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51 results on '"Kelic, A."'

1. Coulomb dissociation of $^{16}$O into $^{4}$He and $^{12}$C

Author

Markus Reich, Zsolt Fülöp, Ralf Plag, J. Benlliure, D. Cortina-Gil, Marcel Heine, T. Kröll, H. Törnqvist, A. Kelic-Heil, Kafa Khasawneh, B. Thomas, Tanja Heftrich, Joochun Park, O. Kiselev, Håkan T Johansson, Haik Simon, Tahani Almusidi, Olof Tengblad, Christopher Lehr, Ángel Perea, Lukas Ponnath, Thomas Nilsson, H. Alvarez-Pol, Sonja Storck, C. Caesar, Junki Tanaka, Heiko Scheit, Bastian Löher, Z. Slavkovská, M. Volknandt, rey Danilov, Konrad Schmidt, Sonia Escribano Rodriguez, Rene Reifarth, Isabell Deuter, Enrique Casarejos, T. Hensel, Deniz Kurtulgil, Liam Atkins, Anna-Lena Hartig, Lukas Bott, B. Brückner, Armel Kamenyero, Silvia Murillo Morales, Yuri A. Litvinov, S. Fiebiger, Jan Glorius, Matthias Holl, Igor Gašparić, Hendrik Schulte, Romana Popocovski, Enis Lorenz, José L. Sánchez, Stefan Typel, V. Wagner, Viktor Starostin, Stefanos Paschalis, Deniz Savran, David Gonzales Caamaño, Leonard Brandenburg, Daniel Körper, Felix Wamers, Ashton Falduto, Christoph Langer, Björn Jonson, Christian Sürder, María José García Borge, P. Erbacher, László Varga, N. Kurz, Philipp Klenze, Dmytro Kresan, Klaus Volk, Alexander Grein, Marvin Kohls, Kathrin Göbel, Pablo Cabanelas Eiras, Han-Bum Rhee, Roman Gernhäuser, Lorenzo Zanetti, Daniel Bemmerer, Konstanze Boretzky, Enrique Nácher, reas Heinz, D. M. Rossi, Leonid Chulkov, Mario Weigand, Joakim Cederkäll, Michael Heil, Nasser Kalantar-Nayestanaki, Marina Petri, Thomas Aumann, Henning Heggen, 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), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Energy and Sustainability Research Institute Groni, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Technische Universität Darmstadt, Federal Ministry of Education and Research (Germany), and Croatian Science Foundation

Subjects
Paper, History, Scintillator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Dissociation (chemistry), Education, Ion, Nuclear physics, nucleosynthesis, 12C(α, γ)16O, Coulomb dissociation, R3B setup, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, Coulomb, Nuclear fusion, ddc:530, 010306 general physics, Physics, 010308 nuclear & particles physics, Scattering, Charge number, ddc, Computer Science Applications, Nucleon
Abstract

8 pags., 3 figs., We measured the Coulomb dissociation of 16O into 4He and 12C at the R3B setup in a first campaign within FAIR Phase 0 at GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt. The goal was to improve the accuracy of the experimental data for the 12C(α,γ)16O fusion reaction and to reach lower center-ofmass energies than measured so far. The experiment required beam intensities of 109 16O ions per second at an energy of 500 MeV/nucleon. The rare case of Coulomb breakup into 12C and 4He posed another challenge: The magnetic rigidities of the particles are so close because of the same mass-to-charge-number ratio A/Z = 2 for 16O, 12C and 4He. Hence, radical changes of the R3B setup were necessary. All detectors had slits to allow the passage of the unreacted 16O ions, while 4He and 12C would hit the detectors’ active areas depending on the scattering angle and their relative energies. We developed and built detectors based on organic scintillators to track and identify the reaction products with sufficient precision., This project was carried out within FAIR Phase 0 at GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt. This project was supported by the Bundesministerium für Bildung und Forschung (BMBF) (05P19RFFN1, 05P15RFFN1, 05P15RDFN1), HGS-HIRE, HIC for FAIR and the GSI-TU Darmstadt cooperation agreement. I. Gašparić and R. Popočovski have been supported by the Croatian Science Foundation under projects no. 1257 and 7194.

Published
2019
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2. Quasi-free neutron and proton knockout reactions from light nuclei in a wide neutron-to-proton asymmetry range

Author

P. J. Woods, Matthias Heil, K. Boretzky, W. N. Catford, A. Henriques, M. Caamaño, Thomas Nilsson, J. Benlliure, P. Velho, Yasuhiro Togano, F. Wamers, I. Syndikus, E. Cravo, H. Alvarez-Pol, Joachim Enders, N. Kurz, O. Sorlin, Rituparna Kanungo, Deniz Savran, C. Nociforo, Mikhail V. Zhukov, L. M. Fraile, Marine Vandebrouck, Björn Jonson, M. Heine, Haik Simon, Roman Gernhäuser, Olof Tengblad, M. Holl, Z. Elekes, M. A. Najafi, Heiko Scheit, Carlos A. Bertulani, Kai Zuber, J. S. Winfield, T. Le Bleis, D. Cortina-Gil, L. Atar, Enrique Casarejos, Joakim Cederkäll, T. Kröll, C. Caesar, G. L. Wilson, G. Ribeiro, A. Kelic-Heil, Christoph Langer, Nasser Kalantar-Nayestanaki, Helmut Weick, Håkan T Johansson, Pavel Golubev, C. Wheldon, Thomas Aumann, Andreas Martin Heinz, Stefanos Paschalis, P. Díaz Fernández, D. M. Rossi, Enrique Nácher, Simon Lindberg, Catherine Rigollet, S. Beceiro-Novo, J. M. Boillos, L. V. Chulkov, Tanja Heftrich, V. Panin, D. Galaviz Redondo, Jorge Machado, Marina Petri, Rene Reifarth, Iris Dillmann, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), R3B, Federal Ministry of Education and Research (Germany), Technische Universität Darmstadt, Helmholtz International Center for FAIR, European Commission, Ministerio de Ciencia e Innovación (España), Ministerio de Economía, Industria y Competitividad (España), Swedish Research Council, National Science Foundation (US), Department of Energy (US), Fundação para a Ciência e a Tecnologia (Portugal), LIBPhys-UNL, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), and Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Proton, 3313 Tecnología E Ingeniería Mecánicas, media_common.quotation_subject, Nuclear Theory, Aucun, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Asymmetry, Nuclear physics, Momentum, Shell model, 0103 physical sciences, Neutron, ddc:530, 010306 general physics, Nuclear Experiment, Quasi-free scattering, media_common, Physics, Range (particle radiation), 010308 nuclear & particles physics, Scattering, 2207 Física Atómica y Nuclear, lcsh:QC1-999, Inverse kinematics, Isospin, Física nuclear, Spectroscopic factors, Beam (structure), lcsh:Physics
Abstract

7 pags., 4 figs., 2 tabs. -- Open Access funded by Creative Commons Atribution Licence 4.0, The quasi-free scattering reactions C(p,2p) and C(p,pn) have been studied in inverse kinematics at beam energies of 300–400 MeV/u at the RB-LAND setup. The outgoing proton-proton and proton-neutron pairs were detected in coincidence with the reaction fragments in kinematically complete measurements. The efficiency to detect these pairs has been obtained from GEANT4 simulations which were tested using the C(p,2p) and C(p,pn) reactions. Experimental cross sections and momentum distributions have been obtained and compared to DWIA calculations based on eikonal theory. The new results reported here are combined with previously published cross sections for quasi-free scattering from oxygen and nitrogen isotopes and together they enable a systematic study of the reduction of single-particle strength compared to predictions of the shell model over a wide neutron-to-proton asymmetry range. The combined reduction factors show a weak or no dependence on isospin asymmetry, in contrast to the strong dependency reported in nucleon-removal reactions induced by nuclear targets at lower energies. However, the reduction factors for (p,2p) are found to be 'significantly smaller than for (p,pn) reactions for all investigated nuclei., This work was supported by the German Federal Ministry of Education and Research (BMBF projects 05P2015RDFN1 and 05P15WOFNA), through the GSI-TU Darmstadt cooperation agreement, by the State of Hesse through the LOEWE center HIC for FAIR, and the Helmholtz-Gemeinschaft through the graduate school HGS-HIRe. This work was supported by the European Union by means of the European Commission within its Seventh Framework Program (FP7) via ENSAR (Contract No. 262010), and the Spanish CICYT research grants FPA2012-32443, FPA2015-64969-07387, and FPA2015-69640-C2-1-P. This work has supported by the Swedish Research Council under contract number 621-2011-5324. C.A.B. acknowledges support from the U.S. NSF grant No. 1415656 and the U.S. DOE grant No. DE-FG02-08ER41533. Supported by the Portuguese FCT under the project PTDC/FIS/ 103902/2008.

Published
2019
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3. Systematic Investigation of Nucleon Knockout around $^{132}$Sn

Author

J. L. Rodriguez-Sanchez, M. Staniou, L. Pienkowski, J. Díaz-Cortes, V. Föhr, J. Taieb, Enrique Casarejos, D. Cortina-Gil, Thomas Aumann, S. Lukic, Fernando Montes, J. Benlliure, Andreas Martin Heinz, K. Subotic, D. Dragosavac, K. H. Schmidt, A. Kelic-Heil, A. Trzcińska, W. Gawlikowicz, H. Alvarez-Pol, A. Gargano, Kerttuli Helariutta, B. Blank, M. Gascón, Carlos A. Bertulani, D. Pérez-Loureiro, K. Sümmerer, 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), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Department of Physics, Tracers in Molecular Imaging (TRIM), Department of Chemistry, 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
Nuclear physics, Physics, 010308 nuclear & particles physics, 0103 physical sciences, education, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 010306 general physics, Nucleon, Nuclear Experiment, 01 natural sciences, 114 Physical sciences
Abstract

International audience; Neutron- and proton-removal cross sections for nuclei around ^132Sn have been systematically measured. The measurements clearly show the effect of the N = 82 closed shells. Model calculations describing all processes leading to single nucleon removal residual nuclei provide a reasonable description of the neutron removal process but clearly overestimate the proton removal ones. This overestimation of the proton removal channels could be explained as due to the presence of short-range correlated neutron-proton pairs in nuclei.

Published
2018
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4. Production of Strange Particles and Hypernuclei in Spallation and Fragmentation Reactions

Author

C. Scheidenberger, J. Hirtz, T. Saito, A. Kelic-Heil, J. L. Rodriguez-Sanchez, Y. K. Tanaka, J.-C. David, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, and Super-FRS

Subjects
010308 nuclear & particles physics, Chemistry, Nuclear Theory, fragment separator Super-FRS, strange particle: production, inverse kinematics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, evaporation, Nuclear physics, hypernucleus: production, Fragmentation (mass spectrometry), nucleus: heavy, kinematics, fragmentation, 0103 physical sciences, Hypernuclei, fission, Spallation, 010306 general physics, Nuclear Experiment, intranuclear cascade
Abstract

International audience; Hypernuclear physics is a longstanding field of research in which innovative experiments using the inverse kinematics technique to accelerate light, medium, and heavy nuclei at relativistic energies have become an important tool to study the properties of hypernuclei. We investigate the hypernuclei production in spallation reactions where multi-fragmentation, evaporation, and fission processes play an important role in the formation of final hypernuclei residues. For the description of spallation reactions, we couple the Liège intranuclear-cascade model, extended recently to strange particles, to a new version of the de-excitation model ABLA07 that accounts for the evaporation of \(\Lambda \) particles from hot hyperremnants produced during the intranuclear cascade stage. These state-of-the-art models are used to study the production of hypernuclei close to the limits of the chart of nuclei.

