Search

Your search keyword '"Voss, F."' showing total 19 results
Start Over Author "Voss, F." Topic neutron capture
19 results on '"Voss, F."'

2. Neutron Capture Measurements on Minor Actinides at the n_TOF Facility at CERN: Past, Present and Future

Author

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

Subjects
nuclear waste, ads, cross section, actinides, plutonium, tac, generation iv, total absorption calorimeter, transmutation, nuclear data, nuclear energy, americium, uranium, accelerator driven system, n_tof, barium fluoride, nuclear reactor, neutron capture
Abstract

The successful development of advanced nuclear systems for sustainable energy production and nuclear waste management depends on high quality nuclear data libraries. Recent sensitivity studies and reports [1-3] have identified the need for substantially improving the accuracy of neutron cross-section data for minor actinides. The n_TOF collaboration has initiated an ambitious experimental program for the measurement of neutron capture cross sections of minor actinides. Two experimental setups have been constructed for this purpose: a Total Absorption Calorimeter (TAC) [4] for measuring neutron capture cross-sections of low-mass and/or radioactive samples and a set of two low neutron sensitivity C(6)D(6) detectors for the less radioactive materials. Journal of the Korean Physical Society

Published
2011

3. Study of Photon Strength Function of Actinides: the Case of (235)U, (238)Np and (241)Pu

Author

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

Subjects
pygmy, parameter, resonance, photon/gamma strength functions, spectra, nuclei, scissor mode, n_tof, tac, total absorption calorimeter, systematics, neutron capture
Abstract

The decay from excited levels in medium and heavy nuclei can be described in a statistical approach by means of Photon Strength Functions and Level Density distributions. The study of electromagnetic cascades following neutron capture based on the use of high efficiency detectors has been shown to be well suited for probing the properties of the Photon Strength Function of heavy (high level density) and/or radioactive (high background) nuclei. In this work we have investigated for the first time the validity of the recommended PSF of actinides, in particular (235)U, (238)Np and (241)Pu. Our study includes the search for resonance structures in the PSF below S(n) and draws conclusions regarding their existence and their characteristics in terms of energy, width and electromagnetic nature. Journal of the Korean Physical Society

Published
2011

4. Neutron reactions and nuclear cosmo-chronology

Author

Mosconi, M., Heil, M., Mengoni, A., Plag, R., Fujii, K., Gallino, R., Aerts, G., Terlizzi, R., Abbondanno, U., Rosetti, M., Marrone, S., Andrzejewski, J., Assimakopoulos, P., Audouin, L., Badurek, G., Baumann, P., Berthoumieux, E., Bisterzo, S., Calvi?o, F., Cano-Ott, D., Capote, R., Dillman, I., Carrillo de Albornoz, A., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Couture, A., Cox, J., Dahlfors, M., David, S., Dolfini, R., Domingo Pardo, C., Dridi, W., Duran, I., Eleftheriadis, C., Embid-Segura, M., Ferrant, L., Ferrari, A., Ferreira-Marques, R., Haight, R., Fitzpatrick, L., Frais-Koelbl, H., Furman, W., Goncalves, I., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Guerrero, C., Gunsing, F., Herrera-Martinez, A., Haas, B., Igashira, M., Isaev, S., Jericha, E., Kadi, Y., Karamanis, D., Karadimos, D., Kerveno, M., Ketlerov, V., Mastinu, P., Koehler, P., Konovalov, V., Kossionides, E., Lamboudis, C., Leeb, H., Lindote, A., Lopes, I., Lozano, M., Lukic, S., Milazzo, P. M., Marganiec, J., Marques, L., Moreau, C., Neves, F., Oberhummer, H., Oshima, M., O Brien, S., Pancin, J., Papachristodoulou, C., Rubbia, C., Papadopoulos, C., Paradela, C., Patronis, N., Pavlik, A., Pavlopoulos, P., Perrot, L., Plompen, A., Plukis, A., Poch, A., Pretel, C., Rudolf, G., Quesada, J., Rauscher, T., Reifarth, R., Rullhusen, P., Salgado, J., Sarchiapone, L., Savvidis, I., Stephan, C., Tagliente, G., Tain, J. L., Alvarez-Velarde, F., Tassan-Got, L., Tavora, L., Vannini, G., Vaz, P., Ventura, A., Villamarin, D., Vincente, M. C., Vlachoudis, V., Vlastou, R., Voss, F., Andriamonje, S., Walter, S., Wendler, H., Wiescher, M., and Wisshak, K.

