wisshak, A. Pavlik, C. Domingo-Pardo, V. Konovalov, J. Salgado, A. Poch, P. Baumann, P. Rullhusen, S. Andriamonje, G. Vannini, F. Voss, H. Wendler, Carlos Guerrero, E. Chiaveri, P. F. Mastinu, Isabel Lopes, A. J. M. Plompen, E. Jericha, A. Herrera-Martinez, N. Patronis, E. Griesmayer, Yacine Kadi, H. Leeb, R. C. Haight, N. Colonna, U. Abbondanno, Heinz Oberhummer, Alberto Mengoni, James L. Cox, R. Gallino, F. Gramegna, L. Perrot, C. Paradela, F. Bečvář, S. David, D. Karamanis, L. Audouin, T. Papaevangelou, G. Cortes, G. Tagliente, Ralf Plag, J. Benlliure, J. Pancin, A. Carillo de Albornoz, Michael Wiescher, Michael Heil, C. Stephan, F. Gunsing, Masayuki Igashira, D. Cano-Ott, F. Neves, P. M. Milazzo, A. Plukis, P. E. Koehler, Roberto Capote, H. Frais-Koelbl, W.I. Furman, P.A. Assimakopoulos, J. Marganiec, R. Vlastou, A. Goverdovski, I. Duran, Georgios Perdikakis, E. Kossionides, E. Berthoumieux, F. Alvarez-Velarde, M. C. Vincente, C. A. Papachristodoulou, L. Sarchiapone, Gerald Badurek, S. Isaev, R. Dolfini, P. Cennini, M. Mosconi, A. Lindote, S. O'Brien, R. Terlizzi, A. Ventura, P. Vaz, Aaron Couture, C. T. Papadopoulos, B. Haas, L. Ferrant, Isabel S. Gonçalves, S. Marrone, L. Fitzpatrick, H. Álvarez, C. Lamboudis, J. L. Tain, M. Embid-Segura, D. Villamarin, M. Kerveno, W. Dridi, D. Cortina, Manuel Lozano, Rene Reifarth, J. M. Quesada, L. Tassan-Got, P. Pavlopoulos, L. Marques, K. Fujii, M. Rosetti, C. Pretel, V. Ketlerov, Thomas Rauscher, D. Karadimos, E. González-Romero, F. Käppeler, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, European Commission 5th Framework Programme, 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), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-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), and nTOF
Subjects: Materials science, Nuclear transmutation, 010308 nuclear & particles physics, Nuclear engineering, Radioactive waste, chemistry.chemical_element, Americium, 25.40.Lw, 28.20.-v, 28.41.Kw, 27.90.+b, 28.41.Ak, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Calorimeter, Plutonium, chemistry, Neutron flux, 0103 physical sciences, Neutron cross section, Neutron, 010306 general physics
Abstract: Accurate and reliable neutron-capture cross-section data for actinides are necessary for the proper design, safety regulation, and precise performance assessment of transmutation devices such as Fast Critical Reactors or Accelerator Driven Systems. In particular, the neutron-capture cross sections of 237Np, 240Pu, and 243Am play a key role in the design and optimization of a strategy for the Nuclear Waste Transmutation. The listed cross sections have been measured in 2004 at n_TOF with a high accuracy due to a combination of features unique in the world: high instantaneous neutron fluence and excellent energy resolution of the n_TOF facility, innovative Data Acquisition System based on flash ADCs, and the use of a high-performance BaF2 Total Absorption Calorimeter as a detection device. European Commission 5th Framework Programme FIKW-CT-2000-00107
Published: 2005
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452. Neutron Capture Cross Section Measurement ofSm151at the CERN Neutron Time of Flight Facility (n_TOF)

Author: I. Goncalves, C. Lamboudis, J. L. Tain, Thomas Rauscher, L. Tavora, M. Embid-Segura, D. Karadimos, Rene Reifarth, D. Cortina, Manuel Lozano, A.J.P.L. Policarpo, José M. Martínez-Val, F. Gramegna, P. Pavlopoulos, P. Rullhusen, J. Andrzejewski, M. Kerveno, F. Käppeler, M. Krtička, T. Papaevangelou, J. M. Quesada, Carlo Rubbia, A. Pavlik, José Manuel Perlado, L. Ferrant, Heinz Oberhummer, G. Cortes, C. Domingo-Pardo, V. Vlachoudis, Saed Dababneh, M. Rosetti, V. Konovalov, F. Voss, W.I. Furman, Alfredo Ferrari, R. Ferreira-Marques, Nicola Colonna, E. Gonzalez-Romero, S. Marrone, H. Alvarez-Pol, A. Plukis, A. Lindote, Subramanian Raman, J. Pancin, R. Gallino, J. Cox, C. Paradela, G. Aerts, V. Ketlerov, J. Marganiec, E. Griesmayer, P. M. Milazzo, E. Chiaveri, Laurent Tassan-Got, S. Lukic, S. Andriamonje, D. Cano-Ott, Michael Heil, P. F. Mastinu, Marco Pignatari, Roberto Capote, Ralf Plag, J. Benlliure, W. Rapp, H. Frais-Koelbl, M. Dahlfors, P. Vaz, Alberto Ventura, Aaron Couture, C. Pretel, F. Neves, E. Jericha, I. Duran, D. Villamarin, P. E. Koehler, E. Berthoumieux, A. Herrera-Martinez, R. C. Haight, Alberto Mengoni, A. Molina-Coballes, G. Vannini, F. Bečvář, L. Perrot, S. David, G. Tagliente, V. Chepel, J. Salgado, A. Poch, P. Baumann, Michael Wiescher, Yacine Kadi, C. Moreau, M. C. Vincente, J.C. Soares, S. Isaev, U. Abbondanno, F. Gunsing, A. J. M. Plompen, G. Rudolf, I. Lopes, P. Cennini, K. Wisshak, A. Goverdovski, F. Alvarez-Velarde, Gerald Badurek, R. Dolfini, M. Mosconi, C. Stephan, S. O'Brien, R. Terlizzi, H. Wendler, F. Calviño, H. Leeb, and B. Haas
Subjects: Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, General Physics and Astronomy, 01 natural sciences, 7. Clean energy, Nuclear physics, Neutron capture, Time of flight, Nucleosynthesis, 0103 physical sciences, Neutron cross section, Spallation, Neutron, Nuclear Experiment, 010306 general physics, s-process
Abstract: The Sm-151(n,gamma)Sm-152 cross section has been measured at the spallation neutron facility n_TOF at CERN in the energy range from 1 eV to 1 MeV. The new facility combines excellent resolution in neutron time-of-flight, low repetition rates, and an unsurpassed instantaneous luminosity, resulting in rather favorable signal/background ratios. The Sm-151 cross section is of importance for characterizing neutron capture nucleosynthesis in asymptotic giant branch stars. At a thermal energy of kT=30 keV the Maxwellian averaged cross section of this unstable isotope (t(1/2)=93 yr) was determined to be 3100+/-160 mb, significantly larger than theoretical predictions.
Published: 2004
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453. Measurement of the $^{232}$Th Neutron Capture Cross Section at the CERN n_TOF Facility

Author: Aerts, G., Abbondanno, U., Álvarez, H., Alvarez-Velarde, F., Andriamonje, S., Mosconi, M., Mengoni, A., Heil, M., Käppeler, F., Terlizzi, R., Furman, W., Ketlerov, V., Goverdovski, A., Konovalov, V., Andrzejewski, J., Assimakopoulos, P., Audouin, L., Badurek, G., Baumann, P., Becvár, F., Benlliure, J., Berthoumieux, E., Calviño, F., Cano-Ott, D., Capote, R., Carrillo De Albornoz, A., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., David, S., Dolfini, R., Domingo-Pardo, C., Dridi, W., Duran, I., Embid-Segura, M., Ferrant, L., Ferrari, Anthony, Ferreira-Marques, R., Fitzpatrick, L., Frais-Kölbl, H., Fujii, K., Guerrero, C., Goncalves, I., Gallino, R., Gonzalez-Romero, E., Gramegna, F., Griesmayer, E., Gunsing, F., Haas, B., Haight, R., Herrera-Martinez, A., Igashira, M., Isaev, S., Jericha, E., Kadi, Y., Karamanis, D., Karadimos, D., Kerveno, M., Koehler, P., Kolokolov, D., Kossionides, E., Krticka, M., Lamboudis, C., Leeb, H., Lindote, A., Lopes, I., Lozano, M., Lukic, S., Marganiec, J., Marques, L., Marrone, S., Mastinu, P., M. Milazzo, P., Moreau, C., Neves, F., Oberhummer, H., O'Brien, S., Oshima, M., Pancin, J., Papachristodoulou, C., Papadopoulos, C., Paradela, C., Patronis, N., Pavlik, A., Pavlopoulos, P., Perrot, L., Plag, R., Plompen, A., Plukis, A., Poch, A., Pretel, C., Quesada, J., Rauscher, T., Reifarth, R., Rosetti, M., Rubbia, C., Rudolf, G., Rullhusen, P., Salgado, J., Sarchiapone, L., Stephan, C., Tagliente, G., L. Tain, J., Tassan-Got, L., Tavora, L., Vannini, G., Vaz, P., Ventura, A., Villamarin, D., C. Vincente, M., Vlachoudis, V., Vlastou, R., Voss, F., Wendler, H., Wiescher, M., Wisshak, K., 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), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-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), and nTOF
Subjects: Mass number, Curium, 25.40.Lw, 27.90.+b, Nuclear Theory, Thorium, chemistry.chemical_element, 020206 networking & telecommunications, Americium, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, Nuclear physics, chemistry, 0202 electrical engineering, electronic engineering, information engineering, Neutron cross section, Plutonium-241, 020201 artificial intelligence & image processing, Neutron, Nuclear Experiment, Isotopes of thorium
Abstract: PACS; International audience; The use of a fuel cycle based on 232Th can substantially reduce the radiotoxicity of the produced nuclear waste since the lower atomic and mass number of thorium results in a strongly suppressed build-up of the higher actinides and especially americium and curium. The design and realization of nuclear power stations based on the use of thorium, either in a critical or subcritical system, require an accurate knowledge of the 232Th(n,gamma) reaction cross section. We have measured the neutron capture cross section of 232Th at the recently constructed neutron time-of-flight facility n_TOF at CERN in the energy range from 1 eV to 1 MeV. In the resolved resonance region, the resonance parameters have been extracted. In the unresolved resonance region, the neutron capture cross section is given as point-wise data. ©2005 American Institute of Physics
Published: 2004
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454. The n_TOF Facility at CERN: performances and first physics results

Author: Abbondanno, U., Aerts, G., Álvarez, H., Alvarez-Velarde, F., Andriamonje, S., Mosconi, M., Mengoni, A., Heil, M., Käppeler, F., Terlizzi, R., Furman, W., Ketlerov, V., Goverdovski, A., Konovalov, V., Andrzejewski, J., Assimakopoulos, P., Audouin, L., Badurek, G., Baumann, P., Becvár, F., Benlliure, J., Berthoumieux, E., Calviño, F., Cano-Ott, D., Capote, R., Carrillo De Albornoz, A., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., David, S., Dolfini, R., Domingo-Pardo, C., Dridi, W., Duran, I., Embid-Segura, M., Ferrant, L., Ferrari, Anthony, Ferreira-Marques, R., Fitzpatrick, L., Frais-Kölbl, H., Fujii, K., Guerrero, C., Goncalves, I., Gallino, R., Gonzalez-Romero, E., Gramegna, F., Griesmayer, E., Gunsing, F., Haas, B., Haight, R., Herrera-Martinez, A., Igashira, M., Isaev, S., Jericha, E., Kadi, Y., Karamanis, D., Karadimos, D., Kerveno, M., Koehler, P., Kolokolov, D., Kossionides, E., Krticka, M., Lamboudis, C., Leeb, H., Lindote, A., Lopes, I., Lozano, M., Lukic, S., Marganiec, J., Marques, L., Marrone, S., Mastinu, P., M. Milazzo, P., Moreau, C., Neves, F., Oberhummer, H., O'Brien, S., Oshima, M., Pancin, J., Papachristodoulou, C., Papadopoulos, C., Paradela, C., Patronis, N., Pavlik, A., Pavlopoulos, P., Perrot, L., Plag, R., Plompen, A., Plukis, A., Poch, A., Pretel, C., Quesada, J., Rauscher, T., Reifarth, R., Rosetti, M., Rubbia, C., Rudolf, G., Rullhusen, P., Salgado, J., Sarchiapone, L., Stéphan, C., Tagliente, G., L. Tain, J., Tassan-Got, L., Tavora, L., Vannini, G., Vaz, P., Ventura, A., Villamarin, D., C. Vincente, M., Vlachoudis, V., Vlastou, R., Voss, F., Wendler, H., Wiescher, M., Wisshak, K., 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), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-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), nTOF, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, and European Commission’s 5th Framework programme
Subjects: Physics, Large Hadron Collider, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, Flux, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, 29.30.Hs, Neutron spectroscopy, Nuclear physics, Time of flight, Duty cycle, Neutron flux, Computer Science::Systems and Control, 0103 physical sciences, Physics::Accelerator Physics, Spallation, Neutron, 010306 general physics, Nuclear Experiment
Abstract: The neutron Time of Flight (n_TOF) facility at CERN is a source of a wide-range (1 eV
Published: 2004
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455. The TRADE Experiment: Status of the Project and Physics of the Spallation Target

Author: Monti, S., Rubbia, C., Salvatores, M., Burgio, N., Carta, M., Agostini, P., Pisacane, F., Santagata, A., Krakowiak-Aillaud, C., Kadi, Y., Pitcher, E., Steckmeyer, J.C., Broeders, C., Struwe, D., Herrera-Martinez, A., Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), M. Salvatores, Y. Chang, and Guesnon, Sandrine
Subjects: [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published: 2004

456. Time-energy relation of the n_TOF neutron beam: Energy standards revisited

Author: Lorusso, G. Colonna, N. Marrone, S. Tagliente, G. Heil, M. Cano-Ott, D. Mosconi, M. Moreau, C. Mengoni, A. Abbondanno, U. Aerts, G. Alvarez-Pol, H. Alvarez-Velarde, F. Andriamonje, S. Andrzejewski, J. Angelopoulos, A. Assimakopoulos, P. Badurek, G. Baumann, P. Bečvár, F. Benlliure, J. Berthomieux, E. Bisceglie, E. Calviño, P. Capote, R. Cennini, P. Chepel, V. Chiaveri, E. Coceva, C. Cortes, G. Cortina, D. Couture, A. Cox, J. Dababneh, S. Dahlfors, M. David, S. Dolfini, R. Domingo-Pardo, C. Duran, I. Eleftheriadis, C. Embid-Segura, M. Ferrant, L. Ferrari, A. Ferreira-Marques, R. Frais-Koelbl, H. Furman, W.I. Goncalves, I.F. Gonzalez-Romero, E. Goverdovski, A. Gramegna, F. Griesmayer, E. Gunsing, F. Haas, B. Haight, R. Herrera-Martinez, A. Ioannides, K.G. Isaev, S. Jericha, E. Käppeler, F. Kadi, Y. Karamanis, D. Ketlerov, V. Kitis, G. Koehler, P.E. Konovalov, V. Kossionides, E. Krticka, M. Leeb, H. Lindote, A. Lopes, M.I. Lozano, M. Lukic, S. Marganiec, J. Mastinu, P.F. Milazzo, P.M. Molina-Coballes, A. Neves, F. Oberhummer, H. O'Brien, S. Pancin, J. Paradela, C. Pavlik, A. Pavlopoulos, P. Perrot, L. Peskov, V. Plag, R. Plompen, A. Plukis, A. Poch, A. Policarpo, A. Pretel, C. Quesada, J.M. Rapp, W. Rauscher, T. Reifarth, R. Rosetti, M. Rubbia, C. Rudolf, G. Rullhusen, P. Salgado, J. Savvidis, E. Soares, J.C. Stephan, C. Tain, J.L. Tassan-Got, L. Tavora, L.M.N. Terlizzi, R. Tsangas, N. Vannini, G. Vaz, P. Ventura, A. Villamarin, D. Vincente, M.C. Vlachoudis, V. Vlastou, R. Voss, F. Wendler, H. Wiescher, M. Wisshak, K.
Subjects: Physics::Accelerator Physics, Nuclear Experiment
Abstract: The accurate determination of neutron cross-sections as a function of the neutron energy at a time-of-flight facility requires a precise knowledge of the time-energy relation for the neutron beam. For the n_TOF neutron beam at CERN, produced by spallation of high-energy protons on a Pb target, the time-energy relation is connected to the production mechanism and to the subsequent moderation process. A calibration of the neutron energy scale is proposed based on detailed Monte Carlo simulations of the facility. This time-energy relation has been experimentally validated by means of dedicated measurements of standard energy resonances, from 1eV to approximately 1MeV. On the basis of the present measurements, it is proposed to correct the energy of the 1.3eV resonance of 193Ir, which is commonly considered as an energy standard. © 2004 Elsevier B.V. All rights reserved.
Published: 2004