Published
2018
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5. What Shall we do with the Spectator System in Ultrarelativistic Heavy-ion Collisions?

Author

Iwona Anna Sputowska, C. Schmitt, P. N. Nadtochy, Andrzej Rybicki, Vitalii Ozvenchuk, Antoni Szczurek, A. Kelic, K. Mazurek, A. Marcinek, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, heavy ion: scattering, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], 010308 nuclear & particles physics, Nuclear Theory, General Physics and Astronomy, CERN SPS, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], spectator, 01 natural sciences, Nuclear physics, electromagnetic, fragmentation, 0103 physical sciences, Heavy ion, Nuclear Experiment
Abstract

International audience; This paper briefly reviews the first results of a coordinated study aimed at the clarification of the interplay between spectator fragmentation and electromagnetic phenomena in ultrarelativistic heavy-ion collisions at CERN SPS energies. The available experimental and phenomenological results are put in the context of recent theoretical calculations.

Published
2018
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6. Quasifree ($p,pN$) scattering of light neutron-rich nuclei near $N=14$

Author

Díaz Fernández, P., Alvarez-Pol, H., Crespo, R., Cravo, E., Atar, L., Deltuva, A., Aumann, T., Avdeichikov, V., Beceiro-Novo, S., Bemmerer, D., Benlliure, J., Bertulani, C.A., Boillos, J.M., Boretzky, K., Borge, M.J.G., Caamaño, M., Cabanelas, P., Caesar, C., Casarejos, E., Catford, W., Cederkäll, J., Chartier, M., Chulkov, L.V., Cortina-Gil, D., Datta Pramanik, U., Dillmann, I., Elekes, Z., Enders, J., Ershova, O., Estradé, A., Farinon, F., Fernández-Domínguez, B., Fraile, L.M., Freer, M., Galaviz, D., Geissel, H., Gernhäuser, R., Golubev, P., Göbel, K., Hagdahl, J., Heftrich, T., Heil, M., Heine, M., Heinz, A., Henriques, A., Holl, M., Hufnagel, A., Ignatov, A., Johansson, H.T., Jonson, B., Jurčiukonis, D., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Knyazev, A., Kröll, T., Kurz, N., Labiche, M., Langer, C., Le Bleis, T., Lemmon, R., Lindberg, S., Machado, J., Marganiec, J., Moro, A.M., Movsesyan, A., Nacher, E., Najafi, A., Nikolskii, E., Nilsson, T., Nociforo, C., Panin, V., Paschalis, S., Perea, A., Petri, M., Pietras, B., Pietri, S., Plag, R., Reifarth, R., Ribeiro, G., Rigollet, C., Rossi, D., Röder, M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Syndikus, I., Taylor, J.T., Tengblad, O., Thies, R., Togano, Y., Vandebrouck, M., Velho, P., Volkov, V., Wagner, A., Wamers, F., Weick, H., Wheldon, C., Wilson, G., Winfield, J.S., Woods, P., Yakorev, D., Zhukov, M., Zilges, A., Zuber, K., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; Background: For many years, quasifree scattering reactions in direct kinematics have been extensively used to study the structure of stable nuclei, demonstrating the potential of this approach. The RB3 collaboration has performed a pilot experiment to study quasifree scattering reactions in inverse kinematics for a stable C12 beam. The results from that experiment constitute the first quasifree scattering results in inverse and complete kinematics. This technique has lately been extended to exotic beams to investigate the evolution of shell structure, which has attracted much interest due to changes in shell structure if the number of protons or neutrons is varied. Purpose: In this work we investigate for the first time the quasifree scattering reactions (p,pn) and (p,2p) simultaneously for the same projectile in inverse and complete kinematics for radioactive beams with the aim to study the evolution of single-particle properties from N=14 to N=15. Method: The structure of the projectiles O23, O22, and N21 has been studied simultaneously via (p,pn) and (p,2p) quasifree knockout reactions in complete inverse kinematics, allowing the investigation of proton and neutron structure at the same time. The experimental data were collected at the R3B-LAND setup at GSI at beam energies of around 400 MeV/u. Two key observables have been studied to shed light on the structure of those nuclei: the inclusive cross sections and the corresponding momentum distributions. Conclusions: The knockout reactions (p,pn) and (p,2p) with radioactive beams in inverse kinematics have provided important and complementary information for the study of shell evolution and structure. For the (p,pn) channels, indications of a change in the structure of these nuclei moving from N=14 to N=15 have been observed, i.e., from the 0d5/2 shell to the 1s1/2. This supports previous observations of a subshell closure at N=14 for neutron-rich oxygen isotopes and its weakening for the nitrogen isotopes.

Published
2018
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7. Structure of $^{13}$Be studied in proton knockout from $^{14}$B

Author

Ribeiro, G., Nácher, E., Tengblad, O., Díaz Fernández, P., Aksyutina, Y., Alvarez-Pol, H., Atar, L., Aumann, T., Avdeichikov, V., Beceiro-Novo, S., Bemmerer, D., Benlliure, J., Bertulani, C. A., Boillos, J. M., Boretzky, K., Borge, M. J. G., Caamano, M., Caesar, C., Casarejos, E., Catford, W., Cederkäll, J., Chartier, M., Chulkov, L., Cortina-Gil, D., Cravo, E., Crespo, R., Datta Pramanik, U., Dillmann, I., Elekes, Z., Enders, J., Ershova, O., Estrade, A., Farinon, F., Fraile, L. M., Freer, M., Fynbo, H. O. U., Galaviz, D., Geissel, H., Gernhäuser, R., Golubev, P., Göbel, K., Hagdahl, J., Heftrich, T., Heil, M., Heine, M., Heinz, A., Henriques, A., Holl, M., Hufnagel, A., Ignatov, A., Johansson, H. T., Jonson, B., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Kurz, N., Kröll, T., Labiche, M., Langer, C., Le Bleis, T., Lemmon, R., Lindberg, S., Machado, J., Marganiec, J., Movsesyan, A., Nilsson, T., Nociforo, C., Panin, V., Paschalis, S., Perea, A., Petri, M., Pietri, S., Plag, R., Reifarth, R., Rigollet, C., Riisager, K., Rossi, D., Röder, M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Syndikus, I., Taylor, J. T., Thies, R., Velho, P., Wagner, A., Wamers, F., Vandebrouck, M., Weick, H., Wheldon, C., Wilson, G., Wimmer, C., Winfield, J. S., Woods, P., Zhukov, M. V., Zilges, A., Zuber, K., Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), R$^3$B, and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
radioactive beams, nuclear structure, Nuclear Theory, Aucun, 13Be, Nuclear Reactions, unbound nuclei, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

Physical review / C 98(2), 024603 (2018). doi:10.1103/PhysRevC.98.024603, Published by Inst., Woodbury, NY

Published
2018
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8. Quasifree ($p$, $2p$) Reactions on Oxygen Isotopes: Observation of Isospin Independence of the Reduced Single-Particle Strength

Author

Atar, Leyla, Paschalis, Stefanos, Barbieri, C., Bertulani, C. A., Fernández, P. Díaz, Holl, M., Najafi, M.A, Panin, V., Alvarez-Pol, H., Aumann, T., Avdeichikov, V., Beceiro-Novo, S., Bemmerer, D., Benlliure, J., Boillos, J.M., Boretzky, K., Borge, M. J. G., Caamaño, M., Caesar, C., Casarejos, E., Catford, W., Cederkäll, J., Chartier, M., Chulkov, L., Cortina-Gil, D., Cravo, E., Crespo, R., Dillmann, I., Elekes, Z., Enders, J., Ershova, O., Estrade, A., Farinon, F., Fraile, L.M, Freer, M., Redondo, D. Galaviz, Geissel, H., Gernhäuser, R., Golubev, P., Göbel, K., Hagdahl, J., Heftrich, T., Heil, M., Heine, M., Heinz, A., Henriques, A., Hufnagel, A., Ignatov, A., Johansson, H.T, Jonson, B, Kahlbow, J., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Knyazev, A., Kröll, T., Kurz, N., Labiche, M., Langer, C., Le Bleis, T., Lemmon, R., Lindberg, S., Machado, J., Marganiec-Gałązka, J., Movsesyan, A., Nacher, E., Nikolskii, E.Y., Nilsson, T., Nociforo, C., Perea, A., Petri, Marina, Pietri, S., Plag, R., Reifarth, R., Ribeiro, G., Rigollet, C., Rossi, D.M., Röder, M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Syndikus, I., Taylor, J. T., Tengblad, O, Thies, R., Togano, Y., Vandebrouck, M., Velho, P., Volkov, V., Wagner, A., Wamers, F., Weick, H., Wheldon, C., Wilson, G.L., Winfield, J.S., Woods, P., Yakorev, D., Zhukov, M., Zilges, A., Zuber, K, Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Helmholtz Centre for Heavy Ion Research, Department of Energy (US), National Science Foundation (US), Ministerio de Economía y Competitividad (España), Science and Technology Facilities Council (UK), Federal Ministry of Education and Research (Germany), University of Leicester, and Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Nuclear Theory, ddc:550, Aucun, Nuclear Experiment
Abstract

7 pags., 4 figs., tab., Quasifree one-proton knockout reactions have been employed in inverse kinematics for a systematic study of the structure of stable and exotic oxygen isotopes at the (RB)-B-3/LAND setup with incident beam energies in the range of 300-450 MeV/u. The oxygen isotopic chain offers a large variation of separation energies that allows for a quantitative understanding of single-particle strength with changing isospin asymmetry. Quasifree knockout reactions provide a complementary approach to intermediate-energy one-nucleon removal reactions. Inclusive cross sections for quasifree knockout reactions of the type O-A(p,2p)NA-1 have been determined and compared to calculations based on the eikonal reaction theory. The reduction factors for the single-particle strength with respect to the independent-particle model were obtained and compared to state-of-the-art ab initio predictions. The results do not show any significant dependence on proton-neutron asymmetry., This work was supported by the German Federal Ministry for Education and Research (BMBF project 05P15RDFN1), and through the GSI-TU Darmstadt cooperation agreement. The work of C. B., W. C., and G.W. was supported by the United Kingdom Science and Technology Facilities Council (STFC) under Grants No. ST/L005743/1 and No. ST/P005314/1. SCGF calculations were performed at the DiRAC Complexity system of the University of Leicester (BIS National E-1023 infrastructure capital Grant No. ST/K000373/1 and STFC 1024 Grant No. ST/K0003259/1). C. A. B. acknowledges support by the U.S. DOE Grant No. DE-FG02- 08ER41533 and the U.S. NSF Grant No. 1415656. L. M. F. acknowledges funding from MINECO FPA2015-65035-P project.

