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1. Time sequence and time scale of intermediate mass fragment emission

Author

E. La Guidara, A. Chbihi, G. Vannini, M. Bruno, R. Bougault, M. Trimarchi, G. Cardella, M. L. Sperduto, I. Berceanu, S. Pirrone, M.F. Rivet, K. Schmidt, J.D. Frankland, M. B. Chatterjee, J.P. Wieleczko, B. Borderie, G. Lanzano, W. Zipper, N. Le Neindre, P. Guazzoni, L. Swiderski, E. Galichet, F. Rizzo, A. Trifirò, E. Geraci, Aldo Bonasera, S. Cavallaro, E. Piasecki, D. Guinet, C. Maiolino, S. M. Li, R. Dayras, F. Giustolisi, S. Russo, J. Blicharska, J. Cibor, Mihai Petrovici, F. Amorini, M. Papa, S. Kowalski, Maria Colonna, W. Gawlikowicz, M. D'Agostino, F. Porto, M. Sassi, P. Russotto, J. Wilczynski, Lucrezia Auditore, R. Planeta, G. Politi, Angelo Pagano, A. Grzeszczuk, Mariano Vigilante, Amalia Pop, G. Lanzalone, M. Di Toro, Zhigang Xiao, V. Baran, A. Anzalone, H. Wu, K. Siwek-Wilczyńska, E. De Filippo, I. Skwira, M. Iacono-Manno, E. Rosato, L. Zetta, Z. Majka, J. Brzychczyk, 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), 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 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), E., DE FILLIPPO, A., Pagano, J., Wilczynski, F., Amorini, A., Anzalone, N., Arena, L., Auditore, V., Baran, I., Berceanu, J., Blicharska, J., Brzychczyk, A., Bonasera, B., Borderie, R., Bougault, M., Bruno, G., Cardella, S., Cavallaro, M. B. CHATTERJEE A., Chbihi, J., Cibor, M., Colonna, M., D'Agostino, R., Dayra, M., DI TORO, J. D., Frankland, E., Galichet, W., Gawlikowicz, E., Geraci, F., Giustolisi, A., Grzeszczuk, P., Guazzoni, D., Guinet, M., IACONO MANNO, S., Kowalski, E., LA GUIDARA, G., Lanzan, G., Lanzalone, N., LE NEINDRE, S., Li, C., Maiolino, Z., Majka, M., Papa, M., Petrovici, E., Piasecki, S., Pirrone, R., Planeta, G., Politi, A., Pop, F., Porto, M. F., Rivet, F., Rizzo, Rosato, Elio, S., Russo, P., Russotto, M., Sassi, G., Schmidt, K., SIWEK WILCZYNSKA, I., Skwira, M. L., Sperduto, L., Swiderski, A., Trifir, M., Trimarchi, G., Vannini, Vigilante, Mariano, J. P., Wieleczko, H., Wu, Z., Xiao, L., Zetta, W., Zipper, 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), 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), 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), E. De Filippo, A. Pagano, J. Wilczy´nski, F. Amorini, A. Anzalone, L. Auditore, V. Baran, I. Berceanu, J. Blicharska, J. Brzychczyk, A. Bonasera, B. Borderie, R. Bougault, M. Bruno, G. Cardella, S. Cavallaro, M. B. Chatterjee, A. Chbihi, J. Cibor, M. Colonna, M. D Agostino, R. Dayra, M. Di Toro, J. Frankland, E. Galichet, W. Gawlikowicz, E. Geraci, F. Giustolisi, A. Grzeszczuk, P. Guazzoni, D. Guinet, M. Iacono-Manno, S. Kowalski, E. La Guidara, G. Lanzano', G. Lanzalone, N. Le Neindre, S. Li, C. Maiolino, Z. Majka, M. Papa, M. Petrovici, E. Piasecki, S. Pirrone, R. PBaneta, G. Politi, A. Pop, F. Porto, M. F. Rivet, E. Rosato, F. Rizzo, S. Russo, P. Russotto, M. Sassi, K. Schmidt, K. Siwek-Wilczy´nska, I. Skwira, M. L. Sperduto, A. ´ Swiderski, A. Trifiro', M. Trimarchi, G. Vannini, M. Vigilante, J. P. Wieleczko, H. Wu, Z. Xiao, L. Zetta, and W. Zipper.

