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

Author

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, QC1-999
Abstract

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

Author

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., Trifirò A., Toke J., and Verde G.

Subjects
Physics, QC1-999
Abstract

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

Published
2016
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3. Alpha-particle clustering in excited expanding self-conjugate nuclei

Author

Borderie B., Raduta Ad. R., Ademard G., Rivet M. F., De Filippo E., Geraci E., Le Neindre N., Cardella G., Lanzalone G., Lombardo I., Lopez O., Maiolino C., Pagano A., Pirrone S., Politi G., Rizzo F., and Russotto P.

Subjects
Physics, QC1-999
Abstract

The fragmentation of quasi-projectiles from the nuclear reaction 40Ca+12C at 25 MeV/nucleon was used to produce α-emission sources. From a careful selection of these sources provided by a complete detection and from comparisons with models of sequential and simultaneous decays, strong indications in favour of α-particle clustering in excited 16O, 20Ne and 24Mg are reported.

Published
2016
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4. FAZIA applications

Author

Piantelli S., Casini G., Maurenzig P.R., Olmi A., Barlini S., Bini M., Pasquali G., Pastore G., Poggi G., Stefanini A.A., Valdrè S., Ademard G., Auger L., Bougault R., Bonnet E., Borderie B., Chbihi A., Frankland J.D., Gruyer D., Lopez O., LeNeindre N., Parlog M., Rivet M.F., Vient E., Rosato E., Spadaccini G., Vigilante M., Bruno M., Marchi T., Morelli L., Cinausero M., Degerlier M., Gramegna F., Kordyasz A., Kozik T., Twarog T., Alba R., Maiolino C., Santonocito D., and Galichet E.

Subjects
Physics, QC1-999
Abstract

The present status and the perspectives of the FAZIA project are presented. The main achievements in terms of identification thresholds and isotopic resolution are discussed, together with the adopted technical solutions. The detector is particularly well suited for the investigation of isospin transport phenomena at intermediate beam energies; perspectives to reduce the identification thresholds to cope with lower energy ISOL beams are briefly introduced. Some experimental results concerning isospin transport effects obtained with a test telescope are presented. The study of isospin transport phenomena can give information on the symmetry energy term of the nuclear equation of state by comparing the experimental results on isospin related observables with the predictions of transport codes.

Published
2016
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5. N/Z influence on the level density parameter

Author

Ademard G., Augey L., Borderie B., Le Neindre N., Marini P., Rivet M.-F., and Twarog T.

Subjects
Physics, QC1-999
Abstract

A completely exclusive experiment was performed by the INDRA collaboration to study the isospin dependence of the level density parameter. Over a large N/Z range, the fusion-evaporation charged products of 34,36,40Ar+58,60,64Ni reactions were measured and identified both in charge and mass by coupling INDRA and VAMOS spectrometer. Preliminary results obtained by combining data of both detectors are presented for the 36Ar+58Ni at 13.3 A MeV. The analysis method of relevant observables for such an ambitious investigation are discussed and the progress of the data analysis are reviewed.

Published
2015
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6. Extracting information from partially depleted Si detectors with digital sampling electronics

Author

Pastore G., Pasquali G., Le Neindre N., Ademard G., Barlini S., Bini M., Bonnet E., Borderie B., Bougault R., Casini G., Chbihi A., Cinausero M., Dueñas J.A., Edelbruck P., Frankland J.D., Gramegna F., Gruyer D., Kordyasz A., Kozik T., Lopez O., Marchi T., Morelli L., Olmi A., Ordine A., Pârlog M., Piantelli S., Poggi G., Rivet M.-F., Rosato E., Salomon F., Spadaccini G., Stefanini A.A., Valdré S., Vient E., Twaróg T., Alba R., Maiolino C., and Santonocito D.

Subjects
Physics, QC1-999
Abstract

A study of the identification properties and of the energy response of a Si-Si-CsI(Tl) ΔE-E telescope exploiting a partially depleted second Si stage has been performed. Five different bias voltages have been applied to the second stage of the telescope, one corresponding to full depletion, the others associated with a depleted layer ranging from 60% to 90% of the detector thickness. Fragment identification has been obtained using either the ΔE-E technique or the Pulse Shape Analysis (PSA). Charge collection efficiency has been evaluated. The ΔE-E performance is not affected by incomplete depletion. Isotopic separation capability improves at lower bias voltages with respect to full depletion, though charge identification thresholds increase.

