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1. Investigating γ -ray decay of excited C12 levels with a multifold coincidence analysis

Author: G. Cardella, F. Favela, N. S. Martorana, L. Acosta, A. Camaiani, E. De Filippo, N. Gelli, E. Geraci, B. Gnoffo, C. Guazzoni, G. Immè, D. J. Marín-Lámbarri, G. Lanzalone, I. Lombardo, L. Lo Monaco, C. Maiolino, A. Nannini, A. Pagano, E. V. Pagano, M. Papa, S. Pirrone, G. Politi, E. Pollacco, L. Quattrocchi, F. Risitano, F. Rizzo, P. Russotto, V. L. Sicari, D. Santonocito, A. Trifirò, and M. Trimarchi
Subjects: 010308 nuclear & particles physics, 0103 physical sciences, 010306 general physics, 01 natural sciences
Published: 2021
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2. Barrier distributions of the Mg24+Zr90,92 systems: Influence of energy dissipation

Author: L. Quattrocchi, E. De Filippo, N. S. Martorana, E. V. Pagano, A. Pagano, B. Gnoffo, S. Pirrone, E. Piasecki, G. Politi, S. De Luca, Ivano Lombardo, Marina Trimarchi, C. Maiolino, A. Trzcińska, D. Dell'Aquila, G. Cardella, Antonio Trifiro, F. Rizzo, M. Kowalczyk, P. Russotto, G. Lanzalone, and Mariano Vigilante
Subjects: Physics, Distribution (mathematics), 010308 nuclear & particles physics, Projectile, 0103 physical sciences, Atomic physics, Dissipation, 010306 general physics, Coupling (probability), 01 natural sciences, Random matrix, Beam (structure)
Abstract: We present results of barrier distribution measurements for $^{24}\mathrm{Mg}+^{90,92}\mathrm{Zr}$ systems by the backscattering method. The measurements were done at near-barrier beam energies of 68--88.5 MeV (in the laboratory frame) at six angles. A strong discrepancy between experimental results and the predictions of the standard coupled channels calculations was observed. To test the hypothesis that this discrepancy may be due to partial energy dissipation caused by coupling to many target noncollective levels, we performed calculations using the coupled channels plus random matrix theory ($\mathrm{CC}+\mathrm{RMT}$) model. The comparison of calculations with experimental results gives qualitative support of the hypothesis; however, quantitatively the agreement is not as good as in the case of the $^{20}\mathrm{Ne}$ projectile.
Published: 2020
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3. On the 12C Hoyle state gamma decay

Author: E. V. Pagano, E. De Filippo, V. L. Sicari, Michele Papa, G. Cardella, S. Pirrone, F. Rizzo, N. S. Martorana, C. Maiolino, E. C. Pollacco, A. Camaiani, S. De Luca, P. Russotto, D. J. Marín-Lámbarri, C Guazzoni, A. Nannini, F. Favela, L. Acosta, Nicla Gelli, Domenico Santonocito, E. Geraci, B. Gnoffo, Lucrezia Auditore, G. Politi, Antonio Trifiro, L. Quattrocchi, G. Lanzalone, A. Pagano, M. Trimarchi, A. D. Russo, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay
Subjects: Physics, Hoyle state, History, gamma decay, sezele, 010308 nuclear & particles physics, Gamma ray, Scintillator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Measure (mathematics), Coincidence, Computer Science Applications, Education, Nuclear physics, redundant kinematics, Excited state, Rise time, 0103 physical sciences, Decay chain, 010306 general physics, Beam (structure)
Abstract: The γ-decays of 12C excited levels (the Hoyle state 0+ at 7.65 MeV and the 9.64 MeV 3) are essential for its production in the universe. We present here a new attempt to precisely measure such γ-decay probabilities. The measurement was performed at INFN-LNS in Catania using the 4π CHIMERA multidetector. In order to measure these low probability decay-channels we performed 4-fold coincidence measurements. The 12C target nuclei were excited by using a beam of 64 MeV α-particles produced by the Superconducting Cyclotron (CS) of INFN-LNS. The scattered α-particles and the 12C recoils were detected and identified by? E-E and ToF methods using CHIMERA telescopes. The two emitted γ-rays in the decay chain were detected and identified by using the second stage of the telescopes, CsI(Tl) scintillators, by means of fast-slow and rise time techniques. Kinematics and energy-momentum conservation laws were used to constrain the data analysis. Also the 3-α decay channel probability was measured. Such a simultaneous measurement of all known decay channels was useful to reduce the systematic errors. Preliminary results of the data analysis are reported.
Published: 2020
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4. Dynamical versus statistical production of Intermediate Mass Fragments at Fermi Energies

Author: G. Lanzalone, E. De Filippo, N. S. Martorana, Luis Acosta, E. Piasecki, K. Siwek-Wilczyńska, Triestino Minniti, F. Porto, Giuseppe Verde, B. Gnoffo, Lucrezia Auditore, E. V. Pagano, S. Pirrone, S. De Luca, Elio Rosato, Angelo Pagano, G. Politi, E. Geraci, C. Maiolino, T. Cap, Ivano Lombardo, M. Trimarchi, Antonio Trifiro, L. Quattrocchi, G. Cardella, Michele Papa, S. Norella, F. Rizzo, P. Russotto, J. Wilczynski, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Physics, Nuclear reaction, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Hadron, Nuclear Theory, Order (ring theory), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Isospin, 0103 physical sciences, Content (measure theory), Production (computer science), Neutron, Atomic number, Atomic physics, 010306 general physics, Nuclear Experiment
Abstract: International audience; The emission probability of Intermediate Mass Fragments (IMFs) in non-central reactions has been investigated in collisions of heavy $^{124}\hbox {Xe}$ projectiles with the two different medium-mass targets of $^{64}\hbox {Ni}$ and $^{64}\hbox {Zn}$ at the laboratory energy of 35 A MeV. The two colliding systems differ only for the target atomic number Z and, consequently, for the isospin N/Z ratio. The probability of IMFs emission from the projectile-like fragment has been measured, showing an enhancement of the IMFs emission for the neutron rich $^{64}\hbox {Ni}$ target. Most of the observed projectile break-up yield is associated with the production of only one IMF, that is, a quasi-binary splitting of projectile in two fragments in a broad range of charge asymmetry. For the events with one IMF, the relative contributions of the dynamical and statistical emissions have been evaluated. We find an enhancement of dynamical break-up probability for the neutron rich target with respect to the neutron poor one. The analysis suggests influence of the target isospin in inducing the dynamical break-up of projectile-like fragments. The new data have been also compared with previous published results of $^{112,124}\hbox {Sn}$ + $^{58,64}\hbox {Ni}$ systems, in order to disentangle between isospin effects against system-size effects on the emission probability. The comparisons between previous and new data suggest that the dynamical break-up is determined by the N/Z content of both projectile and target; for the cases here investigated, the influence of the system size on the dynamical emission probability can be excluded.
Published: 2020
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5. Nuclear neck-density determination at Fermi energy with CHIMERA detector

Author: Angelo Pagano, S. Pirrone, E. V. Pagano, Lucrezia Auditore, Michele Papa, P. Russotto, T. Cap, C. Maiolino, Antonio Trifiro, L. Quattrocchi, G. Politi, F. Rizzo, E. Piasecki, Luis Acosta, K. Siwek-Wilczyńska, B. Gnoffo, F. Favela, Maria Colonna, Marina Trimarchi, E. Geraci, G. Cardella, E. De Filippo, N. S. Martorana, M. B. Chatterjee, and G. Lanzalone
Subjects: Physics, Nuclear reaction, Nuclear and High Energy Physics, 010308 nuclear & particles physics, media_common.quotation_subject, Nuclear Theory, Fermi energy, Nuclear matter, 01 natural sciences, Asymmetry, Nuclear physics, Isospin, 0103 physical sciences, Nuclear fusion, Nuclear Experiment, 010306 general physics, Nucleon, Nuclear density, media_common
Abstract: Binary collisions of either stable or radioactive heavy ions at Fermi energies allow to study the nuclear reaction mechanisms under dynamical conditions of non-equilibrium and the formation of transient pieces of nuclear matter of very short mean life times at sub-normal density. An important role in the evolutionary phase of the collision is played by the gradient of the nuclear density affecting the isospin asymmetry of the reaction products by typical transport phenomena such as the isospin diffusion and drift. Experimental determination of the value of the nuclear matter density in the early phase of the collision is a crucial step towards understanding the underlying mechanism responsible for the production of clusters. In this paper a method for evaluating the nuclear density in semi-peripheral collisions in the reaction $$^{124}Sn + ^{64}Ni$$ at 35 MeV/nucleon as studied with the CHIMERA multi-particle detector is described.
Published: 2020

6. Gamma ray detection with CHIMERA at LNS: Results and perspectives

Author: E. De Filippo, N. S. Martorana, F. Favela, C. Maiolino, Luis Acosta, Nicla Gelli, Chiara Guazzoni, E. Geraci, E. V. Pagano, Antonio Trifiro, L. Quattrocchi, A. Pagano, S. De Luca, D. J. Marín-Lámbarri, M. Trimarchi, M.V. Andrés, V. L. Sicari, E. C. Pollacco, Michele Papa, Domenico Santonocito, G. Cardella, A. Nannini, A. Camaiani, G. Politi, B. Gnoffo, S. Pirrone, F. Rizzo, P. Russotto, E. G. Lanza, G. Lanzalone, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay
Subjects: Physics, History, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, Detector, Resolution (electron density), Gamma ray, 01 natural sciences, Resonance (particle physics), Charged particle, Computer Science Applications, Education, law.invention, Telescope, Nuclear physics, Stars, law, Excited state, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Nuclear Experiment, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: We describe the use of the 4tt CHIMERA charged particle detector as a large efficiency y-ray detector. The CsI(Tl) stage of the CHIMERA telescope is used to detect and identify y-rays. The high detection efficiency and the sufficient energy resolution guaranteed by CsI(Tl) allows us to use the detector for the study of rare decays. Two examples are reported: the low probability gamma decay (68Ni; the measurement of the gamma decay probability of excited levels of 12C as the Hoyle state at 7.65 (∼10−4) MeV and the 3- level at 9.64 MeV (∼107), both important for the Carbon production in stars. Future experiments made possible at INFN-LNS by the availability of the new fragment separator FRAISE are also outlined.
Published: 2020
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7. Measurements of pulse shape discrimination with EJ 299-33 plastic scintillator using heavy ion reaction

Author: E. V. Pagano, E. Geraci, T. Parsani, S. Pirrone, G. Cardella, Chiara Guazzoni, E. De Filippo, N. S. Martorana, M. B. Chatterjee, Michele Papa, Antonio Trifiro, F. Rizzo, Lucrezia Auditore, B. Gnoffo, L. Quattrocchi, F. Porto, G. Politi, S. De Luca, C. Maiolino, P. Russotto, G. Lanzalone, Marina Trimarchi, and Angelo Pagano
Subjects: Nuclear reaction, Nuclear and High Energy Physics, Photomultiplier, Physics::Instrumentation and Detectors, Charged particles detector, Digital acquisition, Neutrons detector, Plastic scintillator, Instrumentation, Scintillator, 01 natural sciences, Neutrons detector, Charged particles detector, Plastic scintillator, Digital acquisition, Ion, Optics, 0103 physical sciences, 010306 general physics, Physics, sezele, 010308 nuclear & particles physics, Scattering, business.industry, Anode, business, Beam (structure)
Abstract: The motivation of the present paper is to study the performance of EJ 299-33 scintillator in online and off-line analysis in high rate scattering for nuclear reaction experiments performed with heavy ions. An experiment was carried out inside the CHIMERA chamber using 24Mg beams at 71.5 MeV and 81 MeV impinging on 92ZrO2 target. The plastic scintillator was backed by a photomultiplier tube and the anode pulses were digitized through 100 MHz GET electronics for the purpose of pulse shape discrimination (PSD) studies. Performances of the plastic scintillator have been tested with respect to PSD capabilities and energy spectra analysis under beam irradiations in a high background environment.
Published: 2018
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8. The FARCOS detection system: the first application in a real experiment

Author: T. Parsani, Chiara Guazzoni, P. Russotto, E. V. Pagano, F. Fichera, D. Sciliberto, F. De Benedetti, V. L. Sicari, S. Norella, L. Quattrocchi, A. Pagano, Antonio Trifiro, S. Pirrone, S. De Luca, Andrea Castoldi, Lucrezia Auditore, F. Favela, S. Maffesanti, F. Rizzo, C. Boiano, E. Geraci, G. Lanzalone, G. Cardella, C. Maiolino, N. Giudice, F. Librizzi, Luis Acosta, Marina Trimarchi, A. Grimaldi, Michele Papa, B. Gnoffo, E. De Filippo, N. S. Martorana, G. Politi, G. Salemi, M. D'Andrea, G. Passaro, and G. Sacca
Subjects: Materials science, Calorimeter (particle physics), Silicon, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Detector, chemistry.chemical_element, Scintillator, Modular design, 01 natural sciences, 030218 nuclear medicine & medical imaging, Photodiode, law.invention, 03 medical and health sciences, 0302 clinical medicine, Optics, chemistry, law, 0103 physical sciences, Stage (hydrology), business
Abstract: FARCOS is a modular detection system intended to boost the capacity of 4π detectors towards correlation measurements. The final FARCOS system will be composed of 20 telescopes, each formed by two Si layers of 32-ch orthogonal Double Sided Silicon Strip Detectors and one calorimeter stage composed by 4 CsI(Tl) tronco-pyramidal scintillator crystals readout by a Si photodiode. The paper focuses on the first application of the FARCOS detection array in the present configuration of 10 telescopes in a real experiment, the CHIFAR experiment and discusses the main instrumental features relevant for the experiments.
Published: 2019
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9. Experimental investigation of α condensation in light nuclei