Subjects
Physics, Nuclear and High Energy Physics, Reaction mechanism, 010308 nuclear & particles physics, Relative velocity, Time sequence, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, 25.70.Mn, 25.70.Pq, Fragmentation (mass spectrometry), 0103 physical sciences, Heavy ion, Ion emission, Atomic physics, 010306 general physics, Nucleon, Ternary operation
Abstract

Matière Nucléaire NIM; Semiperipheral collisions in the $^{124}$Sn+${64}Ni reaction at 35 MeV/nucleon were studied using the forward part of the Charged Heavy Ion Mass and Energy Resolving Array. Nearly completely determined ternary events involving projectilelike fragments (PLF), targetlike fragments (TLF), and intermediate mass fragments (IMF) were selected. A new method of studying the reaction mechanism, focusing on the analysis of the correlations between relative velocities in the IMF+PLF and IMF+TLF subsystems, is proposed. The relative velocity correlations provide information on the time sequence and time scale of the neck fragmentation processes leading to production of IMFs. It is shown that the majority of light IMFs are produced within 40–80 fm/c after the system starts to reseparate. Heavy IMFs are formed at times of about 120 fm/c or later and can be viewed as resulting from two-step (sequential) neck rupture processes.

Published
2005

2. Isoscaling in central $^{124]$Sn + $^{64}$Ni, $^{112}$Sn + $^{58}$Ni collisions at 35 A MeV

Author

A. Chbihi, J.C. Steckmeyer, M. Iacono-Manno, A. Italiano, J. Brzychczyk, S. Kowalski, E. La Guidara, V. Baran, E. Piasecki, M. Papa, G. Vannini, L. Zetta, F. Giustolisi, D. Guinet, Z. Majka, S. Lo Nigro, R. Barnà, J. Cibor, M. Trimarchi, M.F. Rivet, Maria Colonna, S. M. Li, Antonio Trifiro, Amalia Pop, Mariano Vigilante, M. Di Toro, C. Maiolino, G. Lanzanó, P. Guazzoni, R. Bougault, M. Petrovici, D. De Pasquale, F. Porto, Angelo Pagano, S. Cavallaro, A. Bonasera, M. Bartolucci, A. Grzeszczuk, S. Russo, L. Auditore, G. Cardella, S. Pirrone, W. Zipper, N. Le Neindre, M. L. Sperduto, E. Geraci, Bernard Borderie, G. Lanzalone, G. Manfredi, M. D'Agostino, P. Russotto, M. Alderighi, Zhigang Xiao, H. Wu, A. Anzalone, G. Politi, J.P. Wieleczko, M. Bruno, I. Berceanu, G.R. Sechi, V. Simion, Elio Rosato, E. De Filippo, J. Wilczynski, J. Blicharska, T. Paduszynski, 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), 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), 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), 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), E. GERACI, M. ALDERIGHI, A. ANZALONE, L. AUDITORE, V. BARAN, R. BARNA', M. BARTOLUCCI, I. BERCEANU, J. BLICHARSKA, A. BONASERA, B. BORDERIE, R. BOUGAULT, BRUNO M., J. BRZYCHCZYK, G. CARDELLA, S. CAVALLARO, A. CHBIHI, J. CIBOR, M. COLONNA, M. D'AGOSTINO, E .DE FILIPPO, D. DE PASQUALE, M. DI TORO, F. GIUSTOLISI, A. GRZESZCZUK, P. GUAZZONI, D. GUINET, M. IACONO-MANNO, A. ITALIANO, S. KOWALSKI, E. LA GUIDARA, G. LANZALONE, G. LANZANO', N. LE NEINDRE, S. LI, S. LO NIGRO, C. MAIOLINO, Z. MAJKA, G. MANFREDI, T. PADUSZYNSKI, A. PAGANO, M. PAPA, M. PETROVICI, E. PIASECKI, S. PIRRONE, G. POLITI, A. POP, F. PORTO, M. F. RIVET, E. ROSATO, S. RUSSO, P. RUSSOTTO, G. SECHI, V. SIMION, M. L. SPERDUTO, J. C. STECKMEYER, A. TRIFIRO, M. TRIMARCHI, G. VANNINI, M. VIGILANTE, J. P. WIELECZKO, J. WILCZYNSKI, H. WU, Z. XIAO, L. ZETTA, W. ZIPPER, 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)-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 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 reaction, Nuclear and High Energy Physics, Phase transition, Heavy ion–nucleus reactions, Nuclear isospin, Nuclear fragmentation, MATERIA NUCLEARE, Nuclear Theory, Hadron, 112Sn(58Ni, FRAMMENTAZIONE NUCLEARE, ISOSPIN, REAZIONI NUCLEARI FRA IONI PESANTI, ISOTOPI, Elementary particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, 25.70.-z, 25.70.Pq, 24.10.Pa, 02.50.Sk, 124Sn(64Ni, Isotopes, 0103 physical sciences, Neutron, Nuclear Experiment, 010306 general physics, Nuclear matter, X), Physics, 010308 nuclear & particles physics, Baryon, Isospin, E=35 A MeV, Nuclear reactions, Atomic physics, Nucleon
Abstract