457. Measurement of the n_TOF beam profile with a micromegas detector

Author: Pancin, J. Abbondanno, U. Aerts, G. Alvarez, H. Andriamonje, S. Angelopoulos, A. Assimakopoulos, P. Bacri, C. Badurek, G. Baumann, P. Bečvář, F. Beer, H. Benlliure, J. Berthier, B. Berthoumieux, E. Boffi, S. Borcea, C. Boscolo-Marchi, E. Bustreo, N. Calvino, F. Cano-ott, D. Capote, R. Carlson, P. Cennini, P. Chepel, V. Chiaveri, E. Colonna, N. Cortes, G. Cortina, D. Couture, A. Cox, J. Dababneh, S. Dahlfors, M. David, S. Delbart, A. Derre, J. Dolfini, R. Domingo, C. Duran-Escribano, I. Eleftheriadis, C. Embid-Segura, M. Ferrant, L. Ferrari, A. Ferreira-Lourenco, L. Ferreiramarques, R. Frais-Koelbl, H. Furman, W. Giomataris, Y. Goncalves, I. Gonzalez-Romero, E. Goverdovski, A. Gramegna, F. Griesmayer, E. Gunsing, F. Haight, R. Heil, M. Herrera-Martinez, A. Ioannides, K. Janeva, N. Jeanneau, F. Jericha, E. Käppeler, F. Kadi, Y. Karamanis, D. Kelic, A. Ketlerov, V. Kitis, G. Koehler, P. Konovalov, V. Kossionides, E. Lacoste, V. Leeb, H. Lindote, A. Lopes, I. Lozano, M. Lukic, S. Markov, S. Marrone, S. Martinez-Val, J. Mastinu, P. Mengoni, A. Milazzo, P. Minguez, E. Molina-Coballes, A. Moreau, C. Neves, F. Oberhummer, H. O'brien, S. Papadopoulos, I. Papavengelou, T. Paradela, C. Pavlik, A. Pavlopoulos, P. Perez-Parra, A. Perlado, J. Peskov, V. Perrot, L. Peskov, V. Plag, R. Plompen, A. Plukis, A. Poch, A. Policarpo, A. Pretel, C. Quesada, J. Radici, M. Raman, S. Rapp, W. Reifarth, R. Rejmund, F. Rosetti, M. Rubbia, C. Rudolf, G. Rullhusen, P. Salgado, J. Savvidis, E. Stephan, C. Tagliente, G. Tain, J. Tapia, C. Tassan-Got, L. Tavora, L. Terlizzi, R. Terrani, M. Tsangas, N. Vannini, G. Vaz, P. Ventura, A. Villamarin-Fernandez, D. Vincente-Vincente, M. Vlachoudis, V. Vlastou, R. Voss, F. Wendler, H. Wiescher, M. Wisshak, K. Zanini, L.
Subjects: Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Nuclear Experiment
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,α)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. © 2004 Elsevier B.V. All rights reserved.
Published: 2004

458. Measurement of the n_TOF beam profile with a micromegas detector

Author: Pancin, J., Abbondanno, U., Aerts, G., Alvarez, H., Andriamonje, S., Angelopoulos, A., Assimakopoulos, P., Bacri, C.O., Badurek, G., Baumann, P., Becvar, F., Beer, H., Benlliure, J., Berthier, B., Berthoumieux, E., Boffi, S., Borcea, C., Boscolo-Marchi, E., Bustreo, N., Calvino, F., Cano-Ott, D., Capote, R., Carlson, P., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., Dababneh, S., Dahlfors, M., David, S., Delbart, A., Derre, J., Dolfini, R., Domingo, C., Duran-Escribano, I., Eleftheriadis, C., Embid-Segura, M., Ferrant, L., Ferrari, Anthony, Ferreira-Lourenco, L., Ferreiramarques, R., Frais-Koelbl, H., Furman, W., Giomataris, Y., Goncalves, I., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haight, R., Heil, M., Herrera-Martinez, A., Ioannides, K., Janeva, N., Jeanneau, F., Jericha, E., Kaeppeler, F., Kadi, Y., Karamanis, D., Kelic, A., Ketlerov, V., Kitis, G., Koehler, P., Konovalov, V., Kossionides, E., Lacoste, V., Leeb, H., Lindote, A., Lopes, I., Lozano, M., Lukic, S., Markov, S., Marrone, S., Martinez-Val, J., Mastinu, P., Mengoni, A., Milazzo, P., Minguez, E., Molina-Coballes, A., Moreau, C., Neves, F., Oberhummer, H., O'Brien, S., Papadopoulos, I., Papavengelou, T., Paradela, C., Pavlik, A., Pavlopoulos, P., Perez-Parra, A., Perlado, J., Peskov, V., Perrot, L., Lag, R., Plompen, A., Plukis, A., Poch, A., Policarpo, A., Pretel, C., Quesada, J., Radici, M., Raman, S., Rapp, W., Reifarth, R., Rejmund, F., Rosetti, M., Rubbia, C., Rudolf, G., Rullhusen, P., Salgado, J., Savvidis, E., Stephan, C., Tagliente, G., Tain, J., Tapia, C., Tassan-Got, L., Tavora, L., Terlizzi, R., Terrani, M., Tsangas, N., Vannini, G., Vaz, P., Ventura, A., Villamarin-Fernandez, D., Vincente-Vincente, M., Vlachoudis, V., Vlastou, R., Voss, F., Wendler, H., Wiescher, M., Wisshak, K., Zaninini, L., Heyd, Yvette, 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), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and TOF
Subjects: ComputingMethodologies_PATTERNRECOGNITION, TheoryofComputation_COMPUTATIONBYABSTRACTDEVICES, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], TheoryofComputation_GENERAL, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMethodologies_ARTIFICIALINTELLIGENCE
Abstract: PACS
Published: 2004

459. Neutron capture cross section measurement of $^{151}$Sm at the CERN neutron time of flight facility (n_TOF)

Author: Abbondanno, U., Aerts, G., Alvarez-Velarde, F., Alvarez-Pol, H., Andriamonje, S., Andrzejewski, J., Badurek, G., Baumann, P., Becvar, F., Benlliure, J., Berthoumieux, E., Calvino, F., Cano-Ott, D., Capote, R., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., Dababneh, S., Dahlfors, M., David, S., Dolfini, R., Domingo-Pardo, C., Duran, I., Embid-Segura, M., Ferrant, L., Ferrari, Anthony, Ferreira-Marques, R., Frais-Koelbl, H., Furman, W., Goncalves, I., Gallino, R., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haas, B., Haight, R., Heil, M., Herrera-Martinez, A., Isaev, S., Jericha, E., Käppeler, F., Kadi, Y., Kardimos, D., Kerveno, M., Ketlerov, V., Koehler, P., Konovalov, V., Krticka, M., Lamboudis, C., Leeb, H., Lindote, A., Lopes, I., Lozano, M., Lukic, S., Marganiec, J., Marrone, S., Martinez-Val, J., Mastinu, P., Mengoni, A., Milazzo, P.M., Molina-Coballes, A., Moreau, C., Mosconi, M., Neves, F., Oberhummer, H., O'Brien, S., Pancin, J., Papaevangelou, T., Paradela, C., Pavlik, A., Pavlopoulos, P., Perlado, J.M., Perrot, L., Pignatari, M., Plag, R., Plompen, A., Plukis, A., Poch, A., Policarpo, A., Pretel, C., Quesada, J., Raman, S., Rapp, W., Rauscher, T., Reifarth, R., Rosetti, M., Rubbia, C., Rudolf, G., Ruhlhusen, P., Salgado, J., Soares, J.C., Stephan, C., Tagliente, G., Tain, J., Tassan-Got, L., Tavora, L., Terlizzi, R., Vannini, G., Vaz, P., Ventura, A., Villamarin, D., Vincente, M.C., Vlachoudis, V., Voss, F., Wendler, H., Wiescher, M., Wisshak, K., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-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), and TOF
Subjects: ComputingMethodologies_PATTERNRECOGNITION, TheoryofComputation_COMPUTATIONBYABSTRACTDEVICES, 25.40.L.w, 26.20.+f,27.70.+q,97.10.Cv, TheoryofComputation_GENERAL, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMethodologies_ARTIFICIALINTELLIGENCE, Nuclear Physics
Abstract: The151Sm(n,gamma)152Sm cross section has been measured at the spallation neutron facility n_TOF at CERN in the energy range from 1 eV to 1 MeV. The new facility combines excellent resolution in neutron time-of-flight, low repetition rates, and an unsurpassed instantaneous luminosity, resulting in rather favorable signal/background ratios. The 151Sm cross section is of importance for characterizing neutron capture nucleosynthesis in asymptotic giant branch stars. At a thermal energy of kT=30 keV the Maxwellian averaged cross section of this unstable isotope (t(1/2)=93 yr) was determined to be 3100+/-160 mb, significantly larger than theoretical predictions.
Published: 2004
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460. A low-mass neutron flux monitor for the n_TOF facility at CERN

Author: Mastinu, P.F. Abbondanno, U. Aerts, G. Alvarez, H. Andriamonje, S. Angelopoulos, A. Assimakopoulos, P. Bacri, C.O. Badurek, G. Baumann, P. Bečvář, F. Beer, H. Benlliure, J. Berthier, B. Berthomieux, E. Boffi, S. Borcea, C. Boscolo-Marchi, E. Bustreo, N. Calviño, P. Cano-Ott, D. Capote, R. Carlson, P. Cennini, P. Chepel, V. Chiaveri, E. Coceva, C. Colonna, N. Cortes, G. Cortina, D. Couture, A. Cox, J. Dababneh, S. Dahlfors, M. David, S. Dolfini, R. Domingo-Pardo, C. Duran, I. Eleftheriadis, C. Embid-Segura, M. Ferrant, L. Ferrari, A. Ferreira-Lourenco, L. Ferreira-Marques, R. Frais-Koelbl, H. Furman, W.I. Giomataris, Y. Goncalves, I.F. Gonzalez-Romero, E. Goverdovski, A. Gramegna, F. Griesmayer, E. Gunsing, F. Haight, R. Heil, M. Herrera-Martinez, A. Ioannides, K.G. Janeva, N. Jericha, E. Käppeler, F. Kadi, Y. Karamanis, D. Kelic, A. Ketlerov, V. Kitis, G. Koehler, P.E. Konovalov, V. Kossionides, E. Lacoste, V. Leeb, H. Lindote, A. Lopes, M.I. Loriggiola, M. Lozano, M. Lukic, S. Markov, S. Marigo, S. Marrone, S. Martinez-Val, J. Mengoni, A. Milazzo, P.M. Minguez, E. Molina-Coballes, A. Moreau, C. Neves, F. Oberhummer, H. O'Brien, S. Pancin, J. Papaevangelou, T. Paradela, C. Pavlik, A. Pavlopoulos, P. Perez-Parra, A. Perlado, J.M. Perrot, L. Peskov, V. Plag, R. Plompen, A. Plukis, A. Poch, A. Policarpo, A. Pretel, C. Quesada, J.M. Radici, M. Raman, S. Rapp, W. Rauscher, T. Reifarth, R. Rejmund, F. Rosetti, M. Rubbia, C. Rudolf, G. Rullhusen, P. Salgado, J. Savvidis, E. Soares, J.C. Stephan, C. Tagliente, G. Tain, J.L. Tapia, C. Tassan-Got, L. Tavora, L.M.N. Terlizzi, R. Terrani, M. Tsangas, N. Vannini, G. Vaz, P. Ventura, A. Villamarin-Fernandez, D. Vincente-Vincente, M. Vlachoudis, V. Vlastou, R. Voss, F. Wendler, H. Wiescher, M. Wisshak, K. Zanini, L.
Subjects: Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Physics::Accelerator Physics, Nuclear Experiment
Abstract: A small-mass system has been developed for monitoring the flux of neutrons with energy up to 1 MeV at the new time-of-flight facility at CERN, n_TOF. The monitor is based on a thin Mylar foil with a 6Li deposit, placed in the neutron beam, and an array of Silicon detectors, placed outside the beam, for detecting the products of the 6Li(n, α)3H reaction. The small amount of material on the beam ensures a minimal perturbation of the flux and minimizes the background related to scattered neutrons. Moreover, a further reduction of the γ-ray background has been obtained by constructing the scattering chamber hosting the device in carbon fibre. A detailed description of the flux monitor is here presented, together with the characteristics of the device, in terms of efficiency, resolution and induced background. The use of the monitor in the measurement of neutron capture cross-sections at n-TOF is discussed.
Published: 2004