Author: S. Bailey, E. V. Pagano, Antonio Trifiro, L. Quattrocchi, L. Francalanza, Mariano Vigilante, P. Russotto, I. Stefan, S. De Luca, G. Lanzalone, Giuseppe Verde, F. Rizzo, M. Assié, S. Pirrone, A. Pagano, Luis Acosta, B. Gnoffo, T. Kokalova, D. Dell'Aquila, Martin Freer, Michele Papa, Robin Smith, G. Cardella, I. Lombardo, M. Trimarchi, G. Politi, C. Wheldon, E. De Filippo, N. S. Martorana, J. Bishop, N. Curtis, S. Norella, 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), Bishop, J., Kokalova, T., Freer, M., Acosta, L., Assie, M., Bailey, S., Cardella, G., Curtis, N., De Filippo, E., Dell'Aquila, D., De Luca, S., Francalanza, L., Gnoffo, B., Lanzalone, G., Lombardo, I., Martorana, N. S., Norella, S., Pagano, A., Pagano, E. V., Papa, M., Pirrone, S., Politi, G., Rizzo, F., Russotto, P., Quattrocchi, L., Smith, R., Stefan, I., Trifiro, A., Trimarchi, M., Verde, G., Vigilante, M., Wheldon, C., and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Reaction mechanism, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Nuclear Theory, 010308 nuclear & particles physics, Nuclear structure, Coulomb barrier, Nuclear Structure, Nuclear Clustering, Light nuclei, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Breakup, 01 natural sciences, Molecular physics, Dissociation (chemistry), medicine.anatomical_structure, 0103 physical sciences, medicine, Multiplicity (chemistry), 010306 general physics, Nuclear Experiment, Nucleus, Fermi Gamma-ray Space Telescope
Abstract: International audience; Background: Near-threshold α-clustered states in light nuclei have been postulated to have a structure consisting of a diffuse gas of α particles which condense into the 0s orbital. Experimental evidence for such a dramatic phase change in the structure of the nucleus has not yet been observed. Purpose: To understand the role of α condensation in light nuclei experimentally. Method: To examine signatures of this α condensation, a compound nucleus reaction using 160-, 280-, and 400-MeV O16 beams impinging on a carbon target was used to investigate the C12(O16,7α) reaction. This permits a search for near-threshold states in the α-conjugate nuclei up to Mg24. Results: Events up to an α-particle multiplicity of seven were measured and the results were compared to both an extended Hauser-Feshbach calculation and the Fermi breakup model. The measured multiplicity distribution exceeded that predicted from a sequential decay mechanism and had a better agreement with the multiparticle Fermi breakup model. Examination of how these 7α final states could be reconstructed to form Be8 and C12(02+) showed a quantitative difference in which decay modes were dominant compared to the Fermi breakup model. No new states were observed in O16, Ne20, and Mg24 due to the effect of the N-α penetrability suppressing the total α-particle dissociation decay mode. Conclusion: The reaction mechanism for a high-energy compound nucleus reaction can only be described by a hybrid of sequential decay and multiparticle breakup. Highly α-clustered states were seen which did not originate from simple binary reaction processes. Direct investigations of near-threshold states in N-α systems are inherently impeded by the Coulomb barrier prohibiting the observation of states in the N-α decay channel. No evidence of a highly clustered 15.1-MeV state in O16 was observed from [Si★28,C12(02+)]O16(06+) when reconstructing the Hoyle state from three α particles. Therefore, no experimental signatures for α condensation were observed.
Published: 2019
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10. Isospin Effect on fragment productions and reaction mechanisms for Ni+Ca systems at 25 AMeV

Author: Antonio Trifiro, Giovanni Casini, M. Trimarchi, F. Gramegna, S. Pirrone, F. Rizzo, Luca Morelli, E. Geraci, R. Bougault, N. Le Neindre, Sandro Barlini, C. Maiolino, E. V. Pagano, Maria Colonna, E. De Filippo, M. Bruno, P. Russotto, Michele Papa, A. Pagano, N. S. Martorana, G. Politi, G. Cardella, M. D'Agostino, B. Gnoffo, L. Monaco, G. Lanzalone, Silvia Piantelli, 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), 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: Multi-detectors, Physics, History, Reaction mechanism, Multifragmentation, Isospin asymmetries, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], 010308 nuclear & particles physics, Stereochemistry, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Out of equilibrium, 01 natural sciences, Excited systems, Fusion evaporation residues, Global variables, Computer Science Applications, Education, Fragment (logic), Isospin, 0103 physical sciences, 010306 general physics
Abstract: Main features of fragments produced in 58Ni+40Ca and 58Ni+48Ca systems at 25 AMeV, collected by Chimera multidetector at INFN Laboratori Nazionali del Sud (Italy), are analysed in order to study properties of moderately excited systems (Ex=2-5 AMeV) formed in central collisions. By means of correlations between specific global variables, sensitive to the centrality of the collision, a stringent selection of Fusion-Evaporation residues, Multifragmentation sources and their decay products has been performed. The influence of the isospin contents of the systems on the reaction mechanism is carefully investigated and relevant observables such as isospin asymmetry N/Z or charge and mass of fragments, are discussed in order to probe the fragmentation path, characterised by short living ( ∼ 100fm/c) low density states of nuclear matter out of equilibrium. Preliminary comparisons with predictions of the BLOB model, in a semi-classical mean field framework, are presented, investigating cluster production emerging from the occurrence of low-density instabilities in central collisions.
Published: 2019
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11. The $\gamma$ decay of the Hoyle and higher excitation energy states of $^{12}$C

Author: G. Cardella, F. Favela, G. Lanzalone, Nicla Gelli, M. Trimarchi, Chiara Guazzoni, E. Geraci, B. Gnoffo, L. Acosta, S. Pirrone, F. Rizzo, Michele Papa, Antonio Trifiro, L. Quattrocchi, E. V. Pagano, J. Marìn-Làmbarri, Domenico Santonocito, L. Monaco, E. C. Pollacco, P. Russotto, A. Nannini, Lucrezia Auditore, V. L. Sicari, A. Camaiani, G. Politi, C. Maiolino, E. De Filippo, N. S. Martorana, A. Pagano, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay
Subjects: Physics, Excitation energy, History, sezele, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], 010308 nuclear & particles physics, Ground state, Gamma rays, Carbon, 01 natural sciences, Computer Science Applications, Education, 0103 physical sciences, Energy level, Atomic physics, 010306 general physics, Excitation
Abstract: The 0 2 + Hoyle state and few other excited levels of 12C are fundamental for the production of carbon in the universe. In particular, the γ decay branching ratio is of utmost importance, being the only way to produce a carbon at the ground state. For the purpose to precisely investigate the decay mechanism of such states we conducted an experiment, at Laboratori Nazionali del Sud-Istituto Nazionale di Fisica Nucleare (INFN-LNS), using the reaction α + 12 C at 64 MeV. We used the 4π CHIMERA detector to detect both α and γ 12 C decay channels. Details of the experiment and preliminary results are discussed in the paper.
Published: 2019
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12. Isospin influence on fragments production in$^{78}$Kr + $^{40}$Ca and $^{86}$Kr + $^{48}$Ca collisions at 10 MeV/nucleon

Author: G. Spadaccini, E. V. Pagano, S. Pirrone, E. La Guidara, L. Quattrocchi, Maria Colonna, C. Beck, Michele Papa, F. Rizzo, Antonio Trifiro, E. Piasecki, Antonio D'Onofrio, E. Geraci, Denis Lacroix, M. La Commara, P. Russotto, Lucrezia Auditore, G. Politi, Sh. A. Kalandarov, Marina Trimarchi, Elio Rosato, E. De Filippo, B. Gnoffo, Mariano Vigilante, G. Lanzalone, A. Pagano, G. Cardella, F. Amorini, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-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), 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)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Pirrone, S., Politi, G., Gnoffo, B., La Commara, M., De Filippo, E., Russotto, P., Trimarchi, M., Vigilante, M., Colonna, M., Kalandarov, S. A., Amorini, F., Auditore, L., Beck, C., Cardella, G., D'Onofrio, A., Geraci, E., Lacroix, D., La Guidara, E., Lanzalone, G., Pagano, A., Pagano, E. V., Papa, M., Piasecki, E., Quattrocchi, L., Rizzo, F., Rosato, E., Spadaccini, G., and Trifiro, A.
Subjects: Physics, Elastic scattering, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Fission, Hadron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Spectral line, Nuclear physics, Isospin, 0103 physical sciences, Nuclear fusion, Neutron, 010306 general physics, Nucleon, Nuclear Experiment
Abstract: International audience; In heavy ion collisions at low energy (E/A < 10–15 MeV/nucleon) the N/Z ratio in the entrance channel is closely related to the isospin degree of freedom and can influence the reaction mechanisms and consequently the production of the fragments in the exit channel. We analyse the fragment production cross sections in the reactions$^{86}$Kr +$^{48}$Ca and$^{78}$Kr +$^{40}$Ca , at the laboratory energy of 10 MeV/nucleon. The experiment was conducted at the INFN Laboratori Nazionali del Sud in Catania, by using the $ 4\pi$ detector CHIMERA. For the two reactions, elastic scattering measurements are performed to extract the normalization factor used to evaluate the absolute cross sections. Velocity and energy spectra, mass and charge distributions, as well as dynamic features of reaction products, are studied. The study of the characteristics of mass and charge distributions, energy and velocity spectra of the reaction products shows mainly a relaxed component, related to fusion reaction followed by evaporation or binary decay. Nevertheless signals ascribable to a non equilibrated component are present. Structure effects are evident in the staggered shape of emitted fragments cross sections and are more pronounced in the neutron poor system. The analysis highlights clear differences for the two systems in the contributions arising from different reaction mechanisms. Besides, a study of the overall influence from the entrance channel energy is performed. Comparisons to DNS (DiNuclear System) and GEMINI++ models are reported. The data analysis indicates a slightly higher fusion-evaporation cross section and a strongly pronounced probability of fission-like processes for the neutron poor system with respect to the neutron rich one. The neutron enrichment seems thus to limit the formation of the composite system and to inhibit the fission decay channel.
Published: 2019
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13. Architecture of the FARCOS detection system and first beam experiments

Author: Antonio Trifiro, S. Pirrone, S. De Luca, N. Giudice, Luis Acosta, E. V. Pagano, G. Salemi, F. Favela, M. D'Andrea, V. L. Sicari, Michele Papa, G. Passaro, Andrea Castoldi, Lucrezia Auditore, G. Sacca, L. Quattrocchi, C. Maiolino, G. Politi, T. Parsani, F. Librizzi, F. Fichera, D. Sciliberto, B. Gnoffo, C. Boiano, G. Cardella, G. Lanzalone, S. Maffessanti, E. De Filippo, N. S. Martorana, A. Grimaldi, P. Russotto, F. De Benedetti, F. Rizzo, A. Pagano, Fabio Previdi, M. Trimarchi, S. Norella, and Chiara Guazzoni
Subjects: Physics, Modularity (networks), sezele, Calorimeter (particle physics), 010308 nuclear & particles physics, business.industry, Modular design, Scintillator, 01 natural sciences, Charged particle, 030218 nuclear medicine & medical imaging, law.invention, Telescope, 03 medical and health sciences, 0302 clinical medicine, Optics, law, 0103 physical sciences, Cluster (physics), business, Beam (structure)
Abstract: The FARCOS (Femtoscope ARray for Correlation and Spectroscopy) collaboration is finally going to instrument the first batch of 10-12 telescopes. They are capable of reconstructing the particle’s momentum with a high degree of precision and of performing correlation measurements of Light Charged Particles (LCPs) and of LCPs and Intermediate Mass Fragments thanks to the very good energy and angular and resolution. Each telescope features a sensitive area of 6.4 × 6.4 cm2 and is composed of three detection stages: two Si layers and a CsI(Tl) calorimeter. The FARCOS cluster modularity allows the arrangement in different configurations, depending on the physics case one wants to address. The final system will be a modular assembly of 20 telescopes. The total number of readout channels for the final FARCOS system is 2560 channels for the silicon layers and 80 channels for the scintillators. In this paper, we focus on the FARCOS basic module and system architecture and illustrate its performance as assessed in test beams in true experimental conditions.
Published: 2018
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14. First results of the Hoyle-Gamma experiment: Study of the excited levels in carbon-12 gamma decay

Author: F. Rizzo, A. Camaiani, S. Pirrone, F. Favela, Nicla Gelli, E. V. Pagano, G. Cardella, Antonio Trifiro, L. Quattrocchi, P. Russotto, E. De Filippo, Lucrezia Auditore, Michele Papa, S. De Luca, G. Politi, G. Lanzalone, C. Maiolino, N. S. Martorana, A. Nannini, D. J. Marín-Lámbarri, E. C. Pollacco, B. Gnoffo, Luis Acosta, A. Pagano, M. Trimarchi, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay
Subjects: Physics, History, 010308 nuclear & particles physics, Carbon-12, Gamma ray, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Measure (mathematics), Computer Science Applications, Education, Preliminary analysis, Nuclear physics, Physics and Astronomy (all), Orders of magnitude (time), Excited state, 0103 physical sciences, 010306 general physics
Abstract: International audience; Preliminary analysis of the Hoyle-Gamma experiment is presented, where simultaneous gamma-particles detection for the α + 12C → α + (12C* + γ) reaction is used to suppress the background various orders of magnitude. This will allow us to measure very small Γ partial widths of 12C. Details of the method, the implementation and CHIMERA software analysis are presented as well as preliminary results.
Published: 2018
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15. Structure of 10Be and 16C nuclei via break-up reactions studied with the 4π Chimera array