124 Sn+ 64 Ni and 112 Sn+ 58 Ni reactions at 35 A MeV incident energy were studied by using the 688 Si–CsI telescopes of the forward part (1°⩽ θ lab ⩽30°) of CHIMERA multi-detector. The most central part, 1% of the total measured cross section was selected by means of a multidimensional analysis of the experimental observables. The detected isotopes of light fragments (3⩽ Z ⩽8) provided information on breakup temperatures of the emitting sources. The space–time structure of these sources was deduced from fragment correlations. An odd–even effect in the fragment production, enhanced by the isospin of the entrance channel, was observed. Freeze-out unbound neutron-to-proton relative densities for both studied reactions have been deduced, indicating for a possible isospin distillation mechanism related to a phenomenon of the liquid–gas phase transition in asymmetric systems.

Published
2004

3. Isotope correlations as a probe for freeze-out charaterization: central $^{124}$Sn+$^{64}$Ni, $^{112}$Sn+$^{58}$Ni collisions

Author

S. Pirrone, M. L. Sperduto, Bernard Borderie, Monica Alderighi, M. Di Toro, J. Brzychczyk, P. Russotto, L. Zetta, Z. Majka, S. Lo Nigro, F. Porto, S. Kowalski, Maria Colonna, M. Bartolucci, A. Anzalone, Angelo Pagano, M. Papa, G. Vannini, S. Russo, Amalia Pop, S. Cavallaro, J. Wilczynski, G.R. Sechi, V. Simion, T. Paduszynski, A. Chbihi, D. Guinet, J. Blicharska, J.C. Steckmeyer, E. Piasecki, M. Bruno, G. Cardella, M.F. Rivet, M. Iacono-Manno, Elio Rosato, E. De Filippo, G. Lanzalone, F. Giustolisi, Marina Trimarchi, G. Manfredi, Antonio Trifiro, E. Geraci, P. Guazzoni, Zhigang Xiao, H. Wu, I. Berceanu, Mariano Vigilante, A. Grzeszczuk, G. Lanzanó, R. Bougault, V. Baran, S. M. Li, E. La Guidara, M. Petrovici, J. Cibor, A. Bonasera, W. Zipper, N. Le Neindre, J.P. Wieleczko, C. Maiolino, M. D'Agostino, Lucrezia Auditore, G. Politi, 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), 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), 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), E. GERACI, M. ALDERIGHI, A. ANZALONE, L. AUDITORE, V. BARAN, M. BARTOLUCCI, I. BERCEANU, J. BLICHARSKA, A. BONASERA, B. BORDERIE, R. BOUGAULT, BRUNO M., J. BRZYCHCZYK, G. CARDELLA, S. CAVALLARO, A. CHBIHI, J. CIBOR, M. COLONNA, M. D'AGOSTINO, E .DE FILIPPO, M. DI TORO, F. GIUSTOLISI, A. GRZESZCZUK, P. GUAZZONI, D. GUINET, M. IACONO-MANNO, S. KOWALSKI, E. LA GUIDARA, G. LANZALONE, G. LANZANO', N. LE NEINDRE, S. LI, S. LO NIGRO, C. MAIOLINO, Z. MAJKA, G. MANFREDI, T. PADUSZYNSKI, A. PAGANO, M. PAPA, M. PETROVICI, E. PIASECKI, S. PIRRONE, G. POLITI, A. POP, F. PORTO, M. F. RIVET, E. ROSATO, S. RUSSO, P. RUSSOTTO, G. SECHI, V. SIMION, M. L. SPERDUTO, J. C. STECKMEYER, A. TRIFIRO, M. TRIMARCHI, G. VANNINI, M. VIGILANTE, J. P. WIELECZKO, J. WILCZYNSKI, H. WU, Z. XIAO, L. ZETTA, W. ZIPPER, 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), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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
Nuclear reaction, RAPPORTO FRA DENSITA’ FRA NEUTRONI E PROTONI, Nuclear and High Energy Physics, TEMPERATURA E VOLUME DELLA SORGENTE, Proton, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, SORGENTE ECCITATA, 0103 physical sciences, Incident energy, Neutron, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, DIMENSIONE, Physics, Isotope, 010308 nuclear & particles physics, REAZIONI NUCLEARI CENTRALI, RESE DI ISOTOPI, Characterization (materials science), Volume (thermodynamics), Yield (chemistry), Atomic physics
Abstract