461. 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

462. A low-mass neutron flux monitor for the n_TOF facility at CERN

Author: Mastinu, Pf, Abbondanno, U., Aerts, G., Alvarez, H., Andriamonje, S., Angelopoulos, A., Assimakopoulos, P., Bacri, Co, Badurek, G., Baumann, P., Becvar, F., Beer, H., Benlliure, J., Berthier, B., Berthomieux, E., Boffi, S., Borcea, C., Boscolo-Marchi, E., Bustreo, N., Calvino, P., Cano-Ott, D., Capote, R., Carlson, P., Cennini, P., Chepel, V., Chiaveri, E., Coceva, C., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., Dababneh, S., Dahlfors, M., David, S., Dolfini, R., Domingo-Pardo, C., Duran, I., Eleftheriadis, C., Embid-Segura, M., Ferrant, L., Ferrari, A., Ferreira-Lourenco, L., Ferreira-Marques, R., Frais-Koelbl, H., Furman, Wi, Giomataris, Y., Goncalves, If, Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haight, R., Heil, M., Herrera-Martinez, A., Ioannides, Kg, Janeva, N., Jericha, E., Kappeler, F., Kadi, Y., Karamanis, D., Kelic, A., Ketlerov, V., Kitis, G., Koehler, Pe, Konovalov, V., Kossionides, E., Lacoste, V., Leeb, H., Lindote, A., Lopes, Mi, Loriggiola, M., Lozano, M., Lukic, S., Markov, S., Marigo, S., Marrone, S., Martinez-Val, J., Mengoni, A., Milazzo, Pm, Minguez, E., Molina-Coballes, A., Moreau, C., Neves, F., Oberhummer, H., O Brien, S., Pancin, J., Papaevangelou, T., Paradela, C., Pavlik, A., Pavlopoulos, P., Perez-Parra, A., Perlado, Jm, Perrot, L., Peskov, V., Plag, R., Plompen, A., Plukis, A., Poch, A., Policarpo, A., Pretel, C., Quesada, Jm, Radici, M., Raman, S., Rapp, W., Rauscher, T., Reifarth, R., Rejmund, F., Rosetti, M., Rubbia, C., Rudolf, G., Rullhusen, P., Salgado, J., Savvidis, E., Soares, Jc, Stephan, C., Tagliente, G., Tain, Jl, Tapia, C., Tassan-Goth, L., Tavora, Lmn, Terlizzi, R., Terrani, M., Tsangas, N., Vannini, G., Vaz, P., Ventura, A., Villamarin-Fernandez, D., Vincente-Vincente, M., Vlachoudis, V., Vlastou, R., Voss, F., Wendler, H., Wiescher, M., Wisshak, K., Zanini, L., and nTOF Collaboration
Abstract: A small-mass system has been developed for monitoring the flux of neutrons with energy up to 1 MeV at the new time-of-flight facility at CERN, n_TOF. The monitor is based on a thin Mylar foil with a Li-6 deposit, placed in the neutron beam, and an array of Silicon detectors, placed outside the beam, for detecting the products of the Li-6(n, alpha)H-3 reaction. The small amount of material on the beam ensures a minimal perturbation of the flux and minimizes the background related to scattered neutrons. Moreover, a further reduction of the gamma-ray background has been obtained by constructing the scattering chamber hosting the device in carbon fibre. A detailed description of the flux monitor is here presented, together with the characteristics of the device, in terms of efficiency, resolution and induced background. The use of the monitor in the measurement of neutron capture cross-sections at n_TOF is discussed. Brazilian Journal of Physics
Published: 2004

463. Measurement of the n(-)TOF beam profile with a micromegas detector

Author: Pancin, J., Abbondanno, U., Aerts, G., Alvarez, H., Andriamonje, S., Angelopoulos, A., Assimakopoulos, P., Bacri, C. O., Badurek, G., Baumann, P., Becvar, F., Plukis, A., Poch, A., Policarpo, A., Pretel, C., Quesada, J., Radici, M., Raman, S., Rapp, W., Reifarth, R., Rejmund, F., Beer, H., Rosetti, M., Rubbia, C., Rudolf, G., Rullhusen, P., Salgado, J., Savvidis, E., Stephan, C., Tagliente, G., Tain, J., Tapia, C., Benlliure, J., Tassan-Got, L., Tavora, L., Terlizzi, R., Terrani, M., Tsangas, N., Vannini, G., Vaz, P., Ventura, A., Villamarin-Fernandez, D., Vincente-Vincente, M., Berthier, B., Vlachoudis, V., Vlastou, R., Voss, F., Wendler, H., Wiescher, M., Wisshak, K., Zanini, L., Berthoumieux, E., Boffi, S., Borcea, C., Boscolo-Marchi, E., Bustreo, N., Calvino, F., Cano-ott, D., Capote, R., Carlson, P., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., Dababneh, S., Dahlfors, M., David, S., Delbart, A., Derre, J., Dolfini, R., Domingo, C., Duran-Escribano, I., Eleftheriadis, C., Embid-Segura, M., Ferrant, L., Ferrari, A., Ferreira-Lourenco, L., Ferreiramarques, R., Frais-Koelbl, H., Furman, W., Giomataris, Y., Goncalves, I., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haight, R., Heil, M., Herrera-Martinez, A., Ioannides, K., Janeva, N., Jeanneau, F., Jericha, E., Kappeler, F., Kadi, Y., Karamanis, D., Kelic, A., Ketlerov, V., Kitis, G., Koehler, P., Konovalov, V., Kossionides, E., Lacoste, V., Leeb, H., Lindote, A., Lopes, I., Lozano, M., Lukic, S., Markov, S., Marrone, S., Martinez-Val, J., Mastinu, P., Mengoni, A., Milazzo, P., Minguez, E., Molina-Coballes, A., Moreau, C., Neves, F., Oberhummer, H., O'brien, S., Papadopoulos, I., Papavengelou, T., Paradela, C., Pavlik, A., Pavlopoulos, P., Perez-Parra, A., Perlado, J., Peskov, V., Perrot, L., Plag, R., and Plompen, A.
Subjects: micromegas, n(-)tof, beam profile, gaseous detector, neutron beam profiler
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 Li-6(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. (C) 2004 Elsevier B.V. All rights reserved. Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment
Published: 2004

464. New experimental validation of the pulse height weighting technique for capture cross-section measurements

Author: Abbondanno, U. Aerts, G. Alvarez, H. Andriamonje, S. Angelopoulos, A. Assimakopoulos, P. Bacri, C.O. Badurek, G. Baumann, P. Bečvář, F. Beer, H. Benlliure, J. Berthier, B. Berthomieux, E. Boffi, S. Borcea, C. Boscolo-Marchi, E. Bustreo, N. Calviño, P. Cano-Ott, D. Capote, R. Carlson, P. Cennini, P. Chepel, V. Chiaveri, E. Coceva, C. Colonna, N. Cortes, G. Cortina, D. Couture, A. Cox, J. Dababneh, S. Dahlfors, M. David, S. Dolfini, R. Domingo-Pardo, C. Duran, I. Eleftheriadis, C. Embid-Segura, M. Ferrant, L. Ferrari, A. Ferreira-Lourenco, L. Ferreira-Marques, R. Frais-Koelbl, H. Furman, W.I. Giomataris, Y. Goncalves, I.F. Gonzalez-Romero, E. Goverdovski, A. Gramegna, F. Griesmayer, E. Gunsing, F. Haight, R. Heil, M. Herrera-Martinez, A. Ioannides, K.G. Janeva, N. Jericha, E. Käppeler, F. Kadi, Y. Karamanis, D. Kelic, A. Ketlerov, V. Kitis, G. Koehler, P.E. Konovalov, V. Kossionides, E. Lacoste, V. Leeb, H. Lindote, A. Lopes, M.I. Lozano, M. Lukic, S. Markov, S. Marrone, S. Martinez-Val, J. Mastinu, P. Mengoni, A. Milazzo, P.M. Minguez, E. Molina-Coballes, A. Moreau, C. Neves, F. Oberhummer, H. O'Brien, S. Pancin, J. Papaevangelou, T. Paradela, C. Pavlik, A. Pavlopoulos, P. Perez-Parra, A. Perlado, J.M. Perrot, L. Peskov, V. Plag, R. Plompen, A. Plukis, A. Poch, A. Policarpo, A. Pretel, C. Quesada, J.M. Radici, M. Raman, S. Rapp, W. Rauscher, T. Reifarth, R. Rejmund, F. Rosetti, M. Rubbia, C. Rudolfh, G. Rullhusen, P. Salgado, J. Savvidis, E. Soares, J.C. Stephan, C. Tagliente, G. Tain, J.L. Tapia, C. Tassan-Got, L. Tavora, L.M.N. Terlizzi, R. Terrani, M. Tsangas, N. Vannini, G. Vaz, P. Ventura, A. Villamarin-Fernandez, D. Vincente-Vincente, M. Vlachoudis, V. Vlastou, R. Voss, F. Wendler, H. Wiescher, M. Wisshak, K. Zanini, L.
Abstract: The accuracy of the pulse height weighting technique for the determination of neutron capture cross-sections is investigated. The technique is applied to measurements performed with C6D6 liquid scintillation detectors of two different types using capture samples of various dimensions. The data for well-known (n,γ) resonances are analyzed using weighting functions obtained from Monte Carlo simulations of the experimental set-up. Several causes of systematic deviation are identified and their effect is quantified. In all the cases measured the reaction yield agrees with the standard value within 2%. © 2003 Elsevier B.V. All rights reserved.
Published: 2004

465. PP107-SUN: Glutamine and Total Parenteral Nutrition in Bone Narrow Transplant Patients

Author: Herrera-Martinez, A.D., primary, Manzano Garcia, G., additional, Alhambra Exposito, M.R., additional, Molina Puerta, M.J., additional, Muñoz Jimenez, C., additional, Calañas Continente, A., additional, Tenorio Jimenez, C., additional, Prior Sanchez, I., additional, Bahamondes Opazo, R., additional, and Galvez Moreno, M.A., additional
Published: 2014
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466. PP129-MON: Lateral Amyothropic Sclerosis: Percutaneous Endoscopic Gastrostomy and Enteral Nutrition

Author: Herrera-Martinez, A.D., primary, Prior Sánchez, I., additional, Tenorio Jiménez, C., additional, Molina Puerta, M., additional, Calañas Continente, A., additional, Manzano Garcia, G., additional, and Galvez Moreno, M., additional
Published: 2014
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467. Desarrollo de un prototipo de prótesis auditiva por transmisión ósea para humanos con daños en la sección externa y media del oído

Author: Herrera Martinez, Marcelo, primary, Casas, Julian, additional, and Guevara, Isaias, additional
Published: 2014
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468. Dose determination for a mycosis fungoides disease treatment using EDR film dosimetry for a TSEI technique

Author: Herrera-Martinez, F., primary, Rodriguez-Ponce, M., additional, and Toledano-Cuevas, D., additional
Published: 2014
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469. Chronic Wounds with Emphasis in Diabetic Foot Ulcers

Author: Berlanga-Acosta, Jorge, primary, Armstrong, David G., additional, Schultz, Gregory S., additional, and Herrera-Martinez, Luis, additional
Published: 2014
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470. IMPROVED ACCURACY (<font>N</font>, γ) MEASUREMENTS AT N_TOF

Author: J. Salgado, F. Gramegna, A. Poch, Rene Reifarth, A. Kelic, A. Pavlik, R. Vlastou, Gerald Badurek, R. Dolfini, E. Berthoumieux, M. Vincente-Vincente, Y. Giomataris, J. M. Quesada, L. Tassan-Got, A. Mengoni, I. Duran-Escribano, N. Colonna, E. Boscolo-Marchi, A. J. M. Plompen, V. Ketlerov, James L. Cox, F. Voss, W.I. Furman, Isabel Lopes, F. Neves, P. M. Milazzo, G. Cortes, D. Karamanis, C. Eleftheriadis, P. Cennini, E. Mínguez, F. Rejmund, A. Herrera-Martinez, H. Álvarez, J. L. Tain, A. Plukis, Marco Radici, Roberto Capote, Matthias Heil, J. Pancin, A. Angelopoulos, Arnaud Ferrari, E. Jericha, P.A. Assimakopoulos, Corrie S. Moreau, Vasilis Vlachoudis, C. Borcea, S. David, G. Tagliente, H. Leeb, C. Tapia, José M. Martínez-Val, S. Andriamonje, A. Molina-Coballes, A.J.P.L. Policarpo, L. Ferrant, E. González-Romero, L. Ferreira-Lourenco, L. Perrot, G. Vannini, S. O'Brien, D. Villamarin-Fernandez, U. Abbondanno, A. Lindote, B. Berthier, José Manuel Perlado, Heinz Oberhummer, G. Aerts, M. Rosetti, C. Stephan, F. Gunsing, R. Terlizzi, Y. Kadi, E. Griesmayer, S. Markov, E. Chiaveri, P. F. Mastinu, H. Frais-Koelbl, K. G. Ioannides, L. Tavora, N. Janeva, S. Lukic, F. Käppeler, V. Chepel, G. Rudolf, E. Savvidis, A. Perez-Parra, Ralf Plag, J. Benlliure, N. Bustreo, M. Terrani, P. Baumann, P. Rullhusen, P. E. Koehler, A. Ventura, Subramanian Raman, V. Konovalov, M. Embid-Segura, D. Cano-Ott, K. Wisshak, Per Carlson, P. Pavlopoulos, M. Dahlfors, P. Vaz, F. Bečvář, N. Tsangas, D. Cortina, Manuel Lozano, Aaron Couture, C.O. Bacri, H. Wendler, C. Domingo, E. Kossionides, V. Peskov, R. C. Haight, V. Lacoste, L. Zanini, F. Calviño, C. Paradela, H. Beer, C. Rubbia, Isabel S. Gonçalves, S. Marrone, Michael Wiescher, R. Ferreira-Marques, Saed Dababneh, C. Pretel, Sigfrido Boffi, George Kitis, W. Rapp, and A. Goverdovski
Published: 2003
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471. NEUTRON CAPTURE MEASUREMENTS AT THE CERN-NTOF FACILITY FOR ADS APPLICATIONS

Author: J. M. Quesada, M. Embid-Segura, G. Vannini, M. Rosetti, L. Tassan-Got, P. Cennini, J. Salgado, C. Pretel, K. G. Ioannides, D. Cortina, Manuel Lozano, A. Poch, S. O'Brien, C.O. Bacri, N. Bustreo, M. Dahlfors, B. Berthier, P. Vaz, C. Stephan, F. Gunsing, R. Terlizzi, V. Peskov, C. Eleftheriadis, E. Jericha, L. Ferrant, Ralf Plag, J. Benlliure, V. Konovalov, G. Cortes, D. Karamanis, W. Rapp, Aaron Couture, I. Duran-Escribano, A.J.P.L. Policarpo, Subramanian Raman, D. Cano-Ott, L. Tavora, E. González-Romero, A. Mengoni, V. Ketlerov, Roberto Capote, P. Rullhusen, A. Pavlik, F. Rejmund, P.A. Assimakopoulos, V. Lacoste, Sigfrido Boffi, S. David, Matthias Heil, L. Perrot, Marco Radici, Y. Giomataris, G. Tagliente, W.I. Furman, J. Pancin, A. Perez-Parra, E. Savvidis, E. Mínguez, A. Lindote, Y. Kadi, G. Aerts, M. Vincente-Vincente, M. Terrani, H. Frais-Koelbl, A. Goverdovski, P. E. Koehler, V. Chepel, F. Neves, P. M. Milazzo, G. Rudolf, F. Calviño, Gerald Badurek, H. Leeb, R. Dolfini, José M. Martínez-Val, P. Baumann, P. Pavlopoulos, D. Villamarin-Fernandez, Per Carlson, U. Abbondanno, George Kitis, Isabel Lopes, José Manuel Perlado, Heinz Oberhummer, K. Wisshak, F. Käppeler, A. Ventura, H. Wendler, F. Bečvář, A. J. M. Plompen, A. Angelopoulos, S. Andriamonje, E. Griesmayer, N. Tsangas, E. Kossionides, H. Álvarez, E. Chiaveri, P. F. Mastinu, James L. Cox, J. L. Tain, R. Vlastou, E. Berthoumieux, L. Zanini, E. Boscolo-Marchi, R. Ferreira-Marques, Saed Dababneh, C. Borcea, N. Colonna, L. Ferreira-Lourenco, Corrie S. Moreau, S. Markov, A. Plukis, C. Domingo, R. C. Haight, F. Gramegna, C. Paradela, H. Beer, Michael Wiescher, C. Rubbia, N. Janeva, S. Lukic, A. Herrera-Martinez, Arnaud Ferrari, A. Molina-Coballes, Isabel S. Gonçalves, F. Voss, S. Marrone, Vasilis Vlachoudis, C. Tapia, Rene Reifarth, and A. Kelic
Subjects: Physics, Nuclear physics, Neutron capture, Large Hadron Collider
Published: 2003
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472. Simulation of the ofdm technique for the transmission of digital radio

