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1. N/Z effect on reaction mechanisms cross sections in the $^{78}Kr+^{40}Ca$ and $^{86}Kr+^{48}Ca$ collisions at 10 AMeV

Author

L. Quattrocchi, Michele Papa, F. Porto, B. Borderie, S. De Luca, Giuseppe Verde, G. Ademard, F. Rizzo, A. Pagano, B. Gnoffo, N Le Neidre, J.D. Frankland, S. Pirrone, Lucrezia Auditore, P. Lautesse, D. Lebhertz, E. De Filippo, N. S. Martorana, Antonio D'Onofrio, E. Piasecki, S. Norella, E. V. Pagano, M. La Commara, Maria Colonna, G. Politi, Ivano Lombardo, M. Trimarchi, J.P. Wieleczko, P. Russotto, K. Mazurek, G. Spadaccini, I. Bercenau, D. Dell'Aquila, Antonio Trifiro, G. Cardella, A. Chibihi, C. Beck, Eric Bonnet, G. Lanzalone, Mariano Vigilante, 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), 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 Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), 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), 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), 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)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Université de Strasbourg (UNISTRA)-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)-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)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Gnoffo, B., Pirrone, S., Politi, G., La Commara, M., Wieleczko, J. P., De Filippo, E., Russotto, P., Trimarchi, M., Vigilante, M., Ademard, G., Auditore, L., Beck, C., Bercenau, I., Bonnet, E., Borderie, B., Cardella, G., Chibihi, A., Colonna, M., Dell'Aquila, D., De Luca, S., D'Onofrio, A., Frankland, J. D., Lanzalone, G., Lautesse, P., Lebhertz, D., Le Neidre, N., Lombardo, I., Martorana, N. S., Mazurek, K., Norella, S., Pagano, A., Pagano, E. V., Papa, M., Piasecki, E., Porto, F., Quattrocchi, L., Rizzo, F., Spadaccini, G., Trifirò, A., Verde, G., 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 Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)

Subjects
Nuclear reaction, History, Isotope, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], 010308 nuclear & particles physics, Chemistry, Hadron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Charged particle, Computer Science Applications, Education, Chemical kinetics, Nuclear physics, Physics and Astronomy (all), medicine.anatomical_structure, 0103 physical sciences, medicine, Neutron, Calcium, De-excitations, Evaporation process, Long-lived systems, Multi-detectors, Reaction mechanism, Nuclear reactions, Atomic physics, 010306 general physics, Nucleon, Nucleus
Abstract

International audience; Nuclear reactions between medium-mass nuclei at low energy are characterized by the competition between binary and evaporation process in the compound nucleus de-excitation. A study of the influence of the neutron richness of the entrance channel on the decay paths of the compound nuclei formed in the (78) Kr +(40) Ca and (86) Kr +(48) Ca at 10 MeV/A is presented. The experiment has been performed at Laboratori Nazionali del Sud by using the CHIMERA 4π multidetector for charged particles. The Kinematical characteristics of the two reactions support the conclusion of a production via long lived system. Besides the results relative to the n-poor system are compared to those obtained at GANIL, performed at 5.5 AMeV, in order to study the energy influence.

Published
2016
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2. Isospin influence on the decay modes of the systems produced in the 78,86Kr +40,48Ca reactions at 10 AMeV

Author

Giuseppe Verde, S. Pirrone, Maria Colonna, M. Trimarchi, K. Mazurek, E. Geraci, G. Ademard, B. Borderie, D. Lebhertz, N. Leneidre, Ivano Lombardo, J.P. Wieleczko, G. Lanzalone, E. Piasecki, A. Pagano, U. Shoroeder, A. Chibihi, P. Lautesse, C. Beck, P. Russotto, B. Gnoffo, E. V. Pagano, F. Porto, Lucrezia Auditore, E. De Filippo, Eric Bonnet, S. Norella, Michele Papa, Jan Toke, G. Politi, Mariano Vigilante, F. Rizzo, F. Amorini, Antonio D'Onofrio, G. Cardella, E. La Guidara, J.D. Frankland, M. La Commara, E. Henry, G. Spadaccini, M. Quinlann, Antonio Trifiro, L. Quattrocchi, I. Bercenau, 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 d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Département Recherches Subatomiques (DRS-IPHC), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), 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), 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 Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université 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), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Greco, V., Gnoffo, B., Pirrone, S., Politi, G., La Commara, M., Wieleczko, J. P., De Filippo, E., Russotto, P., Trimarchi, M., Vigilante, M., Ademard, G., Amorini, F., Auditore, L., Beck, C., Bercenau, I., Bonnet, E., Borderie, B., Cardella, G., Chibihi, A., Colonna, M., D'Onofrio, A., Frankland, J. D., Geraci, E., Henry, E., La Guidara, E., Lanzalone, G., Lautesse, P., Lebhertz, D., Leneidre, N., Lombardo, I., Mazurek, K., Norella, S., Pagano, A., Pagano, E. V., Papa, M., Piasecki, E., Porto, F., Quattrocchi, L., Quinlann, M., Rizzo, F., Shoroeder, U., Spadaccini, G., Trifirò, A., Toke, J., and Verde, G.

Subjects
Physics, Reaction mechanism, 010308 nuclear & particles physics, Fission, QC1-999, Relaxation (NMR), Cyclotron, Charge (physics), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Isotopic composition, law.invention, Nuclear physics, Viscosity, Physics and Astronomy (all), law, Isospin, 0103 physical sciences, Atomic physics, 010306 general physics
Abstract

International audience; The results of the analysis of the reactions 78,86Kr +40,48 Ca at 10 AMeV are presented. The experiment was performed at the INFN Laboratori Nazionali del Sud (LNS) in Catania by using the 4π multidetector CHIMERA, with beams delivered by the Superconductive Cyclotron. The competition among the various disintegration paths and in particular the isospin effects on the decay modes of the produced composite systems are investigated; this provides information about fundamental nuclear quantities such as level density, fission barrier and viscosity. Different isotopic composition and relative richness are observed among the reaction products of the two systems. An odd-even staggering effect is present in the charge distributions, in particular for the light fragments produced by the neutron-poor system. The kinematical characteristics of the IMF seem to indicate a high degree of the relaxation of the formed system. Besides, global features analysis seems to show some differences in the contribution arising from the various reaction mechanisms for the two reactions.