Subjects
Stellar cross sections, Neutron capture, Inelastic scattering, Re/Os cosmo-chronometer, s process
Abstract

The β -decay of 187Re ( t 1 / 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 , γ ) 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. Progress in Particle and Nuclear Physics

Published
2007

5. The 139Lan,gamma cross section: Key for the onset of the s-process

Author

Terlizzi, R., Abbondanno, U., Aerts, G., Alvarez, H., Alvarez-Velarde, H., Alvarez-Velarde, F., Andriamonje, S., Andrzejewski, J., Assimakopoulos, P., Audouin, L., Badurek, G., Baumann, P., Becvar, F., Berthoumieux, E., Calviani, M., Calvino, F., Cano-Ott, D., Capote, R., De Albornoz, A.C., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Couture, A., Cox, J., Dahlfors, M., David, S., Dillmann, I., Dolfini, R., Domingo-Pardo, C., Dridi, W., Duran, I., Eleftheriadis, C., Embid-Segura, M., Ferrant, L., Ferrari, Anthony, Ferreira-Marques, R., Fitzpatrick, L., Frais-Koelbl, H., Fujii, K., Furman, W., Gallino, R., Goncalves, I., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Guerrero, C., Gunsing, F., Haas, B., Haight, R., Heil, M., Herrera-Martinez, A., Igashira, M., Isaev, S., Jericha, E., Kadi, Y., Kappeler, F., Karamanis, D., Karadimos, D., Kerveno, M., Ketlerov, V., Koehler, P., Konovalov, V., Kossionides, E., Krticka, M., Lamboudis, C., Leeb, H., Lindote, A., Lopes, I., Lozano, M., Lukic, S., Marganiec, J., Marques, L., Marrone, S., Massimi, C., Mastinu, P., Mengoni, A., Milazzo, P.M., Moreau, C., Mosconi, M., Neves, F., Oberhummer, H., O'Brien, S., Pancin, J., Papachristodoulou, C., Papadopoulos, C., Paradela, C., Patronis, N., Pavlik, A., Pavlopoulos, P., Perrot, L., Pignatari, M., 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., Savvidis, I., Stephan, C., Tagliente, G., Tain, J.L., Tassan-Got, L., Tavora, L., Vannini, G., Vaz, P., Ventura, A., Villamarin, D., Vincente, M.C., Vlachoudis, V., Vlastou, R., Voss, F., Walter, S., Wendler, H., Wiescher, M., Wisshak, K., Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), nTOF, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
level density, Nuclear Theory, s and r process, FOS: Physical sciences, nucleosynthesis, 25.40.Lw, 26.20.+f, 27.60.+j, 97.10.Cv, Nuclear Experiment (nucl-ex), 139La, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, neutron capture, neutron strength function
Abstract

The nuclear resonance parameters and the capture cross section of the neutron magic isotope 139La has been measured n_TOF. The description of the experimental apparata is followed by the data analysis procedures. We extracted the resonance parameters, the main nuclear quantities such as the resonance integral, the average gamma widths for s- and p-waves, the nuclear level densities and the neutron strength functions. These results represent a signifcant improvement over previous data. The deduced Maxwellian-averaged capture cross sections are important for the interpretation of the most recent spectroscopic observations in low metallicity stars., Comment: 50 pages and 9 Figures