Author: Herrera Martinez, Marcelo, Pérez Pereira, Miguel, Herrera Martinez, Marcelo, and Pérez Pereira, Miguel
Abstract: The present project is motivated by the necessity of analyzing the technique of OFDM modulation and its performance, focused to the Transmission of Digital Radio. Traditionally all the radio programs are transmitted by FM, and AM modulations, and the radio should be tuned to each one of these frequencies; this used a wide range of the spectrum for a relatively short range of stations, limiting the experience of listening. In this project, a modulation system for Digital Radio Transmission is pretended, in order to combine multiple streams of audio in a relatively narrow frequency band, centered in a defi nite transmission frequency.
Published: 2013

473. System and software development to measure cylindrical pipes based on acoustic reflectometry

Author: Herrera Martinez, Marcelo, Gualtero Mosquera, Andrea, Rincón Flórez, Raúl, Herrera Martinez, Marcelo, Gualtero Mosquera, Andrea, and Rincón Flórez, Raúl
Abstract: The following document describes the use of the acoustic reflectometry, the theory that follows it, and its implementation as a technique to measure cylindrical pipes. It describes how it was constructed and the materials used in the construction and implementation of the system that allows capturing signals (reflections) from the pipe under evaluation; also shown herein are the results obtained from measuring pipes of different lengths. This work also proposes simple application software that allows analyzing measurements made using acoustic reflectometry, as well as some conclusions and recommendations for future work.
Published: 2013

474. Pruebas subjetivas de audio-codecs durante el periodo entre 2010-2012 en la Universidad de San Buenaventura, Bogotá

Author: Herrera Martinez, Marcelo, Paez Soto, Dario Alfonso, Pérez Pereira, Miguel, Herrera Martinez, Marcelo, Paez Soto, Dario Alfonso, and Pérez Pereira, Miguel
Abstract: El presente artículo describe una serie de procedimientos y resultados que fueron obtenidos durante los últimos dos años en la evaluación subjectiva de audio-codecs. El método de testeo usado fue el “Método de Doble estímulo con referencia escondida”. Los resultados han sido validados estadísticamente con ANOVA de dos factores (Análisis de Varianzas”). Para la descripción estadística y los resultados, el valor medio de los codecs y los intervalos de confidencia son presentados.
Published: 2013

475. Metodologías psicoacústicas en la determinación de desórdenes psicológicos

Author: Herrera Martinez, Marcelo, Rincón Flórez, Raúl, Vargas G., Carlos, Herrera Martinez, Marcelo, Rincón Flórez, Raúl, and Vargas G., Carlos
Abstract: La ansiedad es uno de los principales problemas de las sociedades modernas. La sobre-activación de un organismo a un estímulo en particular, genera una reacción en cadena, que altera la cotidianidad del individuo, y lo bloquea psicológicamente, en algunas situaciones. En tratamiento terapéutico existen varias estrategias que buscan el control sobre estas reacciones y la ponderación de los estímulos, entre éstas, las terapias fundadas en estimulación sonora. Dentro del tratamiento músico-terapéutico, se buscan procedimientos que permitan tener control sobre los procesos de reacción emocional y/ó fisiológicos, midiendo el impacto a través de instrumentos que revelan las respuestas fisiológicas. De esta manera, encontrar una correlación entre estos procedimientos ha motivado la búsqueda de metodologías psicométricas.
Published: 2013

476. Measurements of high-energy neutron-induced fission ofnatPb and209Bi

Author: H. Álvarez, J. L. Tain, D. Cano-Ott, P. E. Koehler, Marco T. Pigni, Rene Reifarth, P. Pavlopoulos, I. Dillmann, J. M. Quesada, Masayuki Igashira, M. Kerveno, Christoph A. Stephan, G. Cortes, S. Lukic, G. Aerts, D. Tarrío, Corrie S. Moreau, S. Isaev, U. Abbondanno, F. Gunsig, Ralf Plag, Roberto Capote, A. Plukis, P.A. Assimakopoulos, F. Alvarez-Velarde, Gerald Badurek, G. Vannini, G. Tagliente, A. Ventura, C. Eleftheriadis, A. Herrera-Martinez, N. Patronis, W.I. Furman, C. Rubbia, S. Walter, A. Lindote, Arnaud Ferrari, M. C. Vicente, Thomas Rauscher, A. J. M. Plompen, R. Vlastou, L. Perrot, J. Marganiec, Alberto Mengoni, C. A. Papachristodoulou, E. Berthoumieux, S. Andriamonje, I. Lopes, L. Sarchiapone, D. Karadimos, E. Chiaveri, P. F. Mastinu, I. Savvidis, James L. Cox, L. Tassan-Got, Carlos Guerrero, E. González-Romero, H. Leeb, Heinz Oberhummer, R. C. Haight, F. Becvar, C. Paradela, L. Audouin, M. Krtička, C. Le Naour, R. Ferreira-Marques, T. Martinez, D. Trubert, Michael Wiescher, F. Voss, Cristian Massimi, K. Wisshak, S. David, B. Berthier, Y. Kadi, Michael Heil, Marco Calviani, E. Kossionides, I. Duran, V. Chepel, M. Oshima, G. Rudolf, C. T. Papadopoulos, Javier Praena, L. Ferrant, J. Andrzejewski, V. Vlachoudis, F. Neves, P. M. Milazzo, P. Baumann, D. Villamarin, C. Pretel, E. Jericha, K. Fujii, C. Santos, M. Embid-Segura, Isabel S. Gonçalves, S. Marrone, Manuel Lozano, L. Tavora, P. Rullhusen, P. Cennini, M. Mosconi, S. O'Brien, Nicola Colonna, F. Gramegna, R. Terlizzi, F. Käppeler, J. Pancin, J. Salgado, A. Poch, M. Dahlfors, C. Carrapiço, P. Vaz, Aaron Couture, B. Haas, F. Calviño, W. Dridi, C. Lampoudis, A. Pavlik, C. Domingo-Pardo, D. Karamanis, 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. Becvár, 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. Gonçalve, E. González-Romero, F. Gramegna, C. Guerrero, F. Gunsig, 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. Krticka, 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. Vicente, V. Vlachoudi, R. Vlastou, F. Vo, S. Walter, M. Wiescher, and K. Wisshak
Subjects: High energy, Engineering, Fission, business.industry, Physics, QC1-999, Nuclear engineering, Nuclear Theory, Creative commons, Engineering physics, neutron time-of-flight facility, Neutron, Nuclear Experiment, business, License
Abstract: he CERN Neutron Time-Of-Flight (n_TOF) facility is well suited to measure low cross sections as those of neutron-induced fission in subactinides. The cross section ratios of (nat)Pb and (209)Bi relative to (235)U and (238)U were measured using PPAC detectors and a fragment coincidence method that allows us to identify the fission events. The present experiment provides first results for neutron-induced fission up to 1 GeV. Good agreement is found with previous experimental data below 200 MeV. The comparison with proton-induced fission indicates that the limiting regime where neutron-induced and proton-induced fission reach equal cross sections is close to 1 GeV.
Published: 2010
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477. Results from the Commissioning of the n-TOF Spallation Neutron Source at CERN

Author: P. Haefner, F. Saldana, M. Dahlfors, S. Buono, A. Herrera-Martinez, Ralf Nolte, C. Borcea, G. Garcia-Munoz, Carlo Rubbia, V. Vlachoudis, V. Lacoste, P. Cennini, Yacine Kadi, L. Zanini, Alfredo Ferrari, M. Weierganz, Volker Dangendorf, and E. Radermacher
Subjects: Physics, Nuclear and High Energy Physics, Large Hadron Collider, Astrophysics::High Energy Astrophysical Phenomena, Proton Synchrotron, Nuclear physics, Neutron flux, Neutron detection, Neutron source, Physics::Accelerator Physics, Neutron, Spallation, Nuclear Experiment, Instrumentation, Spallation Neutron Source, Nuclear Physics
Abstract: The new neutron time-of-flight facility (n_TOF) has been built at CERN and is now operational. The facility is intended for the measurement of neutron induced cross-sections of relevance to Accelerator Driven Systems (ADS) and to fundamental physics. Neutrons are produced by spallation of the 20 GeV /c proton beam, delivered by the Proton Synchrotron (PS), on a massive target of pure lead. A measuring station is placed at ≈185 m from the neutron producing target, allowing high-resolution measurements. The facility was successfully commissioned with two campaigns of measurements, in November 2000 and April 2001. The main interest was concentrated in the physical parameters of the installation (neutron fluence and resolution function), along with the target behavior and various safety-related aspects. These measurements confirmed the expectations from Monte Carlo simulations of the facility, thus allowing to initiate the foreseen physics program.
Published: 2002

478. Desarrollo de un prototipo de prótesis auditiva por transmisión ósea para humanos con daños en la sección externa y media del oído

Author: Marcelo Herrera Martinez, Julian Casas, and Isaias Guevara
Abstract: Este trabajo describe el desarrollo de un sistema, el cual puede ser usado para latransmisión de señales acústicas a través de conducción ósea, con el objetivo de recuperar y/o ampliar la audibilidad en personas con deficiencias o limitaciones auditivas. El prototipo permite recuperar la capacidad auditiva con un método no- convencional.
Published: 2014
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479. Study of the background in the measuring station at the n_TOF facility at CERN: sources and solutions

Author: Zanini, L, Abbondanno, U, Aerts, G, Andriamonje, Samuel A, Andrzejewski, J, Angelopoulous, A, Assimakopoulos, Panayiotis, Bacri, C-O, Badurek, G, Berthoumieux, E, Baumann, P, Beer, H, Benlliure, J, Berthier, B, Bondarenko, I, Borcea, C, Bos, A J J, Boscolo-Marchi, E, Bustreo, N, Calviño, F, Cano-Ott, D, Capote, R, Carlson, P, Charpak, Georges, Chauvin, N, Cennini, P, Chepel, V, Colonna, N, Cortés, G, Cortina-Gil, D, Corvi, F, Cusmano, A, Dababneh, S, Dahlfors, M, Damianoglou, D, David, S, Dimovasili, E, Domingo, C, Doroshenko, A, Duran-Escribano, I, Eleftheriadis, C, Embid, M, Ferrant, L, Ferrari, A, Ferreira-Marques, R, Frais-Kölbl, H, Furman, W, Fursov, B, Garzón, J A, Giomataris, Ioanis, Gledenov, Y, Gonzalez-Romero, E, Goverdovski, A, Gramegna, F, Griesmayer, E, Gunsing, F, Haefner, P, Haight, R, Heil, M, Herrera-martinez, A, Hollander, P, Ioannou, P, Isaev, S, Jericha, E, Kadi, Y, Kappeler, F, Karadimos, D, Karamanis, D, Kayukova, A, Kazakov, L, Kelic, A, Ketlerov, V, Kitis, G, Köhler, P E, Kopach, Y, Kossionides, E, Kroshkina, I, Lacoste, V, Lamboudis, C, Leeb, H, Leprêtre, A, Lopes, M, Lozano, M, Marrone, S, Martínez-Val, J M, Mastinu, P, Mengoni, A, Meunier, R, Mezentsev, A J, Milazzo, P, Minguez, E, Mitrofanov, V, Moreau, C, Müller, A, Nicolis, N, Nikolenkov, V, Oberhummer, Heinz, Pakou, A, Pancin, J, Papadopoulous, K, Papaevangelou, T, Paradela, C, Paradelis, T, Pavlik, A, Pavlopoulos, P, Perrez-Parra, A, Perriale, L, Perlado, J M, Peskov, Vladimir, Piksaikin, V, Plag, R, Plompen, A, Plukis, A, Poch, A, Policarpo, Armando, Popov, A, Popov, Y P, Pretel, C, Quesada, J M, Radermacher, E, Rapp, W, Rauscher, T, Reifarth, R, Rejmund, F, Rubbia, Carlo, Rudolf, G, Rullhusen, P, Sakelliou, L, Saldaña, F, Samylin, B, Savvidis, I, Savvidis, S, Sedyshev, P, Stéphan, C, Szalanski, P, Tagliente, G, Taín, J L, Tapia, C, Tassan-Got, L, Terchychnyi, R, Tsabaris, C, Tsangas, N, van Eijk, C W E, Vannini, G, Ventura, A, Villamarin, A, Vlachoudis, V, Vlastou, R, Voinov, A, Voss, F, Wendler, H, Wiescher, M, Wisshak, K, Zeinalov, S, and Zhuravlev, B
Subjects: Accelerators and Storage Rings
Abstract: A background roughly two orders of magnitude higher than tolerable was found in the n_TOF facility at CERN during the first measurements [1]. This note describes a series of additional measurements performed in the n_TOF experimental area to study the origin and the characteristics of the background. The program of these measurements was determined taking into account the results from the simulations carried out by the EET group [2]. A first phase of measurements confirmed what was expected from the simulations, namely that the dominant source of background was due to neutrons generated by negative muon capture. Actions to reduce the background were taken according to the results from both measurements and simulations. An iron shielding wall 3.2 m thick was then placed in between the sweeping magnet and the second collimator, with the purpose of stopping most of the muons. In a second phase of measurements, results showed that the additional shielding reduced the main component of the background by about a factor of 30.
Published: 2001

480. Developing Country Vaccine Manufacturers Network (DCVMN), 26-27 April 2001, Bandung, Indonesia

Author: J. Henriks, Thamrin Poeloengan, Isaias Raw, Luis Herrera Martinez, and Mohamed El-Abbadi
Subjects: Economic growth, Vaccines, General Veterinary, General Immunology and Microbiology, Drug Industry, Public Health, Environmental and Occupational Health, MEDLINE, Developing country, World Health Organization, Infectious Diseases, Molecular Medicine, Humans, Business, Drug industry, Developing Countries
Published: 2001

481. Descripción de sistemas discretos lineales con respuestas al impulso periódicas

Author: Herrera Martinez, Marcelo and Herrera Martinez, Marcelo
Abstract: El presente trabajo es una investigación de las propiedades de los sistemas discretos lineales con respuestas al impulso periódicas. Este es un caso particular de los Sistemas LTI (Lineales e Invariantes con el Tiempo) con esta clase de respuestas al impulso. Primero se investiga la forma general de la función de transferencia cuando la respuesta al impulso es periódica. El caso donde los periodos de la señal de entrada y de la respuesta al impulso son iguales tambien es investigado. El último caso investigado, es aquél, donde los dos periodos son diferentes. Este caso particular es simulado en MATLAB.
Published: 2012

482. Sistema de monitorización remoto de señales biomédicas vía celular

Author: Rosas J, Nelson Felipe, Rosas J, Carolina, Herrera Martinez, Marcelo, Rosas J, Nelson Felipe, Rosas J, Carolina, and Herrera Martinez, Marcelo
Abstract: El presente artículo describe las herramientas de adquisición de señales biomédicas y la descripción del proceso de transmisión y recepción de esas señales por vía-celular para el monitoreo desde una aplicación Java.
Published: 2012