Published
2018
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9. Effective proton-neutron interaction near the drip line from unbound states in $^{25,26}$F

Author

Vandebrouck, M., Lepailleur, A., Sorlin, O., Aumann, T., Caesar, C., Holl, M., Panin, V., Wamers, F., Stroberg, S. R., Holt, J. D., de Oliveira Santos, F., Alvarez-Pol, H., Atar, L., Avdeichikov, V., Beceiro-Novo, S., Bemmerer, D., Benlliure, J., Bertulani, C. A., Bogner, S. K., Boillos, J. M., Boretzky, K., Borge, M. J. G., Caamaño, M., Casarejos, E., Catford, W., Cederkäll, J., Chartier, M., Chulkov, L., Cortina-Gil, D., Cravo, E., Crespo, R., Datta Pramanik, U., Díaz Fernández, P., Dillmann, I., Elekes, Z., Enders, J., Ershova, O., Estradé, A., Farinon, F., Fraile, L. M., Freer, M., Galaviz, D., Geissel, H., Gernhäuser, R., Gibelin, J., Golubev, P., Göbel, K., Hagdahl, J., Heftrich, T., Heil, M., Heine, M. (Marcel), Heinz, A., Henriques, A., Hergert, H., Hufnagel, A., Ignatov, A., Johansson, H. T., Jonson, B., Kahlbow, J., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Knyazev, A., Kröll, T., Kurz, N., Labiche, M., Langer, C., Le Bleis, T., Lemmon, R., Lindberg, S., Machado, J., Marganiec, J., Marqués, F. M., Movsesyan, A., Nacher, E., Najafi, M., Nikolskii, E., Nilsson, T., Nociforo, C., Paschalis, S., Perea, A., Petri, M., Pietri, S., Plag, R., Reifarth, R., Ribeiro, G., Rigollet, C., Röder, M., Rossi, D., Savran, D., Scheit, H., Schwenk, A., Simon, H., Syndikus, I., Taylor, J. T., Tengblad, O., Thies, R., Togano, Y., Velho, P., Volkov, V., Wagner, A., Weick, H., Wheldon, C., Wilson, G., Winfield, J. S., Woods, P., Yakorev, D., Zhukov, M., Zilges, A., Zuber, K., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), R3B Collaboration, Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
21.10.-k, Nuclear Theory, Aucun, Coulomb dissociation radioactive beam, FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, 27.30.+t, 25.60.-t, 29.30.Hs
Abstract

Background: Odd-odd nuclei, around doubly closed shells, have been extensively used to study proton-neutron interactions. However, the evolution of these interactions as a function of the binding energy, ultimately when nuclei become unbound, is poorly known. The $^{26}$F nucleus, composed of a deeply bound $\pi0d\_{5/2}$ proton and an unbound $\nu0d\_{3/2}$ neutron on top of an $^{24}$O core, is particularly adapted for this purpose. The coupling of this proton and neutron results in a $J^{\pi} = 1^{+}\_1 - 4^{+}\_1$ multiplet, whose energies must be determined to study the influence of the proximity of the continuum on the corresponding proton-neutron interaction. The $J^{\pi} = 1^{+}\_1, 2^{+}\_1,4^{+}\_1$ bound states have been determined, and only a clear identification of the $J^{\pi} =3^{+}\_1$ is missing.Purpose: We wish to complete the study of the $J^{\pi} = 1^{+}\_1 - 4^{+}\_1$ multiplet in $^{26}$F, by studying the energy and width of the $J^{\pi} =3^{+}\_1$ unbound state. The method was firstly validated by the study of unbound states in $^{25}$F, for which resonances were already observed in a previous experiment.Method: Radioactive beams of $^{26}$Ne and $^{27}$Ne, produced at about $440A$\,MeV by the FRagment Separator at the GSI facility, were used to populate unbound states in $^{25}$F and $^{26}$F via one-proton knockout reactions on a CH$\_2$ target, located at the object focal point of the R$^3$B/LAND setup. The detection of emitted $\gamma$-rays and neutrons, added to the reconstruction of the momentum vector of the $A-1$ nuclei, allowed the determination of the energy of three unbound states in $^{25}$F and two in $^{26}$F. Results: Based on its width and decay properties, the first unbound state in $^{25}$F is proposed to be a $J^{\pi} = 1/2^-$ arising from a $p\_{1/2}$ proton-hole state. In $^{26}$F, the first resonance at 323(33)~keV is proposed to be the $J^{\pi} =3^{+}\_1$ member of the $J^{\pi} = 1^{+}\_1 - 4^{+}\_1$ multiplet. Energies of observed states in $^{25,26}$F have been compared to calculations using the independent-particle shell model, a phenomenological shell-model, and the ab initio valence-space in-medium similarity renormalization group method.Conclusions: The deduced effective proton-neutron interaction is weakened by about 30-40\% in comparison to the models, pointing to the need of implementing the role of the continuum in theoretical descriptions, or to a wrong determination of the atomic mass of $^{26}$F., Comment: 14 pages, 7 figures, 3 tables, submitted to PRC

Published
2017
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10. High-precision measurement of isotopic fission yields of $^{236}$U

Author

S. Pietri, B. Jurado, Herbert A. Simon, M. Caamaño, B. Löher, L. Grente, C. Paradela, F. Farget, A. Chatillon, L. Audouin, Simon Lindberg, G. Boutoux, B. Laurent, G. Belier, Enrique Casarejos, H. Alvarez-Pol, K.-H. Schmidt, C. Rodriguez-Tajes, N. Kurz, J. L. Rodriguez-Sanchez, J. F. Martin, D. Ramos, Andreas Martin Heinz, L. Tassan-Got, D. M. Rossi, J. Benlliure, Bernd Voss, C. Nociforo, H. Törnqvist, A. Kelic-Heil, Y. Yan, D. Cortina-Gil, Helmut Weick, Håkan T Johansson, Y. Ayyad, T. Gorbinet, B. Fernández-Domínguez, J. Taieb, 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), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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), 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), 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), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Physics, Inverse kinematics, Spectrometer, 010308 nuclear & particles physics, Fission, QC1-999, Nuclear data, Charge (physics), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Recoil, 0103 physical sciences, 010306 general physics, Spectroscopy, Nuclear Experiment, Beam (structure)
Abstract

We report on the second SOFIA experiment, dedicated to the fission yields of 236U*, analog to 235U(n,f). The measurement is based on the inverse kinematics method, using a relativistic, secondary beam of 236U. Both fission fragments are identified in mass and charge in the SOFIA recoil spectrometer. The obtained isotopic yields are compared with existing spectroscopy measurements and the elemental yields are used to discuss the treatment of the even-odd effect with energy in nuclear data libraries.

Published
2017
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11. Determination of the Neutron-Capture Rate of $^{17}$C for the R-process Nucleosynthesis

Author

Heine, M., Typel, S., Wu, M. -R, Adachi, T., Aksyutina, Y., Alcantara, J., Altstadt, S., Alvarez-Pol, H., Ashwood, N., Aumann, T., Avdeichikov, V., Barr, M., Beceiro-Novo, S., Daniel Bemmerer, Benlliure, J., Bertulani, C. A., Boretzky, K., Borge, M. J. G., Burgunder, G., Caamano, M., Caesar, C., Casarejos, E., Catford, W., Cederkäll, J., Chakraborty, S., Chartier, M., Chulkov, L. V., Cortina-Gil, D., Crespo, R., Datta Pramanik, U., Diaz Fernandez, P., Dillmann, I., Elekes, Z., Enders, J., Ershova, O., Estrade, A., Farinon, F., Fraile, L. M., Freer, M., Freudenberger, M., Fynbo, H. O. U., Galaviz, D., Geissel, H., Gernhäuser, R., Göbel, K., Golubev, P., Gonzalez Diaz, D., Hagdahl, J., Heftrich, T., Heil, M., Heinz, A., Henriques, A., Holl, M., Ickert, G., Ignatov, A., Jakobsson, B., Johansson, H. T., Jonson, B., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Knöbel, R., Kröll, T., Krücken, R., Kurcewicz, J., Kurz, N., Labiche, M., Langer, C., Le Bleis, T., Lemmon, R., Lepyoshkina, O., Lindberg, S., Machado, J., Marganiec, J., Martínez-Pinedo, G., Maroussov, V., Mostazo, M., Movsesyan, A., Najafi, A., Neff, T., Nilsson, T., Nociforo, C., Panin, V., Paschalis, S., Perea, A., Petri, M., Pietri, S., Plag, R., Prochazka, A., Rahaman, A., Rastrepina, G., Reifarth, R., Ribeiro, G., Ricciardi, M. V., Rigollet, C., Riisager, K., Röder, M., Rossi, D., Sanchez Del Rio, J., Savran, D., Scheit, H., Simon, H., Sorlin, O., Stoica, V., Streicher, B., Taylor, J. T., Tengblad, O., Terashima, S., Thies, R., Togano, Y., Uberseder, E., Walle, J., Velho, P., Volkov, V., Wagner, A., Wamers, F., Weick, H., Weigand, M., Wheldon, C., Wilson, G., Wimmer, C., Winfield, J. S., Woods, P., Yakorev, D., Zhukov, M. V., Zilges, A., Zuber, K., Helmholtz zentrum für Schwerionenforschung GmbH (GSI), KVI-CART, University of Groningen, University of Groningen [Groningen], Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), R3B Collaboration, Research unit Nuclear & Hadron Physics, and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
astro-ph.SR, Astrophysics - Solar and Stellar Astrophysics, FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nucl-ex, Nuclear Experiment, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

International audience; With the R$^{3}$B-LAND setup at GSI we have measured exclusive relative-energy spectra of the Coulomb dissociation of $^{18}$C at a projectile energy around 425~AMeV on a lead target, which are needed to determine the radiative neutron-capture cross sections of $^{17}$C into the ground state of $^{18}$C. Those data have been used to constrain theoretical calculations for transitions populating excited states in $^{18}$C. This allowed to derive the astrophysical cross section $\sigma^{*}_{\mathrm{n}\gamma}$ accounting for the thermal population of $^{17}$C target states in astrophysical scenarios. The experimentally verified capture rate is significantly lower than those of previously obtained Hauser-Feshbach estimations at temperatures $T_{9}\leq{}1$~GK. Network simulations with updated neutron-capture rates and hydrodynamics according to the neutrino-driven wind model as well as the neutron-star merger scenario reveal no pronounced influence of neutron capture of $^{17}$C on the production of second- and third-peak elements in contrast to earlier sensitivity studies.

Published
2017
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12. Studies on Fission with Aladin

Author

A. Chatillon, Andreas Martin Heinz, Helmut Weick, C. Paradela, Nikolaus Kurz, S. Pietri, DC Gil, G. Boutoux, Bernd Voss, M. Caamaño, Enrique Casajeros, Karl-Heinz Schmidt, Laurent Tassan-Got, J. Benlliure, B. Laurent, L. Grente, G. Belier, Beatriz Jurado, D. Rossi, A. Ebran, Yassid Ayyad, J. F. Martin, T. Gorbinet, Jose-Luis Rodriguez Sanchez, L. Audouin, C. Nociforo, Hector Alvarez Pol, E. Pellereau, J. Taieb, Beatriz Fernandez Dominguez, A. Kelic-Heil, Haik Simon, F. Farget, D. Ramos, J. Vargas, Carme Rodriguez Tajes, Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), 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), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université 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), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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
Nuclear physics, Physics, Fission, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; Note from publisher: This article contains the abstract only.

