Search

Your search keyword '"Turzo K"' showing total 6 results
Start Over Author "Turzo K" Topic nuclear theory
6 results on '"Turzo K"'

1. Bimodality - a general feature of heavy ion reactions

Author

Fevre, A. Le, Aichelin, J., Hartnack, C., Lukasik, J., Mueller, W. F. J., Orth, H., Schwarz, C., Sfienti, C., Trautmann, W., Turzo, K., Zwieglinski, B., Chbihi, A., Frankland, J. D., Wieleczko, J. P., and Vigilante, M.

Subjects
Nuclear Theory
Abstract

Recently, is has been observed that events with the {\it same} total transverse energy of light charged particles (LCP) in the quasi target region, $E_{\perp 12}^{QT}$, show two quite distinct reaction scenarios in the projectile domain: multifragmentation and residue production. This phenomenon has been dubbed "bimodality". Using Quantum Molecular Dynamics calculations we demonstrate that this observation is very general. It appears in collisions of all symmetric systems larger than Ca and at beam energies between 50 A.MeV and 600 A.MeV and is due to large fluctuations of the impact parameter for a given $E_{\perp 12}^{QT}$. Investigating in detail the $E_{\perp 12}^{QT}$ bin in which both scenarios are present, we find that neither the average fragment momenta nor the average transverse and longitudinal energies of fragments show the behavior expected from a system in statistical equilibrium, in experiment as well as in QMD simulations. On the contrary, the experimental as well as the theoretical results point towards a fast process. This observation questions the conjecture that the observed bimodality is due to the coexistence of 2 phases at a given temperature in finite systems., Comment: accepted PRC

Published
2009
Full Text
View/download PDF

2. Transition from participant to spectator fragmentation in Au+Au reaction between 60 AMeV and 150 AMeV

Author

Zbiri, K., LeFèvre, A., Aichelin, J., Łukasik, J., Reisdorf, W., Gulminelli, F., Lynen, U., Müller, W. F. J., Orth, H., Schwarz, C., Sfienti, C., Trautmann, W., Turzó, K., Zwiegliński, B., Auger, G., Charvet, J. L., Chbihi, A., Dayras, R., Durand, D., Frankland, J. D., Legrain, R., Neindre, N. Le, Lopez, O., Nalpas, L., Parlog, M., Rivet, M. F., Rosato, E., Vient, E., Vigilante, M., Volant, C., and Wieleczko, J. P.

Subjects
Nuclear Theory
Abstract

Using the quantum molecular dynamics approach, we analyze the results of the recent INDRA Au+Au experiments at GSI in the energy range between 60 AMeV and 150 AMeV. It turns out that in this energy region the transition toward a participant-spectator scenario takes place. The large Au+Au system displays in the simulations as in the experiment simultaneously dynamical and statistical behavior which we analyze in detail: The composition of fragments close to midrapidity follows statistical laws and the system shows bi-modality, i.e. a sudden transition between different fragmentation pattern as a function of the centrality as expected for a phase transition. The fragment spectra at small and large rapidities, on the other hand, are determined by dynamics and the system as a whole does not come to equilibrium, an observation which is confirmed by FOPI experiments for the same system., Comment: published version