Published
2007

6. The data acquisition system of the neutron time-of-flight facility n- TOF at CERN

Author

Abbondanno, U., Aerts, G., Alvarez-Velarde, F., Alvarez, H., Andriamonje, S., Andrzejewski, J., Badurek, G., Baumann, P., Becvar, F., Benlliure, J., Berthomieux, E., Betev, B., Calvino, P., 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., Eleftheriadis, C., Embid-Segura, M., Ferrant, L., Ferrari, Anthony, 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., Heil, M., Herrera-Martinez, A., Isaev, S., Jericha, E., Käppeler, F., Kadi, Y., Kerveno, M., Ketlerov, V., Koehler, P.E., Konovalov, V., Kossionides, E., Krticka, M., Leeb, H., Lindote, A., Lopes, M.I., Lozano, M., Lukic, S., Marganiec, J., Marrone, S., Martinez-Val, J., Mastinu, P.F., 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, 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., Rulhusen, P., Salgado, J., Schäfer, 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., 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, U.Abbondanno, G. Aert, F.Alvarez, H.Alvarez, S.Andriamonje, J.Andrzejewski, G.Badurek, P.Baumann, F.Becvar, J. Benlliure, E. Berthomieux, B.Betev, F. Calvino, D.Cano-Ott, R.Capote, P.Cennini, V.Chepel, E.Chiaveri, N.Colonna, G.Corte, D.Cortina, A.Couture, J.Cox, S.Dababneh, S.David, R.Dolfini, C.Domingo-Pardo, I.Duran, M.Embid-Segura, L.Ferrant, A.Ferrari, R.Ferreira-Marque, H.Frais-Koelbl, W.Furman, I.Goncalve, E.Gonzalez-Romero, A.Goverdovski, F.Gramegna, E.Griesmayer, F.Gunsing, B.Haa, R.Haight, M.Heil, A.Herrera-Martinez, S.Isaev, E.Jericha, Y.Kadi, F.Kappeler, M.Kerveno, V.Ketlerov, P.E.Koehlera, V.Konovalov, M.Krticka, H.Leeb, A.Lindote, M.I.Lope, M. Lozano, S.Lukic, J.Marganiec, S.Marrone, J.Martinez-Val, P.Mastinu, A.Mengoni, P.M.Milazzo, A.Molina-Coballe, C.Moreau, M.Mosconi, F.Neve, H.Oberhummer, S.O'Brien, J.Pancin, T.Papaevangelou, C.Paradela, A.Pavlik, P.Pavlopoulo, J.M.Perlado, L.Perrot, V.Peskov, R.Plag, A.Plompen, A.Pluki, A. Poch, A.Policarpo, C.Pretel, J.M.Quesada, W. Rapp, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusena, J. Salgado, E. Schaeffer, J.C. Soare, C. Stephan, G. Tagliente, J.L. Tain, L. Tassan-Got, L.M.N. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin-Fernandez, M. Vincente-Vincente, V. Vlachoudi, F. Vo, H. Wendler, M. Wiescher, K. Wisshak., 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), and TOF

Subjects
Nuclear and High Energy Physics, Memory buffer register, TheoryofComputation_COMPUTATIONBYABSTRACTDEVICES, Radiative capture, Computer interfaces, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, ComputingMethodologies_ARTIFICIALINTELLIGENCE, Radiació, Nuclear physics--Experiments, Nuclear magnetic resonance, Data acquisition, Neutron flux, 0103 physical sciences, Pulse shape analysis, Neutron, 010306 general physics, Instrumentation, Physics, Large Hadron Collider, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, business.industry, 25.40.Lw, 25.40.Ny, 29.50.+v, 29.85.+c, Neutron time-of-flight spectroscopy, TheoryofComputation_GENERAL, Dead time, Flash-ADC, Time of flight, Neutron capture, Física nuclear -- Experiments, ComputingMethodologies_PATTERNRECOGNITION, business, Computer hardware
Abstract

The n_TOF facility at CERN has been designed for the measurement of neutron capture, fission and (n; n) crosssections 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 2GHz and 8 Mbyte memory buffer. The software is written in C and Cþþand is running on PCs equipped with RedHat Linux.

