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51. 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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52. 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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53. 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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54. 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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55. The ASY-EOS experiment at GSI: Constraining the symmetry energy at supra-saturation densities

Author

P. Russotto, M. Chartier, M.D. Cozma, E. De Filippo, A. Le Fèvre, S. Gannon, I. Gašparić, M. Kiš, S. Kupny, Y. Leifels, R.C. Lemmon, Q. Li, J. Łukasik, P. Marini, P. Pawłowski, W. Trautmann, L. Acosta, M. Adamczyk, A. Al-Ajlan, M. Al-Garawi, S. Al-Homaidhi, F. Amorini, L. Auditore, T. Aumann, Y. Ayyad, V. Baran, Z. Basrak, R. Bassini, J. Benlliure, C. Boiano, M. Boisjoli, K. Boretzky, J. Brzychczyk, A. Budzanowski, G. Cardella, P. Cammarata, Z. Chajecki, A. Chbihi, M. Colonna, B. Czech, M. Di Toro, M. Famiano, V. Greco, L. Grassi, C. Guazzoni, P. Guazzoni, M. Heil, L. Heilborn, R. Introzzi, T. Isobe, K. Kezzar, A. Krasznahorkay, N. Kurz, E. La Guidara, G. Lanzalone, P. Lasko, I. Lombardo, W.G. Lynch, Z. Matthews, L. May, T. Minniti, M. Mostazo, A. Pagano, M. Papa, S. Pirrone, R. Pleskac, G. Politi, F. Porto, R. Reifarth, W. Reisdorf, F. Riccio, F. Rizzo, E. Rosato, D. Rossi, S. Santoro, H. Simon, I. Skwirczynska, Z. Sosin, L. Stuhl, A. Trifirò, M. Trimarchi, M.B. Tsang, G. Verde, M. Veselsky, M. Vigilante, A. Wieloch, P. Wigg, H.H. Wolter, P. Wu, S. Yennello, P. Zambon, L. Zetta, M. Zoric, Borderie, B., Russotto, P., Chartier, M., Cozma, M. D., De Filippo, E., Le Fever, A., Gannon, S., Gǎsparíc, I., Kǐs, M., Kupny, S., Leifels, Y., Lemmon, R. C., Li, Q., Lukasik, J., Marini, P., Pawlowski, 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., Greco, V., 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., Trifiro, 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., Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics and Astronomy (all), sezele, Physics, QC1-999, Nuclear Theory, ddc:530, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; The elliptic-flow ratio of neutrons with respect to protons or lightcomplex particles in reactions of heavy ions at pre-relativistic energieshas been proposed as an observable sensitive to the strength of thesymmetry term of the nuclear equation of state at supra-saturationdensities. In the ASY-EOS experiment at the GSI laboratory, flows ofneutrons and light charged particles were measured for 197Au+197Au,96Zr+96Zr and 96Ru+96Ru collisions at 400 MeV/nucleon with theLarge Area Neutron Detector LAND as part of a setup with severaladditional detection systems used for the event characterization. Flowresults obtained for the Au+Au system, in comparison with predictionsof the UrQMD transport model, confirm the moderately soft to lineardensity dependence of the symmetry energy deduced from the earlierFOPI-LAND data.

Published
2015
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56. ASY-EOS experiment at GSI

