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3 results on '"R. Bougault"'

1. Isospin transport and reaction mechanism in nuclear reactions in the range 20–40 MeV/n

Author

T. Marchi, Diego Gruyer, Sandro Barlini, Giacomo Poggi, E. Vient, M. Cinausero, Maurizio Bini, Tomasz Kozik, A. Chibhi, Eric Bonnet, M.F. Rivet, Luca Morelli, F. Gramegna, J.D. Frankland, Alessandro Olmi, Giovanni Casini, D. Fabris, Gabriele Pasquali, R. Bougault, Silvia Piantelli, M. Bruno, Andrea Stefanini, B. Borderie, Simone Valdré, G. Pastore, M. Parlog, Mariano Vigilante, Elio Rosato, N. Le Neindre, M. Degerlier, T. Twaróg, O. Lopez, Barlini, S., Piantelli, S., Casini, G., Olmi, A., Bini, M., Pasquali, G., Poggi, G., Stefanini, A. A., Bougault, R., Bonnet, E., Borderie, B., Chibhi, A., Frankland, J. D., Gruyer, D., Lopez, O., Le Neindre, N., Parlog, M., Rivet, M. F., Vient, E., Rosato, E., Vigilante, M., Bruno, M., Marchi, T., Morelli, L., Cinausero, M., Degerlier, M., Gramegna, F., Kozik, T., Twarog, T., Fabris, D., Valdré, S., Pastore, G., 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 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), 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), 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, Particle physics, Range (particle radiation), education.field_of_study, 010308 nuclear & particles physics, Population, Degrees of freedom (statistics), Charge (physics), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Measure (mathematics), Symmetry (physics), Nuclear physics, Physics and Astronomy (all), Isospin, 0103 physical sciences, 010306 general physics, education
Abstract

International audience; In recent years, many efforts have been devoted to the investigation of the isospin degree of freedom in nuclear reactions. Comparing systems involving partners with different N/Z, it has been possible to investigate the isospin transport process and its influence on the final products population. This can be then related to the symmetry energy term of the nuclear EOS. From the experimental point of view, this task requires detectors able to measure both charge and mass of the emitted products, in the widest possible range of energy and size of the fragments. With this objective, the FAZIA and GARFIELD+RCo apparatus have been used with success in some recent experiments.

Published
2015
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2. Bimodality: a robust signature of a nuclear matter phase transition

Author

M. Pichon, R. Bougault, O. Lopez, Aladin collaborations, and B. Tamain

Subjects
Quantum phase transition, Phase transition, Intermediate energy, Chemistry, Atomic physics, Nuclear Experiment, Nuclear matter, Signature (topology), Molecular physics, Excitation, Bimodality, Sign (mathematics)
Abstract

Bimodality is observed on the size of the heaviest released fragment for semi‐peripheral heavy ion induced reactions in the intermediate energy domain. From lattice‐gas calculations, this signal can sign a phase transition even if the system has not reached a complete equilibrium. It is shown from the data that it is correlated with other possible phase transition signals. The two bimodality solutions correspond to different excitation energies and to similar temperatures as expected if bimodality is due to a liquid‐gas phase transition.

Published
2007
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3. Transverse velocity scaling in Au+Au midrapidity emissions

Author

B. Zwieglinski, L. Nalpas, R. Legrain, P. Lautesse, C. Leduc, Ch.O. Bacri, C. Sfienti, D. Gourio, Elio Rosato, R. Bougault, Bertrand Bouriquet, F. Lavaud, A. Saija, C. Volant, J.L. Laville, W. Trautmann, Sylvie Hudan, M.L. Begemann-Blaich, Gerard Auger, D. Durand, U. Lynen, N. Bellaize, E. Vient, E. Plagnol, J.L. Charvet, Mariano Vigilante, B. Borderie, A. S. Botvina, F. Bocage, R. Dayras, G. Tǎbǎcaru, Aladin Collaborations, J.C. Steckmeyer, C. Schwarz, Diane Doré, H. Orth, J.D. Frankland, J. Łukasik, B. Hurst, E. Galichet, W. F. J. Müller, K. Turzo, B. Tamain, A. Trzcinski, A. Chbihi, A. Le Fèvre, O. Lopez, R. Bittiger, Ph. Buchet, and D. Guinet

Subjects
Nuclear physics, Physics, Transverse plane, Range (particle radiation), Photon, Projectile, Observable, Atomic physics, Impact parameter, Nuclear Experiment, Scaling, Charged particle
Abstract

The emission of intermediate-mass fragments in collisions of 197Au on 197Au was systematically studied over the range of incident energies from 40 to 150 A MeV using the 4π-multidetector INDRA and beams from the heavy-ion synchrotron SIS at GSI Darmstadt. The analysis was performed as a function of incident energy and of impact parameter, defined through the total transverse energy of light charged particles (Etrans 12, Z⩽2). This observable was found to scale linearly with the collision energy up to a certain limit above which it saturates. Strong forward-backward asymmetries in the emission pattern with respect to the rapidities of the projectile and target residua were observed. Their possible relation to equilibration is discussed and interpreted in the framework of molecular dynamics and statistical multifragmentation models. Transverse velocities at midrapidity for peripheral collisions were found to show a surprisingly weak dependence on the incident energy. On the contrary, transverse velocities a...

Published
2002
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