Author: F. Amorini, P. Russotto, Antonio Trifiro, L. Quattrocchi, Elio Rosato, G. Cardella, Amalia Pop, R. Andolina, Lucrezia Auditore, B. Gnoffo, Mariano Vigilante, D. Dell'Aquila, Michele Papa, F. Rizzo, G. Lanzalone, G. Politi, Giuseppe Verde, Triestino Minniti, E. De Filippo, E. V. Pagano, N. S. Martorana, M.B. Chatterjiee, I. Berceanu, S. Pirrone, L. Francalanza, Luis Acosta, A. Grzeszczuk, F. Porto, A. Pagano, M. Trimarchi, Ivano Lombardo, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Dell'Aquila, D., Acosta, L., Amorini, F., Andolina, R., Auditore, L., Berceanu, I., Cardella, G., Chatterjiee, M. B., De Filippo, E., Francalanza, L., Gnoffo, B., Grzeszczuk, A., Lanzalone, G., Lombardo, I., Martorana, N., Minniti, Domenica, Pagano, A., Pagano, E. V., Papa, M., Pirrone, S., Politi, Mauro, Pop, A., Porto, F., Quattrocchi, L., Rizzo, F., Rosato, E., Russotto, P., Trifirò, A., Trimarchi, M., Verde, G., and Vigilante, M.
Subjects: Nuclear reaction, History, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Education, Physics and Astronomy (all), Helium-4, Isotopes, 0103 physical sciences, Neutron, 010306 general physics, Spectroscopy, Nuclear Experiment, break-up reactions, Isotopes of helium, Physics, Valence (chemistry), 010308 nuclear & particles physics, Nuclear Structure, Nuclear Clustering, Light nuclei, Computer Science Applications, Physics::Accelerator Physics, Atomic physics, Isotopes of beryllium, Excitation
Abstract: International audience; The study of cluster states in neutron-rich Be and C isotopes is a subject of interest in Nuclear Physics. These states should be characterized by high deformation where α-clusters are bounded by valence neutrons. We performed a spectroscopic study of 10Be and 16C isotopes via projectile break-up reactions, by using radioactive beams produced at the INFN-LNS FRIBs facility and the Chimera 4π array. The possible evidence of a new 10Be state at 13.5 MeV excitation energy was found in the 6He+4He disintegration channel. The spectroscopy of 16C was studied via the 6He+10Be break-up channel; in this case we found the indication of a possible new state at about 20.6 MeV.
Published: 2018
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16. Statistical against dynamical PLF fission as seen by the IMF-IMF correlation functions and comparisons with CoMD model

Author: M. Trimarchi, Luis Acosta, K. Siwek-Wilczyńska, Lucrezia Auditore, L. Quattrocchi, B. Gnoffo, P. Russotto, G. Cardella, A. Pagano, Maria Colonna, G. Politi, E. Geraci, F. Rizzo, E. De Filippo, N. S. Martorana, E. V. Pagano, A. Trifirò, S. Pirrone, G. Lanzalone, F. Porto, E. Piasecki, T. Cap, Michele Papa, and C. Maiolino
Subjects: Nuclear reaction, Physics, History, 010308 nuclear & particles physics, Fission, media_common.quotation_subject, Binary number, Charge (physics), Function (mathematics), 01 natural sciences, Asymmetry, Computer Science Applications, Education, Nuclear physics, Correlation function (statistical mechanics), Physics and Astronomy (all), 0103 physical sciences, Nuclear Experiment, 010306 general physics, Fermi Gamma-ray Space Telescope, media_common
Abstract: In nuclear reactions at Fermi energies two and multi particles intensity interferometry correlation methods are powerful tools in order to pin down the characteristic time scale of the emission processes. In this paper we summarize an improved application of the fragment-fragment correlation function in the specific physics case of heavy projectile-like (PLF) binary massive splitting in two fragments of intermediate mass(IMF). Results are shown for the reverse kinematics reaction 124 Sn+64 Ni at 35 AMeV that has been investigated by using the forward part of CHIMERA multi-detector. The analysis was performed as a function of the charge asymmetry of the observed couples of IMF. We show a coexistence of dynamical and statistical components as a function of the charge asymmetry. Transport CoMD simulations are compared with the data in order to pin down the timescale of the fragments production and the relevant ingredients of the in medium effective interaction used in the transport calculations.
Published: 2018

17. Pulse shape discrimination of plastic scintillator EJ 299-33 with radioactive sources

Author: T. Parsani, Chiara Guazzoni, Lucrezia Auditore, F. Porto, G. Cardella, S. De Luca, S. Pirrone, Marina Trimarchi, G. Politi, M. B. Chatterjee, Michele Papa, A. Trifirò, L. Quattrocchi, E. V. Pagano, P. Russotto, G. Lanzalone, Angelo Pagano, C. Maiolino, E. De Filippo, N. S. Martorana, E. Geraci, F. Rizzo, and B. Gnoffo
Subjects: Photomultiplier, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Instrumentation, Scintillator, 01 natural sciences, Charged particles detection, Neutron and gamma detection, Plastic scintillator, Pulse shape discrimination, Optics, 0103 physical sciences, Figure of merit, Neutron, 010306 general physics, Physics, Neutron and gamma detection, Charged particles detection, Pulse shape discrimination, Plastic scintillator, sezele, 010308 nuclear & particles physics, business.industry, Alpha particle, Charged particle, Anode, business
Abstract: The present study has been carried out in order to investigate about the possibility of using EJ 299-33 scintillator in a multi-detector array to detect neutrons along with light charged particles. In a reaction induced by stable and exotic heavy-ions beams, where copious production of neutrons and other light charged particles occurs, discrimination with low identification threshold of these particles are of great importance. In view of this, EJ 299-33 scintillator having dimension of 3 cm × 3 cm × 3 cm backed by a photomultiplier tube was tested and used under vacuum to detect neutrons, gamma-rays and alpha particles emitted by radioactive sources. Anode pulses from the photomultiplier tube were digitized through GET electronics, recorded and stored in a data acquisition system for the purpose of an off-line analysis. The measurements, under vacuum and low background conditions, show good pulse shape discrimination properties characterized by low identification threshold for neutrons, gamma-rays and alpha particles. The Figures of Merit for neutron-gamma and alpha particles-gamma discriminations have been evaluated together with the energy resolution for gamma-ray and alpha particles.
Published: 2018

18. Study of resonances produced in Heavy Ion Collisions

Author: M. Trimarchi, A. Pagano, E. V. Pagano, E. De Filippo, N. S. Martorana, A. Trifirò, F. Rizzo, F. Porto, Giuseppe Verde, Michele Papa, S. Pirrone, L. Acosta, Martin Veselsky, Ismael Martel, G. Lanzalone, Lucrezia Auditore, P. Russotto, B. Gnoffo, A. Chbihi, F. Favela, G. Politi, L. Quattrocchi, G. Cardella, 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), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, History, Physics and Astronomy (all), 010308 nuclear & particles physics, 0103 physical sciences, Heavy ion, Atomic physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 010306 general physics, 01 natural sciences, Computer Science Applications, Education
Abstract: International audience; At Laboratori Nazionali del Sud of Catania an experiment has been carried out in order to investigate the correlations between particles produced in 12C+24Mg reaction at 35 AMeV incident energy. Two α correlation has been explored because provide information about temperature of 8Be nuclei produced in the reaction, while three α correaltion has been studied in order to evaluate the competition between sequential and direct decay mode of resonances produced in 12C quasi-projectiles.
Published: 2017
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19. Probing the Symmetry Term of the Nuclear Equation of State at High Baryonic Densities

Author: M. Trimarchi, A. Chbihi, Piotr Pawłowski, G. Lanzalone, Riccardo Introzzi, Roy Crawford Lemmon, S. Kupny, Yongjia Wang, Z. Matthews, F. Amorini, Marielle Chartier, M. Zoric, J. Brzychczyk, Chiara Guazzoni, F. Rizzo, N. Kurz, H. H. Wolter, Matthias Heil, M. Al-Garawi, D. M. Rossi, Zbigniew Sosin, P. Z. Wu, Maria Colonna, A. Budzanowski, Qingfeng Li, Yassid Ayyad, W. G. Lynch, Abdulrahman Alajlan, F. Porto, M. Mostazo, Sherry Yennello, Herbert A. Simon, P. Wigg, Giuseppe Verde, P. Cammarata, Lauren Heilborn, D. G. Sarantites, S. Al-Homaidhi, E. V. Pagano, S. Santoro, Mariano Vigilante, W. Reviol, A. Pagano, P. Guazzoni, S. Pirrone, L. Stuhl, T. Isobe, E. La Guidara, P. Lasko, K. Kezzar, J. Łukasik, L. Zetta, P. Russotto, L. Grassi, Michael Famiano, J. Benlliure, A. Wieloch, M. Boisjoli, I. Skwirczyńska, W. Trautmann, S. Gannon, Igor Gašparić, Jack Winkelbauer, Elio Rosato, A. Le Fèvre, Thomas Aumann, M. Kiš, P. Zambon, Z. Chajecki, Michele Papa, M. Adamczyk, Ivano Lombardo, M. B. Tsang, M. D. Cozma, A. Trifirò, Martin Veselsky, F. Riccio, Luis Acosta, Yvonne Leifels, E. De Filippo, K. Boretzky, L. W. May, Lucrezia Auditore, C. Caesar, G. Politi, M. Di Toro, B. Czech, Attila Krasznahorkay, G. Cardella, Paola Marini, Triestino Minniti, Zoran Basrak, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Russotto, P., Acosta, L., Adamczyk, M., Al-Ajlan, A., Al-Garawi, M., Al-Homaidhi, S., Amorini, F., Auditore, L., Aumann, T., Ayyad, Y., Basrak, Z., Benlliure, J., Boisjoli, M., Boretzky, K., Brzychczyk, J., Budzanowski, A., Caesar, C., Cardella, G., Cammarata, P., Chajecki, Z., Chartier, M., Chbihi, A., Colonna, M., Cozma, M. D., Czech, B., De Filippo, E., Di Toro, M., Famiano, M., Gannon, S., Gašparić, I., Grassi, L., Guazzoni, C., Guazzoni, P., Heil, M., Heilborn, L., Introzzi, R., Isobe, T., Kezzar, K., Kiš, M., Krasznahorkay, A., Kupny, S., Kurz, N., La Guidara, E., Lanzalone, G., Lasko, P., Le Fèvre, A., Leifels, Y., Lemmon, R. C., Li, Q. F., Lombardo, I., Łukasik, J., Lynch, W. G., Marini, P., Matthews, Z., May, L., Minniti, T., Mostazo, M., Pagano, A., Pagano, E. V., Papa, M., Pawłowski, P., Pirrone, S., Politi, G., Porto, F., Reviol, W., Riccio, F., Rizzo, F., Rosato, E., Rossi, D., Santoro, S., Sarantites, D. G., Simon, H., Skwirczynska, I., Sosin, Z., Stuhl, L., Trautmann, W., Trifirò, A., Trimarchi, M., Tsang, M. B., Verde, G., Veselsky, M., Vigilante, M., Wang, Yongjia, Wieloch, A., Wigg, P., Winkelbauer, J., Wolter, H. H., Wu, P., Yennello, S., Zambon, P., Zetta, L., and Zoric, M.
Subjects: Physics, Linear density, History, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], 010308 nuclear & particles physics, Nuclear Theory, Nuclear equation of state, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Charged particle, Symmetry (physics), Computer Science Applications, Education, Term (time), Nuclear physics, Baryon, Physics and Astronomy (all), symmetry energy, neutron flow, nuclear equation of state, heavy-ion scattering, relativistic quantum molecular dynamics, Darmstadt GSI FAIR, density dependence, transport theory, elliptic flow, 0.4 GeV/nucleon, Quantum electrodynamics, 0103 physical sciences, Neutron, 010306 general physics, Nucleon, Nuclear Experiment
Abstract: International audience; In the ASY-EOS experiment flows of neutrons and light charged particles were measured for (197)Au+(197)Au collisions at 400 MeV/nucleon, in order to investigate the strength of the symmetry term of the nuclear equation of state at supra-saturation densities. By comparing the experimental data with the UrQMD transport model predictions, we have extracted a new constraint in agreement with the moderately soft to linear density dependence obtained in the former analysis on FOPI-LAND data, but reducing the associated uncertainty by a factor ∼ 2.
Published: 2017
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20. Present status of the FARCOS detection system

Author: S. Pirrone, Chiara Guazzoni, Luis Acosta, L. Quattrocchi, G. Passaro, G. Salemi, G. Lanzalone, G. Cardella, F. Rizzo, G. Sacca, B. Gnoffo, A. Grimaldi, E. V. Pagano, N. Giudice, Andrea Castoldi, Lucrezia Auditore, E. De Filippo, N. S. Martorana, F. Favela, P. Russotto, T. Parsani, G. Politi, S. Norella, S. De Luca, C. Boiano, F. Librizzi, M. D'Andrea, C. Maiolino, S. Maffessanti, F. Fichera, D. Sciliberto, Michele Papa, A. Trifirò, A. Pagano, Fabio Previdi, and M. Trimarchi
Subjects: Nuclear and High Energy Physics, Preamplifier, STRIPS, Scintillator, 01 natural sciences, 030218 nuclear medicine & medical imaging, law.invention, Telescope, 03 medical and health sciences, 0302 clinical medicine, Optics, Settore ING-INF/04 - Automatica, law, Nuclear Medicine and Imaging, 0103 physical sciences, Instrumentation, Radiology, Nuclear Medicine and Imaging, detectors, Physics, Calorimeter (particle physics), 010308 nuclear & particles physics, business.industry, Nuclear science, Attenuation length, Instrumentation, Radiology, Nuclear Medicine and Imaging, Nuclear and High Energy Physics, Full width at half maximum, business, Radiology, Energy (signal processing)
Abstract: Few years ago we proposed a novel detection system textbf- named FARCOS (Femtoscopy ARray for COrrelations andSpectroscopy) – to target different open cases in nuclear physics. The basic cluster unit of the FARCOS array is a telescope structure with an active area of $6.4 \times 6.4$ cm$^{\mathbf {2}}$ composed of three detection stages. The first two detection layers are DC-coupled Double-Sided Silicon Strip Detectors (DSSSDs), 300 $\mu \textbf{m}$ thick and 1500 $\mu \textbf{m}$ thick, featuring $32 \times 32$ orthogonal strips. The third stage, acting as calorimeter, is composed of four truncated pyramids of CsI(Tl) crystals with an active area of $3.2 \times 3.2$ cm$^{\mathbf {2\, }}$textbfand an absorption length of 6 cm arranged in window configuration. The final system will be a modular assembly of 20 telescopes.A key feature of FARCOS is the identification of the particles stopping even in the first detection layer, relying on pulse shape analysis techniques. The FARCOS frontend electronics features a full scale energy range up to 2 GeV with 5 different selectable ranges and an energy resolution down to 10 keV FWHM with a power budget of about 10 mW/channel in the case of the lower full scale energy range. Its core is a custom multichannel charge preamplifier VLSI chip.The system performance has been extensively qualified on few workhorses in view of the assembly of the final telescopes foreseen for 2018.
Published: 2017