Published
2016
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3. Decay competition in IMF production in the collisions 78Kr+40Ca and 86Kr+48Ca at 10 AMeV

Author

Giuseppe Verde, Jan Toke, G. Cardella, S. Pirrone, P. Lautesse, F. Rizzo, M. La Commara, C. Beck, G. Ademard, Mariano Vigilante, F. Amorini, W. U. Schroeder, P. Russotto, A. Pagano, Antonio D'Onofrio, J.P. Wieleczko, B. Gnoffo, G. Lanzalone, N. Le Neindre, Eric Bonnet, J.D. Frankland, D. Lebhertz, M. Trimarchi, K. Mazurek, Maria Colonna, E. Henry, E. Laguidara, A. Chbihi, E. De Filippo, Lucrezia Auditore, Ivano Lombardo, Elio Rosato, E. Piasecki, G. Politi, Michele Papa, B. Borderie, I. Berceanu, G. Spadaccini, M. Quinlann, Antonio Trifiro, E. Geraci, 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 d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), 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), Giorgio Giardina, Avazbek K. Nasirov, Giuseppe Mandaglio, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-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 Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université 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), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), G.Giardina , A.K.Nasirov, G.Mandaglio, S., Pirrone, G., Politi, LA COMMARA, Marco, J. P., Wieleczko, E., De Filippo, B., Gnoffo, G., Ademard, Vigilante, Mariano, F., Amorini, L., Auditore, C., Beck, I., Berceanu, E., Bonnet, B., Borderie, G., Cardella, A., Chbihi, M., Colonna, A., D’Onofrio, J. D., Frankland, E., Geraci, E., Henry, E., La Guidara, G., Lanzalone, P., Lautesse, D., Lebhertz, N., Le Neindre, Lombardo, Ivano, K., Mazurek, A., Pagano, M., Papa, E., Piasecki, M., Quinlann, F., Rizzo, Rosato, Elio, P., Russotto, W. U., Schroeder, Spadaccini, Giulio, A., Trifirò, J., Tõke, M., Trimarchi, G., Verde, Pirrone, S., Politi, G., Lacommara, M., Wieleczko, J. P., De Filippo, E., Gnoffo, B., Ademard, G., Vigilante, M., Amorini, F., Auditore, L., Beck, C., Berceanu, I., Bonnet, E., Borderie, B., Cardella, G., Chbihi, A., Colonna, M., D'Onofrio, Antonio, Frankland, J. D., Geraci, E., Henry, E., Laguidara, E., Lanzalone, G., Lautesse, P., Lebhertz, D., Neindre, N. L., Lombardo, I., Mazurek, K., Pagano, A., Papa, M., Piasecki, E., Trimarchi, M., and Verde, G.

Subjects
History, Hadron, Nuclear physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nuclear reaction, 7. Clean energy, Education, Spin, Neutron, Compound nucleus, Nucleon distributions and halo features, 25.70.Gh, 21.10.Hw, 27.50.+e, 5.70.Jj, 21.10.Gv, ComputingMilieux_MISCELLANEOUS, Isotope, Chemistry, Fusion and fusion-fission reactions, and isobaric spin, Computer Science Applications, Baryon, parity, Isospin, Atomic physics, Nucleon, Excitation, Dimensionless quantity
Abstract

De-excitation modes of compound systems 118Ba and 134Ba, produced respectively in the 78Kr+40Ca and 86Kr+48Ca collisions at 10 A.MeV, are investigated. In particular, the competition between the various disintegration decay paths of medium mass compound nuclei, formed by fusion processes and the isospin (related to N/Z) of the entrance channel influence on the decay process, are studied. Data were taken at the INFN-Laboratori Nazionali del Sud (LNS) in ISODEC experiment, by using the CHIMERA array. The experiment complements and improves the previous experiment performed at GANIL where the same mechanisms were studied at lower excitation energies. The results show the presence of a relaxed component in the reaction mechanism, evident staggering effects in the Z distributions, as well as different isotopic composition and neutron enrichment for the reaction products in the two systems.

Published
2013
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4. Decay competition for IMF produced in the collisions 78Kr+40Ca and 86Kr+48Ca at 10 A*MeV

Author

G. Cardella, Maria Colonna, D. Loria, Giuseppe Verde, S. Pirrone, F. Porto, M. La Commara, W. U. Schroeder, G. Ademard, Jan Toke, Elio Rosato, E. Geraci, J.P. Wieleczko, E. La Guidara, I. Berceanu, C. Beck, G. Spadaccini, E. De Filippo, E. Henry, F. Amorini, Eric Bonnet, A. Chbihi, Michele Papa, A. Pagano, Mariano Vigilante, M.F. Rivet, M. Quinlann, Antonio Trifiro, G. Lanzalone, Ivano Lombardo, P. Lautesse, M. Trimarchi, K. Mazurek, N. Le Neindre, Lucrezia Auditore, J.D. Frankland, D. Lebhertz, G. Politi, P. Russotto, F. Rizzo, E. Piasecki, B. Borderie, 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 d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), 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), 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 Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université 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), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), S. Lunardi, P.G. Bizzeti, C. Bucci, M. Chiari, A. Dainese, P. Di Nezza, R. Menegazzo, A. Nannini, C. Signorini, J.J. Valiente-Dobon, LA COMMARA, Marco, S., Pirrone, G., Politi, J. P., Wieleczko, G., Ademard, E., De Filippo, Vigilante, Mariano, F., Amorini, L., Auditore, C., Beck, I., Berceanu, E., Bonnet, B., Borderie, G., Cardella, A., Chbihi, M., Colonna, J. D., Frankland, E., Geraci, E., Henry, E., La Guidara, G., Lanzalone, P., Lautesse, D., Lebhertz, N., Le Neindre, Lombardo, Ivano, D., Loria, K., Mazurek, A., Pagano, M., Papa, E., Piasecki, F., Porto, M., Quinlann, F., Rizzo, Rosato, Elio, P., Russotto, W. U., Schroeder, Spadaccini, Giulio, A., Trifirò, J., Tõke, M., Trimarchi, G., Verde, 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
Nuclear reaction, Physics, Fusion, 010308 nuclear & particles physics, QC1-999, compound nucleu, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Excited state, Isospin, 0103 physical sciences, fragments, Nuclear reactions, Atomic physics, 010306 general physics
Abstract

Expérience GANIL; International audience; Decay modes of excited compound systems 118Ba and 134Ba, produced respectively in the 78Kr+40Ca and 86Kr+48Ca collisions at 10 A*MeV, are investigated. In particular, the competition between the various disintegration path of medium mass compound nuclei, formed by fusion processes, the production of the so referred Intermediate Mass Fragments (IMF), and the isospin dependence of the decay process are studied. Data were taken at the INFN-Laboratori Nazionali del Sud (LNS) by using the CHIMERA array. Data analysis is in progress; a first indication on the average-energy angular distributions suggests pre-equilibrium effects affecting the data and the presence of isotopical effects.