Published
2006
Full Text
View/download PDF

3. Directed and elliptic flow in $^{197}$Au+$^{197}$Au at intermediate energies

Author

Lukasik, J., Auger, G., Begemann-Blaich, M. L., Bellaize, N., Bittiger, R., Bocage, F., Borderie, B., Bougault, R., Bouriquet, B., Charvet, J. L., Chbihi, A., Dayras, R., Durand, D., Frankland, J.D., Galichet, E., Gourio, D., Guinet, D., Hudan, S., Lautesse, P., Lavaud, F., Fevre, A. Le, Legrain, R., Lopez, O., Lynen, U., Mueller, W. F. J., Nalpas, L., Orth, H., Plagnol, E., Rosato, E., Saija, A., Schwarz, C., Sfienti, C., Tamain, B., Trautmann, W., Trzcinski, A., Turzo, K., Vient, E., Vigilante, M., Volant, C., Zwieglinski, B., 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), 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), 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), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), 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), ALADIN, INDRA, Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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)-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), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Istituto Nazionale di Fisica Nucleare, Sezione di Catania (INFN), Università degli studi di Catania [Catania], Istituto Nazionale di Fisica Nucleare, Sezione di Napoli (INFN, Sezione di Napoli), Istituto Nazionale di Fisica Nucleare (INFN), This work was supported by the European Community under contract ERBFMGECT950083, J., Lukasik, G., Auger, M. L., BEGEMANN BLAICH, N., Bellaize, R., Bittiger, F., Bocage, B., Borderie, R., Bougault, B., BOU RIQUET, J. L., Charvet, A., Chbihi, R., Dayra, D., Durand, J. D., Frankland, E., Galichet, D., Gourio, D., Guinet, S., Hudan, P., Lautesse, F., Lavaud, A., LE FVRE, R., Legrain, O., Lopez, U., Lynen, W. F. J., Mller, L., Nalpa, H., Orth, E., Plagnol, Rosato, Elio, A., Saija, C., Schwarz, C., Sfienti, B., Tamain, W., Trauttmann, A., Trzcinski, K., Turz, E., Vient, Vigilante, Mariano, C. VOLANT AND B., Zwieglinski, B., Bouriquet, and Università degli studi di Catania = University of Catania (Unict)

Subjects
Angular momentum, Nuclear and High Energy Physics, Hadron, Nuclear Theory, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Nuclear physics, Molecular dynamics, symmetric heavy ion collision, PACS: 25.70Mn, 25.70.Pq, 25.40.Sc, 0103 physical sciences, directed flow, 010306 general physics, Nuclear Experiment, squeeze-out, Nuclear Physics, Physics, Excitation function, 010308 nuclear & particles physics, elliptic flow, Elliptic flow, Flow (mathematics), Atomic physics, Nucleon, Sign (mathematics)
Abstract

Directed and elliptic flow for the $^{197}$Au+$^{197}$Au system at incident energies between 40 and 150 MeV per nucleon has been measured using the INDRA 4$\pi$ multi-detector. For semi-central collisions, the excitation function of elliptic flow shows a transition from in-plane to out-of-plane emission at around 100 MeV per nucleon. The directed flow changes sign at a bombarding energy between 50 and 60 MeV per nucleon and remains negative at lower energies. Molecular dynamics calculations (CHIMERA) indicate sensitivity of the global squeeze-out transition on the $\sigma$ and demonstrate the importance of angular momentum conservation in transport codes at low energies. The conditions for the appearance and possible origins of negative flow are discussed.

Published
2005

4. Multiplicity correlations of intermediate-mass fragments with pions and fast protons in C-12+Au-197

Author

Turzo, K., Auger, G., and Begemann-Blaich, M.

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

Low-energy pi(+) (E-pi less than or similar to 35 MeV) from C-12 + Au-197 collisions at incident energies from 300 to 1800 MeV per nucleon were detected with the Si-Si(Li)-CsI(Tl) calibration telescopes of the INDRA multidetector. The inclusive angular distributions are approximately isotropic, consistent with multiple rescattering in the target spectator. The multiplicity correlations of the low-energy pions and of energetic protons (E-p greater than or similar to 150 MeV) with intermediate-mass fragments were determined from the measured coincidence data. The deduced correlation functions 1 + R approximate to 1.3 for inclusive event samples reflect the strong correlations evident from the common impact parameter dependence of the considered multiplicities. For narrow impact parameter bins (based on charged-particle multiplicity), the correlation functions are close to unity and do not indicate strong additional correlations. Only for pions at high particle multiplicities (! central collisions) a weak anticorrelation is observed, probably due to a limited competition between these emissions. Overall, the results are consistent with the equilibrium assumption made in statistical multifragmentation scenarios. Predictions obtained with intranuclear-cascade models coupled to the Statistical Multifragmentation Model are in good agreement with the experimental data.