21. Experimental Studies of the Structure of ^{;;; ; 16};;; ; C with Reactions at Intermediate Energy

Author: Giuseppe Verde, S. Pirrone, S. De Luca, L. Francalanza, E. V. Pagano, Ivano Lombardo, D. Dell'Aquila, M. Trimarchi, S. Norella, E. De Filippo, N. S. Martorana, P. Russotto, Antonio Trifiro, L. Quattrocchi, Michele Papa, Mariano Vigilante, G. Lanzalone, A. Pagano, F. Rizzo, Lucrezia Auditore, G. Politi, L. Acosta, B. Gnoffo, G. Cardella, Dell'Aquila, Daniele, Acosta, L., Auditore, L., Cardella, G., De Filippo, E., De Luca, S., Francalanza, L., Gnoffo, B., Lanzalone, G., Lombardo, I., Martorana, N. S., Norella, S., Pagano, A., Pagano, E. V., Papa, M., Pirrone, S., Politi, G., Quattrocchi, L., Rizzo, F., Russotto, P., Trifirò, A., Trimarchi, M., Verde, G., Vigilante, M., Institut de Physique Nucléaire d'Orsay (IPNO), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, 010308 nuclear & particles physics, Excitation energy, Cluster structure, Cocktail beam, Intermediate energies, Invariant mass, Multi-detectors, Reaction intermediates, Nuclear Theory, Structure (category theory), General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Physics and Astronomy (all), Intermediate energy, Chemical physics, 0103 physical sciences, 010306 general physics, Nuclear Experiment
Abstract: International audience; The possible existence of cluster structures in 16C has been investigated by inspecting their breakup (induced on CH2 targets) in 10Be+6He events. The excitation energy of the projectile nucleus prior to decay is obtained via an invariant mass analysis of identified fragments. The experiment has been carried out at the FRIBs facility of INFN-LNS, by using a fragmentation cocktail beam at intermediate energies (≈ 55 MeV/nucleon) and the CHIMERA 4π multi-detector. A non-vanishing yield in the 10Be+6He correlations is reported at an excitation energy of about 20.5 MeV in 16C, in analogy with previous works. To improve these results, we recently performed a new experiment by coupling CHIMERA and FARCOS at forward angles. Preliminary details of the new experiment are reported in the text.
Published: 2017
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22. Fragmentation studies with the CHIMERA detector at LNS in Catania: recent progress

Author: H. Wu, L. Auditore, J. Blicharska, M. Papa, G. Vannini, M. Trimarchi, S. M. Li, L. Zetta, Z. Majka, Angelo Pagano, S. Lo Nigro, M. L. Sperduto, T. Paduszynski, G. Lanzalone, G. Lanzanó, A. Chbihi, I. Skwira, M. Iacono-Manno, E. La Guidara, M.F Rivet, M. Bruno, J.P. Wieleczko, K. Siwek-Wilczyńska, Maria Colonna, R. Bougault, G.R. Sechi, E. Rosato, Monica Alderighi, Amalia Pop, V. Simion, J. Cibor, N. Le Neindre, J.C. Steckmeyer, F. Rizzo, F. Porto, E. De Filippo, L. Swiderski, P. Russotto, A. Anzalone, V. Baran, Zhigang Xiao, M. Bartolucci, R. Planeta, M. D'Agostino, J. Wilczynski, M. Di Toro, A. Bonasera, P. Guazzoni, A. Grzeszczuk, R. Dayras, S. Cavallaro, I. Berceanu, S. Russo, E. Geraci, F. Giustolisi, B. Borderie, J. Brzychczyk, M. Sassi, S. Kowalski, W. Gawlikowicz, E. Piasecki, A. Trifiro, Mariano Vigilante, G. Politi, L. Arena, S. Pirrone, W. Zipper, D. Guinet, G. Cardella, G. Manfredi, F. Amorini, C. Maiolino, M. Petrovici, M. B. Chatterjee, 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)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), A. Pagano, M. Alderighi, F. Amorini, A. Anzalone, L. Arena, L. Auditore, V. Baran, M. Bartolucci, I. Berceanu, J. Blicharska, J.Brzychczyk, A. Bonasera, B. Borderie, R. Bougault, M. Bruno, G.Cardella, S. Cavallaro, M.B. Chatterjee, A. Chbihi, J. Cibor, M.Colonna, M. D'Agostino, R. Dayra, E. De Filippo, M. Di Toro, W.Gawlikowicz, E. Geraci, F. Giustolisi, A. Grzeszczuk, P. Guazzoni, D.Guinet, M. Iacono-Manno, S. Kowalski, E. La Guidara, G. Lanzano', G.Lanzalone, N.Le Neindre, S. Li, S. Lo Nigro, C. Maiolino, Z. Majka, G. Manfredi, T. Paduszynski, M. Papa, M. Petrovici, E. Piasecki, S.Pirrone, R. Planeta, G. Politi, A. Pop, F. Porto, M.F. Rivet, E. Rosato, F. Rizzo, S. Russo, P. Russotto, M. Sassi, G. Sechi, V. Simion, K. Siwek-Wilczynska, I. Skwira, M.L. Sperduto, J.C. Steckmeyer, L. Swiderski, A. Trifiro`, M. Trimarchi, G. Vannini, M. Vigilante, J.P. Wieleczko, J. Wilczynski, H. Wu, Z. Xiao, L. Zetta, W. Zipper, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Nuclear reaction, Nuclear and High Energy Physics, APPARATO DI RIVELAZIONE, TECNICHE DI IDENTIFICAZIONE, REAZIONI NUCLEARI SEMI-PERIFERICHE, PRODUZIONE DI FRAMMENTI DI MASSA INTERMEDIA, TEMPI DI PRODUZIONE DEI FRAMMENTI, Cyclotron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Particle identification, law.invention, Ion, Nuclear physics, law, 0103 physical sciences, Nuclear Experiment, 010306 general physics, Physics, 010308 nuclear & particles physics, Detector, Charged particle, Time of flight, Nucleon
Abstract: The new detector CHIMERA, in its final 4π configuration, has been installed at Laboratori Nazionali del Sud (LNS) in Catania in January 2003. Beams of different energies ranging from protons to Au ions were delivered by the Tandem and the Super Conducting Cyclotron for nuclear reaction studies, in agreement with the approval of the Scientific Advisory Committee of LNS. Recent experimental results confirm very low energy thresholds of the trigger (below 0.5 MeV/nucleon), ensured within a wide dynamical range. Good characteristics of identification of light charged particles and heavy fragments have been obtained by using three detection techniques: Δ E-E , Δ E -time of flight, and the Pulse-Shape discrimination method. We present results of recent analysis concerning the production of intermediate mass fragments (IMF) in semi-peripheral collisions. Our results combined with theoretical Boltzmann-Nordheim-Vlasov simulations clearly demonstrate the presence of very fast processes of IMF production in the overlapping region of the target and projectile nuclei during re-separation, i.e. in the time scale comparable with the collision time. Evidence for slower, sequential-like production of IMF's is also shown.
Published: 2004
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23. Results of the ASY-EOS experiment at GSI: The symmetry energy at suprasaturation density

Author: S. Al-Homaidhi, Abdulrahman Alajlan, A. Wieloch, F. Amorini, Angelo Pagano, Marielle Chartier, E. Rosato, Roy Crawford Lemmon, D. G. Sarantites, S. Kupny, Z. Chajecki, Martin Veselsky, Tadaaki Isobe, M. B. Tsang, F. Riccio, Z. Basrak, Triestino Minniti, A. Chbihi, G. Cardella, P. Zambon, Piotr Pawłowski, J. Benlliure, Giuseppe Verde, Michele Papa, M. Adamczyk, L. Stuhl, Marina Trimarchi, M.D. Cozma, J. Brzychczyk, A. Trifirò, E. De Filippo, C. Caesar, Z. Matthews, Maria Colonna, Lauren Heilborn, F. Rizzo, S. Santoro, N. Kurz, S. Pirrone, S. Gannon, H. H. Wolter, M. Kiš, Luis Acosta, P. Cammarata, Igor Gašparić, Jack Winkelbauer, P. Lasko, Michael Heil, E. La Guidara, Y. Leifels, A. Le Fèvre, A. Krasznahorkay, K. Boretzky, M. Di Toro, B. Czech, I. Lombardo, Thomas Aumann, P. Wigg, E. V. Pagano, M. Boisjoli, K. Kezzar, Paola Marini, W. Reviol, P. Guazzoni, Michael Famiano, I. Skwirczyńska, L. Zetta, P. Russotto, Sherry Yennello, F. Porto, M. Mostazo, W. G. Lynch, H. Simon, M. Zoric, Riccardo Introzzi, M. Al-Garawi, P. Z. Wu, Yassid Ayyad, J. Łukasik, L. Grassi, Chiara Guazzoni, A. Budzanowski, D. M. Rossi, Zbigniew Sosin, Qingfeng Li, Mariano Vigilante, W. Trautmann, G. Lanzalone, Yongjia Wang, L. W. May, Lucrezia Auditore, G. Politi, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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 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), Russotto, P., Gannon, S., Kupny, S., Lasko, P., Acosta, L., Adamczyk, M., Al-Ajlan, A., Al-Garawi, M., Al-Homaidhi, S., Amorini, F., Auditore, L., Aumann, T., Ayyad, Y., Basrak, Z., Benlliure, J., Boisjoli, M., Boretzky, K., Brzychczyk, J., Budzanowski, A., Caesar, C., Cardella, G., Cammarata, P., Chajecki, Z., Chartier, M., Chbihi, A., Colonna, M., Cozma, M. D., Czech, B., De Filippo, E., Di Toro, M., Famiano, M., Gašparić, I., Grassi, L., Guazzoni, C., Guazzoni, P., Heil, M., Heilborn, L., Introzzi, R., Isobe, T., Kezzar, K., Kiš, M., Krasznahorkay, A., Kurz, N., La Guidara, E., Lanzalone, G., Le Fèvre, A., Leifels, Y., Lemmon, R. C., Li, Q. F., Lombardo, I., Łukasik, J., Lynch, W. G., Marini, P., Matthews, Z., May, L., Minniti, T., Mostazo, M., Pagano, A., Pagano, E. V., Papa, M., Pawłowski, P., Pirrone, S., Politi, G., Porto, F., Reviol, W., Riccio, F., Rizzo, F., Rosato, E., Rossi, D., Santoro, S., Sarantites, D. G., Simon, H., Skwirczynska, I., Sosin, Z., Stuhl, L., Trautmann, W., Trifirò, A., Trimarchi, M., Tsang, M. B., Verde, G., Veselsky, M., Vigilante, M., Wang, Yongjia, Wieloch, A., Wigg, P., Winkelbauer, J., Wolter, H. H., Wu, P., Yennello, S., Zambon, P., Zetta, L., and Zoric, M.
Subjects: Physics, Nuclear and High Energy Physics, sezele, 010308 nuclear & particles physics, Elliptic flow, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Charged particle, Symmetry (physics), Nuclear physics, symmetry energy, neutron flow, nuclear equation of state, heavy-ion scattering, relativistic quantum molecular dynamics, Darmstadt GSI FAIR, density dependence, transport theory, elliptic flow, 0.4 GeV/nucleon, 0103 physical sciences, HEAVY-ION COLLISIONS, EQUATION-OF-STATE, MASS-RADIUS RELATION, COLLECTIVE FLOW, PION-PRODUCTION, NEUTRON, DEPENDENCE, FRAGMENTATION, SYSTEMATICS, EMISSION, Large Area Neutron Detector, Neutron, Nuclear Experiment (nucl-ex), Nuclear Experiment, 010306 general physics, Nucleon, Event (particle physics), Parametrization
Abstract: Directed and elliptic flows of neutrons and light charged particles were measured for the reaction 197Au+197Au at 400 MeV/nucleon incident energy within the ASY-EOS experimental campaign at the GSI laboratory. The detection system consisted of the Large Area Neutron Detector LAND, combined with parts of the CHIMERA multidetector, of the ALADIN Time-of-flight Wall, and of the Washington-University Microball detector. The latter three arrays were used for the event characterization and reaction-plane reconstruction. In addition, an array of triple telescopes, KRATTA, was used for complementary measurements of the isotopic composition and flows of light charged particles. From the comparison of the elliptic flow ratio of neutrons with respect to charged particles with UrQMD predictions, a value \gamma = 0.72 \pm 0.19 is obtained for the power-law coefficient describing the density dependence of the potential part in the parametrization of the symmetry energy. It represents a new and more stringent constraint for the regime of supra-saturation density and confirms, with a considerably smaller uncertainty, the moderately soft to linear density dependence deduced from the earlier FOPI-LAND data. The densities probed are shown to reach beyond twice saturation., Comment: 25 pages, 22 figures, accepted for publication in Physical Review C
Published: 2016
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24. The symmetry energy at suprasaturation density and the ASY-EOS experiment at GSI