Published
2005

7. Measurement of capture cross sections of 90,91,92,94,96Zr isotopes at n_TOF

Author

MOREAU, C., FUJII, K., ABBONDANNO, U., AERTS, G., ÁLVAREZ, H., ALVAREZ-VELARDE, F., ANDRIAMONJE, S., 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., 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., 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., MOSCONI, M., Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, 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
Large Hadron Collider, Isotope, Chemistry, Radiative capture, 020206 networking & telecommunications, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, Resonance (particle physics), Nuclear physics, Neutron capture, 25.40.Lw, 0202 electrical engineering, electronic engineering, information engineering, Nuclear astrophysics, 020201 artificial intelligence & image processing, Neutron, Nuclear Experiment
Abstract

PACS; International audience; The neutron capture cross sections for Zr isotopes have important implications in nuclear technologies as well in the field of nuclear astrophysics. The innovative features of the n_TOF CERN facility allowed for an accurate determination of the capture cross sections for these isotopes. The preliminary results of the measurements show capture-resonance strengths systematically smaller than in previously available data.

Published
2005

8. Independent evidence for M1 scissors resonances built on the levels in the quasicontinuum of 163Dy.

Author

Krticčka, M., Becčvárř, F., Heil, M., Käppeler, F., Reifarth, R., Tomandl, I., Voss, F., and Wisshak, K.

Subjects
NEUTRONS, NEUTRON resonance, RESONANCE, NEUTRON sources, NUCLEAR physics
Abstract

The spectra of γ-rays following the capture of neutrons in 162Dy at neutron energy region of 90–100 keV, where p-wave neutron resonances dominate, were measured for individual γ multiplicities. These data support independently the main assessment from our previous study of the two-step γ cascades, following the thermal s-wave neutron capture in 162Dy, that the M1 scissors-mode resonances are built on all levels of 163Dy, including the levels in the quasicontinuum. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
Full Text
View/download PDF

9. Stellar Neutron Capture Cross Sections of the Lu and Hf Isotopes.

Author

Wisshak, K., Voss, F., Käppeler, F., Kazakov, L., and Krticka, M.

Subjects
*LUTETIUM isotopes, *HAFNIUM isotopes, *NEUTRON capture, *NUCLEOSYNTHESIS, *NUCLEAR reactions, *NUCLEAR physics
Abstract

The neutron capture cross sections of 175,176Lu and 176,177,178,179,180Hf have been measured in the energy range from 3 to 225 keV at the Karlsruhe 3.7 MV Van de Graaff accelerator relative to the gold standard. Neutrons were produced by the 7Li(p,n)7Be reaction and capture events were detected by the Karlsruhe 4πBaF2 detector. The cross section ratios could be determined with uncertainties between 0.9 and 1.8% about a factor of five more accurate than previous data. A strong population of isomeric states was found in neutron capture of the Hf isotopes, which are only partially explained by CASINO/GEANT simulations based on the known level schemes. Maxwellian averaged neutron capture cross sections were calculated for thermal energies between kT = 8 keV and 100 keV. Severe differences up to40% were found to the data of a recent evaluation based on existing experimental results. The new data allow for a much more reliable analysis of the important branching in the s-process synthesis path at 176Lu which can be interpreted as an s-process thermometer. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2005
Full Text
View/download PDF

11. The 1999 update of stellar neutron capture rates.

Author

Bao, Z. Y., Beer, H., Ka¨ppeler, F., Wisshak, K., Voss, F., and Rauscher, T.

Subjects
NEUTRON capture, NUCLEOSYNTHESIS, STELLAR evolution
Abstract

© 2000 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
2000

12. NEUTRON CAPTURE ON RADIOACTIVE TARGETS: PROBING THE S-PROCESS.

Author

WILHELMY, J. B., FOWLER, M. M., HAIGHT, R. C., MILLER, G. G., RUNDBERG, R. S., SEABURY, E. H., ULLMANN, J. L., HEIL, M., KAEPPELER, F., REIFARTH, R., VOSS, F., and WISSHAK, K.

Subjects
NEUTRON capture, NUCLEAR physics, HEAVY elements, NUCLEOSYNTHESIS, NUCLEAR reactions, BETA decay, RADIOACTIVE decay
Published
2000

13. Anomalous neutron radiative capture in 197Au revisited.

Author

Krtička, M., Bečvář, F., Heil, M., Käppeler, F., Reifarth, R., Tomandl, I., Voss, F., and Wisshak, K.