Published
2016
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13. Dissipative effects in fission investigated in complete kinematics measurements

Author

Enrique Casarejos, A. Chatillon, B. Laurent, G. Boutoux, A. Kelic-Heil, B. Pietras, Andreas Martin Heinz, J. L. Rodriguez-Sanchez, G. Belier, J. Benlliure, C. Rodriguez-Tajes, Yassid Ayyad, Herbert A. Simon, D. M. Rossi, C. Paradela, L. Audouin, E. Pellereau, J. Vargas, D. Cortina-Gil, Bernd Voss, T. Gorbinet, H. Alvarez-Pol, D. Ramos, J. F. Martin, J. Taieb, Universidade de Santiago de Compostela [Spain] (USC ), USC, Universidad de Santiago de Compostela, Universidad Santiago de Compostela, Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), 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'Études de Limeil-Valenton (CEA-DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), A. Plompen, F.-J. Hambsch, P. Schillebeeckx, W. Mondelaers, J. Heyse, S. Kopecky, P. Siegler and S. Oberstedt, and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Mass number, Physics, Angular momentum, Mass distribution, 010308 nuclear & particles physics, Fission, QC1-999, Nuclear Theory, Dissipation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, Dissipative system, Physics::Atomic and Molecular Clusters, Spallation, Neutron, 010306 general physics, Nuclear Experiment
Abstract

International audience; The study of dissipative effects in fission has been carried out with fusion-fission reactions by using a limited number of observables, such as the fission probabilities, the mass distribution of the fission fragments, or the neutron multiplicities. However, the large angular momenta gained by the compound nucleus in this kind of reaction could affect the conclusions drawn from such experiments. In this work, we propose to investigate the fission dynamics by the use of spallation reactions on 208Pb because the fissioning systems are produced with low angular momentum, small deformations, and high excitation energies, enhancing the dissipative effects. The complete kinematics measurements of the fission fragments and light-charged particles were performed by the use of the SOFIA setup combined with the inverse kinematics technique, allowing us for the first time a full indentification in atomic and mass number of the two fission fragments. These measurements permit us to define new fission observables for the investigation of the temperature and deformation dependencies of the dissipation parameter.

Published
2016
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14. Coulomb dissociation of $^{20,21}$N

Author

A. Estrade, G. Burgunder, Andreas Martin Heinz, Andreas Wagner, Enrique Casarejos, Roy Crawford Lemmon, C. Wimmer, Ethan Uberseder, M. Heine, T. Le Bleis, N. Kurz, H. O. U. Fynbo, Olof Tengblad, D. Cortina-Gil, V. Stoica, F. Farinon, L. Atar, D. Yakorev, Joachim Enders, Helmut Weick, Z. Elekes, Carlos A. Bertulani, J. Sanchez del Rio Saez, Håkan T Johansson, Daniel Bemmerer, M. Freudenberger, D. Galaviz, Mikhail V. Zhukov, Heiko Scheit, Herbert A. Simon, A. Ignatov, P. Diaz-Fernandez, Nasser Kalantar-Nayestanaki, C. Wheldon, Thomas Aumann, P. Velho, J. Van de Walle, K. Riisager, Pavel Golubev, U. Datta Pramanik, J. Taylor, J. Marganiec, G. L. Wilson, Ralf Plag, J. Benlliure, O. Lepyoshkina, Marielle Chartier, N. I. Ashwood, A. Movsesyan, M. Röder, Andreas Zilges, Yasuhiro Togano, P. J. Woods, Ronja Thies, S. Pietri, R. Kanungo, Kai Zuber, Najafi, M. Labiche, M. J. G. Borge, Thomas Nilsson, A. Prochazka, G. Ribeiro, Christoph Langer, Ángel Perea, Roman Gernhäuser, G. Ickert, T. Adachi, R. Crespo, K. Boretzky, J. S. Winfield, W. N. Catford, G. Rastrepina, H. Alvarez-Pol, Bo Jakobsson, M. Barr, L. M. Fraile, C. Nociforo, F. Wamers, Rahaman, M. V. Ricciardi, M. Mostazo Caro, Björn Jonson, T. Kröll, Y. Aksyutina, Vladimir Avdeichikov, R. Knöbel, Matthias Heil, C. Caesar, B. Streicher, Joakim Cederkäll, J. Hagdahl, J. Kurcewicz, Deniz Savran, M. Caamaño, V. Volkov, Satoru Terashima, M. Holl, O. Ershova, Kathrin Göbel, A. Henriques, Martin Freer, J. Alcantara, Jorge Machado, Marina Petri, D. M. Rossi, Tanja Heftrich, S. Chakraborty, Mario Weigand, Simon Lindberg, R. Krücken, D. Gonzalez Diaz, Catherine Rigollet, Hans Geissel, Rene Reifarth, O. Sorlin, L. V. Chulkov, I. Dillmann, Stefanos Paschalis, V. Panin, S. Altstadt, S. Beceiro, A. Kelic-Heil, Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Light nucleus, 010308 nuclear & particles physics, Thermonuclear reaction, Aucun, FOS: Physical sciences, chemistry.chemical_element, Detailed balance, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Dissociation (chemistry), Ion, chemistry, 0103 physical sciences, Coulomb, Fluorine, Nuclear Experiment (nucl-ex), Atomic physics, 010306 general physics, Nuclear Experiment, Excitation
Abstract

International audience; Neutron-rich light nuclei and their reactions play an important role for the creation of chemical elements. Here, data from a Coulomb dissociation experiment on $^{20,21}$N are reported. Relativistic $^{20,21}$N ions impinged on a lead target and the Coulomb dissociation cross section was determined in a kinematically complete experiment. Using the detailed balance theorem, the $^{19}\mathrm{N}(\mathrm{n},\gamma)^{20}\mathrm{N}$ and $^{20}\mathrm{N}(\mathrm{n},\gamma)^{21}\mathrm{N}$ excitation functions and thermonuclear reaction rates have been determined. The $^{19}\mathrm{N}(\mathrm{n},\gamma)^{20}\mathrm{N}$ rate is up to a factor of 5 higher at $T

Published
2016
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15. Fission dynamics at high excitation energies investigated in complete kinematics measurements

Author

J. Benlliure, Yassid Ayyad, Enrique Casarejos, E. Pellereau, H. Alvarez-Pol, J. F. Martin, B. Pietras, A. Chatillon, G. Belier, C. Paradela, G. Boutoux, B. Laurent, L. Audouin, Andreas Martin Heinz, J. Vargas, D. Cortina-Gil, T. Gorbinet, A. Kelic-Heil, C. Rodriguez-Tajes, J. L. Rodriguez-Sanchez, J. Taieb, Herbert A. Simon, D. Ramos, Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), 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), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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 Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, History, Inverse kinematics, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], 010308 nuclear & particles physics, Fission, Nuclear Theory, Observable, Kinematics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Kinetic energy, 7. Clean energy, 01 natural sciences, Coincidence, Computer Science Applications, Education, Nuclear physics, 0103 physical sciences, Dissipative system, Atomic physics, 010306 general physics, Nuclear Experiment, Excitation
Abstract

International audience; Light-charged particles emitted in proton-induced fission reactions on (208)Pb have been measured at different kinetic energies: 370A, 500A, and 650A MeV. The experiment was performed by the SOFIA collaboration at the GSI facilities in Darmstadt (Germany). The inverse kinematics technique was combined with a setup especially designed to measure light-charged particles in coincidence with fission fragments. The data were compared with different model calculations to assess the ground-to-saddle dynamics. The results confirm that transient and dissipative effects are required for an accurate description of the fission observables.

Published
2016
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16. Studies on fission with ALADIN - Precise and simultaneous measurement of fission yields, total kinetic energy and total promptneutron multiplicity at GSI

Author

Helmut Weick, Andreas Martin Heinz, Haik Simon, Laurent Tassan-Got, J. F. Martin, C. Nociforo, C. Rodriguez-Tajes, A. Kelic-Heil, D. Rossi, A. Chatillon, G. Boutoux, Beatriz Fernandez Dominguez, L. Audouin, J. Benlliure, S. Pietri, L. Grente, C. Paradela, Thomas Aumann, B. Laurent, M. Caamaño, DC Gil, Yassid Ayyad, Bernd Voss, N. Kurz, E. Pellereau, F. Farget, T. Gorbinet, D. Ramos, H. Alvarez-Pol, A. Ebran, J. Taieb, Beatriz Jurado, G. Belier, J. Vargas, Karl-Heinz Schmidt, Jose-Luis Rodríguez-Sànchez, Enrique Casarejos, DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Universidade de Santiago de Compostela [Spain] (USC ), 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), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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
Nuclear reaction, Physics, Nuclear and High Energy Physics, Fission, Nuclear Theory, Fission product yield, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, Nuclear physics, Prompt neutron, Nuclear fission, Valley of stability, Nuclear fusion, Neutron, Nuclear Experiment
Abstract

Topical Collection : Perspectives on Nuclear Data for the Next Decade; International audience; A novel technique for fission studies, based on the inverse kinematics approach, is presented. Following pioneering work in the nineties, the SOFIA Collaboration has designed and built an experimental set-up dedicated to the simultaneous measurement of isotopic yields, total kinetic energies and total prompt neutron multiplicities, by fully identifying both fission fragments in coincidence, for the very first time. This experiment, performed at GSI, permits to study the fission of a wide variety of fissioning systems, ranging from mercury to neptunium, possibly far from the valley of stability. A first experiment, performed in 2012, has provided a large array of unprecedented data regarding the nuclear fission process. An excerpt of the results is presented. With this solid starter, further improvements of the experimental set-up are considered, which are consistent with the expected developments at the GSI facility, in order to measure more fission observables in coincidence. The completeness reached in the SOFIA data, permits to scrutinize the correlations between the interesting features of fission, offering a very detailed insight in this still unraveled mechanism.

Published
2015
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17. New experimental approaches to investigate the fission dynamics

Author

J. Taieb, D. Ramos, Herbert A. Simon, B. Pietras, J. Benlliure, B. Laurent, Y. Ayyad, J. Vargas, D. Cortina-Gil, H. Alvarez-Pol, T. Gorbinet, A. Chatillon, Andreas Martin Heinz, G. Boutoux, A. Kelic-Heil, J. F. Martin, E. Casarejos, D. M. Rossi, E. Pellereau, Bernd Voss, C. Rodriguez-Tajes, G. Belier, J. L. Rodriguez-Sanchez, C. Paradela, L. Audouin, 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), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), F. Cristancho, and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Mass number, Angular momentum, Work (thermodynamics), Mass distribution, 010308 nuclear & particles physics, Fission, Nuclear Theory, Charge density, Observable, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Lead, 0103 physical sciences, Fission reactions, Dissipative system, Physics::Atomic and Molecular Clusters, Angular momemtum, Atomic physics, 010306 general physics, Nuclear Experiment
Abstract

International audience; The first ever achieved full identification of both fission fragments, in atomic and mass number, made it possible to define new observables sensitive to the fission dynamics along the fission path up to the scission point. Moreover, proton-induced fission of 208 Pb at high energies offers optimal conditions for the investigation of dissipative, and transient effects, because of the high-excitation energy of the fissioning nuclei, its low angular momentum, and limited shape distortion by the reaction. In this work we show that the charge distribution of the final fission fragments can constrain the ground-to-saddle dynamics while the mass distribution is sensitive to the dynamics until the scission point.