Author: S. Santoro, P. Lasko, Luis Acosta, D. G. Sarantites, S. Al-Homaidhi, K. Boretzky, Giuseppe Verde, F. Porto, S. Pirrone, Z. Chajecki, E. V. Pagano, D. M. Rossi, Zbigniew Sosin, Qingfeng Li, A. Wieloch, Sherry Yennello, F. Rizzo, L. Stuhl, M. B. Tsang, L. Zetta, Roy Crawford Lemmon, S. Kupny, Maria Colonna, M. Kiš, Martin Veselsky, P. Zambon, C. Caesar, F. Riccio, P. Cammarata, Yvonne Leifels, I. Skwirczyńska, J. Benlliure, Marina Trimarchi, Chiara Guazzoni, Mariano Vigilante, A. Trifirò, P. Russotto, Z. Basrak, A. Chbihi, L. W. May, W. Trautmann, M. Di Toro, Piotr Pawłowski, B. Czech, E. La Guidara, M.D. Cozma, W. Reviol, A. Pagano, P. Guazzoni, H. H. Wolter, Michael Famiano, J. Brzychczyk, E. De Filippo, M. Al-Garawi, G. Cardella, G. Lanzalone, Z. Matthews, Igor Gašparić, Jack Winkelbauer, W. G. Lynch, A. Budzanowski, N. Kurz, L. Grassi, M. Mostazo, A. Le Fèvre, Elio Rosato, Paola Marini, M. Zoric, Thomas Aumann, A. Krasznahorkay, Herbert A. Simon, Riccardo Introzzi, Yongjia Wang, P. Wigg, K. Kezzar, Abdulrahman Alajlan, J. Łukasik, P. Z. Wu, Yassid Ayyad, Triestino Minniti, Ivano Lombardo, Lucrezia Auditore, G. Politi, M. Boisjoli, F. Amorini, Marielle Chartier, Lauren Heilborn, Tadaaki Isobe, Matthias Heil, Michele Papa, M. Adamczyk, S. Gannon, 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), 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), De Filippo, E., Russotto, P., Acosta, L., Adamczyk, M., Al-Ajlan, A., Al-Garawi, M., Al-Homaidhi, S., Amorini, F., Auditore, L., Aumann, T., Ayyad, Y., Basrak, Z., Benlliure, J., Boisjoli, M., Boretzky, K., Brzychczyk, J., Budzanowski, A., Caesar, C., Cardella, G., Cammarata, P., Chajecki, Z., Chartier, M., Chbihi, A., Colonna, M., Cozma, M. D., Czech, B., Di Toro, M., Famiano, M., Gannon, S., Gašparić, I., Grassi, L., Guazzoni, C., Guazzoni, P., Heil, M., Heilborn, L., Introzzi, R., Isobe, T., Kezzar, K., Kiš, M., Krasznahorkay, A., Kupny, S., Kurz, N., La Guidara, E., Lanzalone, G., Lasko, P., Le Fèvre, A., Leifels, Y., Lemmon, R. C., Li, Q. F., Lombardo, I., Łukasik, J., Lynch, W. G., Marini, P., Matthews, Z., May, L., Minniti, T., Mostazo, M., Pagano, A., Pagano, E. V., Papa, M., Pawłowski, P., Pirrone, S., Politi, G., Porto, F., Reviol, W., Riccio, F., Rizzo, F., Rosato, E., Rossi, D., Santoro, S., Sarantites, D. G., Simon, H., Skwirczynska, I., Sosin, Z., Stuhl, L., Trautmann, W., Trifirò, A., Trimarchi, M., Tsang, M. B., Verde, G., Veselsky, M., Vigilante, M., Wang, Yongjia, Wieloch, A., Wigg, P., Winkelbauer, J., Wolter, H. H., Wu, P., Yennello, S., Zambon, P., Zetta, L., and Zoric, M.
Subjects: energy: symmetry, QC1-999, Hadron, Nuclear Theory, Elementary particle, Astrophysics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Nuclear physics, Physics and Astronomy (all), 0103 physical sciences, Neutron, ddc:530, 010306 general physics, Nuclear Experiment, Physics, 010308 nuclear & particles physics, Elliptic flow, gold, charged particle, Charged particle, Symmetry (physics), Darmstadt Lab, n: elliptic flow, nucleus: equation of state, density dependence, density, Baryon, Nucleon, light nucleus, saturation: density, experimental results
Abstract: International audience; The ASY-EOS experiment at GSI laboratory measured the direct and elliptic flow of neutrons and light charged particles in the reaction 197Au+197 Au at 400 A MeV incident energy. The ratio of elliptic flow of neutrons with respect to that of the light charged particles was used as main experimental observable to probe the density dependence of the symmetry energy term of the nuclear equation of state. Results, obtained by comparison of the experimental data with the UrQMD model predictions, strongly support a moderately soft to linear density dependence of the symmetry energy at suprasaturation densities below 2ρ0.
Published: 2016
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25. Alpha-particle clustering in excited alpha-conjugate nuclei

Author: G. Lanzano, G. Cardella, R. Alba, F. Amorini, N. Le Neindre, E. De Filippo, D. Guinet, Ivano Lombardo, F. Porto, P. Lautesse, Michele Papa, E. Geraci, G. Politi, S. Pirrone, G. Lanzalone, A. Pagano, J.P. Wieleczko, O. Lopez, M. B. Chatterjee, G. Ademard, P. Russotto, F. Rizzo, M.F. Rivet, C. Maiolino, B. Borderie, Ad.R. Raduta, E. La Guidara, 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), 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), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nuclear reaction, Physics, History, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], 010308 nuclear & particles physics, Nuclear Theory, Alpha (ethology), Alpha particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Computer Science Applications, Education, Physics and Astronomy (all), Excited state, 0103 physical sciences, Incident energy, Atomic physics, 010306 general physics, Nucleon, Cluster analysis, Nuclear Experiment, Conjugate
Abstract: International audience; The nuclear reaction (40)Ca+(12)C at 25 MeV per nucleon incident energy was used to produce excited alpha-conjugate fragments from projectile fragmentation mechanism. From a careful selection provided by a complete detection and from comparisons with models of sequential and simultaneous decays, evidence in favor of α-particle clustering from excited light alpha-conjugate nuclei is reported.
Published: 2016
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26. High multiplicity α-particle breakup measurements to study α-condensate states

Author: A. Pagano, G. Cardella, G. Lanzalone, Antonio Trifiro, L. Quattrocchi, Giuseppe Verde, S. Pirrone, P. Russotto, Ivano Lombardo, I. Stefan, S. Norella, C. Wheldon, M. Trimarchi, Tz. Kokalova, S. De Luca, M Assie, F. Rizzo, E. V. Pagano, E. De Filippo, Martin Freer, D. Dell'Aquila, N. S. Martorana, J. Bishop, S. Bailey, G. Politi, N. Curtis, B. Gnoffo, L. Francalanza, Mariano Vigilante, Robin Smith, Luis Acosta, Michele Papa, 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), 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), Bishop, J., Kokalova, Tz, Freer, M., Assie, M., Acosta, L., Bailey, S., Cardella, G., Curtis, N., De Filippo, E., Dell'Aquila, D., De Luca, S., Francalanza, L., Gnoffo, B., Lanzalone, G., Lombardo, I., Martorana, N., Norella, S., Pagano, A., Pagano, E. V., Papa, M., Pirrone, S., Politi, G., Rizzo, F., Russotto, P., Quattrocchi, L., Smith, R., Stefan, I., Trifirò, A., Trimarchì, M., Verde, G., Vigilante, M., and Wheldon, C.
Subjects: Physics, History, 010308 nuclear & particles physics, Solid angle, Alpha particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Breakup, 01 natural sciences, Charged particle, Particle identification, Computer Science Applications, Education, Nuclear physics, Physics and Astronomy (all), 0103 physical sciences, Energy dissipation, Beam energies, Condensed state, Excitation regime, High multiplicity, High-solids, Particle breakup, Particle identifications, Particle multiplicity, Particles (particulate matter), Multiplicity (chemistry), 010306 general physics, Excitation, Beam (structure)
Abstract: International audience; An experiment was performed to investigate α-condensate states via high α-particle multiplicity breakup. The nucleus of interest was (28)Si therefore to measure multiplicity 7 particle breakup events, a highly granular detector with a high solid angle coverage was required. For this purpose, the CHIMERA and FARCOS detectors at INFN LNS were employed. Particle identification was achieved through ΔE-E energy loss. The α-particle multiplicity was measured at three beam energies to investigate different excitation regimes in (28)Si. At a beam energy where the energy is sufficient to provide the 7 α-particles with enough energy to be identified using the ΔE-E method, multiplicity 7 events can be seen. Given these high multiplicity events, the particles can be reconstructed to investigate the breakup of α-condensate states. Analysing the decay paths of these states can elucidate whether the state of interest corresponds to a non-cluster, clustered or condensed state.
Published: 2016
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27. 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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28. Quasifission and fusion-fission processes in the reactionsKr78+Ca40andKr86+Ca48at 10 MeV/nucleon bombarding energy

Author: J.P. Wieleczko, S. Pirrone, G. G. Adamian, N. V. Antonenko, G. Politi, Denis Lacroix, and Sh. A. Kalandarov
Subjects: Physics, Fusion, Photon, 010308 nuclear & particles physics, Nuclear Theory, Charge (physics), Fusion fission, 7. Clean energy, 01 natural sciences, Nuclear physics, Yield (chemistry), 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Energy (signal processing), Excitation
Abstract: Within the dinuclear system model the charge, mass, and isotopic distributions of the products in the reactions $^{78}\mathrm{Kr}+^{40}\mathrm{Ca}$ and $^{86}\mathrm{Kr}+^{48}\mathrm{Ca}$ are predicted at bombarding energy 10 MeV/nucleon. The heavy-ion phase-space exploration code is applied to take into consideration the pre-equilibrium emission of light particles. The competition is treated between complete fusion followed by the decay of compound nucleus and quasifission channels. The possible explanation of the odd-even staggering in the yield of the final reaction products at high excitation energies is discussed.
Published: 2016
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29. New experimental investigation of the structure ofBe10andC16by means of intermediate-energy sequential breakup

Author: M.B. Chatterjiee, Elio Rosato, G. Lanzalone, L. Francalanza, Luis Acosta, G. Cardella, Marina Trimarchi, Michele Papa, F. Porto, Giuseppe Verde, A. Pagano, S. Pirrone, Mariano Vigilante, R. Andolina, B. Gnoffo, Lucrezia Auditore, D. Dell'Aquila, E. V. Pagano, Antonio Trifiro, Ivano Lombardo, L. Quattrocchi, G. Politi, E. De Filippo, P. Russotto, and F. Rizzo
Subjects: Physics, 010308 nuclear & particles physics, Projectile, Breakup, 01 natural sciences, Intermediate energy, Angular correlation, Excited state, 0103 physical sciences, Cluster (physics), Atomic physics, 010306 general physics, Spectroscopy, Relative energy
Abstract: Be10 and C16 spectroscopy has been investigated by analyzing their breakup events on CH2 and CD2 targets. Breakup fragments have been detected by means of the CHIMERA detector. In particular, we investigated cluster decays of Be10 in He4+He6 and of C16 in He6+Be10 and He4+He6+He6. From the relative energy analysis of breakup fragments, we investigate the spectroscopy of excited states of projectile nuclei. In the Be10 case we observe known states at 9.51, 10.16, 10.6, and 11.8 MeV. Further, we suggest the existence of a new state at 13.5 MeV, possibly 6+ as indicated from angular correlation analysis. The relative energy (Erel+Eth) spectrum of C16, reconstructed starting from He6+Be10 correlations, shows a peak at about 20.6 MeV, probably related to the existence of an high-lying excited state. Non-vanishing yields are also seen in the triple coincidences He4+He6+He6.
Published: 2016
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30. The ASY-EOS Experiment at GSI

Author: Z. Basrak, A. Chbihi, Piotr Pawłowski, H. H. Wolter, Giuseppe Verde, Z. Matthews, S. Pirrone, Z. Chajecki, Maria Colonna, M. B. Tsang, J. Łukasik, F. Amorini, F. Rizzo, Abdulrahman Alajlan, Triestino Minniti, P. Cammarata, Marielle Chartier, Chiara Guazzoni, A. Budzanowski, Zbigniew Sosin, Qingfeng Li, L. Grassi, B. Czech, Martin Veselsky, F. Riccio, W. G. Lynch, N. Kurz, Vincenzo Greco, Yvonne Leifels, M. Boisjoli, Attila Krasznahorkay, Sherry Yennello, L. Stuhl, Herbert A. Simon, Mariano Vigilante, W. Trautmann, P. Russotto, S. Al-Homaidhi, W. Reisdorf, F. Porto, A. Wieloch, P. Wigg, E. La Guidara, K. Kezzar, I. Skwirczyńska, L. Zetta, Paola Marini, M. Kiš, M. Zoric, Igor Gašparić, G. Lanzalone, R. Pleskac, Elio Rosato, Angelo Pagano, M. D. Cozma, Lauren Heilborn, L. Acosta, E. De Filippo, Riccardo Introzzi, Roy Crawford Lemmon, S. Gannon, D. Rossi, M. Di Toro, C. Boiano, S. Kupny, G. Cardella, Michele Papa, M. Adamczyk, J. Benlliure, Rene Reifarth, P. Z. Wu, A. Trifirò, Yassid Ayyad, Matthias Heil, Ivano Lombardo, M. Al-Garawi, Tadaaki Isobe, P. Guazzoni, Michael Famiano, M. Trimarchi, R. Bassini, A. Le Fèvre, Thomas Aumann, J. Brzychczyk, Lucrezia Auditore, G. Politi, L. W. May, K. Boretzky, M. Mostazo, S. Santoro, P. Lasko, V. Baran, P. Zambon, 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), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Greco, V., Russotto, P., Chartier, M., Cozma, M. D., De Filippo, E., Le Fèvre, A., Gannon, S., Gašparić, I., Kiš, M., Kupny, S., Leifels, Y., Lemmon, R. C., Li, Q., Aukasik, J., Marini, P., Pawłowski, P., Trautmann, W., Acosta, L., Adamczyk, M., Al-Ajlan, A., Al-Garawi, M., Al-Homaidhi, S., Amorini, F., Auditore, L., Aumann, T., Ayyad, Y., Baran, V., Basrak, Z., Bassini, R., Benlliure, J., Boiano, C., Boisjoli, M., Boretzky, K., Brzychczyk, J., Budzanowski, A., Cardella, G., Cammarata, P., Chajecki, Z., Chbihi, A., Colonna, M., Czech, B., Di Toro, M., Famiano, M., Grassi, L., Guazzoni, C., Guazzoni, P., Heil, M., Heilborn, L., Introzzi, R., Isobe, T., Kezzar, K., Krasznahorkay, A., Kurz, N., La Guidara, E., Lanzalone, G., Lasko, P., Lombardo, I., Lynch, W. G., Matthews, Z., May, L., Minniti, T., Mostazo, M., Pagano, A., Papa, M., Pirrone, S., Pleskac, R., Politi, G., Porto, F., Reifarth, R., Reisdorf, W., Riccio, F., Rizzo, F., Rosato, E., Rossi, D., Santoro, S., Simon, H., Skwirczynska, I., Sosin, Z., Stuhl, L., Trifirò, A., Trimarchi, M., Tsang, M. B., Verde, G., Veselsky, M., Vigilante, M., Wieloch, A., Wigg, P., Wolter, H. H., Wu, P., Yennello, S., Zambon, P., Zetta, L., Zoric, M., Greco, Vincenzo, La Cognata, M., Pirrone, Sara, Rizzo, Francesca, Spitaleri, Claudio, and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: DENSITY-DEPENDENCE, COLLISIONS, heavy ion: scattering, energy: symmetry, QC1-999, Hadron, Nuclear Theory, Elementary particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Ion, Nuclear physics, Physics and Astronomy (all), quantum molecular dynamics: relativistic, symmetry energy, neutron flow, nuclear equation of state, heavy-ion scattering, relativistic quantum molecular dynamics, Darmstadt GSI FAIR, density dependence, transport theory, elliptic flow, 0.4 GeV/nucleon, 0103 physical sciences, Neutron, 010306 general physics, PROBE, Nuclear Experiment, numerical calculations, DETECTOR, Physics, density, DENSITY-DEPENDENCE, SYMMETRY ENERGY, COLLISIONS, FRAGMENTATION, DETECTOR, NEUTRON, PROBE, sezele, 010308 nuclear & particles physics, Elliptic flow, SYMMETRY ENERGY, charged particle, Charged particle, Baryon, n: flow, NEUTRON, Atomic physics, FRAGMENTATION, Nucleon, nucleus: equation of state
Abstract: International audience; The elliptic-flow ratio of neutrons with respect to protons or light complex particles in reactions of heavy ions at pre-relativistic energies has been proposed as an observable sensitive to the strength of the symmetry term of the nuclear equation of state at supra-saturation densities. In the ASY-EOS experiment at the GSI laboratory, flows of neutrons and light charged particles were measured for ^197Au+^197Au collisions at 400 MeV/nucleon. Flow results obtained for the Au+Au system, in comparison with predictions of the UrQMD transport model, confirm the moderately soft to linear density dependence of the symmetry energy deduced from the earlier FOPI-LAND data.
Published: 2016
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31. 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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32. Integration of the GET electronics for the CHIMERA and FARCOS devices