Subjects
GOLD, PHOTONS, NEUTRONS, ATOMS, NUCLEAR reactions, PHYSICS
Abstract

This work is focused on understanding the behavior of the photon strength function of 198Au using a novel approach based on studying γ cascades following the neutron capture in 197Au. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
Full Text
View/download PDF

16. Neutron capture in [sup 155,157,158]Gd and [sup 149]Sm: a search for scissors M1 resonances build on excited states.

Author

Becˇva´rˇ, F., Krticˇka, M., Tomandl, I., Honza´tko, J., Voss, F., Wisshak, K., and Ka¨ppeler, F.

Subjects
GADOLINIUM, SAMARIUM, NEUTRON capture
Abstract

Using the reaction of the slow-neutron capture in [sup 149]Sm and [sup 155,157,158]Gd, the M1 photon strength functions are studied from the point of view of a possible role of scissors resonances built on excited states. © 2000 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
2000

17. Anomalous neutron radiative capture in 197Au revisited.

Author

Krticčka, M., Becčvárř, F., Heil, M., Käppeler, F., Reifarth, R., Tomandl, I., Voss, F., and Wisshak, K.

Subjects
GOLD isotopes, NEUTRONS, RADIATIVE capture, ELECTROMAGNETIC waves, NUCLEAR reactions, NUCLEAR physics
Abstract

Behavior of the photon strength function of 198Au is treated using a novel approach based on studying γ cascades following the thermal and keV neutron capture in 197Au. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
Full Text
View/download PDF

18. Preparation of a 60Fe target for nuclear astrophysics experiments

Author

Schumann, D., Neuhausen, J., Dillmann, I., Domingo Pardo, C., Käppeler, F., Marganiec, J., Voss, F., Walter, S., Heil, M., Reifarth, R., Goerres, J., Uberseder, E., Wiescher, M., and Pignatari, M.

Subjects
*NUCLEAR astrophysics, *NEUTRON capture, *NUCLEAR cross sections, *IRON isotopes, *NUCLEAR energy, *PARTICLE accelerators
Abstract

Abstract: An 60Fe target for studying the 60Fe(n, γ)61Fe cross-section at stellar energies was prepared using radio-chemical separation techniques. In total, 7.8×1015 60Fe atoms (777ng) were separated from a copper beam dump for the 590MeV proton beam of the high intensity accelerator at PSI. The final target was prepared by evaporating the iron-containing aqueous solution onto a graphite backing. With this sample the keV neutron capture cross-section of 60Fe has been measured at FZ Karlsruhe. The work is part of the ERAWAST-initiative (Exotic Radionuclides from Accelerator WAste for Science and Technology) which is aimed at extracting rare valuable radionuclides from accelerator waste by chemical means. [Copyright &y& Elsevier]

Published
2010
Full Text
View/download PDF

19. Study of Photon Strength Function of Actinides: the Case of 235U, 238Np and 241Pu

Author

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

Subjects
Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Work (thermodynamics), Photon, 010308 nuclear & particles physics, General Physics and Astronomy, radiative capture cross section, Actinide, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], NEUTRON INDUCED REACTIONS, Electromagnetisme, 01 natural sciences, Spectral line, Nuclear physics, Neutron capture, Electromagnetism, Excited state, 0103 physical sciences, Photon Strength Function, Atomic physics, 010306 general physics, Absorption (electromagnetic radiation), Nuclear Experiment, Energy (signal processing)
Abstract

The decay from excited levels in medium and heavy nuclei can be described in a statistical approach by means of Photon Strength Functions and Level Density distributions. The study of electromagnetic cascades following neutron capture based on the use of high e ciency detectors has been shown to be well suited for probing the properties of the Photon Strength Function of heavy (high level density) and/or radioactive (high background) nuclei. In this work we have investigated for the rst time the validity of the recommended PSF of actinides, in particular 235U, 238Np and 241Pu. Our study includes the search for resonance structures in the PSF below Sn and draws conclusions regarding their existence and their characteristics in terms of energy, width and electromagnetic nature.

Published
2011

Catalog

Books, media, physical & digital resources
See catalog results