Published
2015
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18. Accurate measurements of fission-fragment yields in $^{234,235,236,238}$U(γ,f) with the SOFIA set-up

Author

Enrique Casarejos, Y. Yan, N. Kurz, S. Pietri, A. Chatillon, L. Grente, J. Taieb, G. Boutoux, Herbert A. Simon, J. L. Rodriguez-Sanchez, B. Fernández-Domínguez, D. Ramos, J. F. Martin, J. Vargas, D. Cortina-Gil, C. Rodriguez-Tajes, C. Nociforo, C. Paradela, T. Gorbinet, L. Tassan-Got, M. Caamaño, B. Löher, H. Törnqvist, A. Kelic-Heil, H. Alvarez-Pol, E. Pellereau, Helmut Weick, L. Audouin, K.-H. Schmidt, B. Laurent, J. Benlliure, Beatriz Jurado, Yassid Ayyad, F. Farget, Simon Lindberg, Andreas Martin Heinz, G. Belier, D. M. Rossi, Bernd Voss, DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), 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), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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)

Subjects
Range (particle radiation), Spectrometer, 010308 nuclear & particles physics, Fragment (computer graphics), Fission, Computer science, Physics, QC1-999, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Engineering physics, Coincidence, Nuclear physics, 0103 physical sciences, Physics::Atomic and Molecular Clusters, 010306 general physics, Nuclear Experiment
Abstract

Open Access article distributed under the terms of the Creative Common attribution Licence 4.0; International audience; SOFIA (Studies On Fission with Aladin) is a new experimental setup dedicated to accurate measurement of fission-fragments isotopic yields. It is located at GSI, the only place to use inverse kinematics at relativistic energies in order to study the (γ,f) electromagnetic-induced fission. The SOFIA setup is a large-acceptance magnetic spectrometer, which allows to fully identify both fission fragments in coincidence on the whole fission-fragment range. This paper will report on fission yields obtained in 234,235,236,238 U(γ,f) reactions.

Published
2015
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19. Proton-induced fission cross sections on $^{208}$Pb at high kinetic energies

Author

Rodriguez-Sanchez, J.L., Benlliure, J., Taïeb, J., Chatillon, A., Paradela, C., Ayyad, Y., Bélier, G., Boutoux, G., Casarejos, E., Gorbinet, T., Laurent, B., Martin, J.-F., Pellereau, E., Alvarez-Pol, H., Audouin, L., Cortina-Gil, D., Heinz, A., Kelic-Heil, A., Pietras, B., Ramos, D., Rodriguez-Tajes, C., Rossi, D., Simon, H., Tassan-Got, L., Vargas, J., Voss, B., DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), 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), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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 Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
24.75.+i, 25.40.Sc, 25.85.Ge, ddc:530, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; Total fission cross sections of 208Pb induced by protons have been determined at 370A, 500A, and 650A MeV.The experiment was performed at GSI Darmstadt where the combined use of the inverse kinematics techniquewith an efficient detection setup allowed us to determine these cross sections with an uncertainty below 6%. Thisresult was achieved by an accurate beam selection and registration of both fission fragments in coincidence whichwere also clearly distinguished from other reaction channels. These data solve existing discrepancies betweenprevious measurements, providing new values for the Prokofiev systematics. The data also allow us to investigatethe fission process at high excitation energies and small deformations. In particular, some fundamental questionsabout fission dynamics have been addressed, which are related to dissipative and transient time effects.

Published
2014
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20. Investigating the Dynamics of Fission at High Excitation Energy in Reactions Induced by Relativistic Protons and Deuterons on Lead

Author

Ayyad, Y., Benlliure, J., Casarejos, E., Fernandez, M., Kurtukian Nieto, T., Perez, D., Bacquias, A., Giot, Lydie, Henzl, V., Henzlova, D., Kelic, A., Lukic, S., Nadtochy, P., Pleskac, R., Ricciardi, M.V., Schmidt, K.-H., Schmitt, C., Boudard, A., Leray, S., Enqvist, T., Farget, F., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Lion, Michel

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

Several observables such us total fission cross sections, pre-saddle neutron and gamma emission or the measurement of the fission time using crystal blocking techniques show clear indications for a delay of fission at high excitation energies when compared to other de-excitation channels, namely particle evaporation . This delay is explained as the manifestation of transient effects produced by the coupling between intrinsic and collective degrees of freedom in fission. This coupling can be macroscopically understood as a dissipative process. Moreover, the investigation of proton induced fission on lead is relevant for the radiological characterization of spallation targets. In this work we will present measurements of total fission cross sections and charge distributions of the fission fragments produced in proton and deuteron on lead reactions at relativistic energies. The experiment was performed in inverse kinematics at GSI Darmstadt. Beams of lead ions were accelerated by the SIS18 synchrotron at 500 A MeV impinging then onto a liquid hydrogen/deuterium target. Projectile reaction residues, in particular fission fragments flying forward, were identified using a set of plastic scintillators and ionization chambers. Measured data were used to benchmark model calculations describing residual nuclei production in spallation reactions. In particular we used several model calculations to prove the sensitivity of the width of the charge distributions of the fission fragments to the temperature reached by the fissioning system at saddle. The deduced temperatures are clearly influenced by transient effects which cool down the fissioning nuclei from ground to saddle.

Published
2013

21. Fission in Lead on Proton and Deuteron Reactions at 500 A MeV

Author

Daniela Henzlova, Enrique Casarejos, Alain Boudard, D. Perez, Timo Enqvist, J. Benlliure, C. Schmitt, F. Farget, V. Henzl, T. Kurtukian, S. Lukic, L. Giot, R. Pleskak, A. Bacquias, S. Leray, M. Fernandez, P. N. Nadtochy, Son Nguyen Ngoc, A. Kelic-Heil, K.-H. Schmidt, Yassid Ayyad, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, Cold fission, Cluster decay, Proton, 010308 nuclear & particles physics, Fission, Projectile, Nuclear Theory, Nuclear data, Charge (physics), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Deuterium, 0103 physical sciences, Physics::Atomic and Molecular Clusters, Atomic physics, 010306 general physics, Nuclear Experiment
Abstract

International audience; Fission induced by lead projectiles impinging protons and deuterons at 500 A MeV has been investigated using inverse kinematics. Total fission cross sections and charge distributions of both fission fragments have been determined. The accuracy of the measured cross sections has solved some previous discrepancies. Partial fission cross sections and the widths of the charge distributions of the fission fragments, both investigated as a function of the sum of the charge of both fission fragments, clearly indicate the role of dynamical effects in high energy fission.

Published
2013
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22. Transient effects in proton-induced fission of 208Pb

Author

Ayyad, Y., Benlliure, J., Kelic-Heil, A., Schmidt, K.-H., Casarejos, E., Bacquias, A., Boudard, A., Enqvist, T., Fernandez, M., Henzl, V., Henzlova, V., Jurado, B., Kurtukian Nieto, T., Lukic, S., Nadtochy, P., Pérez-Loureiro, D., Rejmund, F., Ricciardi, M.V., Schmitt, C., Nguyen Ngoc, Son, Université de Strasbourg (UNISTRA), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Aval du cycle et Energie Nucléaire (ACEN), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (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), Noyaux exotiques (NEX), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Francesco Cerutti, Mark Chadwick, Alfredo Ferrari, Toshihiko Kawano, Simone Bottoni, Luna Pellegri, 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), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Lion, Michel, and Francesco Cerutti, Mark Chadwick, Alfredo Ferrari, Toshihiko Kawano, Simone Bottoni, Luna Pellegri

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2012

23. Study of Isomer Production Rates for A=142-152 and Z=62-67 in Fragmentation of a Relativistic 208Pb Beam

Author

Podolyák, Zs., Steer, S.J., Piétri, S., Werner-Malento, E., Regan, P.H., Rudolph, D., Garnsworthy, A.B., Hoischen, R., Górska, M., Gerl, J., Wollersheim, H.J., Kurtukian Nieto, T., Benzoni, G., Becker, F., Bednarczyk, P., Caceres, L., Doornenbal, P., Geissel, H., Grebosz, J., Kelic, A., Kojouharov, I., Kurz, N., Montes, F., Prokopowicz, W., Saito, T., Schaffner, H., Tashenov, S., Heinz, A., Pfützner, M., Hellström, M., Jungclaus, A., Andersson, L.-L., Atanasova, L., Balabanski, D.L., Bentley, M.A., Blank, Bertram, Blazhev, A., Brandau, C., Brown, J., Bruce, A.M., Camera, F., Catford, W.N., Cullen, I.J., Dombrádi, Zs., Estevez, E., Fahlander, C., Gelletly, W., Ilie, G., Johansson, E.K., Jolie, J., Jones, G.A., Kmiecik, M., Kondev, F.G., Lalkovski, S., Liu, Z., Maj, A., Myalski, S., Shizuma, T., Simons, A.J., Schwertel, S., Walker, P.M., Wieland, O., Brown, B.A., Noyaux exotiques (NEX), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), 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
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

NUCLEAR REACTIONS 9Be(208Pb, X)195Pb/196Pb/192Tl/202Po/188Hg/200Po/192Pb/194Pb/198Po/200Po/195Bi/197Bi/193Pb/206Pb/203Tl/205Tl/205Pb/211Bi/204Tl/142Sm/143Eu/145Eu/144Eu/144Gd/152Ho/153Ho/147Gd/148Tb/177Ta/136Sm/138Gd/174Hf/175Hf/176Hf/175Ta/177Ta/179W/181W/181Re/185Re/176Ta/180W/206Hg/182W/200Pt/179Ta/180Ta/203Hg/203Au, E=1 GeV/nucleon; measured reaction products; deduced J, π, isomeric states and ratios. Comparison with theoretical predictions.