Author

S. Pirrone, Riccardo Introzzi, D. Loria, J. Brzychczyk, F. Amorini, Chiara Guazzoni, Marielle Chartier, Triestino Minniti, M. Trimarchi, A. Budzanowski, H. H. Wolter, L. W. May, M. Di Toro, M. Al-Garawi, M. Zoric, B. Tsang, B. Czech, L. Grassi, Z. Chajecki, E. La Guidara, C. Boisjoli, P. Z. Wu, Matthias Heil, Rene Reifarth, G. Politi, Yassid Ayyad, Martin Veselsky, K. Boretzky, Paola Marini, G. Cardella, F. Porto, P. Guazzoni, F. Riccio, Michael Famiano, J. Lukasik, Maria Colonna, Vincenzo Greco, Yvonne Leifels, A. Gašsparić, A. Trifirò, E. Geraci, I. Skwirczyńska, W. Reisdorf, L. Acosta, P. Zambon, A. Le Fèvre, Lauren Heilborn, Michele Papa, M. Adamczyk, Lucrezia Auditore, P. Cammarata, Thomas Aumann, Mihai Petrovici, Z. Basrak, A. Chbihi, Ivano Lombardo, Piotr Pawłowski, S. Cavallaro, Z. Matthews, M. Mostazo, P. Russotto, J. Wilczyński, S. Santoro, P. Lasko, Tadaaki Isobe, F. Rizzo, V. Baran, D. M. Rossi, Zbigniew Sosin, Qingfeng Li, Mariano Vigilante, W. Trautmann, G. Lanzalone, W. G. Lynch, M. Kiš, J. Benlliure, Elio Rosato, S. Al-Homaidhi, C. Boiano, A. Wieloch, Angelo Pagano, E. De Filippo, Abdulrahman Alajlan, Roy Crawford Lemmon, S. Kupny, Sherry Yennello, N. Kurz, L. Zetta, Herbert A. Simon, P. Wigg, K. Kezzar, Giuseppe Verde, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), J.D Frankland, A. Pagano, S. Pirrone, M.-F Rivet, F. Rizzo, J.D.Frankland, A.Pagano, S.Pirrone, m.F.Rivet, F.Rizzo, P., Russotto, L., Acosta, M., Adamczyk, A., Al Ajlan, M., Al Garawi, S., Al Homaidhi, F., Amorini, L., Auditore, T., Aumann, Y., Ayyad, V., Baran, Z., Basrak, J., Benlliure, C., Boiano, C., Boisjoli, K., Boretzky, J., Brzychczyk, A., Budzanowski, G., Cardella, P., Cammarata, S., Cavallaro, Z., Chajecki, M., Chartier, A., Chbihi, M., Colonna, B., Czech, E., De Filippo, M., Di Toro, M., Famiano, A., Le Fevre, A., Ga??spari??, E., Geraci, L., Grassi, V., Greco, C., Guazzoni, P., Guazzoni, M., Heil, L., Heilborn, R., Introzzi, T., Isobe, K., Kezzar, M., Ki??, S., Kupny, N., Kurz, E., La Guidara, G., Lanzalone, P., Lasko, Y., Leifel, R., Lemmon, Q., Li, Lombardo, Ivano, D., Loria, J., Lukasik, W. G., Lynch, P., Marini, Z., Matthew, L., May, T., Minniti, M., Mostazo, A., Pagano, M., Papa, P., Pawlowski, M., Petrovici, S., Pirrone, G., Politi, F., Porto, R., Reifarth, W., Reisdorf, F., Riccio, F., Rizzo, Rosato, Elio, D., Rossi, S., Santoro, H., Simon, I., Skwirczynska, Z., Sosin, W., Trautmann, A., Trifirò, M., Trimarchi, B., Tsang, M., Veselsky, G., Verde, Vigilante, Mariano, A., Wieloch, P., Wigg, J., Wilczynski, H. H., Wolter, P., Wu, S., Yennello, P., Zambon, L., Zetta, M., Zoric, Russotto, P., 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., Benlliure, J., Boiano, C., Boisjoli, M., Boretzky, K., Brzychczyk, J., Budzanowski, A., Cardella, G., Cammarata, P., Cavallaro, S., Chajecki, Z., Chartier, M., Chbihi, A., Colonna, M., Czech, B., De Filippo, E., Di Toro, M., Famiano, M., Le Fevre, A., Gašparić, I., Geraci, E., Grassi, L., Greco, V., Guazzoni, C., Guazzoni, P., Heil, M., Heilborn, L., Introzzi, R., Isobe, T., Kezzar, K., Kiš, M., Kupny, S., Kurz, N., La Guidara, E., Lanzalone, G., Lasko, P., Leifels, Y., Lemmon, R., Li, Q., Lombardo, I., Loria, D., Lukasik, J., Lynch, W., Marini, P., Matthews, Z., May, L., Minniti, T., Mostazo, M., Pagano, A., Papa, M., Pawlowski, P., Petrovici, M., Pirrone, S., Politi, G., Porto, F., Reifarth, R., Reisdorf, W., Riccio, F., Rizzo, F., Rosato, E., Rossi, D., Santoro, S., Simon, H., Skwirczynska, I., Sosin, Z., Trautmann, W., Trifirò, A., Trimarchi, M., Tsang, B., Veselsky, M., Verde, G., Vigilante, M., Wieloch, A., Wigg, P., Wilczynski, J., Wolter, H., Wu, P., Yennello, S., Zambon, P., Zetta, L., and Zoric, M.

Subjects
Physics, sezele, QC1-999, Nuclear Theory, symmetry energy, Observable, Nuclear equation of state, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nuclear equation of state, Symmetry (physics), Term (time), Nuclear physics, Physics and Astronomy (all), nucleus-nucleus collisions, Neutron, Nucleon, Nuclear Experiment
Abstract

The elliptic-flow ratio of neutrons with respect to protons in reactions of neutron rich Heavy-Ion at intermediate energies has been recently proposed as an observable sensitive to the strength of the symmetry term in the nuclear equation of state (EOS) at supra-saturation densities. The recent results obtained from the existing FOPI/LAND data for 197Au+197Au collisions at 400 MeV/nucleon in comparison with the UrQMD model allowed a first estimate of the symmetry term of the EOS but suffer from a considerable statistical uncertainty. In order to obtain an improved data set for Au+Au collisions and to extend the study to other systems, a new experiment was carried out at the GSI laboratory by the ASY-EOS collaboration in May 2011. © Owned by the authors, 2012.

Published
2012
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57. Proton radii of (12-17)B define a thick neutron surface in ¹⁷B.

Author

Estradé A, Kanungo R, Horiuchi W, Ameil F, Atkinson J, Ayyad Y, Cortina-Gil D, Dillmann I, Evdokimov A, Farinon F, Geissel H, Guastalla G, Janik R, Kimura M, Knöbel R, Kurcewicz J, Litvinov YA, Marta M, Mostazo M, Mukha I, Nociforo C, Ong HJ, Pietri S, Prochazka A, Scheidenberger C, Sitar B, Strmen P, Suzuki Y, Takechi M, Tanaka J, Tanihata I, Terashima S, Vargas J, Weick H, and Winfield JS

Abstract

The first determination of radii of point proton distribution (proton radii) of (12-17)B from charge-changing cross sections (σ(CC)) measurements at the FRS, GSI, Darmstadt is reported. The proton radii are deduced from a finite-range Glauber model analysis of the σ(CC). The radii show an increase from ¹³B to ¹⁷B and are consistent with predictions from the antisymmetrized molecular dynamics model for the neutron-rich nuclei. The measurements show the existence of a thick neutron surface with neutron-proton radius difference of 0.51(0.11) fm in ¹⁷B.

Published
2014
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