483. Bandas críticas y el cálculo de potencia espectral de barks en rango de frecuencia lineal y por tercios de octava

Author: Herrera Martinez, Marcelo, Ortega, Alexánder, Vargas G., Carlos, Herrera Martinez, Marcelo, Ortega, Alexánder, and Vargas G., Carlos
Abstract: En el presente artículo, calculamos la Potencia Espectral de Barks de una forma correcta y precisa. El presente trabajo calcula la Potencia Espectral de Barks con un error pequeño, el cual es producido cuando se calcula la Transformada Discreta de Fourier (DFT). Los investigadores tienden a olvidar las suposiciones y condiciones que son inherentes al cálculo. Una corta introducción sobre las Bandas Críticas y la Escala Bark son presentadas.
Published: 2012

484. Modelos psicoacústicos en compresión de audio con transformada Wavelet.

Author: Herrera Martinez, Marcelo, Mesa C., Felipe, Rosas J, Nelson Felipe, Herrera Martinez, Marcelo, Mesa C., Felipe, and Rosas J, Nelson Felipe
Abstract: El objetivo del presente trabajo es describir los principios de compresión de señales y principios psicoacústicos para proveer las bases de técnicas digitales usadas en estos campos. La compresión de señales de audio reduce la información de datos para almacenar y/o transmitir una señal de audio. La reducción de memoria es realizada, reduciendo información redundante e irrelevante contenida en la señal.
Published: 2012

485. Point Mutations and Antiviral Drug Resistance

Author: José Arellano-Galindo, Blanca Lilia Barron, Yetlanezi Vargas-Infante, Enrique Santos-Esteban, Emma del Carmen Herrera-Martinez, Norma Velazquez-Guadarrama, Gustavo Reyes-Teran, José Arellano-Galindo, Blanca Lilia Barron, Yetlanezi Vargas-Infante, Enrique Santos-Esteban, Emma del Carmen Herrera-Martinez, Norma Velazquez-Guadarrama, and Gustavo Reyes-Teran
Published: 2012
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486. 197-Au(n,gamma ) cross section in the unresolved resonance region

Author: 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, Poch Parés, Agustí, Praena, J., Pretel Sánchez, Carme, Igashira, M., Quesada, J., Pigni, M.T., Jericha, E., Plag, R., Isaev, S., Plompen, A., Karadimos, D., Cennini, P., Carrapiço, C., Carrillo de Albornoz, A., Cano-Ott, D., Capote, R., Calviani, M., Calviño Tavares, Francisco, Belloni, F., Berthoumieux, E., Perrot, L., Martínez, T., Pavlopoulos, P., Pancin, J., Papachristodoulou, C., O'Brien, S., Oshima, M., Patronis, N., Pavlik, A., Papadopoulos, C., Paradela, C., Oberhummer, H., Lozano, M., Neves, F., Mosconi, M., Tassan-Got, L., Mastinu, P., Tarrío, D., Mendoza, E., Terlizzi, R., Milazzo, P.M., Tavora, L., Moreau, C., Losito, R., Vaz, P., Vannini, G., Márques, L., Villamarin, D., Marrone, S., Ventura, A., Tagliente, G., Marganiec, J., Tain, J.L., Lukic, S., Baumann, P., Barbagallo, M., Wisshak, K., Plukis, A., Badurek, G., Lindote, A., Wiescher, M., Audouin, L., Lopes, I., Wendler, H., Assimakopoulos, P.A., Lampoudis, C., Walter, S., Andrzejewski, J., Kadi, Y., Leeb, H., Andriamonje, S., Kossionides, E., Krticka, M., Álvarez-Velarde, F., Álvarez, H., Aerts, G., Becvár, F., Konovalov, V., Vlastou, R., Rauscher, T., Koehler, P., Voss, F., Ketlerov, V., Kerveno, M., Vlachoudis, V., Karamanis, D., Reifarth, R., Abbondanno, U., Griesmayer, E., Lederer, C., Guerrero, C., Colonna, N., Haas, B., Domingo-Pardo, C., Haight, R., Gunsing, F., Heil, M., Käppeler, F., Herrera-Martinez, A., Massimi, C., Mengoni, A., Wallner, A., Sarmento, R., Savvidis, I., Santos, C., Sarchiapone, L., Rullhusen, P., Gramegna, F., Salgado, J., Goverdovski, A., Rubbia, C., Gonzalez-Romero, E., Rudolf, G., Goncalves, I., Stephan, C., Rosetti, M., Ferreira-Marques, R., Fitzpatrick, L., Ferrant, L., Ferrari, A., Furman, W., Frais-Koelbl, H., Fujiii, K., Duran, I., Embid-Segura, M., Eleftheriadis, C., David, S., Dillmann, I., Dolfini, R., Dridi, W., Cortés Rossell, Guillem Pere, Couture, A., Cox, J., Dahlfors, M., Chiaveri, E., Chepel, V., 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, Poch Parés, Agustí, Praena, J., Pretel Sánchez, Carme, Igashira, M., Quesada, J., Pigni, M.T., Jericha, E., Plag, R., Isaev, S., Plompen, A., Karadimos, D., Cennini, P., Carrapiço, C., Carrillo de Albornoz, A., Cano-Ott, D., Capote, R., Calviani, M., Calviño Tavares, Francisco, Belloni, F., Berthoumieux, E., Perrot, L., Martínez, T., Pavlopoulos, P., Pancin, J., Papachristodoulou, C., O'Brien, S., Oshima, M., Patronis, N., Pavlik, A., Papadopoulos, C., Paradela, C., Oberhummer, H., Lozano, M., Neves, F., Mosconi, M., Tassan-Got, L., Mastinu, P., Tarrío, D., Mendoza, E., Terlizzi, R., Milazzo, P.M., Tavora, L., Moreau, C., Losito, R., Vaz, P., Vannini, G., Márques, L., Villamarin, D., Marrone, S., Ventura, A., Tagliente, G., Marganiec, J., Tain, J.L., Lukic, S., Baumann, P., Barbagallo, M., Wisshak, K., Plukis, A., Badurek, G., Lindote, A., Wiescher, M., Audouin, L., Lopes, I., Wendler, H., Assimakopoulos, P.A., Lampoudis, C., Walter, S., Andrzejewski, J., Kadi, Y., Leeb, H., Andriamonje, S., Kossionides, E., Krticka, M., Álvarez-Velarde, F., Álvarez, H., Aerts, G., Becvár, F., Konovalov, V., Vlastou, R., Rauscher, T., Koehler, P., Voss, F., Ketlerov, V., Kerveno, M., Vlachoudis, V., Karamanis, D., Reifarth, R., Abbondanno, U., Griesmayer, E., Lederer, C., Guerrero, C., Colonna, N., Haas, B., Domingo-Pardo, C., Haight, R., Gunsing, F., Heil, M., Käppeler, F., Herrera-Martinez, A., Massimi, C., Mengoni, A., Wallner, A., Sarmento, R., Savvidis, I., Santos, C., Sarchiapone, L., Rullhusen, P., Gramegna, F., Salgado, J., Goverdovski, A., Rubbia, C., Gonzalez-Romero, E., Rudolf, G., Goncalves, I., Stephan, C., Rosetti, M., Ferreira-Marques, R., Fitzpatrick, L., Ferrant, L., Ferrari, A., Furman, W., Frais-Koelbl, H., Fujiii, K., Duran, I., Embid-Segura, M., Eleftheriadis, C., David, S., Dillmann, I., Dolfini, R., Dridi, W., Cortés Rossell, Guillem Pere, Couture, A., Cox, J., Dahlfors, M., Chiaveri, E., and Chepel, V.
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 Maxwellianaveraged 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., Postprint (published version)
Published: 2011

487. Evaluación de artefactos de compresión de sonido

Author: Herrera Martinez, Marcelo and Herrera Martinez, Marcelo
Abstract: El presente artículo trata de la evaluación subjetiva de sistemas de codificación de audio. De acuerdo con estos resultados se encuentra que, dependiendo del tipo de la señal y dependiendo del tipo de señal y del algoritmo del sistema de codificación de audio, diferentes tipos de errores audibles se hacen presentes. Estos errores son llamados errores de codificación, sin embargo, mientras pueden ser perceptibles tres clases de artefactos, el autor propone que en el dominio de codificación hay una clase común para la aparición de artefactos: el rastreo no eficiente de señales transientes estocásticas. Para este propósito el estado del arte de los sistemas de audio codificación usan un gran rango de técnicas de procesamiento de señal, para lo cual la aplicación de la transformada de Wavelet está descrita.
Published: 2011

488. SUN-P051: The Role of Body Composition Evaluation by Computerized Tomography in Pre-Liver Transplant Patients

Author: Herrera-Martínez, A., Calañas-Continente, A., Jurado, P.B. García, Ysamat, A. Benito, Rodero, G. Costán, Martin, A. Barrera, Opazo, R. Bahamondes, Román, Á. Rebollo, Moreno, P. Moreno, and Moreno, M. A. Gálvez
Published: 2016
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489. Uso de las aguas residuales municipales en irrigacion agricola

Author: Herrera Martinez, Luis Raul
Subjects: Aguas residuales, Alcantarillado, Ciencias Físico-Matemáticas e Ingenierías
Published: 1999

490. Guadua angustifolia frames' performance when stiffened with precast adobe panels

Author: Herrera Martinez, Juan Carlos, Takeuchi Tam, Caori Patricia, Herrera Martinez, Juan Carlos, and Takeuchi Tam, Caori Patricia
Abstract: Studying the structural behaviour of adobe systems in Colombia became extremely relevant after the 1999 earthquake in Armenia due to these systems' good performance during seismic events. These studies were aimed at modernising adobe house construction (by increased use of technology) and providing minimum requirements for them having a suitable degree of seismic resistance, thereby avoiding their collapse. Besides, if it is taken into account that guadua (the main material used in these systems) represents a cheap and profitable material which is socially and culturally-accepted in most of the country, then one has an alternative, unconventional material available which may be suitably used in constructing cheap, functional and safe housing (its limitations and best use having been identified). The foregoing gave rise to the present investigation in which an experimental evaluation was made of a guadua frame system using two types of prefabricated panels in adobe, under horizontal load. Two fullscale frames were built with guadua at the Universidad Nacional de Colombia's School of Engineering in Bogota; the frames' ability to dissipate energy and support inbuilt rigidity (by stiffening them with precast adobe) was tested and strength-deformation curves were experimentally found. Extremely encouraging results were obtained as drift was reduced by roughly 50% and the system's resistance was increased by more than 40%. Mathematical models were also constructed for comparing experimental results with analytical ones., Después del sismo de 1999 en Armenia, el estudio del comportamiento estructural de los sistemas de bahareque en Colombia toma relevancia debido al buen comportamiento que éstos presentaron ante el evento sísmico. Los estudios buscaban la tecnificación en la construcción de viviendas en bahareque y brindar los requisitos mínimos para obtener un grado adecuado de sismorresistencia y evitar así el colapso; además si se tiene en cuenta que la guadua es un material económico y rentable, social y culturalmente aceptado en una amplia región del país, se estaría en presencia de un material alternativo y no convencional que con la identificación de sus limitaciones y un adecuado uso permitiría su implementación en la fabricación de viviendas económicas, funcionales y seguras. Lo anterior motivó la presente investigación, en donde se hizo una evaluación experimental de un sistema de pórtico en guadua escala 1:1 rigidizado mediante la adición de dos tipos de páneles prefabricados de bahareque y ensayado ante cargas horizontales. Se halló la capacidad de disipar energía del pórtico y el aporte a la rigidez al adicionar los páneles, obteniendo resultados bastante alentadores, en donde se redujeron derivas en aproximadamente un 50% y se aumentó la resistencia del sistema en más de un 40%. Paralelamente, se realizaron modelos matemáticos para comparar resultados experimentales con resultados analíticos. Los modelos experimentales fueron construidos y ensayados en el Laboratorio de Materiales de la Facultad de Ingeniería de la Universidad Nacional de Colombia.
Published: 2009

491. High-accuracy 233U(n, f ) cross-section measurement at the white-neutron source n TOF from near-thermal to 1 MeV neutron energy

Author: 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, Sarchiapone, L., Savvidis, I., Konovalov, V., Stephan, C., Tagliente, G., Krticka, M., Rudolf, G., Kossionides, E., Rullhusen, P., Leeb, H., Salgado, J., Capote, R., Cano-Ott, D., Mengoni, A., Calviño Tavares, Francisco, Milazzo, P.M., Berthoumieux, E., Massimi, C., Berthier, B., Mastinu, P., Belloni, F., Lampoudis, C., Marrone, S., Becvár, F., Martínez, T., Baumann, P., Badurek, G., Audouin, L., Carrapiço, C., Marganiec, J., Lukic, S., Lozano, M., Santos, C., Lopes, I., Lindote, A., Taín Enríquez, José Luis, Tassan-Got, L., Assimakopoulos, P.A., Kadi, Y., Calviani, M., Karadimos, D., Praena, J., Karamanis, D., Abbondanno, U., Ketlerov, V., Aerts, G., Kerveno, M., Álvarez, H., Koehler, P., Álvarez-Velarde, F., Andriamonje, S., Andrzejewski, J., Vlachoudis, V., Vlastou, R., Villamarin, D., Vincente, M.C., Käppeler, F., Vaz, P., Jericha, E., Ventura, A., Igashira, M., Terlizzi, R., Herrera-Martinez, A., Vannini, G., Voss, F., Guerrero, C., Tavora, L., Gunsing, F., Goverdovski, A., Gramegna, F., Heil, M., Haas, B., Haight, R., Furman, W., Gonzalez-Romero, E., Goncalves, I., Ferrant, L., Ferrari, A., Ferreira-Marques, R., Fujiii, K., Dridi, W., Duran, I., Eleftheriadis, C., Embid-Segura, M., Domingo-Pardo, C., Dillmann, I., David, S., Cox, J., Dahlfors, M., Cortés Rossell, Guillem Pere, Couture, A., Chiaveri, E., Colonna, N., Cennini, P., Chepel, V., Rubbia, C., Rosetti, M., Plukis, A., Poch Parés, Agustí, Plag, R., Plompen, A., Rauscher, T., Reifarth, R., Pretel Sánchez, Carme, Quesada, J., Pigni, M.T., Perrot, L., Pavlopoulos, P., Papadopoulos, C., Paradela, C., Wisshak, K., Patronis, N., Pavlik, A., O'Brien, S., Pancin, J., Papachristodoulou, C., Mosconi, M., Moreau, C., Oberhummer, H., Walter, S., Neves, F., Wiescher, M., 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, Sarchiapone, L., Savvidis, I., Konovalov, V., Stephan, C., Tagliente, G., Krticka, M., Rudolf, G., Kossionides, E., Rullhusen, P., Leeb, H., Salgado, J., Capote, R., Cano-Ott, D., Mengoni, A., Calviño Tavares, Francisco, Milazzo, P.M., Berthoumieux, E., Massimi, C., Berthier, B., Mastinu, P., Belloni, F., Lampoudis, C., Marrone, S., Becvár, F., Martínez, T., Baumann, P., Badurek, G., Audouin, L., Carrapiço, C., Marganiec, J., Lukic, S., Lozano, M., Santos, C., Lopes, I., Lindote, A., Taín Enríquez, José Luis, Tassan-Got, L., Assimakopoulos, P.A., Kadi, Y., Calviani, M., Karadimos, D., Praena, J., Karamanis, D., Abbondanno, U., Ketlerov, V., Aerts, G., Kerveno, M., Álvarez, H., Koehler, P., Álvarez-Velarde, F., Andriamonje, S., Andrzejewski, J., Vlachoudis, V., Vlastou, R., Villamarin, D., Vincente, M.C., Käppeler, F., Vaz, P., Jericha, E., Ventura, A., Igashira, M., Terlizzi, R., Herrera-Martinez, A., Vannini, G., Voss, F., Guerrero, C., Tavora, L., Gunsing, F., Goverdovski, A., Gramegna, F., Heil, M., Haas, B., Haight, R., Furman, W., Gonzalez-Romero, E., Goncalves, I., Ferrant, L., Ferrari, A., Ferreira-Marques, R., Fujiii, K., Dridi, W., Duran, I., Eleftheriadis, C., Embid-Segura, M., Domingo-Pardo, C., Dillmann, I., David, S., Cox, J., Dahlfors, M., Cortés Rossell, Guillem Pere, Couture, A., Chiaveri, E., Colonna, N., Cennini, P., Chepel, V., Rubbia, C., Rosetti, M., Plukis, A., Poch Parés, Agustí, Plag, R., Plompen, A., Rauscher, T., Reifarth, R., Pretel Sánchez, Carme, Quesada, J., Pigni, M.T., Perrot, L., Pavlopoulos, P., Papadopoulos, C., Paradela, C., Wisshak, K., Patronis, N., Pavlik, A., O'Brien, S., Pancin, J., Papachristodoulou, C., Mosconi, M., Moreau, C., Oberhummer, H., Walter, S., Neves, F., and Wiescher, M.
Abstract: The 233U(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 233U(n,f ) cross section has been determined relative to a reference sample of 235U(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 agreementwith 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 233U fission cross section and for improving the reliability of databases needed for the design of new energy systems based on the Th/U cycle., Postprint (published version)
Published: 2009