Published
2012
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24. Fragmentation of spherical radioactive heavy nuclei as a novel probe of transient effects in fission

Author

C. Schmitt, B. Jurado, A. Kelic, Andreas Martin Heinz, P. N. Nadtochy, K.-H. Schmidt, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), 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), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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)

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Fission, Hadron, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear matter, 01 natural sciences, Nuclear physics, Excited state, 0103 physical sciences, Atomic number, Nuclear Experiment (nucl-ex), Atomic physics, 010306 general physics, Nucleon, Nuclear Experiment, 24.75.+I, 24.10.-I, 27.70.Mn, 25.75.-q, Radioactive decay
Abstract

Peripheral collisions with radioactive heavy-ion beams at relativistic energies are discussed as an innovative approach for probing the transient regime experienced by fissile systems evolving towards quasi-equilibrium. A dedicated experiment using the advanced technical installations of GSI, Darmstadt, permitted to realize ideal conditions for the investigation of relaxation effects in the meta-stable well. Combined with a highly sensitive experimental signature, it provides a measure of the transient effects with respect to the flux over the fission barrier. Within a two-step reaction process, 45 proton-rich unstable spherical isotopes produced by projectile-fragmentation of a stable 238U beam have been used as secondary projectiles. The fragmentation of the radioactive projectiles on lead results in nearly spherical compound nuclei which span a wide range in excitation energy and fissility. The decay of these excited systems by fission is studied with a dedicated set-up which permits the detection of both fission products in coincidence and the determination of their atomic numbers with high resolution. The width of the fission-fragment nuclear charge distribution is shown to be specifically sensitive to pre-saddle transient effects and is used to establish a clock for the passage of the saddle point. The comparison of the experimental results with model calculations points to a fission delay of (3.3+/-0.7).10-21s for initially spherical compound nuclei, independent of excitation energy and fissility. This value suggests a nuclear dissipation strength at small deformation of (4.5+/-0.5).1021s-1. The very specific combination of the physics and technical equipment exploited in this work sheds light on previous controversial conclusions., 38 pages, 15 figures

Published
2010
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25. Isomeric states in neutron-deficient A ∼ 80–90 nuclei populated in the fragmentation of 107Ag

Author

Garnsworthy, A.B., Regan, P.H., Piétri, S., Sun, Y., Xu, F.R., Rudolph, D., Gorska, M., Caceres, L., Podolyak, Zs., Steer, S.J., Hoischen, R., Heinz, A., Becker, F., Bednarczyk, P., Doornenbal, P., Geissel, H., Gerl, J., Grawe, H., Grebosz, J., Kelic, A., Kojouharov, I., Kurz, N., Montes, F., Prokopwicz, W., Saito, T., Schaffner, H., Tachenov, S., Werner-Malento, E., Wollersheim, H.J., Benzoni, G., Blank, Bertram, Brandau, C., Bruce, A.M., Camera, F., Catford, W.N., Cullen, I.J., Dombradi, Z., Estevez, E., Gelletly, W., Ilie, G., Jolie, J., Jones, G.A., Jungclaus, A., Kmiecik, M., Kondev, F.G., Kurtukian Nieto, T., Lalkovski, S., Liu, Z., Maj, A., Myalski, S., Pfutzner, M., Schwertel, S., Shizuma, T., Walker, Pm., Wieland, O., Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), 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)

Subjects
Nuclear Theory, 29.30.Kv, 23.20.Lv, 23.35.+g, 27.50.+e, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

The relativistic projectile fragmentation of a 750 MeV per nucleon beam of 107Agwas used to populate isomeric states in neutron-deficient nuclei around A = 80–90. Reaction products were separated and unambiguously identified using the GSI FRagment Separator (FRS) and its ancillary detectors. At the final focal plane, the fragments were slowed from relativistic energies by means of an aluminium degrader and implanted in a passive stopper in the center of the high-efficiency, high-granularity Stopped Rare Isotope Spectroscopic INvestigation at GSI (RISING) germanium array. This allowed the identification of excited states in the N = Z nuclei 86 43Tc and, for the first time, 82 41Nb. Isomeric states have also been identified for the first time in 87,88Tc, and a previously unreported isomer was observed in 84Nb. Experimental results are presented along with a discussion on the structure of these nuclei based on interpretations provided by several theoretical models.

Published
2009
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26. Tailoring transient effects with fission of radioactive heavy-ion beams

Author

Schmitt, C., Kelic, A., Schmidt, K.-H., Heinz, A., Jurado, B., Nadtochy, P.N., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Helmholtz zentrum für Schwerionenforschung GmbH (GSI)

Subjects
electric potential, Nuclear Theory, radioactive waste, fission, heavy ion-nucleus reactions, nuclear fragmentation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, 25.70.Jj, 21.10.Sf, 25.70.Mn, 29.25.Rm
Abstract

International audience; An innovative approach for studying transient effects in nuclear fission is proposed. Fragmentation of radioactive actinides is employed to prepare fissile nuclei in well-defined initial conditions, and the fission-fragment nuclear charge distribution is used to establish a clock for the dynamical evolution of the system. Based on a so-far un-reached large number of fissioning systems, the study demonstrates the undeniable manifestation of transient effects at high excitation energy and addresses the question about the influence of initial deformation.

Published
2009
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27. ELISe: a new facility for unprecedented experimental nuclear fission studies

Author

E. Dupont, A. Chatillon, M. Aiche, Burkart Voss, G. Belier, C. Schmitt, J. Peyre, J. Taieb, L. Audouin, B. Jurado, V. Ricciardi, S. Czajkowski, P. Rosier, E. Bertoumieux, Alain Letourneau, C. Jouanne, A. Kelic, T. Granier, C. Diop, Diane Doré, M. Coste-Delclaux, L. Tassan-Got, K.-H. Schmidt, S. Panebianco, DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Service des Réacteurs et de Mathématiques Appliquées (SERMA), Département de Modélisation des Systèmes et Structures (DM2S), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Département de Physique Nucléaire (ex SPhN) (DPHN), 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, Service d’Études des Réacteurs et de Mathématiques Appliquées (SERMA), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-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), and 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)

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Fission, Nuclear Theory, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, law.invention, Nuclear physics, law, Nuclear fission, 0103 physical sciences, Physics::Accelerator Physics, Neutron, 010306 general physics, Collider, Nuclear Experiment
Abstract

A novel experimental program aiming to study the properties of fragments and neutrons emitted in the fission process has been initiated. The experiment will be held at the ELISe electron-ion collider to be constructed at GSI, Darmstadt in the framework of the FAIR extension of the facility. The experiment will take advantage of the inverse kinematics allowing, in particular, a total mass and charge resolution for all fission fragments.

Published
2009
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28. Experimental investigation of the residues produced in the 136Xe+Pb and 124Xe+Pb fragmentation reactions at 1 A GeV

Author

HENZLOVA, D., SCHMIDT, K.-H., RICCIARDI, M. V., KELIC, A., HENZL, V., NAPOLITANI, P., AUDOUIN, L., BENLLIURE, J., BOUDARD, A., CASAREJOS, E., DUCRET, J. E., ENQVIST, T., HEINZ, A., JUNGHANS, A., JURADO, B., KRASA, A., KURTUKIAN NIETO, T., LERAY, S., ORDONEZ, M. F., PEREIRA, J., PLESKAC, R., REJMUND, F., SCHMITT, C., STEPHAN, C., TASSAN-GOT, L., VILLAGRASA, C., VOLANT, C., WAGNER, A., YORDANOV, O., Helmholtz zentrum für Schwerionenforschung GmbH (GSI), 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), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Département de Physique Nucléaire (ex SPhN) (DPHN), 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, 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), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

This paper presents the nuclide cross sections and the longitudinal velocity distributions of residues produced in the reactions of 136Xe and 124Xe at 1 A GeV in a lead target, measured at the high-resolution magnetic spectrometer, the Fragment Separator (FRS) of GSI. The data cover a broad range of isotopes of the elements between Z = 3 and Z = 56 for 136Xe and between Z = 5 and Z = 55 for 124Xe, reaching down to cross sections of a few microbarns. The velocity distributions exhibit a Gaussian shape for masses above A = 20, while more complex behaviour is observed for lighter masses. The isotopic distributions for both reactions preserve a memory on the projectile N/Z ratio over the whole residue mass range., Comment: 31 pages, 9 figures, 1 table, background information on http://www.gsi.de/charms

Published
2008
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29. Neutron–proton pairing competition in N = Z nuclei: Metastable state decays in the proton dripline nuclei NB-82(41) and Tc-86(43)

Author

Garnsworthy, AB, Regan, PH, Caceres, L, Pietri, S, Sun, Y, Rudolph, D, Gorska, M, Podolyak, Z, Steer, SJ, Hoischen, R, Heinz, A, Becker, F, Bednarczyk, P, Doornenbal, P, Geissel, H, Gerl, J, Grawe, H, Grebosz, J, Kelic, A, Kojouharov, I, Kurz, N, Montes, F, Prokopowicz, W, Saito, T, Schaffner, H, Tachenov, S, Werner-Malento, E, Wollersheim, HJ, Benzoni, G, Blank, BB, Brandau, C, Bruce, AM, Camera, F, Catford, WN, Cullen, IJ, Dombradi, Z, Estevez, E, Gelletly, W, Ilie, G, Jolie, J, Jones, GA, Jungclaus, A, Kmiecik, M, Kondev, FG, Kurtukian-Nieto, T, Lalkovski, S, Liu, Z, Maj, A, Myalski, S, Pfutzner, M, Schwertel, S, Shizuma, T, Simons, AJ, Walker, PM, Wielandi, O, Xu, FR, 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), Universidad de Santiago de Compostela, and Universidad de Santiago de Compostela [Spain] (USC)

Subjects
Nuclear Theory, 29.30.Kv, 23.20.Lv, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

The low-lying structures of the self-conjugate (N = Z) nuclei Nb-82(41)41 andTc-86(43)43 have been investigated using isomeric-decay spectroscopy following the projectile fragmentation of a Ag-107 beam. These represent the heaviest odd–odd N = Z nuclei in which internal decays have been identified to date. The resulting level schemes shed light on the shape evolution along the N = Z line between the doubly-magic systems Ni-56(28) and Sn-100(50) and support a preference for T = 1 states in Tz = 0 odd–odd nuclei at low excitation energies associated with a T = 1 neutron–proton pairing gap. Comparison with Projected Shell Model calculations suggests that the decay in Nb-82 may be interpreted as an isospin-changing K isomer.

Published
2008
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30. Production of medium-mass neutron-rich nuclei in reactions induced by $^{136}$Xe projectiles at 1 A GeV on a beryllium target

Author

Benlliure, J., Fernandez-Ordonez, M., Audouin, L., Boudard, A., Casarejos, E., Ducret, J. E., Enqvist, T., Heinz, A., Henzlova, D., Henzl, V., Kelic, A., Leray, S., Napolitani, P., Pereira, J., Rejmund, F., Ricciardi, M. V., Schmidt, K. -H., Schmitt, C., Stephan, C., Tassan-Got, L., Volant, C., Villagrasa, C., Yordanov, O., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Département 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), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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 Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear Theory, FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

Production cross sections of medium-mass neutron-rich nuclei obtained in the fragmentation of 136Xe projectiles at 1 A GeV have been measured with the FRagment Separator (FRS) at GSI. 125Pd was identified for the first time. The measured cross sections are compared to 238U fission yields and model calculations in order to determine the optimum reaction mechanism to extend the limits of the chart of the nuclides around the r-process waiting point at N=82., 9 pages, 6 figures

Published
2008
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31. Residue production in 136Xe + p spallation reaction

Author

P. Napolitani, Andreas Martin Heinz, Enrique Casarejos, T. Enqvist, O. Yordanov, T. Kurtukian, M. Bernas, R. Pleskac, J. Pereira, M. Fernandez-Ordonez, P. Armbruster, C. Volant, D. Henzlova, V. Henzl, A. Junghans, A. Boudard, B. Jurado, A. Kelic, C. Stéphan, L. Tassan-Got, M. V. Ricciardi, L. Giot, A. Wagner, L. Audouin, J.-E. Ducret, A. Krasa, J. Benlliure, K.-H. Schmidt, Ch. Schmitt, C.O. Bacri, S. Leray, F. Rejmund, C. Villagrasa, C. Paradela, Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), Département de Physique Nucléaire (ex SPhN) (DPHN), 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, 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), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Residue (chemistry), Engineering, Waste management, Chemical engineering, business.industry, Nuclear Theory, Nuclear data, Physics::Accelerator Physics, Spallation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], business, Nuclear Experiment, 7. Clean energy
Abstract

Commune avec ACEN; International audience; A research program on spallation reactions in inverse kinematics has been performed at GSI, Darmstadt, taking advantage of the relativistic heavy-ions beams available from GSI accelerators and the high-resolution magnetic spectrometer, used to identify the reactions products in-flight and to determine their kinematical properties. In this paper, we report the results obtained up to now on the spallation reaction 136Xe on protons, focusing on 500 and 200 AMeV energies.