Published
2015
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7. Recent results from INDRA

Author

Chbihi A., Frankland J.D., Lopez O., Boisjoli M., Bonnet E., Gruyer D., Marini P., Ademard G., Rivet M.-F., Verde G., Bougault R., Borderie B., Galichet E., La Commara M., Le Neindre N., Legouée E., Lombardo I., Manduci L., Pârlog M., Rosato E., Roy R., Spadaccini G., Vient E., Vigilante M., and Wieleczko J.P.

Subjects
Physics, QC1-999
Abstract

Recent results of the INDRA collaboration are presented in this contribution. They concern the evolution of reaction dynamics from the first stage of the collision to the production of fragments. Different probes are used to evidence the stopping/transparency, collective flow and the symmetry energy term of the nuclear equation of state.

Published
2015
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8. Decay competition for IMF produced in the collisions 78Kr+40Ca and 86Kr+48Ca at 10 A·MeV

Author

La Commara M., Pirrone S., Politi G., 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., Rivet M.F., Rizzo F., Rosato E., Russotto P., Schroeder W.U., Spadaccini G., Trifirò A., Toke J., Trimarchi M., and Verde G.

Subjects
Physics, QC1-999
Abstract

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
2014
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9. Decay modes of the systems formed in the reactions 78Kr+40Ca and 86Kr+48Ca

Author

Colonna M., Chbihi A., Cardella G., Borderie B., Bonnet E., Berceanu I., Beck C., Auditore L., Amorini F., Vigilante M., De Filippo E., Ademard G., Wieleczko J.P., Politi G., Pirrone S., La Commara 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., Loria D., Mazurek K., Pagano A., Papa M., Piasecki E., Porto F., Quinlannl M., Rizzo F., Rosato E., Russotto P., Schroeder W. U., Spadaccini G., Trifirò A., Tõke J., Trimarchi M., and Verde G.

Subjects
Physics, QC1-999
Abstract

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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10. Study and comparison of the decay modes of the systems formed in the reactions 78Kr+40Ca and 86Kr+48Ca at 10 AMeV

Author

Verde G., Trifirò A., Schroeder W.U., Spadaccini G., Russotto P., Rosato E., Rizzo F., Quinlann M., Porto F., Piasecki E., Papa M., Pagano A., Mazurek K., Loria D., Lombardo I., LeNeindre N., Lebhertz D., Lautesse P., Lanzalone G., LaGuidara E., Henry E., Geraci E., Frankland J.D., D'Onofrio A., Colonna M., Chbihi A., Cardella G., Borderie B., Bonnet E., Berceanu I., Beck C., Auditore L., Amorini F., Vigilante M., Filippo E. De, Ademard G., Wieleczko J.P., Commara M. La, Pirrone S., and Politi G.

Subjects
Physics, QC1-999
Abstract

The first results of the ISODEC experiment, performed at the INFN Laboratori Nazionali del Sud (LNS) by using the CHIMERA detector, are presented. The principal aim of this experiment is to explore the isospin dependence of the decay modes of medium mass compound nuclei formed by fusion processes, by studying the competition between the various disintegration modes of 118,134Ba nuclei produced in the reactions 78Kr+40Ca and 86Kr+48Ca at 10 AMeV. The studied systems allow in fact to produce compound nuclei with a large variation of N/Z, and such data will also provide new constraint on sophisticated models attempting to describe statistical and/or dynamical properties of excited nuclei. The experiment complements data already obtained at 5.5 AMeV for 78,82Kr+40Ca reactions, previously realized at GANIL by using the INDRA detector. First results show a strong staggering effects in the Z distributions, as well as different isotopic composition and enrichment for the reaction products in the two systems.