492. The measurement of the Pb-206(n,gamma) cross section and stellar implications

Author: 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, Vaz, P., Ventura, A., Lozano, M., Villamarin, D., Vincente, M.C., Marganiec, J., Tassan-Got, L., Lukic, S., Tavora, L., Massimi, C., Terlizzi, R., Pavlik, A., Patronis, N., Perrot, L., Pavlopoulos, P., Cennini, P., Carrapico, C., Papadopoulos, C., Capote, R., Paradela, C., Cano-Ott, Daniel, Calviño Tavares, Francisco, Pancin, J., Calviani, M., Papachristodoulou, C., Oberhummer, H., Bisterzo, S., O'Brien, S., Berthoumieux, E., Becvar, F., Baumann, P., Chepel, V., Neves, F., Mosconi, M., Marrone, S., Milazzo, P.M., Mengoni, A., Mastinu, P., Vannini, G., Vlachoudis, V., Vlastou, R., Badurek, G., Kossionides, E., Domingo-Pardo, C., Krticka, M., Abbondanno, U., Lamboudis, C., Aerts, G., Leeb, H., Álvarez-Velarde, F., Lindote, A., Andriamonje, S., Lopes, I., Andrzejewski, J., Assimakopoulos, P., Audouin, L., Koehler, P., Wisshak, K., Kerveno, M., Karamanis, D., Walter, S., Karadimos, D., Wiescher, M., Herrera-Martinez, A., Voss, F., Igashira, M., Haight, R., Heil, M., Kaeppeler, F., Jericha, E., Kadi, Y., Guerrero, C., Haas, B., Gunsing, F., Gallino, R., Goncalves, I., Gonzalez-Romero, E., Gramegna, F., Ferrari, A., Ferreira-Marques, R., Fujii, K, Furman, W., Ferrant, L., Embid-Segura, M., Eleftheriadis, C., Dridi, W., Duran, I., David, S., Dillmann, I., Couture, A., Cox, J., Colonna, N., Cortés Rossell, Guillem Pere, Tain, J.L., Tagliente, G., Rullhusen, P., Salgado, J., Rubbia, C., Rudolf, G., Savvidis, I., Stephan, C., Santos, C., Sarchiapone, L., Reifarth, R., Rauscher, T., Quesada, J., Pretel Sánchez, Carme, Plompen, A., Alvarez, A., Plukis, A., Pigni, M.T., Plag, R., Poch Parés, Agustí, 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, Vaz, P., Ventura, A., Lozano, M., Villamarin, D., Vincente, M.C., Marganiec, J., Tassan-Got, L., Lukic, S., Tavora, L., Massimi, C., Terlizzi, R., Pavlik, A., Patronis, N., Perrot, L., Pavlopoulos, P., Cennini, P., Carrapico, C., Papadopoulos, C., Capote, R., Paradela, C., Cano-Ott, Daniel, Calviño Tavares, Francisco, Pancin, J., Calviani, M., Papachristodoulou, C., Oberhummer, H., Bisterzo, S., O'Brien, S., Berthoumieux, E., Becvar, F., Baumann, P., Chepel, V., Neves, F., Mosconi, M., Marrone, S., Milazzo, P.M., Mengoni, A., Mastinu, P., Vannini, G., Vlachoudis, V., Vlastou, R., Badurek, G., Kossionides, E., Domingo-Pardo, C., Krticka, M., Abbondanno, U., Lamboudis, C., Aerts, G., Leeb, H., Álvarez-Velarde, F., Lindote, A., Andriamonje, S., Lopes, I., Andrzejewski, J., Assimakopoulos, P., Audouin, L., Koehler, P., Wisshak, K., Kerveno, M., Karamanis, D., Walter, S., Karadimos, D., Wiescher, M., Herrera-Martinez, A., Voss, F., Igashira, M., Haight, R., Heil, M., Kaeppeler, F., Jericha, E., Kadi, Y., Guerrero, C., Haas, B., Gunsing, F., Gallino, R., Goncalves, I., Gonzalez-Romero, E., Gramegna, F., Ferrari, A., Ferreira-Marques, R., Fujii, K, Furman, W., Ferrant, L., Embid-Segura, M., Eleftheriadis, C., Dridi, W., Duran, I., David, S., Dillmann, I., Couture, A., Cox, J., Colonna, N., Cortés Rossell, Guillem Pere, Tain, J.L., Tagliente, G., Rullhusen, P., Salgado, J., Rubbia, C., Rudolf, G., Savvidis, I., Stephan, C., Santos, C., Sarchiapone, L., Reifarth, R., Rauscher, T., Quesada, J., Pretel Sánchez, Carme, Plompen, A., Alvarez, A., Plukis, A., Pigni, M.T., Plag, R., and Poch Parés, Agustí
Abstract: The neutron capture cross section of 206Pb has been measured at the CERN n TOF spectrometer using a setup of two C6D6 detectors. In the energy interval from 1 eV to 600 keV the cross section is dominated by resonances, which were analyzed via the R-matrix analysis code SAMMY. In the relevant energy ranges for stellar nucleosynthesis, i.e., at thermal energies of kT = 8 keV and kT = 23 keV, the present Maxwellian average cross section differs by 20% and 9% from the recommended values of Bao et al respectively. From the new cross section the s-abundance of 206Pb could be reliably determined as 70(4)%. This result is of importance in order to test and constrain r-process abundance calculations in the actinide region, because the r-process portion of 206Pb is dominated by α-back decays of short-lived transbismuth isotopes., Peer Reviewed, Postprint (published version)
Published: 2008

493. Nuclear physics for the Re/Os clock

Author: 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, Ventura, A., Villamarin, D., Lamboudis, C., Vincente, M.C., Vlachoudis, V., Lindote, A., Tassan-Got, L., Leeb, H., Tavora, L., Lozano, M., Vannini, G., Carrapico, C., Cennini, P., Cano-Ott, D., Capote, R., Becvar, F., Calviani, M., Tain, J.L., Tagliente, G., Rullhusen, P., Salgado, J., Stephan, C., Rubbia, C., Rudolf, G., Savvidis, I., Santos, C., Sarchiapone, L., Reifarth, R., Rauscher, T., Quesada, J., Plompen, A., Poch Parés, Agustí, Plukis, A., Pretel Sánchez, Carme, Paradela, C., Pavlopoulos, P., Perrot, L., Pigni, M.T., Papadopoulos, C., Pavlik, A., Patronis, N., Baumann, P., Badurek, G., Pancin, J., Audouin, L., Papachristodoulou, C., Assimakopoulos, P., Andriamonje, S., Oberhummer, H., Andrzejewski, J., O'Brien, S., Milazzo, P.M., Álvarez-Velarde, H., Neves, F., Álvarez, H., Abbondanno, U., Gallino, R., Calviño Tavares, Francisco, Mastinu, P., Massimi, C., Lopes, I., Marrone, S., Marganiec, J., Lukic, S., Vaz, P., Vlastou, R., Voss, F., Terlizzi, R., Karadimos, D., Mosconi, M., Karamanis, D., Heil, M., Kerveno, M., Kappeler, F, Koehler, P., Plag, R., Kossionides, E., Mengoni, A., Krticka, M., Fujii, K., Domingo-Pardo, C., Aerts, G., Kadi, Y., The n_TOF Collaboration, Jericha, E., Igashira, M., Wiescher, M., Herrera-Martinez, A., Wisshak, K., Gramegna, F., Walter, S., Guerrero, C., Goncalves, I., Gonzalez-Romero, E., Haight, R., Gunsing, F., Haas, B., Ferrari, A., Furman, W., Ferreira-Marques, R., Duran, I., Eleftheriadis, C., Embid-Segura, M., Ferrant, L., Dahlfors, M., David, S., Dillmann, I., Dridi, W., Cox, J., Couture, A., Cortés Rossell, Guillem Pere, Chepel, V., Colonna, N., 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, Ventura, A., Villamarin, D., Lamboudis, C., Vincente, M.C., Vlachoudis, V., Lindote, A., Tassan-Got, L., Leeb, H., Tavora, L., Lozano, M., Vannini, G., Carrapico, C., Cennini, P., Cano-Ott, D., Capote, R., Becvar, F., Calviani, M., Tain, J.L., Tagliente, G., Rullhusen, P., Salgado, J., Stephan, C., Rubbia, C., Rudolf, G., Savvidis, I., Santos, C., Sarchiapone, L., Reifarth, R., Rauscher, T., Quesada, J., Plompen, A., Poch Parés, Agustí, Plukis, A., Pretel Sánchez, Carme, Paradela, C., Pavlopoulos, P., Perrot, L., Pigni, M.T., Papadopoulos, C., Pavlik, A., Patronis, N., Baumann, P., Badurek, G., Pancin, J., Audouin, L., Papachristodoulou, C., Assimakopoulos, P., Andriamonje, S., Oberhummer, H., Andrzejewski, J., O'Brien, S., Milazzo, P.M., Álvarez-Velarde, H., Neves, F., Álvarez, H., Abbondanno, U., Gallino, R., Calviño Tavares, Francisco, Mastinu, P., Massimi, C., Lopes, I., Marrone, S., Marganiec, J., Lukic, S., Vaz, P., Vlastou, R., Voss, F., Terlizzi, R., Karadimos, D., Mosconi, M., Karamanis, D., Heil, M., Kerveno, M., Kappeler, F, Koehler, P., Plag, R., Kossionides, E., Mengoni, A., Krticka, M., Fujii, K., Domingo-Pardo, C., Aerts, G., Kadi, Y., The n_TOF Collaboration, Jericha, E., Igashira, M., Wiescher, M., Herrera-Martinez, A., Wisshak, K., Gramegna, F., Walter, S., Guerrero, C., Goncalves, I., Gonzalez-Romero, E., Haight, R., Gunsing, F., Haas, B., Ferrari, A., Furman, W., Ferreira-Marques, R., Duran, I., Eleftheriadis, C., Embid-Segura, M., Ferrant, L., Dahlfors, M., David, S., Dillmann, I., Dridi, W., Cox, J., Couture, A., Cortés Rossell, Guillem Pere, Chepel, V., and Colonna, N.
Abstract: Dating the age of the universe by the β-decay of 187Re (t1/2 = 41.2 Gyr) requires the accurate assessment of the s-process reaction flow. The daughter nucleus 187Os as well as its immediate s-only neighbor 186Os are shielded from the r-process. Therefore, the radiogenic contribution to 187Os can be derived via the local approximation of the s-process, which is well justified in this mass region: ( σ Ns)187 = ( σ Ns)186. Accordingly, accurate Maxwellianaveraged (n, γ ) cross sections have to be known for 186Os and 187Os over the full range of s-process temperatures. Because 187Os has low-lying excited states, which are significantly populated during the s-process, neutron captures on these excited states have to be properly taken into account. The input for the corresponding Hauser–Feshbach calculations can be constrained by deriving the strength functions from a detailed resonance analysis of the measured (n, γ ) cross sections as well as by an additional measurement of the inelastic scattering cross section for the first exited level, which dominates the competition between the capture and scattering channels. This contribution reports on measurements of the neutron capture cross sections of 186Os, 187Os and 188Os from the eV region to 1MeV at the CERN/n TOF facility and of the inelastic scattering cross section of 187Os around 30 keV at the Karlsruhe 3.7 MV Van de Graaff accelerator. Based on these results and on a detailed resonance analysis, improved Maxwellian-averaged cross sections were obtained for thermal energies between 5 keV and 100 keV. The implications of these results for the Re/Os clock are discussed., Peer Reviewed, Postprint (published version)
Published: 2008

494. THE Am-243 NEUTRON CAPTURE MEASUREMENT AT THE n_TOF FACILITY

Author: MENDOZA, E., primary, CANO-OTT, D., additional, GUERRERO, C., additional, ÁLVAREZ-VELARDE, F., additional, GARCÍA-RÍOS, A., additional, GONZÁLEZ-ROMERO, E., additional, MARTÍNEZ, T., additional, VILLAMARIN, D., additional, KADI, Y., additional, COLONNA, N., additional, MARRONE, S., additional, MEAZE, M. H., additional, TAGLIENTE, G., additional, TERLIZZI, R., additional, ABBONDANNO, U., additional, BELLONI, F., additional, FUJII, K., additional, MILAZZO, P. M., additional, MOREAU, C., additional, ANDRIAMONJE, S., additional, CALVIANI, M., additional, VLACHOUDIS, V., additional, CHIAVERI, E., additional, ANDRZEJEWSKI, J., additional, MARGANIEC, J., additional, ASSIMAKOPOULOS, P., additional, KARADIMOS, D., additional, KARAMANIS, D., additional, PAPACHRISTODOULOU, C., additional, PATRONIS, N., additional, AUDOUIN, L., additional, DAVID, S., additional, FERRANT, L., additional, ISAEV, S., additional, STEPHAN, C., additional, TASSAN-GOT, L., additional, BADUREK, G., additional, JERICHA, E., additional, LEEB, H., additional, OBERHUMMER, H., additional, PIGNI, M. T., additional, POCH, A., additional, BAUMANN, P., additional, KERVENO, M., additional, LUKIC, S., additional, RUDOLF, G., additional, BECVAR, F., additional, KRTICKA, M., additional, CALVINO, F., additional, CAPOTE, R., additional, FRAIS-KOELBL, H., additional, GRIESMAYER, E., additional, MENGONI, A., additional, LOZANO, M., additional, QUESADA, J. M., additional, CARRILLO DE ALBORNOZ, A., additional, TAVORA, L., additional, MARQUES, L., additional, SALGADO, J., additional, VAZ, P., additional, CENNINI, P., additional, DAHLFORS, M., additional, FERRARI, A., additional, GRAMEGNA, F., additional, HERRERA-MARTINEZ, A., additional, MASTINU, P., additional, PRAENA, J., additional, SARCHIAPONE, L., additional, WENDLER, H., additional, CHEPEL, V., additional, FERREIRA-MARQUES, R., additional, GONCALVES, I., additional, LINDOTE, A., additional, LOPES, I., additional, NEVES, F., additional, BERTHOUMIEUX, E., additional, DRIDI, W., additional, GUNSING, F., additional, AERTS, G., additional, PANCIN, J., additional, PERROT, L., additional, PLUKIS, A., additional, CORTES, G., additional, PRETEL, C., additional, COUTURE, A. J., additional, COX, J., additional, O'BRIEN, S., additional, WIESCHER, M., additional, DILLMAN, I., additional, HEIL, M., additional, KÄPPELER, F., additional, MOSCONI, M., additional, PLAG, R., additional, VOSS, F., additional, WALTER, S., additional, WISSHAK, K., additional, DOLFINI, R., additional, RUBBIA, C., additional, DOMINGO PARDO, C., additional, TAIN, J. L., additional, ELEFTHERIADIS, C., additional, LAMPOUDIS, C., additional, SAVVIDIS, I., additional, FURMAN, W., additional, KONOVALOV, V., additional, GOVERDOVSKI, A., additional, KETLEROV, V., additional, DURAN, I., additional, PARADELA, C., additional, ÁLVAREZ, H., additional, HAAS, B., additional, HAIGHT, R., additional, REIFARTH, R., additional, IGASHIRA, M., additional, KOEHLER, P., additional, KOSSIONIDES, E., additional, MASSIMI, C., additional, VANNINI, G., additional, OSHIMA, M., additional, PAPADOPOULOS, C., additional, VLASTOU, R., additional, PAVLIK, A., additional, PAVLOPOULOS, P., additional, PLOMPEN, A., additional, RULLHUSEN, P., additional, RAUSCHER, T., additional, ROSETTI, M., additional, and VENTURA, A., additional
Published: 2013
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495. The93Zr(n,γ) reaction up to 8 keV neutron energy