Author: G. Lanzalone, S. Maffesanti, M. Trimarchi, P. Russotto, Francesco Librizzi, G. Cardella, Chiara Guazzoni, E. De Filippo, N. S. Martorana, Michele Papa, S. De Luca, Lucrezia Auditore, Antonio Trifiro, L. Quattrocchi, G. Passaro, S. Pirrone, N. Giudice, G. Sacca, E. V. Pagano, C. Maiolino, F. Rizzo, G. Politi, F. Fichera, D. Sciliberto, G. Salemi, F. Favela, A. Pagano, Fabio Previdi, B. Gnoffo, M. D'Andrea, Andrea Castoldi, L. Acosta, A. Grimaldi, C. Boiano, T. Parsani, and P. Litrico
Subjects: Digital electronics, Coupling, Physics, History, Data processing, 010308 nuclear & particles physics, business.industry, Detector, Electrical engineering, Modular design, 01 natural sciences, Computer Science Applications, Education, Physics and Astronomy (all), Analog signal, Data acquisition, Settore ING-INF/04 - Automatica, 0103 physical sciences, Electronics, 010306 general physics, business
Abstract: A new front-end based on digital GET electronics has been adopted for the readout of the CsI(Tl) detectors of the CHIMERA 4π multi-detector and for the new modular Femtoscopy Array for Correlation and Spectroscopy (FARCOS). It is expected that the coupling of CHIMERA with the FARCOS array, featuring high angular and energy resolution, and the adoption of the new digital electronics will be well suited for improving specific future data analysis, with the full shape storage of the signals, in the field of heavy ion reactions with stable and exotic beams around the Fermi energies domain. Integration of the GET electronics with CHIMERA and FARCOS devices and with the local analog data acquisition will be briefly discussed. We present some results from previous experimental tests and from the first in-beam experiment (Hoyle-Gamma) with the coupled GET+CHIMERA data acquisition.
Published: 2018
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33. Influence of Single Particle Excitations on Barrier Distributions: $^{24}$Mg+$^{90,92}$Zr

Author: D. Dell'Aquila, Antonio Trifiro, L. Quattrocchi, S. De Luca, E. V. Pagano, M. Trimarchi, E. Piasecki, G. Lanzalone, F. Rizzo, A. Pagano, E. De Filippo, N. S. Martorana, B. Gnoffo, Mariano Vigilante, P. Russotto, S. Norella, G. Cardella, Ivano Lombardo, M. Kowalczyk, G. Politi, C. Maiolino, Michele Papa, S. Pirrone, A. Trzcińska, Trzcinska, A., Piasecki, E., Kowalczyk, M., Cardella, G., De Filippo, E., Dell'Aquila, D., De Luca, S., Gnoffo, B., Lanzalone, G., Lombardo, I., Maiolino, C., Martorana, N. S., Norella, S., Pagano, A., Pagano, E. V., Papa, M., Pirrone, S., Politi, G., Quattrocchi, L., Rizzo, F., Russotto, P., Trifiro, A., Trimarchi, M., and Vigilante, M.
Subjects: Physics, Physics and Astronomy (all), 010308 nuclear & particles physics, 0103 physical sciences, General Physics and Astronomy, Particle, Nuclear dynamics, heavy ion collisions, 010306 general physics, 01 natural sciences, Molecular physics
Abstract: We present preliminary results of barrier height distribution measurements for 24Mg+90 ; 92Zr systems. The experiment was performed at LNS INFN in Catania with the CHIMERA detector system and a 24Mg beam accelerated by Tandem MP. The measurements were done at the near-barrier beam energies of 68-88.5 MeV. A discrepancy between experimental results and the predictions of Coupled Channels (CC) calculations was observed. We suggest that this discrepancy may be due to a cumulative effect of many individual weak channels such as non-collective excitations of the target, which cannot be fully implemented in practical CC calculations of a standard form.
Published: 2018
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34. Time sequence and time scale of intermediate mass fragment emission

Author: E. La Guidara, A. Chbihi, G. Vannini, M. Bruno, R. Bougault, M. Trimarchi, G. Cardella, M. L. Sperduto, I. Berceanu, S. Pirrone, M.F. Rivet, K. Schmidt, J.D. Frankland, M. B. Chatterjee, J.P. Wieleczko, B. Borderie, G. Lanzano, W. Zipper, N. Le Neindre, P. Guazzoni, L. Swiderski, E. Galichet, F. Rizzo, A. Trifirò, E. Geraci, Aldo Bonasera, S. Cavallaro, E. Piasecki, D. Guinet, C. Maiolino, S. M. Li, R. Dayras, F. Giustolisi, S. Russo, J. Blicharska, J. Cibor, Mihai Petrovici, F. Amorini, M. Papa, S. Kowalski, Maria Colonna, W. Gawlikowicz, M. D'Agostino, F. Porto, M. Sassi, P. Russotto, J. Wilczynski, Lucrezia Auditore, R. Planeta, G. Politi, Angelo Pagano, A. Grzeszczuk, Mariano Vigilante, Amalia Pop, G. Lanzalone, M. Di Toro, Zhigang Xiao, V. Baran, A. Anzalone, H. Wu, K. Siwek-Wilczyńska, E. De Filippo, I. Skwira, M. Iacono-Manno, E. Rosato, L. Zetta, Z. Majka, J. Brzychczyk, 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), 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 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), E., DE FILLIPPO, A., Pagano, J., Wilczynski, F., Amorini, A., Anzalone, N., Arena, L., Auditore, V., Baran, I., Berceanu, J., Blicharska, J., Brzychczyk, A., Bonasera, B., Borderie, R., Bougault, M., Bruno, G., Cardella, S., Cavallaro, M. B. CHATTERJEE A., Chbihi, J., Cibor, M., Colonna, M., D'Agostino, R., Dayra, M., DI TORO, J. D., Frankland, E., Galichet, W., Gawlikowicz, E., Geraci, F., Giustolisi, A., Grzeszczuk, P., Guazzoni, D., Guinet, M., IACONO MANNO, S., Kowalski, E., LA GUIDARA, G., Lanzan, G., Lanzalone, N., LE NEINDRE, S., Li, C., Maiolino, Z., Majka, M., Papa, M., Petrovici, E., Piasecki, S., Pirrone, R., Planeta, G., Politi, A., Pop, F., Porto, M. F., Rivet, F., Rizzo, Rosato, Elio, S., Russo, P., Russotto, M., Sassi, G., Schmidt, K., SIWEK WILCZYNSKA, I., Skwira, M. L., Sperduto, L., Swiderski, A., Trifir, M., Trimarchi, G., Vannini, Vigilante, Mariano, J. P., Wieleczko, H., Wu, Z., Xiao, L., Zetta, W., Zipper, 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)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), E. De Filippo, A. Pagano, J. Wilczy´nski, F. Amorini, A. Anzalone, L. Auditore, V. Baran, I. Berceanu, J. Blicharska, J. Brzychczyk, A. Bonasera, B. Borderie, R. Bougault, M. Bruno, G. Cardella, S. Cavallaro, M. B. Chatterjee, A. Chbihi, J. Cibor, M. Colonna, M. D Agostino, R. Dayra, M. Di Toro, J. Frankland, E. Galichet, W. Gawlikowicz, E. Geraci, F. Giustolisi, A. Grzeszczuk, P. Guazzoni, D. Guinet, M. Iacono-Manno, S. Kowalski, E. La Guidara, G. Lanzano', G. Lanzalone, N. Le Neindre, S. Li, C. Maiolino, Z. Majka, M. Papa, M. Petrovici, E. Piasecki, S. Pirrone, R. PBaneta, G. Politi, A. Pop, F. Porto, M. F. Rivet, E. Rosato, F. Rizzo, S. Russo, P. Russotto, M. Sassi, K. Schmidt, K. Siwek-Wilczy´nska, I. Skwira, M. L. Sperduto, A. ´ Swiderski, A. Trifiro', M. Trimarchi, G. Vannini, M. Vigilante, J. P. Wieleczko, H. Wu, Z. Xiao, L. Zetta, and W. Zipper.
Subjects: Physics, Nuclear and High Energy Physics, Reaction mechanism, 010308 nuclear & particles physics, Relative velocity, Time sequence, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, 25.70.Mn, 25.70.Pq, Fragmentation (mass spectrometry), 0103 physical sciences, Heavy ion, Ion emission, Atomic physics, 010306 general physics, Nucleon, Ternary operation
Abstract: Matière Nucléaire NIM; Semiperipheral collisions in the $^{124}$Sn+${64}Ni reaction at 35 MeV/nucleon were studied using the forward part of the Charged Heavy Ion Mass and Energy Resolving Array. Nearly completely determined ternary events involving projectilelike fragments (PLF), targetlike fragments (TLF), and intermediate mass fragments (IMF) were selected. A new method of studying the reaction mechanism, focusing on the analysis of the correlations between relative velocities in the IMF+PLF and IMF+TLF subsystems, is proposed. The relative velocity correlations provide information on the time sequence and time scale of the neck fragmentation processes leading to production of IMFs. It is shown that the majority of light IMFs are produced within 40–80 fm/c after the system starts to reseparate. Heavy IMFs are formed at times of about 120 fm/c or later and can be viewed as resulting from two-step (sequential) neck rupture processes.
Published: 2005
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35. Multifragmentation threshold in 93Nb+natMg collisions at 30 MeV/nucleon

Author: M.F. Rivet, S. Pirrone, E. Rosato, M. Papa, N. Le Neindre, M. Pârlog, B. Borderie, F. Porto, D. Guinet, J.D. Frankland, S. Lo Nigro, G. Cardella, Chimera Collaborations, A. Pagano, P. Guazzoni, E. Vient, M. Vigilante, S. Femino, F. Giustolisi, O. Lopez, L. Manduci, F. Rizzo, G. Lanzanó, S. Cavallaro, R. Bougault, J. P. Wieleckzo, L. Sperduto, P. Lautesse, Luisa Zetta, B. Tamain, E. de Filippo, G. Politi, G. Lanzalone, S. Aiello, A. Anzalone, R. Dayras, R. Roy, J. C. Steckmeyer, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Dipartimento di Scienze Fisiche e Sezione (INFN), Istituto Nazionale di Fisica Nucleare (INFN)-Università degli studi di Napoli Federico II, Laboratoire de Physique Nucléaire (IPN), Université Laval [Québec] (ULaval), Laboratori Nazionali del Sud (LNS), Istituto Nazionale di Fisica Nucleare (INFN), Istituto Nazionale di Fisica Nucleare, Sezione di Catania (INFN), Università degli studi di Catania [Catania], Dipartimento di Fisica, Università di Messina, Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN), collaboration INDRA et CHIMERA, 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), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), 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), Istituto Nazionale di Fisica Nucleare (INFN)-University of Naples Federico II = Università degli studi di Napoli Federico II, and Università degli studi di Catania = University of Catania (Unict)
Subjects: Nuclear and High Energy Physics, Particle physics, excitation energy, multifragmentation, Nuclear Theory, FOS: Physical sciences, Binary number, Astrophysics::Cosmology and Extragalactic Astrophysics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, GEMINI, 0103 physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment, 010306 general physics, backtracing, Physics, 010308 nuclear & particles physics, Charge (physics), binary sequential, SMM, 25.70.-z 25.70.Pq 24.10.Pa, Nucleon, Energy (signal processing), Excitation
Abstract: We analyzed the $^{93}Nb$ on $^{nat}Mg$ reaction at 30 MeV/nucleon in the aim of disentangling binary sequential decay and multifragmentation decay close to the energy threshold, i.e. $\simeq 3$ MeV/nucleon. Using the backtracing technique applied to the statistical models GEMINI and SMM we reconstruct simulated charge, mass and excitation energy distributions and compare them to the experimental ones. We show that data are better described by SMM than by GEMINI in agreement with the fact that multifragmentation is responsible for fragment production at excitation energies around 3 MeV/nucleon., 16 pages, 12 figures, 5 tables Soumis \`a Nuclear Physics A
Published: 2008
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36. 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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37. 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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38. Study of cluster structures in $^{10}$Be and $^{16}$C neutron-rich nuclei via break-up reactions