Published
2012
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11. Asymmetric Fission in the 78Kr+40Ca reactions at 5.5 MeV/nucleon

Author

Roy R., Pierroutsakou D., Romoli M., D’Onofrio A., Parlog M., Neindre N. Le, Lautesse P., Kravchuk V.L., Sanctis J. De, De Angelis G., Bougault R., Dayras R., Barlini S., Borderie B., Beck C., Spadaccini G., Rosato E., Vigilante M., Commara M. La, del Campo J. Gomez, Chbihi A., Frankland J.D., Bonnet E., Schmitt C., Mazurek K., Wieleczko J.P., and Ademard G.

Subjects
Physics, QC1-999
Abstract

The cross section, kinetic energy distribution and angular distribution of fragments with atomic number 3 ≤ Z ≤ 28 emitted in the reaction 78Kr + 40Ca at the bombarding energy of 5.5 MeV/nucleon and coincidence between light charged particles and fragments were measured by means of the 4π-INDRA array to study the decay mechanism of medium mass excited nucleus. Global features indicate a high degree of relaxation and are compatible with a binary fission from compound nucleus. The mean value of the kinetic energy distributions of fragments indicates dominance of Coulomb interaction, while the width of the distribution signals large fluctuations. Inclusive cross-section distributions of fragments with charge 3 ≤ Z ≤ 28 are bell-shaped and a strong even-odd-staggering (o-es) is observed for 3 ≤ Z ≤ 12. Coincidence measurements suggest that the light partners in very asymmetric fission are emitted at excitation energies below the particle emission thresholds. Data were confronted to the predictions of statistical model describing the decay of compound nuclei by emission of light particles and fragments. Calculations assuming spherical fission fragments and finite-range liquid drop fission barriers are not able to explain the experimental features. Attempts have been made to improve the agreement with experimental data. The analysis indicates the strong influence of the shape parameterization of the potential energy surface in describing the fission process of intermediate mass compound nuclei.

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

Author

Piasecki E., Papa M., Pagano A., Mazurek K., Loria D., Lombardo I., Le Neindre N., Lebhertz D., Lautesse P., Lanzalone G., La Guidara E., Henry E., Geraci E., Frankland J.D., D’Onofrio A., Colonna M., Chbihi A., Cardella G., Borderie B., Bonnet E., Berceanu I., Beck C., Auditore L., Amorini F., Vigilante M., De Filippo E., Ademard G., Wieleczko J.P., La Commara M., Politi G., Pirrone S., 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
Physics, QC1-999
Abstract

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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13. Decay of excited nuclei produced in the 78,82Kr+40Ca reactions at 5.5 MeV/nucleon

Author

Le Neindre N., Lautesse P., Kravchuk V.L., De Sanctis J., De Angelis G., Dayras R., Bougault R., Barlini S., Borderie B., Beck C., Kalandarov Sh.A., Rosato E., Spadaccini G., Frankland J.D., Chbihi A., Vigilante M., Bonnet E., LaCommara M., del Campo J. Gomez, Wieleczko J.P., Ademard G., Moisan J., D’Onofrio A., Parlog M., Pierroutsakou D., Romoli M., Roy R., Adamian G.G., and Antonenko N.V.

Subjects
Physics, QC1-999
Abstract

Decay modes of excited nuclei are studied in 78,82Kr + 40Ca reactions at 5.5 MeV/nucleon by means of light-charged particles measured in coincidence with intermediate mass fragments and fission-like fragments. Inclusive cross-section distributions of fragments with charge 3 ≤ Z ≤ 28 are bell-shaped and a strong oddeven-staggering (o-e-s) is observed for 3 ≤ Z ≤ 12. Coincidence measurements suggest that the light partners in very asymmetric fission are emitted at excitation energies below the particle emission thresholds. Data were confronted to the predictions of statistical models describing the decay of compound nuclei by emission of light particles and fragments. Comparison with models suggests that the o-e-s of the light-fragment yields is mainly due to the successive steps of compound nucleus disintegration.