Author: Tagliente, G., primary, Milazzo, P. M., additional, Fujii, K., additional, Abbondanno, U., additional, Aerts, G., additional, Álvarez, H., additional, Alvarez-Velarde, F., additional, Andriamonje, S., additional, Andrzejewski, J., additional, Audouin, L., additional, Badurek, G., additional, Baumann, P., additional, Bečvář, F., additional, Belloni, F., additional, Berthoumieux, E., additional, Calviño, F., additional, Calviani, M., additional, Cano-Ott, D., additional, Capote, R., additional, Carrapiço, C., additional, Cennini, P., additional, Chepel, V., additional, Chiaveri, E., additional, Colonna, N., additional, Cortes, G., additional, Couture, A., additional, Dahlfors, M., additional, David, S., additional, Dillmann, I., additional, Domingo-Pardo, C., additional, Dridi, W., additional, Duran, I., additional, Eleftheriadis, C., additional, Embid-Segura, M., additional, Ferrari, A., additional, Ferreira-Marques, R., additional, Furman, W., additional, Goncalves, I., additional, Gonzalez-Romero, E., additional, Gramegna, F., additional, Guerrero, C., additional, Gunsing, F., additional, Haas, B., additional, Haight, R., additional, Heil, M., additional, Herrera-Martinez, A., additional, Jericha, E., additional, Käppeler, F., additional, Kadi, Y., additional, Karadimos, D., additional, Karamanis, D., additional, Kerveno, M., additional, Kossionides, E., additional, Krtička, M., additional, Lamboudis, C., additional, Leeb, H., additional, Lindote, A., additional, Lopes, I., additional, Lukic, S., additional, Marganiec, J., additional, Marrone, S., additional, Martínez, T., additional, Massimi, C., additional, Mastinu, P., additional, Mengoni, A., additional, Moreau, C., additional, Mosconi, M., additional, Neves, F., additional, Oberhummer, H., additional, O’Brien, S., additional, Papachristodoulou, C., additional, Papadopoulos, C., additional, Paradela, C., additional, Patronis, N., additional, Pavlik, A., additional, Pavlopoulos, P., additional, Perrot, L., additional, Pigni, M. T., additional, Plag, R., additional, Plompen, A., additional, Plukis, A., additional, Poch, A., additional, Praena, J., additional, Pretel, C., additional, Quesada, J., additional, Reifarth, R., additional, Rosetti, M., additional, Rubbia, C., additional, Rudolf, G., additional, Rullhusen, P., additional, Salgado, J., additional, Santos, C., additional, Sarchiapone, L., additional, Savvidis, I., additional, Stephan, C., additional, Tain, J. L., additional, Tassan-Got, L., additional, Tavora, L., additional, Terlizzi, R., additional, Vannini, G., additional, Vaz, P., additional, Ventura, A., additional, Villamarin, D., additional, Vincente, M. C., additional, Vlachoudis, V., additional, Vlastou, R., additional, Voss, F., additional, Walter, S., additional, Wiescher, M., additional, and Wisshak, K., additional
Published: 2013
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496. Measurement of the neutron-induced fission cross-section of 241Am at the time-of-flight facility n_TOF

Author: Belloni, F., primary, Calviani, M., additional, Colonna, N., additional, Mastinu, P., additional, Milazzo, P. M., additional, Abbondanno, U., additional, Aerts, G., additional, Álvarez, H., additional, Alvarez-Velarde, F., additional, Andriamonje, S., additional, Andrzejewski, J., additional, Audouin, L., additional, Badurek, G., additional, Barbagallo, M., additional, Baumann, P., additional, Bečvář, F., additional, Berthoumieux, E., additional, Calviño, F., additional, Cano-Ott, D., additional, Capote, R., additional, Carrapiço, C., additional, Cennini, P., additional, Chepel, V., additional, Chiaveri, E., additional, Cortes, G., additional, Couture, A., additional, Cox, J., additional, Dahlfors, M., additional, David, S., additional, Dillmann, I., additional, Domingo-Pardo, C., additional, Dridi, W., additional, Duran, I., additional, Eleftheriadis, C., additional, Embid-Segura, M., additional, Ferrari, A., additional, Ferreira-Marques, R., additional, Fujii, K., additional, Furman, W., additional, Goncalves, I., additional, Gonzalez-Romero, E., additional, Goverdovski, A., additional, Gramegna, F., additional, Guerrero, C., additional, Gunsing, F., additional, Haas, B., additional, Haight, R., additional, Heil, M., additional, Herrera-Martinez, A., additional, Igashira, M., additional, Jericha, E., additional, Käppeler, F., additional, Kadi, Y., additional, Karadimos, D., additional, Karamanis, D., additional, Kerveno, M., additional, Koehler, P., additional, Kossionides, E., additional, Krtička, M., additional, Lamboudis, C., additional, Leeb, H., additional, Lindote, A., additional, Lopes, I., additional, Lozano, M., additional, Lukic, S., additional, Marganiec, J., additional, Marrone, S., additional, Martínez, T., additional, Massimi, C., additional, Meaze, M. H., additional, Mengoni, A., additional, Moreau, C., additional, Mosconi, M., additional, Neves, F., additional, Oberhummer, H., additional, O’Brien, S., additional, Papachristodoulou, C., additional, Papadopoulos, C., additional, Paradela, C., additional, Patronis, N., additional, Pavlik, A., additional, Pavlopoulos, P., additional, Perrot, L., additional, Pigni, M. T., additional, Plag, R., additional, Plompen, A., additional, Plukis, A., additional, Poch, A., additional, Praena, J., additional, Pretel, C., additional, Quesada, J., additional, Rauscher, T., additional, Reifarth, R., additional, Rosetti, M., additional, Rubbia, C., additional, Rudolf, G., additional, Rullhusen, P., additional, Salgado, J., additional, Santos, C., additional, Sarchiapone, L., additional, Savvidis, I., additional, Stephan, C., additional, Tagliente, G., additional, Tain, J. L., additional, Tarrio, D., additional, Tassan-Got, L., additional, Tavora, L., additional, Terlizzi, R., additional, Vannini, G., additional, Vaz, P., additional, Ventura, A., additional, Villamarin, D., additional, Vincente, M. C., additional, Vlachoudis, V., additional, Vlastou, R., additional, Voss, F., additional, Walter, S., additional, Wiescher, M., additional, and Wisshak, K., additional
Published: 2013
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497. Neutron reactions and nuclear cosmo-chronology

Author: 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, Tagliente, G., Taín Enríquez, José Luis, Ketlerov, V., Tassan-Got, L., Tavora, L., Konovalov, V., Salgado, J., Koehler, P., Sarchiapone, L., Krticka, M., Savvidis, I., Rauscher, T., Reifarth, R., Plompen, A., Perrot, L., Pavlopoulos, P., Papadopoulos, C., Paradela, C., Patronis, N., Pavlik, A., O'Brien, S., Baumann, P., Pancin, J., Papachristodoulou, C., Neves, F., Moreau, C., Oshima, M., Oberhummer, H., Berthoumieux, E., Becvar, F., Mastinu, P.F., Milazzo, P.M., Badurek, G., Marques, L., Audouin, L., Marrone, S., Assimakopoulos, P., Lukic, S., Andrzejewski, J., Marganiec, J., Kossionides, E., Andriamonje, S., Álvarez-Velarde, F., Álvarez-Pol, H., Bisterzo, S., Lozano, M, Lopes, I., Lindote, A., Leeb, H., Lamboudis, C., Stephan, C., Vannini, G., Vaz, P., Abbondanno, U., Isaev, S., Mosconi, M., Jericha, E., Heil, M., Kadi, Y., Kappeler, F., Karamanis, D., Mengoni, A., Karadimos, D., Plag, R., Kerveno, M., Fujii, K., Aerts, G., Terlizzi, R., Wendler, H., Wiescher, M., Voss, F., Walter, S., Igashira, M., Vlachoudis, V., Herrera-Martinez, A., Vlastou, R., Haight, R., Villamarin, D., Haas, B., Vincente, M.C., Wisshak, K., Goverdovski, A., Ventura, A., Gramegna, F., Goncalves, I., Gonzalez-Romero, E., Gunsing, F., Griesmayer, E., Guerrero, C., Embid-Segura, M., Ferrari, A., Ferrant, L., Domingo-Pardo, C., Dridi, W., Duran, I., Eleftheriadis, C., Dahlfors, M., David, S., Dillmann, I., Dolfini, R., Cox, J., Couture, A., Colonna, N., Chiaveri, E., Cortés Rossell, Guillem Pere, Cennini, P., Chepel, V., Capote, R., Carrillo de Albornoz, A., Calviño Tavares, Francisco, Cano-Ott, D., Rullhusen, P., Rudolf, G., Pretel Sánchez, Carme, Quesada, J., Plukis, A., Poch Parés, Agustí, Rosetti, M., Rubbia, C., 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, Tagliente, G., Taín Enríquez, José Luis, Ketlerov, V., Tassan-Got, L., Tavora, L., Konovalov, V., Salgado, J., Koehler, P., Sarchiapone, L., Krticka, M., Savvidis, I., Rauscher, T., Reifarth, R., Plompen, A., Perrot, L., Pavlopoulos, P., Papadopoulos, C., Paradela, C., Patronis, N., Pavlik, A., O'Brien, S., Baumann, P., Pancin, J., Papachristodoulou, C., Neves, F., Moreau, C., Oshima, M., Oberhummer, H., Berthoumieux, E., Becvar, F., Mastinu, P.F., Milazzo, P.M., Badurek, G., Marques, L., Audouin, L., Marrone, S., Assimakopoulos, P., Lukic, S., Andrzejewski, J., Marganiec, J., Kossionides, E., Andriamonje, S., Álvarez-Velarde, F., Álvarez-Pol, H., Bisterzo, S., Lozano, M, Lopes, I., Lindote, A., Leeb, H., Lamboudis, C., Stephan, C., Vannini, G., Vaz, P., Abbondanno, U., Isaev, S., Mosconi, M., Jericha, E., Heil, M., Kadi, Y., Kappeler, F., Karamanis, D., Mengoni, A., Karadimos, D., Plag, R., Kerveno, M., Fujii, K., Aerts, G., Terlizzi, R., Wendler, H., Wiescher, M., Voss, F., Walter, S., Igashira, M., Vlachoudis, V., Herrera-Martinez, A., Vlastou, R., Haight, R., Villamarin, D., Haas, B., Vincente, M.C., Wisshak, K., Goverdovski, A., Ventura, A., Gramegna, F., Goncalves, I., Gonzalez-Romero, E., Gunsing, F., Griesmayer, E., Guerrero, C., Embid-Segura, M., Ferrari, A., Ferrant, L., Domingo-Pardo, C., Dridi, W., Duran, I., Eleftheriadis, C., Dahlfors, M., David, S., Dillmann, I., Dolfini, R., Cox, J., Couture, A., Colonna, N., Chiaveri, E., Cortés Rossell, Guillem Pere, Cennini, P., Chepel, V., Capote, R., Carrillo de Albornoz, A., Calviño Tavares, Francisco, Cano-Ott, D., Rullhusen, P., Rudolf, G., Pretel Sánchez, Carme, Quesada, J., Plukis, A., Poch Parés, Agustí, Rosetti, M., and Rubbia, C.
Abstract: The -decay of 187Re (t1/2 = 42.3 Gyr) represents a suited cosmo-chronometer for the age of the r-process abundances, since the radiogenic part of the daughter isotope 187Os is defined by the difference between the solar 187Os abundance and s-process contribution to 187Os. The latter component can be determined via the s-process systematics based on the stellar neutron capture cross sections of 186Os and 187Os. The laboratory cross section of 187Os requires a significant correction for the effect of the low-lying excited state at 9.75 keV, which is strongly populated under stellar conditions. This theoretical correction can be improved by an experimental cross section for inelastic scattering to the 9.75 keV state. High resolution time-of-flight measurements of (n, ) cross sections of 186,187,188Os from 1 eV to 1 MeV at CERN n TOF facility are reported. The inferred stellar cross sections differ from previously recommended values. In addition, the inelastic scattering cross section has been measured at 30 keV neutron energy via time-of-flight at the Karlsruhe 3.7 MV Van de Graaff. The implications of these results for the Re/Os clock are discussed., Peer Reviewed, Postprint (published version)
Published: 2007