Published
2007
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32. Measurement of the complete nuclide production and kinetic energies of the system $^{136}$Xe + hydrogen at 1 GeV per nucleon

Author

Napolitani, P., Schmidt, K. -H., Tassan-Got, L., Armbruster, P., Enqvist, T., Heinz, A., Henzl, V., Henzlova, D., Kelic, A., Pleskac, R., Ricciardi, M. V., Schmitt, C., Yordanov, O., Audouin, L., Bernas, M., Lafriaskh, A., Rejmund, F., Stephan, C., Benlliure, J., Casarejos, E., Ordonez, M. Fernandez, Pereira, J., Boudard, A., Fernandez, B., Leray, S., Villagrasa, C., Volant, C., 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), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), 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), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), 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), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear Theory, FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

We present an extensive overview of production cross sections and kinetic energies for the complete set of nuclides formed in the spallation of 136Xe by protons at the incident energy of 1 GeV per nucleon. The measurement was performed in inverse kinematics at the FRagment Separator (GSI, Darmstadt). Slightly below the Businaro-Gallone point, 136Xe is the stable nuclide with the largest neutron excess. The kinematic data and cross sections collected in this work for the full nuclide production are a general benchmark for modelling the spallation process in a neutron-rich nuclear system, where fission is characterised by predominantly mass-asymmetric splits., Comment: 18 pages, 14 figures

Published
2007
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33. Exciting isomers from the first stopped-beam RISING campaign

Author

W. Gelletly, J. R. Brown, L. Atanasova, H. J. Wollersheim, S. J. Steer, AJ Simons, W. Prokopowicz, T. Shizuma, D. L. Balabanski, F. Becker, Piotr Bednarczyk, N. Kurz, M. Kmiecik, S. Pietri, Zs. Podolyák, J. Gerl, Robert Hoischen, A. Jungclaus, G. A. Jones, M. Górska, L. Caceres, Z. Liu, P. H. Regan, Philip M Walker, I. J. Cullen, Fernando Montes, Stanislav Tashenov, Zs. Dombradi, I. Kojouharov, Andreas Martin Heinz, F. Camera, G. Benzoni, Emma Johansson, S. Lalkovski, B. Blank, J. Jolie, M. Pfützner, Dirk Rudolph, C. Brandau, A. Blazhev, G. Ilie, J. Grebosz, S. Schwertel, E. Estevez, Lise-Lotte Andersson, P. Doornenbal, Margareta Hellström, H. Schaffner, A. Maj, O. Wieland, T. Kurtukian-Nieto, W. N. Catford, Hans Geissel, F. G. Kondev, A. B. Garnsworthy, M. A. Bentley, T. Saito, S. Myalski, E. Werner-Malento, Claes Fahlander, Alison Bruce, A. Kelic, Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), 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)

Subjects
Physics, Range (particle radiation), Proton, Isotope, 010308 nuclear & particles physics, Nuclear Theory, Nuclear structure, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Settore FIS/04 - Fisica Nucleare e Subnucleare, Semiconductor detector, Nuclear physics, 23.20.-g – 23.50.+z – 25.70.Mn – 27.40.+z – 27.50.+e, Isospin, 0103 physical sciences, General Materials Science, Physical and Theoretical Chemistry, Nuclear Experiment, 010306 general physics, Spectroscopy, Beam (structure)
Abstract

First results are reported from a major new initiative of experiments, which focus on nuclear structure studies at extreme isospin values by means of isomer spectroscopy. The experiments represent the first part of the so-called stopped-beam campaign within the Rare ISotope INvestigations at GSI (Rising) project. Time-correlated γ decays from individually identified nuclear species have been measured, allowing the clean identification of isomeric decays in a wide range of exotic nuclei both at the proton drip-line and in heavy, neutron-rich systems. An overview of the experimental technique will be given, together with the performance of the new germanium detector array and future research plans for the collaboration.

Published
2007
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34. RISING: Gamma-ray Spectroscopy with Radioactive Beams at GSI

Author

Doornenbal, P., Bürger, A., Rudolph, D., Grawe, H., Hübel, H., H. Regan, P., Reiter, P., Banu, A., Beck, T., Becker, F., Bednarczyk, P., Caceres, L., Geissel, H., Gerl, J., Górska, M., Grbosz, J., Kavatsyuk, M., Kavatsyuk, O., Kelic, A., Kojouharov, I., Kurz, N., Lozeva, Radomira, Montes, F., Prokopowicz, W., Saito, N., Saito, T., Schaffner, H., Tashenov, S., Weick, H., Werner-Malento, E., Winkler, M., Wollersheim, H.-J., Al-Khatib, A., Andersson, L.-L., Atanasova, L., Balabanski, D.L., Bentley, M.A., Benzoni, G., Blazhev, A., Bracco, A., Brambilla, S., Brandau, C., Bringel, P., R. Brown, J., Camera, F., Chmel, S., Clément, E., Crespi, F.C.L., Fahlander, C., Garnsworthy, A.B., Görgen, A., Hammond, G., Hellström, M., Hoischen, R., Honma, H., Johansson, E.K., Jungclaus, A., Kmieciek, M., Korten, W., Maj, A., Mandal, S., Meczynski, W., Million, B., Neußer, A., Nowacki, F., Otsuka, T., Pfützner, M., Piétri, S., Podolyák, Zs., Richard, A., Seidlitz, M., J. Steer, S., Striepling, T., Utsuno, T., Walker, J., Warr, N., Wheldon, C., Wieland, O., Steer, S.J., 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), Arnould M., Lewitowicz M., Emling H., Akimune H., Ohta M., Utsunomiya H., Wada T., Yamagata t., and RISING

Subjects
Physics, Isotope, Nuclear Theory, Nuclear structure, 020206 networking & telecommunications, 02 engineering and technology, nuclear fragmentation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear matter, 7. Clean energy, Ion, Nuclear physics, gamma-ray spectroscopy, nuclear matter, 0202 electrical engineering, electronic engineering, information engineering, heavy ion-nucleus reactions, 020201 artificial intelligence & image processing, Neutron, Gamma spectroscopy, 29.30.Kv, 29.25.Rm, 21.65.+f, 25.70.Mn, 25.75.-q, Atomic physics, Nuclear Experiment, radioactive ion beams, Excitation, Beam (structure)
Abstract

International audience; The Rare Isotope Spectroscopic INvestigation at GSI (RISING) project is a major pan-European collaboration. Its physics aims are the studies of exotic nuclear matter with abnormal proton-to-neutron ratios compared with naturally occurring isotopes. RISING combines the FRagment Separator (FRS) which allows relativistic energies and projectile fragmentation reactions with EUROBALL Ge Cluster detectors for $\gamma$ spectroscopic research. The RISING setup can be used in two different configurations. Either the nuclei of interest are investigated after being stopped or the heavy ions hit a secondary target at relativistic energies and the thereby occurring excitations are studied. For the latter case, MINIBALL Ge detectors and the HECTOR array are used in addition. Example achievements of the Fast Beam setup are presented and compared to various shell model calculations, while for the Stopped Beam setup initial results are shown.

Published
2006
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35. Spallation studies at GSI

Author

GIOT, Lydie, NAPOLITANI, P., F. ORDONEZ, M., HENZLOVA, D., AUDOUIN, L., BENLLIURE, J., BOUDARD, A., CASAJEROS, E., E. DUCRET, J., ENQVIST, T., HEINZ, A., HENZL, V., JUNGHANS, A., JURADO, B., KELIC, A., KRASA, A., KURTUKIAN NIETO, T., LERAY, S., PEREIRA, J., PLESKAC, R., REJMUND, F., V. RICCIARDI, M., SCHMITT, C., STEPHAN, C., SCHMIDT, K.-H., TASSAN-GOT, L., VILLAGRASA, C., VOLANT, C., WAGNER, A., YORDANOV, O., Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Département 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), 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), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Gadioli E., Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics::Instrumentation and Detectors, Physics::Accelerator Physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; An extended experimental and theoretical campaign dedicated to the studies of spallation reactions in inverse kinematics has been performed at GSI, Darmstadt. This research program on spallation reactions is based on an innovative experimental approach, which exploits the unique installations of GSI: the accelerator complex provides heavy-ion beams at relativistic energies, while a high-resolution magnetic spectrometer is used to identify the reaction products in-flight in mass and atomic number and to determine their kinematical properties. In this paper, we report the results obtained in this program on the spallation of 136Xe on protons at 500 A MeV.

Published
2006

36. Very heavy fission fragments produced in the spallation reaction $^{238}$U+p at 1 A GeV

Author

Bernas, M., Armbruster, P., Benlliure, J., Boudard, A., Casarejos, E., Enqvist, T., Kelic, A., Legrain, R., Leray, S., Pereira, J., Rejmund, F., Ricciardi, M.-V., Schmidt, K.-H., Stéphan, C., Taieb, J., Tassan-Got, L., Volant, C., 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), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)

Subjects
Relevance for ADS and production of radioactive beams, Inverse kinematics method, In-flight separation in magnetic spectrometer, 24.75.+i: 25.40.Sc: 25.85.Ge: 28.50.Dr: 29.25.Rm, fission cross section and velocity measurements for 283 isotopes from Gd up to Re, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Z and A identification by ToF and energy-loss
Abstract

18 pages, latex, elsart.cls, 7 figures, submitted to Nuclear Physics A - PACS; Fission Fragments from 1 A GeV $^{238}$U ions impinging a hydrogen target were studied using the fragment separator FRS from GSI for magnetic selection including ray-tracing, and $\Delta$E-ToF techniques. From the kinematics of the fragments, binary fission can be assigned as production process up to very heavy fragments. Fission fragments were identified as far as $^{184}$Re for the first time. Cross sections are measured and found in the range of 500 $\mu$b to 5 $\mu$b. Isobaric cross sections decrease smoothly with increasing mass. Beyond tungsten, fission fragments are hidden in the more abundant spallation evaporation residues. Fission cross sections of 283 isotopes of Gd to Re in the mass range 147 to 184 were obtained. All fragments result from fission of excited parent nuclei and after emission of secondary neutrons

Published
2006
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37. SPALADIN : Coincidence measurements of $^{56}$Fe+p at 1 A.GeV kinetic energy in inverse kinematics

Author

Ducret, J.-É, Piétri, S., Böhmer, M., Lafriakh, A., Le Gentil, E., Aumann, T., Bacri, C.-O., Benlliure, J., Boudard, A., Casajeros, E., Combet, M., Fernandez-Ordonez, M., Gernhaüser, R., Johansson, H., Kelic, A., Kezzar, K., Krücken, R., Kurtukian Nieto, T., Le Fèvre, A., Leray, S., Lukasik, J., Müller, W.F.J., Rejmund, F., Schwarz, C., Sfienti, C., Simon, H., Trautmann, W., Volant, C., Yordanov, O., Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de 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), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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 Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2005