Published
2011
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14. Influence Of The Neutron Richness On Binary Decays

Author

Roy R., Shapira D., Romoli M., Rejmund F., Rivet M.F., Parlog M., Pierroutsakou D., Lautesse P., Le Neindre N., De Angelis G., Galindo-Uribarri A., Bougault R., Dayras R., Beck C., Borderie B., Spadaccini G., Gomez del Campo J., D’Onofrio A., Rosato E., Vigilante M., La Commara M., Frankland J.D., Bonnet E., Chbihi A., Ademard G., and Wieleczko J.P.

Subjects
Physics, QC1-999
Abstract

The influence of the neutron richness on binary decays is investigated in 78,82Kr+ 40Ca reactions at 5.5 MeV/A incident energy. Kinetic energy distributions and angular distributions of fragments with atomic number 6 ≤ Z ≤ 28 were measured using the 4π-INDRA array. Global features are compatible with an emission from a long-lived system. The yields around the symmetric splitting are about 30The persistence of strong structural effects is evidenced from elemental cross-sections of the light fragments. The cross-sections for odd-Z fragments are higher for the neutron rich CN while cross-sections for even-Z fragments are higher for the neutron poor CN. Calculations assuming two different potential energy surfaces are presented.

Published
2010
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15. Energy measurement and fragment identification using digital signals from partially depleted Si detectors

Author

Pasquali, G., Pastore, G., Neindre, N. Le, Ademard, G., Barlini, S., Bini, M., Bonnet, E., Borderie, B., Bougault, R., Bruno, M., Casini, G., Chbihi, A., Cinausero, M., Duenas, J. A., Edelbruck, P., Frankland, J. D., Gramegna, F., Gruyer, D., Kordyasz, A., Kozik, T., Lopez, O., Marchi, T., Morelli, L., Olmi, A., Ordine, A., Parlog, M., Piantelli, S., Poggi, G., Rivet, M. F., Rosato, E., Salomon, F., Spadaccini, G., Stefanini, A. A., Valdre, S., Vient, E., Twarog, T., Alba, R., Maiolino, C., Santonocito, D., G., Pasquali, G., Pastore, N., Le Neindre, G., Ademard, S., Barlini, M., Bini, E., Bonnet, B., Borderie, R., Bougault, M., Bruno, G., Casini, A., Chbihi, M., Cinausero, J. A., Dueña, P., Edelbruck, J. D., Frankland, F., Gramegna, D., Gruyer, A., Kordyasz, T., Kozik, O., Lopez, T., Marchi, L., Morelli, A., Olmi, A., Ordine, M., Pˆarlog, S., Piantelli, G., Poggi, M. F., Rivet, Rosato, Elio, F., Salomon, Spadaccini, Giulio, A. A., Stefanini, S., Valdrè, E., Vient, T., Twaróg, R., Alba, C., Maiolino, D., Santonocito, 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), 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), Istituto Nazionale di Fisica Nucleare, Sezione di Firenze (INFN, Sezione di Firenze), Istituto Nazionale di Fisica Nucleare (INFN), Istituto Nazionale di Fisica Nucleare, Sezione di Napoli (INFN, Sezione di Napoli), FAZIA, 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), 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, Physics - Instrumentation and Detectors, business.industry, Detector, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Particle identification, Particle detector, Semiconductor detector, psa, isotopic identification, Calibration, Optoelectronics, Figure of merit, si telescope, Wafer, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment (nucl-ex), business, Nuclear Experiment, Voltage
Abstract

A study of identification properties of a Si-Si DE-E telescope exploiting an underdepleted residual-energy detector has been performed. Five different bias voltages have been used, one corresponding to full depletion, the others associated with a depleted layer ranging from 90% to 60% of the detector thickness. Fragment identification has been performed using either the DE-E technique or Pulse Shape Analysis (PSA). Both detectors are reverse mounted: particles enter from the low field side, to enhance the PSA performance. The achieved charge and mass resolution has been quantitatively expressed using a Figure of Merit (FoM). Charge collection efficiency has been evaluated and the possibility of energy calibration corrections has been considered. We find that the DE-E performance is not affected by incomplete depletion even when only 60% of the wafer is depleted. Isotopic separation capability improves at lower bias voltages with respect to full depletion, though charge identification thresholds are higher than at full depletion. Good isotopic identification via PSA has been obtained from a partially depleted detector whose doping uniformity is not good enough for isotopic identification at full depletion., Comment: 13 pages, 10 figures 5 tables; submitted to European Physical Journal A