Author: E. De Filippo, N. S. Martorana, L. Francalanza, E. V. Pagano, Triestino Minniti, Luis Acosta, P. Russotto, Elio Rosato, Ivano Lombardo, G. Lanzalone, Amalia Pop, F. Amorini, B. Gnoffo, R. Andolina, A. Pagano, I. Berceanu, Lucrezia Auditore, F. Porto, Giuseppe Verde, G. Cardella, M. Trimarchi, S. Pirrone, M.B. Chatterjiee, Mariano Vigilante, F. Rizzo, G. Politi, A. Grzeszczuk, Michele Papa, D. Dell'Aquila, Antonio Trifiro, L. Quattrocchi, 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), Greco, V., Dell'Aquila, D., Acosta, L., Amorini, F., Andolina, R., Auditore, L., Berceanu, I., Cardella, G., Chatterjiee, M. B., De Filippo, E., Francalanza, L., Gnoffo, B., Grzeszczuk, A., Lanzalone, G., Lombardo, I., Martorana, N., Minniti, T., Pagano, A., Pagano, E. V., Papa, M., Pirrone, S., Politi, G., Pop, A., Porto, F., Quattrocchi, L., Rizzo, F., Rosato, E., Russotto, P., Trifirò, A., Trimarchi, M., Verde, G., Vigilante, M., and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Physics, Nuclear reaction, States, 010308 nuclear & particles physics, QC1-999, Nuclear Structure, Nuclear Clustering, Light nuclei, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Physics and Astronomy (all), medicine.anatomical_structure, Helium-4, 0103 physical sciences, medicine, Neutron, Atomic physics, 010306 general physics, Spectroscopy, Isotopes of beryllium, Isotopes of helium, Nucleus, Excitation, Breakup Reaction
Abstract: International audience; Projectile break-up reactions induced on polyethylene (CH_2) target are used in order to study the spectroscopy of ^10Be and ^16C nuclei. For the present experiment we used ^10Be and ^16C beams delivered by the FRIBs facility at INFN-LNS, and the CHIMERA 4pi multi-detector. ^10Be and ^16C structures are studied via a relative energy analysis of break-up fragments. The ^4He+^6He break-up channel allowed us to study the spectroscopy of ^10Be; in particular we find evidence of a new state in ^10Be at 13.5 MeV excitation energy. The ^16C nucleus is studied via ^6He-^10Be correlation; we find the fingerprint of a possiblestate at about 20.6 MeV
Published: 2015
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39. 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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40. 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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41. Description of current pulses induced by heavy ions in silicon detectors (II)

Author: F. de Oliveira Santos, Elio Rosato, Mariano Vigilante, G. Politi, E. Galichet, E. Vient, L. Lavergne, M. Pârlog, R. Bougault, S. Piantelli, S. Barbey, A. Chbihi, N. Le Neindre, J.D. Frankland, E. Rauly, D. Guinet, B. Borderie, H. Hamrita, Marin Chabot, P. Edelbruck, P. Lautesse, M. F. Rivet, D. Cussol, Bernard Tamain, O. Lopez, G. Martinet, J. Tillier, N. A. Orr, 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 d'Intégration des Systèmes et des Technologies (LIST), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Conservatoire National des Arts et Métiers [CNAM] (CNAM), 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), FAZIA, H., Hamrita, M., Pârlog, B., Borderie, L., Lavergne, N., Le Neindre, M. F., Rivet, S., Barbey, R., Bougault, M., Chabot, A., Chbihi, D., Cussol, F., de Oliveira Santo, P., Edelbruck, J. D., Frankland, E., Galichet, D., Guinet, Lautesse, P. h., O., Lopez, G., Martinet, N. A., Orr, S., Piantelli, J., Tillier, G., Politi, E., Rauly, Rosato, Elio, B., Tamain, E., Vient, Vigilante, Mariano, 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 d'Intégration des Systèmes et des Technologies (LIST (CEA)), Normandie Université (NU)-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), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), 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: Permittivity, Nuclear and High Energy Physics, Silicon, chemistry.chemical_element, Dielectric, Electron, rivelatori al silicio, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Ion, Dielectric permittivity, Electric field, 0103 physical sciences, Pulse shape analysis, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Instrumentation, Physics, 010308 nuclear & particles physics, Carrier pair dissociation, moto dei portatori di carica nei dielettrici, Polarization density, chemistry, Silicon detectors, Charge carrier, Atomic physics, Current pulse
Abstract: Expérience GANIL; Current pulses induced in a silicon detector by 10 different heavy ion species at known energies around 10 AMeV have been sampled in time at high frequency. Their individual average shapes are quite well reproduced by a fit procedure based on our recent charge carrier collection treatment which considers the progressive extraction of the electrons and holes from the high carrier density zone along the ionizing particle track. This region is assumed to present a supplementary dielectric polarization and consequently a disturbe delectric field.The influence of the nature of the heavy ion on the values of the three fit parameters is analyzed.
Published: 2011
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42. Study of resonances produced in light nuclei through two and multi particle correlations

Author: S. De Luca, Luis Acosta, A. Chbihi, G. Lanzalone, Giuseppe Verde, Elio Rosato, A. Anzalone, S. Pirrone, B Gnoffo, Martin Veselsky, Ismael Martel, A. Grzeszczuk, L. Francalanza, P. Russotto, A. Trifirò, E. V. Pagano, E. De Filippo, Mariano Vigilante, Michele Papa, N. S. Martorana, Triestino Minniti, F. Amorini, I. Berceanu, F. Rizzo, L. Quattrocchi, G. Cardella, D. Dell' Aquila, F. Porto, Lucrezia Auditore, S. Norella, G. Politi, A. Pagano, Ivano Lombardo, M. Trimarchi, Quattrocchi, L., Acosta, L., Amorini, F., Anzalone, A., Auditore, L., Berceanu, I., Cardella, G., Chbihi, A., De Filippo, E., De Luca, S., Dell'Aquila, D., Francalanza, L., Gnoffo, B., Grzeszczuk, A., Lanzalone, G., Lombardo, I., Martel, I., Martorana, N. S., Minniti, T., Norella, S., Pagano, A., Pagano, E. V., Papa, M., Pirrone, S., Politi, G., Porto, F., Rizzo, F., Rosato, E., Russotto, P., Trifirò, A., Trimarchi, M., Verde, G., Veselsky, M., Vigilante, M., 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), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: History, Light nucleus, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Light particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], multi particle correlations, 01 natural sciences, Multi particle correlations, Education, Physics and Astronomy (all), Nucleosynthesis, 0103 physical sciences, Cluster (physics), 010306 general physics, Light nuclei, Physics, 010308 nuclear & particles physics, light nuclei, State (functional analysis), Computer Science Applications, Resonances, Excited state, Particle, Atomic physics, α particles, Chemical elements, Alpha-cluster systems, Decay mechanisms, Light particles, Multi-detectors, Multi-particle correlation, Resonant state, Excited states
Abstract: CORRELATION experiment has been performed at INFN-LNS of Catania, using the 4pi multi-detector CHIMERA, with the aim of exploring correlations between two and multi light particle produced in 12C+24Mg collisions at 35 AMeV. Particular attention has been paid to the decay mechanisms of Hoyle state, an excited resonant state of 12C produced via the triple- alfa process and characterized by a pronounced molecular like structure with three-alfa particles. The study of the Hoyle state is essential for nucleosynthesis, but it also represents a clearly isolated state that can be studied as a three-alfa cluster system.
Published: 2017
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43. Exploring reaction mechanisms and their competition in 58Ni+48Ca collisions at E = 25 AMeV

Author: F. Rizzo, Luca Morelli, P. Russotto, E. Geraci, V. L. Kravchuk, G. Lanzalone, Maria Colonna, Sandro Barlini, F. Gramegna, M. Bruno, A. Pagano, R. Bougault, F. Porto, Giovanni Casini, G. Vannini, Maurizio Bini, S. Pirrone, E. La Guidara, U. Abbondanno, Silvia Piantelli, L. Vannucci, G. Politi, L. Francalanza, Paola Marini, J. De Sanctis, M. D'Agostino, A. Giussani, E. De Filippo, G. Cardella, F. Amorini, N. Le Neindre, Alessandro Olmi, Michele Papa, Giacomo Poggi, C. Maiolino, B. Guiot, Istituto Nazionale di Fisica Nucleare, Sezione di Trieste (INFN, Sezione di Trieste), Istituto Nazionale di Fisica Nucleare (INFN), 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), Dipartimento di Energia [Milano] (DENG), and Politecnico di Milano [Milan] (POLIMI)
Subjects: Physics, Reaction mechanism, Photon, 010308 nuclear & particles physics, QC1-999, Observable, Position and momentum space, Fermi energy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, 0103 physical sciences, Tensor, Statistical physics, 010306 general physics, Nuclear Experiment, Event (particle physics), Eigenvalues and eigenvectors
Abstract: OPEN ACCESS; International audience; Latest results concerning the study of central collisions in 58Ni+48Ca reactions at Elab(Ni)=25 AMeV are presented. The experimental data, collected with the CHIMERA 4π device, have been analyzed in order to investigate the competition among different reaction mechanisms for central collisions in the Fermi energy domain. The method adopted to perform the centrality selection refers to the global variable "flow angle", that is related to the event shape in momentum space, as it is determined by the eigenvectors of the experimental kinetic-energy tensor. The main features of the reaction products were explored by using different constraints on some of the relevant observables, such as mass and velocity distributions and their correlations. Much emphasis was devoted to the competition between fusion-evaporation processes with subsequent identification of a heavy residue and a prompt multifragmentation mechanism. The reaction mechanism was simulated in the framework of transport theories (dynamical stochastic BNV calculations, followed by sequential SIMON code) and further comparison with dynamical calculations from transport model (QMD, CoMD) are in progress. Moreover, an extension of this study taking into account for the light particles has been envisaged.
Published: 2014
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44. [Untitled]

Author: J. Fermé, A. C. C. Villari, B. Blank, M. Lewitowicz, J. M. Casandjian, C. Spitaels, A. Gillibert, M. H. Moscatello, F. de Oliveira, F. Sarazin, Marielle Chartier, N. A. Orr, G. Politi, P. Van Isacker, Alinka Lepine-Szily, W. Mittig, M. Mac Cormick, L.K. Fifield, G. Auger, M. Chabert, A. S. Lalleman, H. Savajols, and Michael Wiescher
Subjects: Physics, Nuclear and High Energy Physics, Spectrometer, 010308 nuclear & particles physics, Cyclotron, Condensed Matter Physics, Mass spectrometry, 7. Clean energy, 01 natural sciences, Atomic and Molecular Physics, and Optics, Atomic mass, law.invention, Nuclear physics, law, 0103 physical sciences, Measuring instrument, Nuclear binding energy, Neutron, Physical and Theoretical Chemistry, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: The mass-measurement programme at GANIL aims to measure the masses of heavy nuclei close to the N = Z line which is the ideal region to study neutron-proton pairing. An original direct time-of-flight mass-measurement method was developed at GANIL which uses the CSS2 cyclotron as a high-resolution spectrometer. The masses of ions of A = 68, 76, 80 and 100 have been measured with a precision of a few 10-6. Mass measurements will be performed with the new CIME cyclotron of SPIRAL using a similar method based on the measurement of the phase of the accelerated ions for different radio-frequencies. A recently approved experiment will help develop this new technique and aims to measure the mass of 31 Ar radioactive nuclei with a precision of 10-6.
Published: 2001
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45. Isospin dependence of physical observables in Incomplete Fusion reactions at 25 MeV/nucleon

Author: E. DeFilippo, R. Alba, C. Maiolino, A. Anzalone, G. Politi, I. Berceanu, M. Papa, N. LeNeindre, L. Grassi, A. Pagano, I. Lombardo, F. Porto, S. Cavallaro, Giuseppe Verde, M. B. Chatterjee, P. Russotto, S. Pirrone, E. LaGuidara, E. Geraci, R. Coniglione, F. Rizzo, C. Agodi, Amalia Pop, Paolo Sapienza, Domenico Santonocito, F. Amorini, G. Cardella, G. Giuliani, A. Dipietro, G. Lanzalone, P. Figuera, A. Grzeszczuk, 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), 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: Nuclear reaction, Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Nuclear Theory, Hadron, Elementary particle, Fermion, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Baryon, Isospin, 0103 physical sciences, Nuclear fusion, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: International audience; Isospin dependence of dynamical and thermodynamical physical quantities observed in the reactions 40Ca + 40,48Ca and 40Ca + 46Ti at 25 MeV/nucleon has been analyzed by means of the CHIMERA multi-detector.
Published: 2010
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46. Isoscaling in central $^{124]$Sn + $^{64}$Ni, $^{112}$Sn + $^{58}$Ni collisions at 35 A MeV