Published
2013
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5. Isospin influence on the decay modes of compound systems produced in the $^{78,86}$Kr + $^{40,48}$Ca at 10 AMeV

Author

E. V. Pagano, Maria Colonna, B. Borderie, Jan Toke, P. Lautesse, S. Norella, W. U. Schroeder, E. De Filippo, Ivano Lombardo, J.P. Wieleczko, P. Russotto, B. Gnoffo, E. Geraci, E. Piasecki, A. Chibihi, Giuseppe Verde, Mariano Vigilante, A. Pagano, E. La Guidara, G. Lanzalone, C. Beck, Michele Papa, F. Amorini, S. Pirrone, Marina Trimarchi, K. Mazurek, G. Spadaccini, F. Rizzo, J.D. Frankland, Eric Bonnet, G. Ademard, Antonio D'Onofrio, D. Lebhertz, Lucrezia Auditore, N. Le Neindre, G. Politi, F. Porto, G. Cardella, I. Berceanu, M. La Commara, M. Quinlann, Antonio Trifiro, L. Quattrocchi, E. Henry, 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 d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), 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), 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 Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université 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), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Kawano, T., Pirrone, S., Politi, G., Wieleczko, J. P., De Filippo, E., Gnoffo, B., Russotto, P., Trimarchi, M., La Commara, M., Vigilante, M., Ademard, G., Amorini, F., Auditore, L., Beck, C., Berceanu, I., Bonnet, E., Borderie, B., Cardella, G., Chibihi, A., Colonna, M., D'Onofrio, A., Frankland, J. D., Geraci, E., Henry, E., La Guidara, E., Lanzalone, G., Lautesse, P., Lebhertz, D., Le Neindre, N., Lombardo, I., Mazurek, K., Norella, S., Pagano, A., Pagano, E. V., Papa, M., Piasecki, E., Porto, F., Quattrocchi, L., Quinlann, M., Rizzo, F., Schroeder, W. U., Spadaccini, G., Trifiro, A., Toke, J., and Verde, G.

Subjects
Physics, Compound Nuclei, 010308 nuclear & particles physics, QC1-999, Charge (physics), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Entrance channel, Nuclear physics, Physics and Astronomy (all), Isospin, 0103 physical sciences, Compund Nucleus, Fusion reactions, Neutron, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract

International audience; The study of the decay modes competition of the compound systems produced in thecollisions 78Kr+40Ca and 86Kr+48Ca at 10AMeV is presented. In particular, the N/Z entrance channelinfluence on the decay paths of the compound systems, directly connected to the isospin influence, isinvestigated. The experiment was performed at the INFN Laboratori Nazionali del Sud (LNS) inCatania by using the 4π multi-detector CHIMERA. Charge, mass, angular distributions andkinematical features of the reaction products were studied. The analysis shows some differences in thecontribution arising from the various reaction mechanisms for the neutron poor and neutron richsystems. Comparison with theoretical statistical and dynamical models are presented for the twosystems. Besides a study of the influence of the energy on the entrance channel is performed for the78Kr+40Ca reaction, by comparing the results of this experiment to those obtained for the same systemat 5.5 AMeV with the INDRA device at GANIL.

Published
2015
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6. Decay modes of the systems formed in the reactions 78Kr+40Ca and 86Kr+48Ca

Author

F. Rizzo, J.D. Frankland, M. Quinlannl, J.P. Wieleczko, D. Lebhertz, B. Borderie, Giuseppe Verde, Michele Papa, S. Pirrone, A. Pagano, D. Loria, P. Lautesse, E. La Guidara, F. Amorini, G. Lanzalone, E. Geraci, M. Trimarchi, Lucrezia Auditore, C. Beck, K. Mazurek, Elio Rosato, A. Chbihi, M. La Commara, N. Le Neindre, A. Trifirò, G. Politi, W. U. Schroeder, Antonio D'Onofrio, P. Russotto, G. Spadaccini, E. De Filippo, Mariano Vigilante, G. Ademard, Eric Bonnet, G. Cardella, F. Porto, E. Piasecki, Jan Toke, Ivano Lombardo, I. Berceanu, E. Henry, Maria Colonna, 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), 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 Physique Nucléaire de Lyon (IPNL), 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), 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), J.D Frankland, A. Pagano, S. Pirrone, M.-F Rivet, F. Rizzo, J.D.Frankland, A.Pagano, S.Pirrone, m.F.Rivet, F.Rizzo, LA COMMARA, Marco, S., Pirrone, G., Politi, J. P., Wieleczko, G., Ademard, E., De Filippo, Vigilante, Mariano, F., Amorini, L., Auditore, C., Beck, I., Berceanu, E., Bonnet, B., Borderie, G., Cardella, A., Chbihi, M., Colonna, A., D???onofrio, J. D., Frankland, E., Geraci, E., Henry, E., La Guidara, G., Lanzalone, P., Lautesse, D., Lebhertz, N., Le Neindre, I., Lombardo, D., Loria, K., Mazurek, A., Pagano, M., Papa, E., Piasecki, F., Porto, M., Quinlannl, F., Rizzo, Rosato, Elio, P., Russotto, W. U., Schroeder, Spadaccini, Giulio, A., Trifirò, J., Tõke, M., Trimarchi, G., Verde, 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)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), 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), and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Physics, 010308 nuclear & particles physics, QC1-999, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, nuclear reaction, Lower energy, Nuclear physics, Isospin, 0103 physical sciences, isospin effect, even-odd staggering, Atomic physics, 010306 general physics
Abstract

International audience; Preliminary outcome of ISODEC experiment, performed at INFNLNS with the CHIMERA array, are presented. Disintegration path dependence on the entrance-channel N/Z ratios (isospin asymmetries) for the reactions 78Kr+40Ca and 86Kr+48Ca at 10 A*MeV, which give origin to the intermediate systems 118Ba and 134Ba, is being investigated. Staggering effects seem to be present as it was the case of a complementary measurement performed at GANIL at lower energy, i.e. 78,82Kr+40Ca at 5.5 A*MeV.