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16. Signals of Bose Einstein condensation and Fermi quenching in the decay of hot nuclear systems

Author

R. Bougault, M. La Commara, G. Mukherjee, J.D. Frankland, Hua Zheng, E. Galichet, P. Napolitani, Elio Rosato, B. Borderie, A. Chbihi, M.F. Rivet, Aldo Bonasera, G. Ademard, Paola Marini, Sabitra Kundu, M. Parlog, G. Spadaccini, Giuseppe Verde, C. Bhattacharya, O. Lopez, René Roy, Mariano Vigilante, P. Wigg, Diego Gruyer, Q. Fable, M. Boisjoli, L. Augey, Ivano Lombardo, 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), 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), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), INDRA 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), 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), Marini, P., Zheng, H., Boisjoli, M., Verde, G., Chbihi, A., Napolitani, P., Ademard, G., Augey, L., Bhattacharya, C., Borderie, B., Bougault, R., Frankland, J. D., Fable, Q., Galichet, E., Gruyer, D., Kundu, S., LA COMMARA, Marco, Lombardo, I., Lopez, O., Mukherjee, G., Parlog, M., Rivet, M. F., Rosato, E., Roy, R., Spadaccini, Giulio, Vigilante, Mariano, Wigg, P. C., and Bonasera, A.

Subjects
Nuclear and High Energy Physics, FOS: Physical sciences, Quantum-fluctuation method, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, law.invention, law, Quantum-fluctuations method, 0103 physical sciences, Heavy ion collisions, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Boson, Physics, Condensed Matter::Quantum Gases, 25.70.Pq, 23.60.+e, Bose–Einstein condensation, Spectrometer, Heavy ion collision, 010308 nuclear & particles physics, Bose-Einstein Condensation, Charge (physics), Fermion, lcsh:QC1-999, Coupling (physics), Atomic physics, Excitation, Bose–Einstein condensate, lcsh:Physics, Fermi Gamma-ray Space Telescope
Abstract

We report experimental signals of Bose-Einstein condensation in the decay of hot Ca projectile-like sources produced in mid-peripheral collisions at sub-Fermi energies. The experimental setup, constituted by the coupling of the INDRA 4$\pi$ detector array to the forward angle VAMOS magnetic spectrometer, allowed us to reconstruct the mass, charge and excitation energy of the decaying hot projectile-like sources. Furthermore, by means of quantum fluctuation analysis techniques, temperatures and mean volumes per particle "as seen by" bosons and fermions separately are correlated to the excitation energy of the reconstructed system. The obtained results are consistent with the production of dilute mixed (bosons/fermions) systems, where bosons experience a smaller volume as compared to the surrounding fermionic gas. Our findings recall similar phenomena observed in the study of boson condensates in atomic traps., Comment: Submitted to Phys. Rev. Lett. (december 2014)

Published
2016
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17. 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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18. Coulomb chronometry to probe the decay mechanism of hot nuclei

Author

N. Le Neindre, P. N. Nadtochy, Giuseppe Verde, I. Lombardo, Mariano Vigilante, O. Lopez, M.F. Rivet, G. Ademard, G. Spadaccini, B. Borderie, L. Manduci, Paola Marini, Diego Gruyer, M. Pârlog, J.D. Frankland, R. Bougault, E. Vient, P. Lautesse, J.P. Wieleczko, J. Gauthier, E. Rosato, René Roy, E. Legouée, D. Guinet, E. Galichet, K. Mazurek, Eric Bonnet, A. Chbihi, M. Boisjoli, 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), 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), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), Université Laval [Québec] (ULaval), 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), University of Naples Federico II = Università degli studi di Napoli Federico II, Istituto Nazionale di Fisica Nucleare, Sezione di Napoli (INFN, Sezione di Napoli), Istituto Nazionale di Fisica Nucleare (INFN), Ecole des applications militaires de l'énergie atomique (EAMEA), H.Niewodniczanski Institute of Nuclear Physics, Omsk State University, Istituto Nazionale di Fisica Nucleare, Sezione di Catania (INFN), Università degli studi di Catania = University of Catania (Unict), INDRA, 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), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-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), Università degli studi di Napoli Federico II, Università degli studi di Catania [Catania], Gruyer, Diego., Frankland, J. D., Bonnet, E., Chbihi, A., Ademard, G., Boisjoli, M., Borderie, B., Bougault, R., Galichet, E., Gauthier, J., Guinet, D., Lautesse, P., Le Neindre, N., Legouée, E., Lombardo, I., Lopez, O., Manduci, L., Marini, P., Mazurek, K., Nadtochy, P. N., Pârlog, M., Rivet, M. F., Roy, R., Rosato, E., Spadaccini, G., Verde, G., Vient, E., Vigilante, M., and Wieleczko, J. P.