498. Status and outlook of the neutron time-of-flight facility n_TOF at CERN

Author: Universitat Politècnica de Catalunya. Departament de Física, 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, Gunsing, Frank, Abbondanno, U, Aerts, G, Alvarez, H, Alvarez Velarde, Francisco, Andriamonje, S, Assimakopoulos, P, Audouin, Ludmila, Badurek, G., Dolfini, R., Ferrant, L., Domingo Pardo, César, Dridi, W., Calviño Tavares, Francisco, Cortés Rossell, Guillem Pere, Duran, I., Ferrari, A., Ferreira-Marques, R., Frais-Koelbl, H., Furman, W., Fujii, K, Jericha, E., Goncalves, I., Gonzalez Romero, E., Goverdovski, A., Karamanis, D., Gramegna, F., Griesmayer, E., Haas, B., Haight, R., Kerveno, M., Herrera Martinez, Aura, Igashira, M., Isaev, S., Kappeler, F, Kadi, Y, Karadimos, D., Ketlerov, V., Koehler, Paul E., Konovalov, V., Kossionides, E., Krticka, M., Mengoni, A, Lampoudis, C., Leeb, H., Lindote, A., Neves, F., Lopes, I., Marrone, S., Lukic, S., Marganiec, J., Marques, L., Oberhummer, H., Martínez, T., Mastinu, P., Massimi, Cristian, Milazzo, P.M., Moreau, C, Mosconi, M., O'Brien, S., Oshima, M., Pancin, J., Papachristodoulou, C., Papadopoulos, C., Rauscher, Thomas, Paradela, C., Patronis, N., Pavlik, A., Rudolf, G., Pavlopoulos, P., Perrot, L., Pigni, M.T., Plag, R., Plompen, A., Plukis, A., Rullhusen, P., Pretel Sánchez, Carme, Poch Parés, Agustí, Quesada, J., Reifarth, R., Rubbia, C., Rosetti, M., Sarchiapone, L., Salgado, J., Savvidis, I., Stephan, C., Tagliente, G., Walter, S., Tassan-Got, L., Tavora, L., Becvar, F., Terlizzi, R., Vannini, Gianni, Vaz, P., Ventura, Alberto, Villamarin, D., Vincente, M.C., Berthoumieux, Eric, Vlastou, R., Vlachoudis, V., Voss, F., Wendler, H., Wiescher, M., Wisshak, K., Cano-Ott, D, Capote Noy, Roberto, Albornoz, A.C. de, Cennini, P., Eleftheriadis, C., Chepel, V., Chiaveri, E., Colonna, Nicola, Couture, A., Cox, J., Dahlfors, M., David, S., Dillmann, Iris, Lozano, Manuel, Guerrero, Carlos, Taín Enríquez, José Luis, Universitat Politècnica de Catalunya. Departament de Física, 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, Gunsing, Frank, Abbondanno, U, Aerts, G, Alvarez, H, Alvarez Velarde, Francisco, Andriamonje, S, Assimakopoulos, P, Audouin, Ludmila, Badurek, G., Dolfini, R., Ferrant, L., Domingo Pardo, César, Dridi, W., Calviño Tavares, Francisco, Cortés Rossell, Guillem Pere, Duran, I., Ferrari, A., Ferreira-Marques, R., Frais-Koelbl, H., Furman, W., Fujii, K, Jericha, E., Goncalves, I., Gonzalez Romero, E., Goverdovski, A., Karamanis, D., Gramegna, F., Griesmayer, E., Haas, B., Haight, R., Kerveno, M., Herrera Martinez, Aura, Igashira, M., Isaev, S., Kappeler, F, Kadi, Y, Karadimos, D., Ketlerov, V., Koehler, Paul E., Konovalov, V., Kossionides, E., Krticka, M., Mengoni, A, Lampoudis, C., Leeb, H., Lindote, A., Neves, F., Lopes, I., Marrone, S., Lukic, S., Marganiec, J., Marques, L., Oberhummer, H., Martínez, T., Mastinu, P., Massimi, Cristian, Milazzo, P.M., Moreau, C, Mosconi, M., O'Brien, S., Oshima, M., Pancin, J., Papachristodoulou, C., Papadopoulos, C., Rauscher, Thomas, Paradela, C., Patronis, N., Pavlik, A., Rudolf, G., Pavlopoulos, P., Perrot, L., Pigni, M.T., Plag, R., Plompen, A., Plukis, A., Rullhusen, P., Pretel Sánchez, Carme, Poch Parés, Agustí, Quesada, J., Reifarth, R., Rubbia, C., Rosetti, M., Sarchiapone, L., Salgado, J., Savvidis, I., Stephan, C., Tagliente, G., Walter, S., Tassan-Got, L., Tavora, L., Becvar, F., Terlizzi, R., Vannini, Gianni, Vaz, P., Ventura, Alberto, Villamarin, D., Vincente, M.C., Berthoumieux, Eric, Vlastou, R., Vlachoudis, V., Voss, F., Wendler, H., Wiescher, M., Wisshak, K., Cano-Ott, D, Capote Noy, Roberto, Albornoz, A.C. de, Cennini, P., Eleftheriadis, C., Chepel, V., Chiaveri, E., Colonna, Nicola, Couture, A., Cox, J., Dahlfors, M., David, S., Dillmann, Iris, Lozano, Manuel, Guerrero, Carlos, and Taín Enríquez, José Luis
Abstract: The neutron time-of-flight facility n_TOF at CERN, fully operational since 2002, combines a high instantaneous neutron flux with high energy resolution. The wide energy range and the high neutron flux per time-of-flight burst result in a much enhanced signal to background ratio for neutron capture of radioactive isotopes and makes this facility well suited for the measurement of high quality neutron-induced reaction cross-sections. Neutrons are created by spallation reactions induced by a pulsed 20 GeV/c proton beam impinging on a lead target. A 5 cm water slab surrounding the lead target serves as a coolant and at the same time as a moderator of the spallation neutron spectrum, providing a wide energy spectrum from 0.1 eV to about 250 MeV. By the end of 2005, a first phase of data taking has been successfully terminated. Fission and capture experiments have been performed on a variety of isotopes of interest for nuclear astrophysics, advanced nuclear technologies and for basic nuclear physics. The instrumentation developed for this facility consists of parallel plate avalanche counter and fission ionization chamber detectors for the fission experiments and of low mass C6D6 detectors and a 4 pi BaF2 total absorption calorimeter for capture experiments. A new data acquisition system, based on sampling of the detector signals, has been developed to cope with the high count rates and to minimize the effective dead time to only a few tens of nanosecond. A second phase of data taking is planned to start in 2007, after an upgrade of the spallation target. On the longer term, the construction of a flight path at 20 m resulting in an increased neutron flux of about a factor of 100 opens new possibilities., Postprint (published version)
Published: 2007

499. Resonance capture cross section of Pb-207

Author: 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, Sarchiapone, L., Savvidis, I., Kerveno, M., Stephan, C., Tagliente, G., Koehler, P., Rubbia, C., Ketlerov, V., Rudolf, G., Kossionides, E., Rullhusen, P., Goncalves, I., Gallino, R., Ferreira-Marques, R., Fitzpatrick, L., Frais-Koelbl, H., Fujii, K., Eleftheriadis, C., Embid-Segura, M., Ferrant, L., Ferrari, A., Poch Parés, Agustí, Duran, I., Dridi, W., Dolfini, R., David, S., Dillmann, I., Cox, J., Dahlfors, M., Colonna, N., Couture, A., Chiaveri, E., Perrot, L., Cortés Rossell, Guillem Pere, Rosetti, M., Reifarth, R., Plompen, A., Plag, R., Quesada, J., Rauscher, T., Pretel Sánchez, Carme, Plukis, A., Pavlopoulos, P., Pavlik, A., Patronis, N., Mosconi, M., Pancin, J., Wisshak, K., Papachristodoulou, C., Wiescher, M., Papadopoulos, C., Paradela, C., The nTOF Collaborat, Oberhummer, H., Oshima, M., O'Brien, S., Wendler, H., Moreau, C., Milazzo, P.M., Neves, F., Voss, F., Cennini, P., Carrapico, C., Mastinu, P., Capote, R., Mengoni, A., Cano-Ott, D., Marganiec, J., Bisterzo, S., Konovalov, V., Marrone, S., Calviño Tavares, Francisco, Lozano, M., Berthoumieux, E., Lukic, S., Becvar, F., Baumann, P., Badurek, G., Chepel, V., Lopes, I., Salgado, J., Lindote, A., Leeb, H., Lamboudis, C., Krticka, M., Taín Enríquez, José Luis, Tassan-Got, L., Audouin, L., Isaev, S., Domingo-Pardo, C., Jericha, E., Abbondanno, U., Kadi, Y., Aerts, G., Kaeppeler, F., Álvarez-Pol, H., Karamanis, D., Álvarez-Velarde, F., Karadimos, D., Andriamonje, S., Andrzejewski, J., Assimakopoulos, P., Vlachoudis, V., Vlastou, R., Villamarin, D., Vincente, M.C., Igashira, M., Vaz, P., Herrera-Martinez, A., Ventura, A., Heil, M., Terlizzi, R., Haight, R., Vannini, G., Walter, S., Gramegna, F., Tavora, L., Griesmayer, E., Gonzalez-Romero, E., Goverdovski, A., Haas, B., Guerrero, C., Gunsing, F., Furman, W., 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, Sarchiapone, L., Savvidis, I., Kerveno, M., Stephan, C., Tagliente, G., Koehler, P., Rubbia, C., Ketlerov, V., Rudolf, G., Kossionides, E., Rullhusen, P., Goncalves, I., Gallino, R., Ferreira-Marques, R., Fitzpatrick, L., Frais-Koelbl, H., Fujii, K., Eleftheriadis, C., Embid-Segura, M., Ferrant, L., Ferrari, A., Poch Parés, Agustí, Duran, I., Dridi, W., Dolfini, R., David, S., Dillmann, I., Cox, J., Dahlfors, M., Colonna, N., Couture, A., Chiaveri, E., Perrot, L., Cortés Rossell, Guillem Pere, Rosetti, M., Reifarth, R., Plompen, A., Plag, R., Quesada, J., Rauscher, T., Pretel Sánchez, Carme, Plukis, A., Pavlopoulos, P., Pavlik, A., Patronis, N., Mosconi, M., Pancin, J., Wisshak, K., Papachristodoulou, C., Wiescher, M., Papadopoulos, C., Paradela, C., The nTOF Collaborat, Oberhummer, H., Oshima, M., O'Brien, S., Wendler, H., Moreau, C., Milazzo, P.M., Neves, F., Voss, F., Cennini, P., Carrapico, C., Mastinu, P., Capote, R., Mengoni, A., Cano-Ott, D., Marganiec, J., Bisterzo, S., Konovalov, V., Marrone, S., Calviño Tavares, Francisco, Lozano, M., Berthoumieux, E., Lukic, S., Becvar, F., Baumann, P., Badurek, G., Chepel, V., Lopes, I., Salgado, J., Lindote, A., Leeb, H., Lamboudis, C., Krticka, M., Taín Enríquez, José Luis, Tassan-Got, L., Audouin, L., Isaev, S., Domingo-Pardo, C., Jericha, E., Abbondanno, U., Kadi, Y., Aerts, G., Kaeppeler, F., Álvarez-Pol, H., Karamanis, D., Álvarez-Velarde, F., Karadimos, D., Andriamonje, S., Andrzejewski, J., Assimakopoulos, P., Vlachoudis, V., Vlastou, R., Villamarin, D., Vincente, M.C., Igashira, M., Vaz, P., Herrera-Martinez, A., Ventura, A., Heil, M., Terlizzi, R., Haight, R., Vannini, G., Walter, S., Gramegna, F., Tavora, L., Griesmayer, E., Gonzalez-Romero, E., Goverdovski, A., Haas, B., Guerrero, C., Gunsing, F., and Furman, W.
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., Peer Reviewed, Postprint (published version)
Published: 2006

500. The data acquisition system of the neutron time-of-flight facility n_TOF at CERN

Author: Abbondanno, U, Aerts, G, Alvarez, F, Alvarez, H, Andriamonje, S, Andrzejewski, J, Badurek, G, Baumann, P, Becvar, F, Benlliure, J, Berthomieux, E, Betev, B, Calvino, F, Cano-Ott, D, Capote, R, Cennini, P, Chepel, V, Chiaveri, E, Colonna, N, Cortes, G, Cortina, D, Couture, A, Cox, J, Dababneh, S, David, S, Dolfini, R, Domingo-Pardo, C, Duran, I, Embid-Segura, M, Ferrant, L, Ferrari, A, Ferreira-Marques, R, Frais-Koelbl, H, Furman, W, Goncalves, I, Gonzalez-Romero, E, Goverdovski, A, Gramegna, F, Griesmayer, E, Gunsing, F, Haas, B, Haight, R, Heil, M, Herrera-Martinez, A, Isaev, S, Jericha, E, Kadi, Y, Kappeler, F, Kerveno, M, Ketlerov, V, Koehler, P E, Konovalov, V, Krticka, M, Leeb, H, Lindote, A, Lopes, M I, Lozano, M, Lukic, S, Marganiec, J, Marrone, S, Martinez-Val, J, Mastinu, P, Mengoni, A, Milazzo, P M, Molina-Coballes, A, Moreau, C, Mosconi, M, Neves, F, Oberhummer, H, O'Brien, S, Pancin, J, Papaevangelou, T, Paradela, C, Pavlik, A, Pavlopoulos, P, Perlado, J M, Perrot, L, Peskov, Vladmir, Plag, R, Plompen, A, Plukis, A, Poch, A, Policarpo, A, Pretel, C, Quesada, J M, Rapp, W, Rauscher, T, Reifarth, R, Rosetti, M, Rubbia, C, Rudolf, G, Rullhusen, P, Salgado, J, Schafer, E, Soares, J C, Stephan, C, Tagliente, G, Tain, J L, Tassan-Got, L, Tavora, L M N, Terlizzi, R, Vannini, G, Vaz, P, Ventura, A, Villamarin-Fernandez, D, Vincente-Vincente, M, Vlachoudis, V, Voss, F, Wendler, H, Wiescher, M, Wisshak, K, Abbondanno, U, Aerts, G, Alvarez, F, Alvarez, H, Andriamonje, S, Andrzejewski, J, Badurek, G, Baumann, P, Becvar, F, Benlliure, J, Berthomieux, E, Betev, B, Calvino, F, Cano-Ott, D, Capote, R, Cennini, P, Chepel, V, Chiaveri, E, Colonna, N, Cortes, G, Cortina, D, Couture, A, Cox, J, Dababneh, S, David, S, Dolfini, R, Domingo-Pardo, C, Duran, I, Embid-Segura, M, Ferrant, L, Ferrari, A, Ferreira-Marques, R, Frais-Koelbl, H, Furman, W, Goncalves, I, Gonzalez-Romero, E, Goverdovski, A, Gramegna, F, Griesmayer, E, Gunsing, F, Haas, B, Haight, R, Heil, M, Herrera-Martinez, A, Isaev, S, Jericha, E, Kadi, Y, Kappeler, F, Kerveno, M, Ketlerov, V, Koehler, P E, Konovalov, V, Krticka, M, Leeb, H, Lindote, A, Lopes, M I, Lozano, M, Lukic, S, Marganiec, J, Marrone, S, Martinez-Val, J, Mastinu, P, Mengoni, A, Milazzo, P M, Molina-Coballes, A, Moreau, C, Mosconi, M, Neves, F, Oberhummer, H, O'Brien, S, Pancin, J, Papaevangelou, T, Paradela, C, Pavlik, A, Pavlopoulos, P, Perlado, J M, Perrot, L, Peskov, Vladmir, Plag, R, Plompen, A, Plukis, A, Poch, A, Policarpo, A, Pretel, C, Quesada, J M, Rapp, W, Rauscher, T, Reifarth, R, Rosetti, M, Rubbia, C, Rudolf, G, Rullhusen, P, Salgado, J, Schafer, E, Soares, J C, Stephan, C, Tagliente, G, Tain, J L, Tassan-Got, L, Tavora, L M N, Terlizzi, R, Vannini, G, Vaz, P, Ventura, A, Villamarin-Fernandez, D, Vincente-Vincente, M, Vlachoudis, V, Voss, F, Wendler, H, Wiescher, M, and Wisshak, K
Abstract: The n_TOF facility at CERN has been designed for the measurement of neutron capture, fission and (n, xn) cross-sections with high accuracy. This requires a flexible and-due to the high instantaneous neutron flux-almost dead time free data acquisition system. A scalable and versatile data solution has been designed based on 8-bit flash-ADCs with sampling rates up to 2 GHz and 8 Mbyte memory buffer. The software is written in C and C++ and is running on PCs equipped with RedHat Linux.
Published: 2005
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