Published
2012
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7. ISODEC Experiment: study and comparison of the decay mode of 78Kr+40Ca and 86Kr+48Ca systems at 10 AMeV

Author

Antonio D'Onofrio, Maria Colonna, Giuseppe Verde, F. Rizzo, Eric Bonnet, Mariano Vigilante, Elio Rosato, C. Beck, S. Pirrone, G. Cardella, J.D. Frankland, Lucrezia Auditore, E. La Guidara, D. Lebhertz, Jan Toke, Michele Papa, M. Quinlann, G. Lanzalone, D. Loria, Antonio Trifiro, G. Politi, E. Piasecki, E. De Filippo, N. Le Neindre, M. La Commara, J.P. Wieleczko, G. Ademard, F. Porto, P. Russotto, B. Borderie, G. Spadaccini, F. Amorini, E. Geraci, W. U. Schroeder, A. Chbihi, I. Berceanu, P. Lautesse, A. Pagano, M. Trimarchi, K. Mazurek, Ivano Lombardo, E. Henry, 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 Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de 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), 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), Ch. Schmitt, A. Navin, M. Rejmund, D. Lacroix, H. Goutte, S., Pirrone, G., Politi, LA COMMARA, Marco, J. P., Wieleczko, G., Ademard, E., De Filippo, Vigilante, Mariano, F., Amorini, L., Auditore, C., Beck, I., Berceanu, E., Bonnet, B., Borderie, G., Cardella, A., Chbihi, M., Colonna, A., D’Onofrio, J. D., Frankland, E., Geraci, E., Henry, E., La Guidara, G., Lanzalone, P., Lautesse, D., Lebhertz, N., Le Neindre, I., Lombardo, D., Loria, K., Mazurek, A., Pagano, M., Papa, E., Piasecki, F., Porto, M., Quinlann, F., Rizzo, Rosato, Elio, P., Russotto, W. U., Schroeder, Spadaccini, Giulio, A., Trifirò, J., Toke, M., Trimarchi, G., Verde, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-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 de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université 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 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), and Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, 010308 nuclear & particles physics, QC1-999, compound nucleu, Nuclear reaction, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, decay modes, Nuclear physics, Isospin, 0103 physical sciences, Atomic physics, 010306 general physics
Abstract

International audience; We present the first results of the ISODEC experiment, performed at the INFN-LNS with the CHIMERA device, in order to study the competition between the various disintegration modes of 118,134Ba compound nuclei produced by bombarding 40,48Ca targets with beams of 78,86Kr at 10 AMeV. This work aims thus to explore the isospin dependence of the decay modes of medium mass compound nuclei formed by fusion processes. The experiment complements data already obtained at 5.5 MeV/A for 78,82Kr+40Ca reactions, studied by Ademard et al. with beams delivered by GANIL facility and by using the INDRA detector.

Published
2011
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8. Discovery of a new isomeric state in 68Ni: Evidence for a highly deformed proton intruder state

Author

A. Dijon, E. Clément, G. de France, G. de Angelis, G. Duchêne, J. Dudouet, S. Franchoo, A. Gadea, A. Gottardo, T. Hüyük, B. Jacquot, A. Kusoglu, D. Lebhertz, G. Lehaut, M. Martini, D. R. Napoli, F. Nowacki, S. Péru, A. Poves, F. Recchia, N. Redon, E. Sahin, C. Schmitt, M. Sferrazza, K. Sieja, O. Stezowski, J. J. Valiente-Dobón, A. Vancraeyenest, Y. Zheng, UAM. Departamento de Física Teórica, 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 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), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de 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), 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), 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 de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université 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 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, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, SHELL model, Shell (structure), FOS: Physical sciences, Física, State (functional analysis), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 3. Good health, Intruder state, medicine.anatomical_structure, 0103 physical sciences, medicine, Nuclear Experiment (nucl-ex), Atomic physics, 010306 general physics, Nucleus, Nuclear Experiment, 21.10.Re,21.60.Cs,23.20.Lv,23.35.+g,27.50.+e
Abstract

We report on the observation of a new isomeric state in $^{68}$Ni. We suggest that the newly observed state at 168(1) keV above the first 2$^+$ state is a $\pi(2p-2h)$ 0$^{+}$ state across the major Z=28 shell gap. Comparison with theoretical calculations indicates a pure proton intruder configuration and the deduced low-lying structure of this key nucleus suggests a possible shape coexistence scenario involving a highly deformed state., Comment: 5 pages, 3 figures, accepted for publication in Physical Review C

Published
2012
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9. Shape coexistence at N=20 and N=28 : study of 0+2 states in $^{34}$Si and $^{44}$S

Author

F. Azaiez, F. de Oliveira, R. Chevrier, B. Bastin, J. M. Daugas, F. Rotaru, O. Sorlin, J. C. Angélique, D. Lebhertz, I. Stefan, Zs. Dombrádi, S. M. Lukyanov, R. Borcea, L. Caceres, A. Buta, L. Gaudefroy, C. Stodel, F. Negoita, N. L. Achouri, S. Grévy, C. Force, Y. E. Penionzhkevich, S. Calinescu, Dóra Sohler, C. Petrone, J. C. Thomas, Alfredo Poves, J. Mrazek, C. Borcea, F. Nowacki, M. Stanoiu, 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), 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 Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), 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), Sivaramakrishnan Muralithar, 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 de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université 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 Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Condensed matter physics, Island of inversion, Chemistry, Magic (programming), Nuclear structure, Theoretical models, 020206 networking & telecommunications, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 23.35.+g, 23.40.-s, 23.20.Lv, 25.70.Mn, 27.30.+t, 27.40.+z, 29.30.Kv, 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, Atomic physics, Ground state, Spectroscopy
Abstract

Expérience GANIL/LISE3/EXOGAM; International audience; It is well known that the nuclear shell structure changes for the most exotic nuclei. One of the consequences ofthis phenomenon is the modification of the "classical" magic numbers, as experimentally observed at N = 20 and N = 28.Nevertheless, the mechanisms responsible for such changes are still under discussion and more experimental information isneeded to better constrain the theoretical models. In these proceedings, we report on the discovery and the experimental studyby precise spectroscopy experiments of the 0+2 state in 34Si and 44S. The 34Si is located between the magic spherical 36S andthe deformed 32Mg, member of the so-called island of inversion, whereas 44S is located between the magic spherical 48Caand the deformed 42Si. Therefore, the structure of these nuclei, and in particular the phenomenon of shape coexistence, isof crucial importance to understand how the intruder configurations progressively dominate the ground state structure of themost exotic nuclei at both N = 20 and N = 28.