124Sn+64Ni and 112Sn+58Ni reactions at 35 AMeV incident energy were studied with the forward part of CHIMERA multi-detector. The most central collisions were selected by means of a multidimensional analysis. The characteristics of the source formed in the central collisions, as size, temperature and volume, were inspected. The measured isotopes of light fragments (3, 4 pages, Contribution to 8th International Conference on Nucleus-Nucleus Collisions, Moscow 2003

Published
2003

4. Erratum: Isospin-dependent multifragmentation of relativistic projectiles [Phys. Rev. C 83, 024608 (2011)]

Author

J. Lühning, W. G. Lynch, H. Orth, H. Simon, I. Iori, E. Le Gentil, A. S. Botvina, J. Lukasik, Giuseppe Verde, G. Imme, Håkan T Johansson, C. Volant, H. Emling, A. Wieloch, Cornelius Schwarz, C. Boiano, Y. Leifels, H. Sann, A. Chbihi, H. Weick, Wolfgang Müller, T. Barczyk, A. Mykulyak, C. Sfienti, M. S. Wallace, S. Bianchin, K. Sümmerer, J.-E. Ducret, E. Rapisarda, J.D. Frankland, C.O. Bacri, J. Brzychczyk, A. Lafriakh, Alberto Pullia, Piotr Pawłowski, P. Adrich, Riza Ogul, J. Cibor, B. Zwieglinski, R. Bassini, A. Le Fèvre, M. B. Tsang, Thomas Aumann, R. Palit, U. Lynen, G. Raciti, Z. Majka, B. Czech, I. N. Mishustin, Nihal Büyükçizmeci, U. Atav, Margareta Hellström, W. Trautmann, M. Mocko, D. Henzlova, A. Boudard, J. Wiechula, A.N. Otte, M. De Napoli, K. Kezzar, 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), 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 Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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), and 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)

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, 25.70.Pq, 25.70.Mn, 21.65.Ef, 99.10.Cd, 010308 nuclear & particles physics, Projectile, Isospin, 0103 physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 010306 general physics, 01 natural sciences
Published
2012

5. Discriminant Analysis and Secondary-Beam Charge Recognition

Author

I. Iori, S. Bianchin, Z. Majka, Håkan T Johansson, H. Weick, M. B. Tsang, E. Le Gentil, P. Adrich, C. Volant, J. Łukasik, M. S. Wallace, T. Barczyk, Cornelius Schwarz, J.-E. Ducret, A. Mykulyak, Y. Leifels, E. Rapisarda, A. Lafriakh, Margareta Hellström, Alberto Pullia, B. Czech, A. Le Fèvre, H. Sann, Thomas Aumann, G. Imme, C. Sfienti, J.D. Frankland, W. F. J. Müller, C.O. Bacri, Giuseppe Verde, J. Cibor, H. Emling, U. Lynen, R. Palit, A. Chbihi, C. Boiano, J. Lühning, M. Mocko, G. Raciti, K. Sümmerer, K. Kezzar, W. G. Lynch, H. Orth, J. Brzychczyk, H. Simon, A. S. Botvina, B. Zwieglinski, W. Trautmann, Piotr Pawłowski, A. Wieloch, D. Henzlova, A. Boudard, J. Wiechula, A.N. Otte, M. De Napoli, R. Bassini, Helmholtz zentrum für Schwerionenforschung GmbH (GSI), 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), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN), Istituto Nazionale di Fisica Nucleare (INFN), 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, 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), Istituto Nazionale di Fisica Nucleare, Sezione di Catania (INFN), Università degli studi di Catania [Catania], ALADIN, 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), 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), and Università degli studi di Catania = University of Catania (Unict)

Subjects
Nuclear and High Energy Physics, Statistical methods, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Fragmentation (mass spectrometry), 0103 physical sciences, Neutron, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Instrumentation, Physics, Isotope, radioactive beams, 02.50.Sk, 25.70.Mn, 010308 nuclear & particles physics, Projectile, Detector, projectile fragmentation, Linear discriminant analysis, discriminant analysis, Isospin, Beam (structure)
Abstract