Subjects
Physics, Nuclear and High Energy Physics, incomplete fusion, time scale, Binary number, FOS: Physical sciences, three-fragment correlations, low and intermediate energy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 3. Good health, Cross section (physics), 25.70.-z, 06.30.Ft, 25.70.Jj, 25.70.Pq, onset of multifragmentation, Coulomb, sequential fission, Atomic physics, Nuclear Experiment (nucl-ex), heavy-ion reactions, Nuclear Experiment, chronometer, Excitation, multifragmentation threshold, Chronometry
Abstract

In 129 Xe+ nat Sn central collisions from 8 to 25 MeV/A, the three-fragment exit channel occurs with a significant cross section. We show that these fragments arise from two successive binary splittings of a heavy composite system. The sequence of fragment production is determined. Strong Coulomb proximity effects are observed in the three-fragment final state. A comparison with Coulomb trajec-tory calculations shows that the time scale between the consecutive break-ups decreases with increasing bombarding energy, becoming quasi-simultaneous above excitation energy E * = 4.0$\pm$0.5 MeV/A. This transition from sequential to simultaneous break-up was interpreted as the signature of the onset of multifragmentation for the three-fragment exit channel in this system., Comment: 12 pages; 13 Figures; 4 Table; Accepted for publication in Physical Review C

Published
2015
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19. 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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20. Recent results from INDRA

Author

J.D. Frankland, N. Le Neindre, O. Lopez, Elio Rosato, E. Bonnet, R. Bougault, G. Spadaccini, A. Chbihi, J.P. Wieleczko, Ivano Lombardo, E. Legouée, Giuseppe Verde, M. La Commara, E. Vient, M. Boisjoli, René Roy, M.F. Rivet, G. Ademard, L. Manduci, D. Gruyer, Bernard Borderie, Mariano Vigilante, E. Galichet, Paola Marini, M. Pârlog, 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), 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), Conservatoire National des Arts et Métiers [CNAM] (CNAM), Ecole des applications militaires de l'énergie atomique (EAMEA), INDRA Collaboration, GANILEXP, 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), 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), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), Borderie, B., Chbihi, A., Frankland, Jd., Lopez, O., Boisjoli, M., Bonnet, E., Gruyer, D., Marini, P., Ademard, G., Rivet, M. -F., Verde, G., Bougault, R., Galichet, E., La Commara, M., Le Neindre, N., Legoúee, E., Lombardo, I., Manduci, L., Parlog, M., Rosato, E., Roy, R., Spadaccini, G., Vient, E., Vigilante, M., and Wieleczko, Jp.

Subjects
Physics, 010308 nuclear & particles physics, QC1-999, Nuclear equation of state, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Collision, 01 natural sciences, Symmetry (physics), Term (time), Nuclear physics, Physics and Astronomy (all), Reaction dynamics, Transparency (graphic), 0103 physical sciences, Statistical physics, 010306 general physics, Nuclear Experiment
Abstract

International audience; Recent results of the INDRA collaboration are presented in thiscontribution. They concern the evolution of reaction dynamics fromthe first stage of the collision to the production of fragments. Differentprobes are used to evidence the stopping/transparency, collective flowand the symmetry energy term of the nuclear equation of state.

Published
2014
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