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11 results on '"G, Politi"'

1. Isospin equilibration phenomenon and mid-rapidity IMF emission in the 48Ca +27 Al 40 MeV/nucleon collision

Author

P. Russotto, L. Acosta, E. V. Pagano, N. S. Martorana, C. Maiolino, S. Pirrone, F. Favela, G. Lanzalone, A. Pagano, F. Rizzo, E. De Filippo, Michele Papa, B. Gnoffo, G. Cardella, E. Geraci, Antonio Trifiro, M. Trimarchi, L. Quattrocchi, and G. Politi

Subjects
Physics, History, Different densities, Intermediate mass fragments, Isospin, Measurements of, Mid-rapidity, Model calculations, Symmetry energies, Collision, Computer Science Applications, Education, Nuclear physics, Rapidity, Nucleon
Abstract

It is discussed the dynamics of Isospin equilibration in reactions involving the production of Intermediate Mass Fragment (IMF) in the mid-rapidity region. The investigation proceeds through the measurements of the reduced value of the total dipolar signal obtained from the measured velocities and charges of all fragments produced in the collision 48 Ca +27 Al at 40 MeV/nucleon. Preliminary experimental results, along with the comparison with CoMD-III model calculations for different density functionals related to the symmetry energy, are presented.

Published
2020

2. 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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3. Elastic scattering studies of 16C at 50 MeV/A on proton and deuteron targets with the CHIMERA multidetector at INFN-LNS

Author

G. Lanzalone, Elio Rosato, F. Amorini, L. Grassi, S. Santoro, M. Trimarchi, A. Grzeszczuk, Triestino Minniti, G. Cardella, S. Lo Nigro, E. De Filippo, A. Pagano, D. Loria, Mariano Vigilante, A. Anzalone, Antonio Trifiro, F. Porto, Giuseppe Verde, Michele Papa, S. Pirrone, C. Maiolino, E. Geraci, E. La Guidara, Lucrezia Auditore, G. Politi, M B Chaatterjee, I. Lombardo, P. Russotto, F. Rizzo, C. Agodi, S.J.Freeman, L., Grassi, C., Agodi, F., Amorini, A., Anzalone, L., Auditore, G., Cardella, M. B., Chatterjee, E., De Filippo, E., Geraci, A. G. r. z. e. s. z. c. z. u., K., G., Lanzalone, Lombardo, Ivano, S., Lo Nigro, D., Loria, C., Maiolino, T., Minniti, A., Pagano, E. V., Pagano, M., Papa, S., Pirrone, G., Politi, F., Porto, F., Rizzo, Rosato, Elio, P., Russotto, S., Santoro, A., Trifiró, M., Trimarchi, G., Verde, Vigilante, Mariano, Grassi, L., Agodi, C., Amorini, F., Anzalone, A., Auditore, L., Cardella, G., Chaatterjee, M., Filippo, E., Geraci, E., Grzeszczuk, A., Guidara, E., Lanzalone, G., Lombardo, I., Nigro, S., Loria, D., Maiolino, C., Minniti, T., Pagano, A., Papa, M., Pirrone, S., Politi, G., Porto, F., Rizzo, F., Rosato, E., Russotto, P., Santoro, S., Trifirò, A., Trimarchi, M., Verde, G., and Vigilante, M.

Subjects
Radioactive ion beams, Elastic scattering, Physics, radioactive ion beam, History, Physics::Medical Physics, elastic scattering, tagging, Coincidence, Computer Science Applications, Education, Nuclear physics, Physics and Astronomy (all), Deuterium, Fragmentation (mass spectrometry), Physics::Accelerator Physics, Heavy ion, Atomic physics, Nuclear Experiment
Abstract

At the Laboratori Nazionali del Sud (LNS) in Catania (Italy), light radioactive ion beams have been produced through the In Flight Fragmentation method, using 18O and 13C at 55 MeV/A as primary beams impinging on a 9Be production target. Elastic scattering angular distributions of 16C+p and 16C+d at 50 MeV/A, 10Be+p at 56 MeV/A and 13B+d at 52 MeV/A systems were measured by using the CHIMERA (Charge Heavy Ion Mass and Energy Resolving Array) multidetector and kinematical coincidence technique. The experimental data are fitted by using the optical model. © Published under licence by IOP Publishing Ltd.

