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Your search keyword '"Łukasik, J."' showing total 5 results
Start Over Author "Łukasik, J." Topic heavy ion collisions
5 results on '"Łukasik, J."'

1. Source shape determination with directional fragment-fragment velocity correlations

Author

Le Fevre, Arnaud, Schwarz, Carsten, 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., Legrain, R., Lopez, O., Łukasik, J., Lynen, U., Müller, Walter, Nalpas, L., Orth, Herbert, Plagnol, E., Rosato, E., Saija, A., Sfienti, C., Tamain, B., Trautmann, Wolfgang, Trzciński, A., Turzó, K., Vient, E., Vigilante, M., Volant, C., Zwiegliński, B., A., Le Fèvre, C., Schwarz, G., Auger, M. L., Begemann Blaich, N., Bellaize, R., Bittiger, F., Bocage, B., Borderie, R., Bougault, B., Bouriquet, J. L., Charvet, A., Chbihi, R., Dayra, D., Durand, J. D., Frankland, E., Galichet, D., Gourio, D., Guinet, S., Hudan, P., Lautesse, F., Lavaud, R., Legrain, O., Lopez, J., Łukasik, U., Lynen, W. F. J., Müller, L., Nalpa, H., Orth, E., Plagnol, Rosato, Elio, A., Saija, C., Sfienti, B., Tamain, W., Trauttmann, A., Trzciński, K., Turzó, E., Vient, Vigilante, Mariano, C., Volant, B., Zwiegliński, Helmholtz zentrum für Schwerionenforschung GmbH (GSI), 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), 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, 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), ALADIN, INDRA, 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), 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), 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
Nuclear and High Energy Physics, 25.70.Pq, 24.60.-k, 25.75.Gz, Correlation functions, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Breakup state, 0103 physical sciences, Heavy ion collisions, Incident energy, ddc:530, Sensitivity (control systems), Nuclear Experiment (nucl-ex), Coordinate space, 010306 general physics, Nuclear Experiment, Physics, Multifragmentation, 010308 nuclear & particles physics, Fragment (computer graphics), Breakup, Computational physics, Volume (thermodynamics), Beam direction, Atomic physics, Nucleon
Abstract

Correlation functions, constructed from directional projections of the relative velocities of fragments, are used to determine the shape of the breakup volume in coordinate space. For central collisions of 129Xe + natSn at 50 MeV per nucleon incident energy, measured with the 4pi multi-detector INDRA at GSI, a prolate shape aligned along the beam direction with an axis ratio of 1:0.7 is deduced. The sensitivity of the method is discussed in comparison with conventional fragment-fragment velocity correlations., 12 pages, 5 figures, subm. to Phys. Lett. B

Published
2008

2. Systematics of stopping and flow in Au+ Au collisions.

Author

Andronic, A., Łukasik, J., Reisdorf, W., and Trautmann, W.

Subjects
*PARTICLES (Nuclear physics), *HEAVY ion collisions, *ATOM-atom collisions, *NUCLEAR fragmentation, *NUCLEAR reactions, *NUCLEON-nucleon interactions, *NUCLEAR physics
Abstract

Excitation functions of flow and stopping observables for the Au+ Au system at energies from 40 to 1500MeV per nucleon are presented. The systematics were obtained by merging the results of the INDRA and FOPI experiments, both performed at the GSI facility. The connection to the nuclear equation of state is discussed. [ABSTRACT FROM AUTHOR]

Published
2006
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3. Symmetry energy from elliptic flow in 197Au+ 197Au

Author

Russotto, P., Wu, P.Z., Zoric, M., Chartier, M., Leifels, Y., Lemmon, R.C., Li, Q., Łukasik, J., Pagano, A., Pawłowski, P., and Trautmann, W.

Subjects
*SYMMETRY (Physics), *NUCLEAR energy, *HEAVY ion collisions, *GOLD isotopes, *NUCLEAR reactions, *RELATIVITY (Physics), *EQUATIONS of state
Abstract

Abstract: The elliptic-flow ratio of neutrons with respect to protons or light complex particles in reactions of neutron-rich systems at relativistic energies is proposed as an observable sensitive to the strength of the symmetry term in the equation of state at supra-normal densities. The results obtained from the existing FOPI/LAND data for 197Au+ 197Au collisions at 400 MeV/nucleon in comparison with the UrQMD model favor a moderately soft symmetry term with a density dependence of the potential term proportional to with . [Copyright &y& Elsevier]

Published
2011
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4. The percolation phase transition and statistical multifragmentation in finite systems.

Author

Pietrzak, T., Botvina, A.S., Brzychczyk, J., Buyukcizmeci, N., Le Fèvre, A., Łukasik, J., Pawłowski, P., Sfienti, C., Trautmann, W., and Wieloch, A.

Subjects
*PHASE transitions, *PERCOLATION, *STATISTICAL models, *HEAT capacity, *HEAVY ion collisions
Abstract

The cumulant ratios up to fourth order of the Z distributions of the largest fragment in spectator fragmentation following 107,124Sn+Sn and 124La+Sn collisions at 600 MeV/nucleon have been investigated. They are found to exhibit the signatures of a second-order phase transition established with cubic bond percolation and previously observed in the ALADIN experimental data for fragmentation of 197Au projectiles at similar energies. The deduced pseudocritical points are found to be only weakly dependent on the A / Z ratio of the fragmenting spectator source. The same holds for the corresponding chemical freeze-out temperatures of close to 6 MeV. The experimental cumulant distributions are quantitatively reproduced with the Statistical Multifragmentation Model and parameters used to describe the experimental fragment multiplicities, isotope distributions and their correlations with impact-parameter related observables in these reactions. The characteristic coincidence of the zero transition of the skewness with the minimum of the kurtosis excess appears to be a generic property of statistical models and is found to coincide with the maximum of the heat capacity in the canonical thermodynamic fragmentation model. [ABSTRACT FROM AUTHOR]

Published
2020
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5. Extending the dynamic range of electronics in a Time Projection Chamber.

Author

Estee, J., Lynch, W.G., Barney, J., Cerizza, G., Jhang, G., Lee, J.W., Wang, R., Isobe, T., Kaneko, M., Kurata-Nishimura, M., Murakami, T., Shane, R., Tangwancharoen, S., Tsang, C.Y., Tsang, M.B., Hong, B., Lasko, P., Łukasik, J., McIntosh, A.B., and Pawłowski, P.

Subjects
*HEAVY ion collisions, *PARTICLE tracks (Nuclear physics), *ELECTRONICS, *ENERGY dissipation, *DISTRIBUTION (Probability theory)
Abstract

When Time Projection Chambers (TPCs) are used in low to intermediate heavy ion collisions, the mass and momentum range of the emitted particles cover a wide range in energy losses. Many TPC readout electronics currently only have a single gain output with a fixed dynamic range. In a recent set of experiments using the SAMURAI Pion-Reconstruction and Ion-Tracker (S π RIT) TPC, it was important to simultaneously measure relativistic pions and heavy ion tracks from the same collisions. As the ionization from a track's energy loss is collected and multiplied by the anode wires, a distribution of image charges is induced on the TPC read-out pads. If the avalanche on a wire is large enough, the charge collected by pads directly underneath will saturate the readout electronics; pads farther away in the distribution will not be saturated. Using these unsaturated pads and the known pad distribution function, we can estimate the charge on saturated pads, increasing the dynamic range by a factor of 5. [ABSTRACT FROM AUTHOR]

Published
2019
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