Published
2012
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10. $^{12}$C+$^{16}$O sub-barrier radiative capture cross-section measurements

Author

G. Ruprecht, S. Courtin, C. Ruiz, D. A. Hutcheon, A. Goasduff, D. Lebhertz, C. Beck, C. A. Davis, Jennifer Fallis, U. Hager, P.-A. Amandruz, F. Haas, D. G. Jenkins, D. Ottewell, 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), 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, QC1-999, Radiative capture, Order (ring theory), Coulomb barrier, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Ion, Cross section (physics), Phase space, Heavy ion, Atomic physics, Nuclear Experiment (nucl-ex), Nuclear Experiment, ComputingMilieux_MISCELLANEOUS
Abstract

We have performed a heavy ion radiative capture reaction between two light heavy ions, $^{12}$C and $^{16}$O, leading to $^{28}$Si. The present experiment has been performed below Coulomb barrier energies in order to reduce the phase space and to try to shed light on structural effects. Obtained $\gamma$-spectra display a previously unobserved strong feeding of intermediate states around 11 MeV at these energies. This new decay branch is not fully reproduced by statistical nor semi-statistical decay scenarii and may imply structural effects. Radiative capture cross-sections are extracted from the data., Comment: 4 pages, 7 figures, to appear as proceedings of FUSION 2011 conference at St-Malo, France

Published
2011
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11. Quasi-elastic reactions : an interplay of reaction dynamics and nuclear structure

Author

S. Courtin, A. Gadea, S. Szilner, E. Farnea, J. J. Valiente-Dobón, D. Lebhertz, D. Jelavić-Malenica, N Soić, S. Beghini, F. Haas, G. Pollarolo, A. M. Stefanini, C. A. Ur, S. Lunardi, Fernando Scarlassara, Tea Mijatović, L. Corradi, D. Mengoni, E. Fioretto, and G. Montagnoli

Subjects
Coupling, History, education.field_of_study, binary reactions, large solid angle magnetic spectrometer, reaction dynamics, nuclear structure, Chemistry, Population, Solid angle, Degrees of freedom (physics and chemistry), Nuclear structure, Coincidence, Computer Science Applications, Education, Reaction dynamics, Excited state, Atomic physics, education
Abstract

The revival of transfer reaction studies benefited from the construction of the new generation large solid angle spectrometers based on the trajectory reconstruction that reached an unprecedented efficiency and selectivity. The coupling of these spectrometers with large gamma arrays allowed the identification of individual excited states, their population pattern and decay modes via particle- gamma coincidences. In the present paper aspects of fragment-gamma coincidence studies measured with the Prisma-Clara set up in 40Ca+96Zr and 40Ar+208Pb are discussed. In particular, we report about states of particle-phonon character, supporting the idea that the relevant degrees of freedom acting in the reaction dynamics define the final yield distributions.

Published
2011

12. Nuclear reaction measurements of 95MeV/u 12C interactions on PMMA for hadrontherapy

Author

Louise Stuttge, J.M. Fontbonne, G. Ban, M. Rousseau, F. Le Foulher, Cédric Ray, Arnaud Guertin, M. D. Salsac, C. Pautard, D. Lebhertz, M. Labalme, M. Testa, B. Braunn, D. Cussol, F. Haas, Etienne Testa, Michel Chevallier, Denis Dauvergne, J. Colin, 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), CAS-PHABIO, 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 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), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Normandie Université (NU)-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), 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 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 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)

Subjects
Nuclear reaction, Nuclear and High Energy Physics, Materials science, Isotope, 010308 nuclear & particles physics, Cyclotron, Carbon-12, Bragg peak, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Charged particle, 030218 nuclear medicine & medical imaging, Ion, law.invention, 03 medical and health sciences, 0302 clinical medicine, law, Hadrontherapy, 0103 physical sciences, [PHYS.PHYS.PHYS-MED-PH]Physics [physics]/Physics [physics]/Medical Physics [physics.med-ph], Atomic physics, Instrumentation, Beam (structure), 12C fragmentation
Abstract

Expérience GANIL; The ion dose deposition in tissues is characterized by a favorable depth dose profile (i.e. Bragg peak) and a small lateral spread. In order to keep these benefits of ions in cancer treatments, a very high accuracy is required on the dose deposition (±3%). For given target stoechiometry and geometry, the largest uncertainty on the physical dose deposition is due to the ion nuclear fragmentation. We have performed an experiment at GANIL with a 95MeV/u 12C beam on thick tissue equivalent PMMA targets (thicknesses: 5, 10, 15, 20 and 25mm). The main goals of this experiment are to provide experimental fragmentation data for benchmarking the physical models used for treatment planning. Production rates, energy and angular distributions of charged fragments have been measured. The purpose of this paper is to present the results of this experiment.

Published
2011
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13. Interplay between single-particle and collective excitations in argon isotopes populated by transfer reactions

Author

M. Bouhelal, Neven Soić, R. Chapman, D. Lebhertz, S. Lunardi, A. Gadea, C. A. Ur, D. Mengoni, A. M. Stefanini, M. D. Salsac, E. Caurier, R. Silvestri, D. Jelavić-Malenica, J. J. Valiente-Dobón, E. Farnea, F. Haas, G. Pollarolo, F. Nowacki, P. Mason, S. Courtin, E. Sahin, G. Montagnoli, F. Recchia, L. Angus, Suzana Szilner, S. Beghini, Alain Goasduff, N. Marginean, J. F. Smith, F. Scarlassara, E. Fioretto, V. Kumar, L. Corradi, Rudjer Boskovic Institute [Zagreb], INFN Laboratori Nazionali di Legnaro, 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), Istituto Nazionale di Fisica Nucleare, Sezione di Torino (INFN, Sezione di Torino), Istituto Nazionale di Fisica Nucleare (INFN), University of the West of Scotland (UWS), Istituto Nazionale di Fisica Nucleare, Sezione di Padova (INFN, Sezione di Padova), 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, 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, Nuclear reaction, Nuclear and High Energy Physics, Isotope, 010308 nuclear & particles physics, Degrees of freedom (physics and chemistry), Isotopes of argon, heavy ion transefr reactions, argon isotopes, nuclear structure, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Electromagnetic radiation, Coupling (physics), 0103 physical sciences, Quasiparticle, Atomic physics, Nuclear Experiment, 010306 general physics, Excitation
Abstract

International audience; New γ transitions have been identified in argon isotopes in 40 Ar + 208 Pb multiple transfer reactions by exploiting, in a fragment-γ measurement, the new generation of magnetic spectrometers based on trajectory reconstruction coupled to large γ arrays. The coupling of single-particle degrees of freedom to nuclear vibration quanta was discussed. The interpretation of the newly observed states within a particle-phonon coupling picture was used to consistently follow, via their excitation energies, the evolution of collectivity in odd Ar isotopes. The proposed level schemes are supported by the results of sd-pf shell-model calculations, which have been also employed to evaluate the strength functions of the populated states.