38. Exclusive Spallation Measurements on $^{56}$Fe+p with the SPALADIN setup

Author

F. Rejmund, E. Le Gentil, S. Leray, E. Casarejos, C.O. Bacri, C. Volant, R. Krücken, J. Benlliure, Cornelius Schwarz, A. Le Fèvre, J.-E. Ducret, Thomas Aumann, Michel Combet, A. Boudard, H. Simon, M. Fernandez-Ordoñez, S. Pietri, A. Lafriakh, M. Böhmer, C. Sfienti, J. Lukasik, A. Kelic, Roman Gernhäuser, O. Yordanov, W. Trautmann, K. Kezzar, T. Kurtukian-Nieto, Håkan T Johansson, W. F. J. Müller, Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de 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), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), S.V. Harissopulos, P. Demetriou, E. Julin, 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 Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Inverse kinematics, 020206 networking & telecommunications, Charge (physics), 02 engineering and technology, 25.40.Sc, 27.40.+z, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nuclear spallation, Coincidence, Nuclear physics, nuclei with mass number 39 to 58, iron, proton-nucleus reactions, 0202 electrical engineering, electronic engineering, information engineering, Cluster (physics), Physics::Accelerator Physics, 020201 artificial intelligence & image processing, Spallation, Atomic physics, Ion emission, Nuclear Experiment
Abstract

First coincidence data on the $^(56}$Fe+p reaction at 1 A.GeV in inverse kinematics obtained with the SPALADIN setup are presented. Data on charge correlations of cluster emissions occurring in the spallation reaction are shown and compared to spallation codes with the aim of discriminating between the various de-excitation mechanisms.

Published
2005
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39. Isotopic Yields of Fission Fragments from Transfer-Induced Fission

Author

A. Kelic, L. Tassan-Got, F. Rejmund, K.-H. Schmidt, M. Rejmund, M. Morjean, E. Casarejos, N. Alahari, J.D. Frankland, G. Barreau, C. Schmitt, B. Jurado, M. V. Ricciardi, T. Enqvist, J. Benlliure, C.O. Bacri, H. Savajols, W. Mittig, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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), 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), H. Goutte, H. Faust, G. Fioni, D. Goutte, Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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 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)

Subjects
Mass number, Cold fission, Cluster decay, Isotope, Fission, Chemistry, Isotopes of samarium, Nuclear Theory, 020206 networking & telecommunications, 02 engineering and technology, Fission product yield, nuclear fragmentation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Kinetic energy, 7. Clean energy, Nuclear physics, 25.85.-w, 24.75.+i, 25.70.Hi, 0202 electrical engineering, electronic engineering, information engineering, fission, 020201 artificial intelligence & image processing, Nuclear Experiment, isotopes
Abstract

PACS; International audience; It is proposed to use transfer-induced fission in inverse kinematics coupled to the large acceptance spectrometer VAMOS to identify in atomic and mass number the complete distribution of the fission fragments. The measure of the kinetic properties of the transfer partner allows for determining precisely the excitation of the fissioning system. For the first time, the isotopic yields of the heavy and light fragments may be measured as a function of the excitation energy in neutron-rich actinides.

Published
2005
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40. Isotopically resolved residues from the fragmentation of projectiles with largely different N/Z - the isospin-thermometer method

Author

C. Villagrasa, C. Stephan, J. Benlliure, J.-E. Ducret, Enrique Casarejos, O. Yordanov, M. V. Ricciardi, S. Leray, C. Volant, K.-H. Schmidt, A. S. Botvina, C. Schmitt, Daniela Henzlova, R. Pleskac, A. Kelic, Andreas Wagner, A. Boudard, L.T. Got, Arnd R. Junghans, F. Rejmund, Andreas Martin Heinz, T. Kurtukian, B. Jurado, V. Henzl, P. Napolitani, J. Pereira, M. F. Ordonez, T. Enqvist, L. Audouin, A. Krasa, 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), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), 010308 nuclear & particles physics, Projectile, Evaporation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Fragmentation (mass spectrometry), Thermometer, Isospin, 0103 physical sciences, Atomic physics, 010306 general physics, Excitation
Abstract

PACS; International audience; The mean N-over-Z (/Z) ratio of residues produced in the fragmentation of 136Xe (N/Z=1.519), 124Xe (N/Z=1.296) in comparison with 56Fe (N/Z=1.154) is investigated over the full range of Z. The final residues from the 136Xe projectile keep a memory on the initial N/Z. The idea to trace back the excitation energy of the fragment entering evaporation via direct exploration of the N/Z evolution in the evaporation process is investigated and applied to the data. The freeze-out temperature is deduced, which is consistent with the investigations of light and intermediate-mass fragments (IMF) in other experiments.

Published
2004
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41. 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

42. Isotopic and velocity distributions of $_{83}$Bi produced in charge-pickup reactions of $^{208}_{82}$Pb at 1A GeV

Author

Kelic, A., Schmidt, K.-H., Enqvist, T., Boudard, A., Armbruster, P., Benlliure, J., Bernas, M., Czajkowski, S., Legrain, R., Leray, S., Mustapha, B., Pravikoff, M., Rejmund, F., Stephan, C., Taieb, J., Tassan-Got, L., Volant, C., Wlazlo, W., 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), 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)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

PACS; Isotopically resolved cross sections and velocity distributions have been measured in charge-pickup reactions of 1 A GeV 208Pb with proton, deuterium and titanium target. The total and partial charge-pickup cross sections in the reactions 208Pb + 1H and 208Pb + 2H are measured to be the same in the limits of the error bars. A weak increase in the total charge-pickup cross section is seen in the reaction of 208Pb with the titanium target. The measured velocity distributions show different contributions - quasi-elastic scattering and Delta-resonance excitation - to the charge-pickup production. Data on total and partial charge-pickup cross sections from these three reactions are compared with other existing data and also with model calculations based on the coupling of different intra-nuclear cascade codes and an evaporation code.

Published
2004
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43. Complex nuclear-structure phenomena revealed from the nuclide production in fragmentation reactions

Author

A. Kelic, F. Rejmund, M. V. Ricciardi, A.V. Ignatyuk, P. Napolitani, O. Yordanov, K.-H. Schmidt, Robert, Suzanne, 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 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), and Yu.P. Penionzhkevich, E.A. Cherepanov

Subjects
Nuclear reaction, Nuclear and High Energy Physics, TheoryofComputation_COMPUTATIONBYABSTRACTDEVICES, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Theory, Binding energy, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Photochemistry, 7. Clean energy, 01 natural sciences, ComputingMethodologies_ARTIFICIALINTELLIGENCE, Nuclear physics, Fragmentation (mass spectrometry), 0103 physical sciences, Nuclide, Nuclear Experiment (nucl-ex), Nuclear Experiment, 010306 general physics, Projectile fragmentation, Physics, Chemistry, 010308 nuclear & particles physics, Nuclear structure, TheoryofComputation_GENERAL, 3. Good health, ComputingMethodologies_PATTERNRECOGNITION, Nuclear fission, Excitation
Abstract

Complex structural effects in the nuclide production from the projectile fragmentation of 1 A GeV 238U nuclei in a titanium target are reported. The structure seems to be insensitive to the excitation energy induced in the reaction. This is in contrast to the prominent structural features found in nuclear fission and in transfer reactions, which gradually disappear with increasing excitation energy. Using the statistical model of nuclear reactions, relations to structural effects in nuclear binding and in the nuclear level density are demonstrated., Comment: 19 pages, 14 figures, background information on http://www-w2k.gsi.de/kschmidt/

Published
2004

44. Indications for fast break-up processes in relativistic ion-proton collisions

Author

Napolitani, P., Schmidt, K.-H., Tassan-Got, L., Armbruster, P., Audouin, L., Bacri, C.O., Benlliure, J., Bernas, M., Botvina, A.S., Boudard, A., Casarejos, E., Enqvist, T., Fernandez, B., Fernandez Ordonez, M., Heinz, A., Henzl, V., Henzlova, D., Kelic, A., Lafriakh, A., Leray, S., Rejmund, F., Ricciardi, M.V., Schmitt, C., Stephan, C., Pereira Conca, J., Villagrasa, C., Volant, C., Yordanov, O., 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), 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), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
ComputingMethodologies_PATTERNRECOGNITION, TheoryofComputation_COMPUTATIONBYABSTRACTDEVICES, TheoryofComputation_GENERAL, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMethodologies_ARTIFICIALINTELLIGENCE
Abstract

PACS

Published
2003

45. Longitudinal momentum of projectile-like residues: a new tool to investigate the EOS

Author

Pereira, J., Ricciardi, M.V., Enqvist, T., Benlliure, J., Bernas, M., Casarejos, E., Henzl, V., Kelic, A., Taieb, J., Schmidt, K.-H., Institut de Physique Nucléaire d'Orsay (IPNO), and 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)

Subjects
ComputingMethodologies_PATTERNRECOGNITION, TheoryofComputation_COMPUTATIONBYABSTRACTDEVICES, TheoryofComputation_GENERAL, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMethodologies_ARTIFICIALINTELLIGENCE
Abstract

PACS

Published
2003

46. Temperature dependance of friction from pre - and post - scission neutron emission

Author

Rudolf, G., Kelic, A., Heyd, Yvette, Institut de Recherches Subatomiques (IReS), and 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)

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2001

47. Multimodal nature of the fission process of $^{220}$Ra, $^{226}$Th and $^{270}$Sg compound nuclei

Author

Pokrovski, I.V., Itkis, M.G., Itkis, I.M., Kozulin, E.M., Kondratiev, N.A., Oganessian, Yu.Ts., Prokhorova, E.V., Rusanov, A.Ya., Tretiakova, S.P., Kelic, A., Rudolf, G., Stuttge, L., Hanappe, F., Calabretta, L., 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 Heyd, Yvette

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2000

49. Fission modes in the reaction $^{208}$Pb($^{18}$O,f)

Author

Pokrovsky, I. V., Itkis, M. G., Itkis, J. M., Kondratiev, N. A., Kozulin, E. M., Prokhorova, E. V., Salamatin, V. S., Pashkevich, V. V., Mulgin, S. I., Rusanov, A. Ya, Zhdanov, S. V., Chubarian, G. G., Hurst, B. J., Schmitt, R. P., Agodi, C., Bellia, G., Calabretta, L., Lukashin, K., Concettina Maiolino, Kelic, A., Rudolf, G., Stuttge, L., Hanappe, F., 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 Heyd, Yvette

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], document supplier/ library /use/ bibliometric distributions, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], informetric
Abstract

This article aims at demonstrating that the study of statistical distributions in information sciences provides the tools to apprehend and define concepts related with information use and production. One will briefly outline what should be infometrics laws, then one will define what is in our sense duality and statistic information field. Simple mathematical milestones will be given. The study relies on data gathered in libraries, in a document supplier, on Web site visits. These data allow to formalize and modelize processes of information use and production . Thus, these data lead to define the concept of infometric field of use and production, with help of mathematics.

Published
2000

50. Temperature dependence of friction from pre-and post-scission neutron multiplicities

Author

Kelic, A., Rudolf, G., 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 Heyd, Yvette

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
1999

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