Author: A. Chbihi, J.C. Steckmeyer, M. Iacono-Manno, A. Italiano, J. Brzychczyk, S. Kowalski, E. La Guidara, V. Baran, E. Piasecki, M. Papa, G. Vannini, L. Zetta, F. Giustolisi, D. Guinet, Z. Majka, S. Lo Nigro, R. Barnà, J. Cibor, M. Trimarchi, M.F. Rivet, Maria Colonna, S. M. Li, Antonio Trifiro, Amalia Pop, Mariano Vigilante, M. Di Toro, C. Maiolino, G. Lanzanó, P. Guazzoni, R. Bougault, M. Petrovici, D. De Pasquale, F. Porto, Angelo Pagano, S. Cavallaro, A. Bonasera, M. Bartolucci, A. Grzeszczuk, S. Russo, L. Auditore, G. Cardella, S. Pirrone, W. Zipper, N. Le Neindre, M. L. Sperduto, E. Geraci, Bernard Borderie, G. Lanzalone, G. Manfredi, M. D'Agostino, P. Russotto, M. Alderighi, Zhigang Xiao, H. Wu, A. Anzalone, G. Politi, J.P. Wieleczko, M. Bruno, I. Berceanu, G.R. Sechi, V. Simion, Elio Rosato, E. De Filippo, J. Wilczynski, J. Blicharska, T. Paduszynski, 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), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), E. GERACI, M. ALDERIGHI, A. ANZALONE, L. AUDITORE, V. BARAN, R. BARNA', M. BARTOLUCCI, I. BERCEANU, J. BLICHARSKA, A. BONASERA, B. BORDERIE, R. BOUGAULT, BRUNO M., J. BRZYCHCZYK, G. CARDELLA, S. CAVALLARO, A. CHBIHI, J. CIBOR, M. COLONNA, M. D'AGOSTINO, E .DE FILIPPO, D. DE PASQUALE, M. DI TORO, F. GIUSTOLISI, A. GRZESZCZUK, P. GUAZZONI, D. GUINET, M. IACONO-MANNO, A. ITALIANO, S. KOWALSKI, E. LA GUIDARA, G. LANZALONE, G. LANZANO', N. LE NEINDRE, S. LI, S. LO NIGRO, C. MAIOLINO, Z. MAJKA, G. MANFREDI, T. PADUSZYNSKI, A. PAGANO, M. PAPA, M. PETROVICI, E. PIASECKI, S. PIRRONE, G. POLITI, A. POP, F. PORTO, M. F. RIVET, E. ROSATO, S. RUSSO, P. RUSSOTTO, G. SECHI, V. SIMION, M. L. SPERDUTO, J. C. STECKMEYER, A. TRIFIRO, M. TRIMARCHI, G. VANNINI, M. VIGILANTE, J. P. WIELECZKO, J. WILCZYNSKI, H. WU, Z. XIAO, L. ZETTA, W. ZIPPER, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nuclear reaction, Nuclear and High Energy Physics, Phase transition, Heavy ion–nucleus reactions, Nuclear isospin, Nuclear fragmentation, MATERIA NUCLEARE, Nuclear Theory, Hadron, 112Sn(58Ni, FRAMMENTAZIONE NUCLEARE, ISOSPIN, REAZIONI NUCLEARI FRA IONI PESANTI, ISOTOPI, Elementary particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, 25.70.-z, 25.70.Pq, 24.10.Pa, 02.50.Sk, 124Sn(64Ni, Isotopes, 0103 physical sciences, Neutron, Nuclear Experiment, 010306 general physics, Nuclear matter, X), Physics, 010308 nuclear & particles physics, Baryon, Isospin, E=35 A MeV, Nuclear reactions, Atomic physics, Nucleon
Abstract: 124 Sn+ 64 Ni and 112 Sn+ 58 Ni reactions at 35 A MeV incident energy were studied by using the 688 Si–CsI telescopes of the forward part (1°⩽ θ lab ⩽30°) of CHIMERA multi-detector. The most central part, 1% of the total measured cross section was selected by means of a multidimensional analysis of the experimental observables. The detected isotopes of light fragments (3⩽ Z ⩽8) provided information on breakup temperatures of the emitting sources. The space–time structure of these sources was deduced from fragment correlations. An odd–even effect in the fragment production, enhanced by the isospin of the entrance channel, was observed. Freeze-out unbound neutron-to-proton relative densities for both studied reactions have been deduced, indicating for a possible isospin distillation mechanism related to a phenomenon of the liquid–gas phase transition in asymmetric systems.
Published: 2004
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47. Isotope correlations as a probe for freeze-out charaterization: central $^{124}$Sn+$^{64}$Ni, $^{112}$Sn+$^{58}$Ni collisions

Author: S. Pirrone, M. L. Sperduto, Bernard Borderie, Monica Alderighi, M. Di Toro, J. Brzychczyk, P. Russotto, L. Zetta, Z. Majka, S. Lo Nigro, F. Porto, S. Kowalski, Maria Colonna, M. Bartolucci, A. Anzalone, Angelo Pagano, M. Papa, G. Vannini, S. Russo, Amalia Pop, S. Cavallaro, J. Wilczynski, G.R. Sechi, V. Simion, T. Paduszynski, A. Chbihi, D. Guinet, J. Blicharska, J.C. Steckmeyer, E. Piasecki, M. Bruno, G. Cardella, M.F. Rivet, M. Iacono-Manno, Elio Rosato, E. De Filippo, G. Lanzalone, F. Giustolisi, Marina Trimarchi, G. Manfredi, Antonio Trifiro, E. Geraci, P. Guazzoni, Zhigang Xiao, H. Wu, I. Berceanu, Mariano Vigilante, A. Grzeszczuk, G. Lanzanó, R. Bougault, V. Baran, S. M. Li, E. La Guidara, M. Petrovici, J. Cibor, A. Bonasera, W. Zipper, N. Le Neindre, J.P. Wieleczko, C. Maiolino, M. D'Agostino, Lucrezia Auditore, G. Politi, 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)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), E. GERACI, M. ALDERIGHI, A. ANZALONE, L. AUDITORE, V. BARAN, M. BARTOLUCCI, I. BERCEANU, J. BLICHARSKA, A. BONASERA, B. BORDERIE, R. BOUGAULT, BRUNO M., J. BRZYCHCZYK, G. CARDELLA, S. CAVALLARO, A. CHBIHI, J. CIBOR, M. COLONNA, M. D'AGOSTINO, E .DE FILIPPO, M. DI TORO, F. GIUSTOLISI, A. GRZESZCZUK, P. GUAZZONI, D. GUINET, M. IACONO-MANNO, S. KOWALSKI, E. LA GUIDARA, G. LANZALONE, G. LANZANO', N. LE NEINDRE, S. LI, S. LO NIGRO, C. MAIOLINO, Z. MAJKA, G. MANFREDI, T. PADUSZYNSKI, A. PAGANO, M. PAPA, M. PETROVICI, E. PIASECKI, S. PIRRONE, G. POLITI, A. POP, F. PORTO, M. F. RIVET, E. ROSATO, S. RUSSO, P. RUSSOTTO, G. SECHI, V. SIMION, M. L. SPERDUTO, J. C. STECKMEYER, A. TRIFIRO, M. TRIMARCHI, G. VANNINI, M. VIGILANTE, J. P. WIELECZKO, J. WILCZYNSKI, H. WU, Z. XIAO, L. ZETTA, W. ZIPPER, 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)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nuclear reaction, RAPPORTO FRA DENSITA’ FRA NEUTRONI E PROTONI, Nuclear and High Energy Physics, TEMPERATURA E VOLUME DELLA SORGENTE, Proton, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, SORGENTE ECCITATA, 0103 physical sciences, Incident energy, Neutron, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, DIMENSIONE, Physics, Isotope, 010308 nuclear & particles physics, REAZIONI NUCLEARI CENTRALI, RESE DI ISOTOPI, Characterization (materials science), Volume (thermodynamics), Yield (chemistry), Atomic physics
Abstract: 124Sn+64Ni and 112Sn+58Ni reactions at 35 AMeV incident energy were studied with the forward part of CHIMERA multi-detector. The most central collisions were selected by means of a multidimensional analysis. The characteristics of the source formed in the central collisions, as size, temperature and volume, were inspected. The measured isotopes of light fragments (3, 4 pages, Contribution to 8th International Conference on Nucleus-Nucleus Collisions, Moscow 2003
Published: 2003

48. Influence of neutron enrichment on compound system formation and decay in [sup 78]Kr+[sup 40]Ca and [sup 86]Kr+[sup 48]Ca reactions at 10 AMeV

Author: G. Cardella, A. Pagano, Giuseppe Verde, Eric R. Henry, F. Rizzo, P. Russotto, Elio Rosato, S. Pirrone, G. Spadaccini, Ivano Lombardo, G. Ademard, J.D. Frankland, Maria Colonna, D. Lebhertz, K. Mazurek, C. Beck, F. Amorini, E. La Guidara, Jan Toke, P. Lautesse, Eric Bonnet, J.P. Wieleczko, A. Trifiro, D. Loria, A. Chbihi, M. Trimarchi, M. La Commara, N. Le Neindre, M. Quinlann, Lucrezia Auditore, F. Porto, W. U. Schroeder, G. Politi, I. Berceanu, E. De Filippo, E. Geraci, Antonio D'Onofrio, Michele Papa, B. Borderie, E. Piasecki, G. Lanzalone, and Mariano Vigilante
Subjects: Fusion, Silicon, 010308 nuclear & particles physics, Fission, Chemistry, Nuclear Theory, chemistry.chemical_element, Charge (physics), 01 natural sciences, 7. Clean energy, Charged particle, Nuclear physics, Viscosity, Isospin, 0103 physical sciences, Neutron, Atomic physics, Nuclear Experiment, 010306 general physics
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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49. Competition between fusion-evaporation and multifragmentation in central collisions in 58Ni + 48Ca reaction at 25 AMeV

Author: F. Gramegna, E. De Filippo, F. Porto, Giacomo Poggi, Giovanni Casini, V. L. Kravchuk, G. Vannini, L. Francalanza, S. Pirrone, C. Maiolino, G. Lanzalone, M. Bruno, P. Russotto, A. Pagano, F. Rizzo, Paola Marini, F. Amorini, Sandro Barlini, Luca Morelli, B. Guiot, N. Le Neindre, Maurizio Bini, E. Geraci, Silvia Piantelli, G. Cardella, E. La Guidara, U. Abbondanno, R. Bougault, Alessandro Olmi, Michele Papa, G. Politi, M. D'Agostino, A. Giussani, J. De Sanctis, L. Vannucci, 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), 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, History, Fusion, 010308 nuclear & particles physics, Evaporation, Observable, Fermi energy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Kinetic energy, 01 natural sciences, Computer Science Applications, Education, Competition (economics), Nuclear physics, 0103 physical sciences, Tensor, Nuclear Experiment, 010306 general physics, Event (particle physics)
Abstract: International audience; The experimental data concerning the Ni-58+Ca-48 reaction at E-lab(Ni)=25A MeV, collected by the CHIMERA 4 pi device, have been analyzed in order to investigate the competition among different reaction mechanisms for central collisions in the Fermi energy domain. The method adopted to select such central collisions, by means of construction of the kinetic energy tensor and, consequently, the evaluation of the "flow angle" event by event is presented. Some global variables, able to characterize the pattern of central collisions, have been constructed, and the main features of the reaction products are analyzed in terms of some observable, like mass and velocity distributions, as well as their correlations. Much emphasis was devoted to the competition between fusion-evaporation processes with consequent identification of a heavy residue and multifragmentation of a well defined (if any) transient nuclear system formed in central collisions.
Published: 2013
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50. Measurements of sideward flow around the balance energy

Author: D. Doré, M. Parlog, M.F. Rivet, C. Volant, J.L. Laville, J.P. Wieleczko, O. Lopez, Elio Rosato, T. Lefort, J. Colin, Ch.O. Bacri, L. Nalpas, M. Louvel, G. Tabacaru, A. M. Maskay, D. Durand, R. Legrain, G. Auger, R. Bougault, J.L. Charvet, M. Stern, Bernard Borderie, Jean Péter, A.D. Nguyen, P. Lautesse, F. Bocage, S. Salou, A. Le Fèvre, A. Demeyer, D. Gourio, D. Cussol, E. De Filippo, R. Dayras, J.F. Lecolley, E. Plagnol, E. Genouin-Duhamel, L. Tassan-Got, Marie Germain, G. Politi, N. Le Neindre, E. Gerlic, A. Chbihi, T. Reposeur, J.C. Steckmeyer, J.D. Frankland, E. Galichet, O. Tirel, Ph. Buchet, D. Guinet, Ph. Eudes, A. Rahmani, E. Vient, B. Tamain, F. Saint-Laurent, R. Brou, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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 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), INDRA, Normandie Université (NU)-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 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), 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), D., Cussol, T., Lefort, J., Pter, G., Auger, Bacri, C. H. O., F., Bocage, B., Borderie, R., Bougault, R., Brou, P., Buchet, J. L., Charvet, A., Chbihi, J., Colin, R., Dayra, A., Demeyer, D., Dor, D., Durand, P., Eude, E., DE FILIPPO, J. D., Frankland, E., Galichet, E., GENOUIN DUHAMEL, E., Gerlic, M., Germain, D., Gourio, D., Guinet, P., Lautesse, J. L., Laville, J. F., Lecolley, A., LE FVRE, R., Legrain, N., LE NEINDRE, O., Lopez, M., Louvel, A. M., Maskay, L., Nalpa, A. D., Nguyen, M., Parlog, E., Plagnol, G., Politi, A., Rahmani, T., Rposeur, M. F., Rivet, Rosato, Elio, F., SAINT LAURENT, S., Salou, J. C., Steckmeyer, M., Stern, G., Tabacaru, B., Tamain, L., TASSAN GOT, O., Tirel, E., Vient, and C. VOLANT E. J. P., Wielezcko
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), 010308 nuclear & particles physics, Plane (geometry), Flow (psychology), FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Reconstruction method, Charged particle, 0103 physical sciences, Incident energy, Nuclear Experiment (nucl-ex), Atomic physics, Nuclear Experiment, 010306 general physics, Balance energy
Abstract: Sideward flow values have been determined with the INDRA multidetector for Ar+Ni, Ni+Ni and Xe+Sn systems studied at GANIL in the 30 to 100 A.MeV incident energy range. The balance energies found for Ar+Ni and Ni+Ni systems are in agreement with previous experimental results and theoretical calculations. Negative sideward flow values have been measured. The possible origins of such negative values are discussed. They could result from a more important contribution of evaporated particles with respect to the contribution of promptly emitted particles at mid-rapidity. But effects induced by the methods used to reconstruct the reaction plane cannot be totally excluded. Complete tests of these methods are presented and the origins of the ``auto-correlation'' effect have been traced back. For heavy fragments, the observed negative flow values seem to be mainly due to the reaction plane reconstruction methods. For light charged particles, these negative values could result from the dynamics of the collisions and from the reaction plane reconstruction methods as well. These effects have to be taken into account when comparisons with theoretical calculations are done., Comment: 27 pages, 15 figures
Published: 2002
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