Published
2011
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14. Probing the 12C-12C and 12C-16O molecular states by radiative capture: present status and future

Author

M. D. Salsac, D. Lebhertz, D. G. Jenkins, S. Courtin, D. A. Hutcheon, M. Labiche, M. Ciemala, O. Stezowski, A. Goasduff, F. Haas, Oliver J. Roberts, A. Michalon, 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 Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire 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), 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 de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université 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, Nuclear and High Energy Physics, Spectrometer, 010308 nuclear & particles physics, Radiative capture, General Physics and Astronomy, Coulomb barrier, Scintillator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Cross section (physics), 0103 physical sciences, Cluster (physics), 010306 general physics, ComputingMilieux_MISCELLANEOUS, Spin-½
Abstract

Complete γ-decay in the 12 C (12 C ,γ)24 Mg and 12 C (16 O ,γ)28 Si reactions has been measured at energies close to the Coulomb Barrier using the DRAGON spectrometer and its associated BGO γ-array at the TRIUMF facility. The experimental data show an important feeding of doorway states around 10-11 MeV in both reactions. Comparisons with simulations allow to extract the full capture cross section and the main spin involved in the process. Different models are confronted to the results : completely statistical, semi-statistical with an unique entrance spin and cluster. The resolution of the BGO enables to eliminate a fully statistical scenario but is not enough to disentangle the two remaining scenarii. It is shown that the future PARIS array composed of the recently developed LaBr 3 scintillators will have capabilities to distinguish between these two scenarii.

Published
2010
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15. Sub-barrier fusion hindrance in medium-light systems

Author

P. Mason, R. Silvestri, L. Corradi, E. Fioretto, B. Guiot, Suzana Szilner, F. Haas, Am Stefanini, G. Montagnoli, S. Courtin, D. Lebhertz, and Fernando Scarlassara

Subjects
Physics, Isotopes of calcium, Nuclear reaction, Nuclear and High Energy Physics, Light nucleus, Fusion, Nucleosynthesis, Stable isotope ratio, Q value, fusion excitation function, sub-barrier cross section, medium-light systems, Atomic physics, Excitation
Abstract

The fusion excitation functions of 48 Ca + 48 Ca and 36 S + 64 Ni have been measured down to very low energies, where the phenomenon known as fusion “hindrance” should show up, extending previous measurements which were limited to rather large near-barrier cross sections. Both systems show a steady decrease of the sub-barrier fusion cross sections with no pronounced change of slope. The logarithmic slopes of the two fusion excitation functions have a steep rise in the barrier region with decreasing energy and then level off in both cases. A close analogy with the case of 36 S + 48 Ca, a system with a positive Q-value for fusion ( Q f u s ), that was measured recently, is pointed out.

Published
2010
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16. How does fusion hindrance show up in medium-light systems? The case of 48Ca + 48Ca

Author

P. Mason, Suzana Szilner, B. Guiot, G. Montagnoli, D. Lebhertz, F. Haas, Fernando Scarlassara, A. M. Stefanini, S. Courtin, E. Fioretto, L. Corradi, R. Silvestri, Istituto Nazionale di Fisica Nucleare, Sezione di Padova (INFN, Sezione di Padova), Istituto Nazionale di Fisica Nucleare (INFN), 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), and National Institute for Nuclear Physics (INFN)

Subjects
Physics, Excitation function, Range (particle radiation), Fusion, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Heavy-ion fusion, Coulomb barrier, Coupled-channels model, 25.70.Jj, 24.10.Eq, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Cross section (geometry), Sub-barrier cross sections, medicine.anatomical_structure, 0103 physical sciences, medicine, sub-barrier cross sections, coupled-channels model, Woods–Saxon potential, Atomic physics, 010306 general physics, Nucleus, Sign (mathematics)
Abstract

The fusion excitation function of 48 Ca + 48 Ca has been measured above and well below the Coulomb barrier, thereby largely extending the energy range of a previous experiment down to very low cross sections. This system has a negative Q -value for compound nucleus formation. The fusion cross section decreases steadily below the barrier with no conspicuous change of slope below ≃ 300 μb . Coupled-channels calculations using a Woods–Saxon potential indicate that a large diffuseness parameter is needed to reproduce the sub-barrier cross sections. A close analogy with the case of 36 S + 48 Ca, with Q > 0 , is pointed out. The sign of the Q -value does not influence fusion cross sections down to the 300–600 nb level.

Published
2009
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17. HEAVY ION RADIATIVE CAPTURE OF $^{12}$C +$^{12}$C

Author

D. Seweryniak, Alexander Robinson, A. H. Wuosmaa, S. Zhu, D. Lebhertz, S. Courtin, N. S. Pattabiraman, M. P. Carpenter, J. C. Lighthall, D. G. Jenkins, C. J. Lister, F. Haas, David O'Donnell, R. Wadsworth, P. Marley, Département Recherches Subatomiques (DRS-IPHC), and 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)

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Radiative capture, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Preliminary analysis, Nuclear physics, 0103 physical sciences, Heavy ion, Atomic physics, 010306 general physics, Triple ion
Abstract

Resonances in light heavy ion reactions are a much studied but little understood phenomenon. New measurements are reported of the 12 C (12 C ,γ)24 Mg radiative capture reaction with the aim of performing spectroscopic measurements on the previously identified resonances. The preliminary analysis is outlined relating to the identification of the 24 Mg using a triple ion chamber setup.