Published
2004

5. Directed and elliptic flow in Au + Au at intermediate energies

Author

Lukasik, J., Auger, G., Begemann-Blaich, M. L., Bellaize, N., Bittiger, R., Bocage, F., Borderie, B., Bougault, R., Bouriquet, B., Charvet, J. L., Chbihi, A., Dayras, R., Durand, D., Frankland, J. D., Galichet, E., Gourio, D., Guinet, D., Hudan, S., Lautesse, P., Lavaud, F., Fevre, A. Le, Legrain, R., Lopez, O., Lynen, U., Mueller, W. F. J., Nalpas, L., Orth, H., Plagnol, E., Rosato, E., Saija, A., Schwarz, C., Sfienti, C., Tamain, B., Trautmann, W., Trzcinski, A., Turzo, K., Vient, E., Vigilante, M., Volant, C., and Zwieglinski, B.

Subjects
Nuclear Theory, FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

Directed and elliptic flow for the Au + Au system at incident energies between 40 and 150 MeV per nucleon has been measured using the INDRA 4 pi multi-detector. For semi-central collisions, the elliptic flow of Z, 12 pages, 6 eps figures, elsart, submitted to Phys. Lett. B

Published
2004
Full Text
View/download PDF

6. g-Factor Measurements on Relativistic Isomeric Beams Produced by Fragmentation and U-fission: The g-RISING Project at GSI

Author

Neyens, G., Atanasova, L., Balabanski, D. L., Becker, F., Bednarczyk, P., Caceres, L., Doornenbal, P., Gerl, J., Gorska, M., Grebosz, J., Hass, M., Ilie, G., Kurz, N., Kojouharov, I., Lozeva, R., Maj, A., Pfutzner, M., Pietri, S., Zs. Podolyak, Prokopowicz, W., Saitoh, T. R., Schaffner, H., Simpson, G., Vermeulen, N., Werner-Malento, E., Walker, J., Wollersheim, H. J., Bazzacco, D., Benzoni, G., Blazhev, A., Blasi, N., Bracco, A., Brandau, C., Camera, F., Chamoli, S. K., Chmel, S., Crespi, F. C. L., Daugas, J. M., Rydt, M., Detistov, P., Claes Fahlander, Farnea, E., Georgiev, G., Gladnishki, K., Robert Hoischen, Ionescu-Bujor, M., Iordachescu, A., Jolie, J., Jungclaus, A., Kmiecik, M., Krasznahorkay, A., Kulessa, R., Lakshmi, S., Lo Bianco, G., Mallion, S., Mazurek, K., Meczynski, W., Montanari, D., Myalsky, S., Perru, O., Dirk Rudolph, Rusev, G., Saltarelli, A., Schwengner, R., Styczen, J., Turzo, K., Valiente-Dobon, J. J., Wieland, O., and Zieblinski, M.

Subjects
radioactive beams, Nuclear Theory, Nuclear structure, Nuclear Experiment, g-factor measurements
Abstract

Within the RISING (Rare ISotope INvestigations @ GSI) Collabora-tion at GSI, g factor measurements have been performed on isomeric states in neutron-rich isotopes approaching 132 Sn and in the neutron deficient Pb-region (the g-RISING campaign). We present the experimental technique and some typical aspects related to such studies on relativistic beams selected with the FRS fragment separator. First results are presented for the (19/2+ ) 4.5 µs isomeric state in 127 Sn, which has been produced by means of fission of a relativistic 238 U beam on the one hand, and by the fragmentation of a relativistic 136 Xe beam on the other hand. Spin-alignment has been observed in both reactions. It was the first time that spin-alignment has been established in a relativistic fission reaction.

Catalog

Books, media, physical & digital resources
See catalog results