Published
2012

4. 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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5. N/Z effects on dynamics of Ca+Ca collisions at 25 MeV/nucleon

Author

G. Lanzalone, S. Cavallaro, G. Cardella, F. Porto, Giuseppe Verde, E. Laguidara, P. Russotto, Mariano Vigilante, Ji-Youn Han, C. Agodi, S. Pirrone, E. DeFilippo, I. Berceanu, A. Anzalone, L. Acosta, E. Geraci, G. Giuliani, F. Rizzo, C. Maiolino, Antonio Trifiro, Michele Papa, F. Amorini, Ivano Lombardo, M. Trimarchi, D. Loria, A. Pagano, L. Grassi, M. B. Chatterjee, Lucrezia Auditore, and G. Politi

Subjects
Nuclear reaction, Physics, History, Proton, Nuclear Theory, Hadron, Elementary particle, Fermion, Computer Science Applications, Education, Nuclear physics, Baryon, Neutron, Atomic physics, Nuclear Experiment, Nucleon
Abstract

Semi-central events of collisions 40,48Ca +40,48 Ca at 25 MeV/nucleon have been investigated by means of the Chimera multi-detector array. We find that the competition between evaporation residue and two or more fragment emission is regulated in a strong way by the neutron to proton ratio of the total reaction system. Comparisons of experimental data and Constrained Molecular Dynamics model calculations allow to obtain information about the behavior of the symmetry energy of the nuclear Equation of State.

Published
2012
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6. Probing the equation of state of asymmetric nuclear matter with isospin diffusion and stopping in heavy-ion collisions

Author

Hang Liu, Pawel Danielewicz, P. Russotto, L. Andronenko, E. Galichet, M. Papa, C. Maiolino, M. B. Tsang, Angelo Pagano, G. Cardella, F. Rizzo, M. Andronenko, Yuzi Zhang, S. Piantelli, G. Lanzalone, M. Chatterje, F. Porto, E. De Filippo, Z. Y. Sun, Giuseppe Verde, S. Pirrone, Domenico Santonocito, P. Dinh, F. Amorini, W. G. Lynch, Hui Hua, E. Geraci, F. Lu, E. La Guidara, and G. Politi

Subjects
Physics, History, Equation of state, Nuclear Theory, Nuclear matter, Symmetry (physics), Computer Science Applications, Education, Nuclear physics, Isospin, Neutron, Atomic physics, Chemical equilibrium, Diffusion (business), Nuclear Experiment, Nucleon
Abstract

Results from the study of isospin asymmetric Sn+Sn collisions at E/A=35 MeV and 50 MeV, collected with the LASSA and the Chimera detectors at the NSCL of MSU, respectively, are shown. The diffusion of neutrons and protons between projectiles and targets with different N/Z-asymmetries is studied by means of imbalance ratios measurements. The obtained results and their comparison to transport model simulations provide constraints on the density dependence of the symmetry energy. The systematic study of these phenomena at different impact parameters also allows us to explore isospin transparency and stopping phenomena in more central collisions, with important implications about the attainment of chemical equilibrium in central collisions at 35 MeV/nucleon.

Published
2011
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8. Study of resonances produced in Heavy Ion Collisions.

Author

L. Quattrocchi, L. Acosta, L. Auditore, G. Cardella, A. Chbihi, E. De Filippo, F. Favela, B. Gnoffo, G. Lanzalone, I. Martel, N. S. Martorana, A. Pagano, E.V. Pagano, M. Papa, S. Pirrone, G. Politi, F. Porto, F. Rizzo, P. Russotto, and A. Trifirò

Published
2018
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