Published
2008
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18. Alpha-Cluster States Populated in 24Mg+12C

Author

C. BECK, A. SÀNCHEZ I ZAFRA, P. PAPKA, S. THUMMERER, F. AZAIEZ, P. BEDNARCZYK, S. COURTIN, D. CURIEN, O. DORVAUX, D. LEBHERTZ, A. NOURREDDINE, J. ROBIN, M. ROUSSEAU, W. VON OERTZEN, B. GEBAUER, TZ. KOKALOVA, C. WHELDON, G. DE ANGELIS, A. GADEA, S. LENZI, S. SZILNER, D. R NAPOLI, W. N. CATFORD, D. G. JENKINS, G. ROYER, 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), Laboratoire SUBATECH Nantes (SUBATECH), and 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)

Subjects
Physics, Nuclear and High Energy Physics, Spectrometer, 010308 nuclear & particles physics, General Physics and Astronomy, Binary number, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Coincidence, Charged particle, Nuclear physics, Coincident, 0103 physical sciences, Cluster (physics), Nuclear Experiment (nucl-ex), 010306 general physics, Spin (physics), alpha clusters, deformation, resonance structures, Nuclear Experiment, Excitation
Abstract

Charged particle and gamma decays in light alpha-like nuclei are investigated for 24Mg+12C. Various theoretical predictions for the occurence of superdeformed and hyperdeformed bands associated with resonance structures with low spin are presented. The inverse kinematics reaction 24Mg+12C is studied at Elab(24Mg) = 130 MeV. Exclusive data were collected with the Binary Reaction Spectrometer in coincidence with EUROBALL IV installed at the VIVITRON Tandem facility at Strasbourg. Specific structures with large deformation were selectively populated in binary reactions and their associated gamma decays studied. Coincident events from $\alpha$-transfer channels were selected by choosing the excitation energy or the entry point via the two-body Q-values. The analysis of the binary reaction channels is presented with a particular emphasis on 20Ne-gamma and 16O-gamma coincidences., Comment: 8 pages, 4 figures, paper presented at the First Workshop on State Of The Art in Nuclear Cluster Physics (SOTANCP2008) 13-16 May, 2008, Strasbourg, France and accepted by International Journal of Modern Physics E (world Scientific), Proceedinggs of the Conference (to be publihed)

Published
2008
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19. RESONANT RADIATIVE CAPTURE AND MOLECULAR STATES IN $^{24}$Mg AND $^{28}$Si

Author

D. G. Jenkins, F. Haas, S. Courtin, M. D. Salsac, R. Glover, M. Rousseau, P. E. Kent, C. Beck, P. L. Marley, J. Pearson, D. A. Hutcheon, C. Davis, D. Lebhertz, A. Michalon, Département Recherches Subatomiques (DRS-IPHC), and 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)

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Spectrometer, 010308 nuclear & particles physics, 0103 physical sciences, Radiative capture, General Physics and Astronomy, Coulomb barrier, Atomic physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 010306 general physics, 01 natural sciences
Abstract

The radiative capture process of the 12 C +12 C and 12 C +16 O reactions has been studied using the very selective 0° Dragon spectrometer at Triumf and its associated BGO γ-array. The experiments have been performed at energies around the Coulomb barrier where resonances in the process have been reported. Our results show previously unobserved γ-decay to doorway states in the 24 Mg and 28 Si respectively around 10 to 12 MeV. The nature of the states is discussed and two scenarii are proposed.

Published
2008
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20. Decay of a narrow and high spin 24Mg+24Mg resonance

Author

Alejandro Algora, B. R. Behera, E. Sahin, F. Della Vedova, G. Montagnoli, A. Latina, M. Rousseau, S. Courtin, Kenia Teodoro Wiedemann, S. Beghini, E. Fioretto, C. Beck, A. M. Stefanini, P. Papka, F. Haas, G. Pollarolo, D. G. Jenkins, I. Pokrovski, Dóra Sohler, Zsolt Dombrádi, D. Lebhertz, N. Marginean, Z. M. Wang, D. R. Napoli, R. Chapman, E. Farnea, X. Liang, M.-D. Salsac, A. Gadea, C. A. Ur, M. Trotta, S. M. Lenzi, A. Sanchez I Zafra, Fernando Scarlassara, Suzana Szilner, L. Corradi, Département Recherches Subatomiques (DRS-IPHC), and 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)

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, deduced ON/OFF resonance yield ratios for the inelastic and fusion–evaporation channels, Spectrometer, Tandem, 010308 nuclear & particles physics, Resonance, 25.70.Ef, 25.70.Bc, 25.70.Jj, 21.60.Gx, 21.60.Ev, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, measured (fragment)γ- (charged particle)γ- γγ-coin, Nuclear reactions 24Mg(24Mg X) E=91.4 MeV, ON resonance formation of 48Cr discussed, Off resonance, 0103 physical sciences, Atomic physics, resonat effects, 24Mg+24Mg, high spin resonance, PRISMA, CLARA, GASP, fusion-evaporation, Nuclear Experiment, 010306 general physics, Spin (physics)
Abstract

The ^{24}Mg + ^{24}Mg reaction has been studied at the Legnaro Tandem at a CM bombarding energy of 45.7 MeV where a narrow and high spin resonance has been reported previously. The decay of the resonance into the inelastic and fusion–evaporation channels has been investigated. The ON and OFF resonance decay yields have been measured using, for the inelastic channels, the fragment spectrometer PRISMA and the γ array CLARA, and, for the fusion–evaporation channels, the Si array EUCLIDES and the γ array GASP. Strong resonant effects have been observed in the inelastic channels involving the 2_1^+ and 4_1^+ states of the ^{24}Mg ground state band. Weaker effects are also seen in certain fusion–evaporation channels. The properties of the studied resonance are in agreement with molecular model predictions. It is also proposed that the narrow and high spin ^{24}Mg + ^{24}Mg resonance corresponds to the formation of a fast rotating and highly prolate deformed ^{48}Cr after a Jacobi shape transition and just before fission.

Published
2008
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21. Influence of neutron enrichment on compound system formation and decay in 78Kr+40Ca and 86Kr+48Ca reactions at 10 AMeV

Author

Pirrone S., Politi G., Lacommara M., Wieleczko J. P., Ademard G., De Filippo E., Vigilante M., Amorini F., Auditore L., Beck C., Berceanu I., Bonnet E., Borderie B., Cardella G., Chbihi A., Colonna M., Frankland J. D., Geraci E., Henry E., La Guidara E., Lanzalone G., Lautesse P., Lebhertz D., Le Neindre N., Lombardo I., Loria D., Mazurek K., Pagano A., Papa M., Piasecki E., Porto F., Quinlann M., Rizzo F., Rosato E., Russotto P., Schroeder W. U., Spadaccini G., Trifirò A., Toke J., Trimarchi M., Verde G., D'ONOFRIO, Antonio, S.Kumar and A.K.Jain, S., Pirrone, G., Politi, LA COMMARA, Marco, J. P., Wieleczko, G., Ademard, E., De Filippo, Vigilante, Mariano, F., Amorini, L., Auditore, C., Beck, I., Berceanu, E., Bonnet, B., Borderie, G., Cardella, A., Chbihi, M., Colonna, A., D’Onofrio, J. D., Frankland, E., Geraci, E., Henry, E., La Guidara, G., Lanzalone, P., Lautesse, D., Lebhertz, N., Leneindre, Lombardo, Ivano, D., Loria, K., Mazurek, A., Pagano, M., Papa, E., Piasecki, F., Porto, M., Quinlannl, F., Rizzo, Rosato, Elio, P., Russotto, W. U., Schroeder, Spadaccini, Giulio, A., Trifirò, J., Tõke, M., Trimarchi, G., Verde, 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), 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), Institut de Physique Nucléaire de Lyon (IPNL), 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), 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), 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), 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 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)-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)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Pirrone, S., Politi, G., Lacommara, M., Wieleczko, J. P., Ademard, G., De Filippo, E., Vigilante, M., Amorini, F., Auditore, L., Beck, C., Berceanu, I., Bonnet, E., Borderie, B., Cardella, G., Chbihi, A., Colonna, M., D'Onofrio, Antonio, Frankland, J. D., Geraci, E., Henry, E., La Guidara, E., Lanzalone, G., Lautesse, P., Lebhertz, D., Le Neindre, N., Lombardo, I., Loria, D., Mazurek, K., Pagano, A., Papa, M., Piasecki, E., Porto, F., Quinlann, M., Rizzo, F., Rosato, E., Russotto, P., Schroeder, W. U., Spadaccini, G., Trifirò, A., Toke, J., Trimarchi, M., and Verde, G.

Subjects
nuclear reactions fusion reactions nuclear fission, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, Low and Intermediate energy heavy-ion reactions
Abstract

The de-excitation of medium mass nuclei 118,134Ba produced in fusion process of 78,86Kr on 40,48Ca targets at 10 AMeV is studied, in order to investigate the isospin dependence of the decay modes; the neutron enrichment of the compound nuclei is in fact expected to play an important role on the emission mechanisms, providing crucial information on fundamental nuclear quantities such as level density, fission barrier, viscosity and symmetry energy. The experiment was performed at INFN-LNS with the 4π multidetector for charged particles CHIMERA, used for the first time in this low energy regime, thanks to a suitable Pulse Shape Discrimination method for charge identification applied to the silicon detectors. Preliminary results show a different isotopic composition and relative enrichment for the same Z in the two systems. The yields of the Intermediate Mass Fragments (IMF, 3

Published
2013
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22. Development of a three-dimensional scintillation detector for pencil beam verification in proton therapy patient-specific quality assurance.

Author

Frelin AM, Daviau G, Bui MHH, Fontbonne C, Fontbonne JM, Lebhertz D, Mainguy E, Moignier C, Thariat J, and Vela A

Abstract

Background: Pencil Beam Scanning proton therapy has many advantages from a therapeutic point of view, but raises technical constraints in terms of treatment verification. The treatment relies on a large number of planned pencil beams (PB) (up to thousands), whose delivery is divided in several low-intensity pulses delivered a high frequency (1 kHz in this study)., Purpose: The purpose of this study was to develop a three-dimensional quality assurance system allowing to verify all the PBs' characteristics (position, energy, intensity in terms of delivered monitor unit-MU) of patient treatment plans on a pulse-by-pulse or a PB-by-PB basis., Methods: A system named SCICOPRO has been developed. It is based on a 10 × 10 × 10 cm 3 scintillator cube and a fast camera, synchronized with beam delivery, recording two views (direct and using a mirror) of the scintillation distribution generated by the pulses. A specific calibration and analysis process allowed to extract the characteristics of all the pulses delivered during the treatment, and consequently of all the PBs. The system uncertainties, defined here as average value + standard deviation, were characterized with a customized irradiation plan at different PB intensities (0.02, 0.1, and 1 MU) and with two patient's treatment plans of three beams each. The system's ability to detect potential treatment delivery problems, such as positioning errors of the treatment table in this work (1° rotations and a 2 mm translation), was assessed by calculating the confidence intervals (CI) for the different characteristics and evaluating the proportion of PBs within these intervals., Results: The performances of SCICOPRO were evaluated on a pulse-by-pulse basis. They showed a very good signal-to-noise ratio for all the pulse intensities (between 2 × 10 -3  MU and 150 × 10 -3  MU) allowing uncertainties smaller than 580 µm for the position, 180 keV for the energy and 3% for the intensity on patients treatment plans. The position and energy uncertainties were found to be little dependent from the pulse intensities whereas the intensity uncertainty depends on the pulses number and intensity distribution. Finally, treatment plans evaluations showed that 98% of the PBs were within the CIs with a nominal positioning against 83% or less with the table positioning errors, thus proving the ability of SCICOPRO to detect this kind of errors., Conclusion: The high acquisition rate and the very high sensitivity of the system developed in this work allowed to record pulses of intensities as low as 2 × 10 -3  MU. SCICOPRO was thus able to measure all the characteristics of the spots of a treatment (position, energy, intensity) in a single measurement, making it possible to verify their compliance with the treatment plan. SCICOPRO thus proved to be a fast and accurate tool that would be useful for patient-specific quality assurance (PSQA) on a pulse-by-pulse or PB-by-PB verification basis., (© 2024 The Author(s). Medical Physics published by Wiley Periodicals LLC on behalf of American Association of Physicists in Medicine.)

Published
2024
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23. Unveiling the intruder deformed 02(+) state in 34Si.

Author

Rotaru F, Negoita F, Grévy S, Mrazek J, Lukyanov S, Nowacki F, Poves A, Sorlin O, Borcea C, Borcea R, Buta A, Cáceres L, Calinescu S, Chevrier R, Dombrádi Z, Daugas JM, Lebhertz D, Penionzhkevich Y, Petrone C, Sohler D, Stanoiu M, and Thomas JC

Abstract

The 02(+) state in 34Si has been populated at the GANIL-LISE3 facility through the β decay of a newly discovered 1(+) isomer in 34Al of 26(1) ms half-life. The simultaneous detection of e(+)e(-) pairs allowed the determination of the excitation energy E(02(+))=2719(3)  keV and the half-life T(1/2)=19.4(7) ns, from which an electric monopole strength of ρ(2)(E0)=13.0(0.9)×10(-3) was deduced. The 2(1)(+) state is observed to decay both to the 0(1)(+) ground state and to the newly observed 0(2)(+) state [via a 607(2) keV transition] with a ratio R(2(1)(+)→0(1)(+)/2(1)(+)→0(2)(+))=1380(717). Gathering all information, a weak mixing with the 0(1)(+) and a large deformation parameter of β=0.29(4) are found for the 0(2)(+) state, in good agreement with shell model calculations using a new SDPF-U-MIX interaction allowing np-nh excitations across the N=20 shell gap.

Published
2012
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