The discriminant-analysis method has been applied to optimize the exotic-beam charge recognition in a projectile fragmentation experiment. The experiment was carried out at the GSI using the fragment separator (FRS) to produce and select the relativistic secondary beams, and the ALADIN setup to measure their fragmentation products following collisions with Sn target nuclei. The beams of neutron poor isotopes around 124La and 107Sn were selected to study the isospin dependence of the limiting temperature of heavy nuclei by comparing with results for stable 124Sn projectiles. A dedicated detector to measure the projectile charge upstream of the reaction target was not used, and alternative methods had to be developed. The presented method, based on the multivariate discriminant analysis, allowed to increase the efficacy of charge recognition up to about 90%, which was about 20% more than achieved with the simple scalar methods., Comment: 6 pages, 7 eps figures, elsart, submitted to Nucl. Instr. and Meth. A

Published
2008

6. Evidence of critical behavior in the disassembly of nuclei with A$\sim$36

Author

E. Fioretto, D.V. Shetty, G. Prete, G. Nebbia, J. Cibor, Michael Murray, E. M. Winchester, M. Cinausero, M. Lunardon, Sherry Yennello, K. Hagel, Th. Keutgen, P. Smith, Arturo Alejandro Menchaca-Rocha, E. Martin, Martin Veselsky, Yu-Gang Ma, V. Rizzi, Ruben Alfaro, D. Fabris, A. Makeev, A.L. Keksis, G. A. Souliotis, N. Marie, P. Staszel, L. Qin, J. S. Wang, Z. Majka, Y. El Masri, G. Viesti, R. Wada, Arnulfo Martínez-Dávalos, A. Ruangma, J. B. Natowitz, 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), and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Physics, Nuclear and High Energy Physics, Light nucleus, 010308 nuclear & particles physics, Nuclear Theory, FOS: Physical sciences, Observable, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Flattening, Caloric curve, Critical point (thermodynamics), 0103 physical sciences, Atomic physics, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, 25.70.Pq, 05.70.Jk, 24.60.Ky, Excitation
Abstract

A wide variety of observables indicate that maximal fluctuations in the disassembly of hot nuclei with A ~ 36 occur at an excitation energy of 5.6 +- 0.5 MeV/u and temperature of 8.3 +- 0.5 MeV. Associated with this point of maximal fluctuations are a number of quantitative indicators of apparent critical behavior. The associated caloric curve does not appear to show a flattening such as that seen for heavier systems. This suggests that, in contrast to similar signals seen for liquid-gas transitions in heavier nuclei, the observed behavior in these very light nuclei is associated with a transition much closer to the critical point., Comment: v2: Major changes, new model calculations, new figures

Published
2004

7. High $p_T$ results for Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV

Author

D. Sandberg, Jongmin Lee, M. Germinario, Z. Majka, Calin Besliu, Michael D. Murray, Ian Gardner Bearden, Borge Svane Nielsen, Christian Holm Christensen, F. Videbæk, R. A. Scheetz, Oana Ristea, Stephen Sanders, K. Hagel, Alexandru Jipa, Peter Christiansen, R. Płaneta, Trine Spedstad Tveter, Z. Yin, C. Ristea, R. Karabowicz, Fouad Rami, J. J. Gaardhøje, J. I. Jørdre, I. S. Zgura, J. Norris, I. Arsene, R. Wada, Anders Holm, E. J. Kim, Gunnar Løvhøiden, Y. K. Lee, P. Staszel, B. Neumann, A. Makeev, M. Mikelsen, F. Jundt, Tomasz Kozik, J. Cibor, Bjørn Hallvard Samset, Ole Hansen, C. E. Jørgensen, B. Budick, C. Chasman, R. R. Debbe, B. McBreen, Dieter Røhrich, E. Enger, H. Bøggild, D. Ouerdane, J. B. Natowitz, H. Ito, Svein Lindal, R. Lystad, T. M. Larsen, D. R. Beavis, Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and BRAHMS

Subjects
Physics, Particle physics, Physics and Astronomy (miscellaneous), Hadron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Resonance (particle physics), Spectral line, Pion, Transverse momentum, Particle, 25.75.Dw Particle and resonance production, Rapidity, Nuclear Experiment, Engineering (miscellaneous)
Abstract

We present transverse momentum spectra of unidentified charged hadrons at two pseudo-rapidities (η = 0, 2.2) as well as the first results on identified negatively charged pions at rapidity 2.2 from Au+Au collisions at $\sqrt{s_{NN}} = 200$ GeV. The high p T yields of charged hadrons in the most central collisions show a strong suppression when compared to expected binary-scaled yields from nucleon-nucleon collisions or semi-peripheral collisions. The π– spectra at forward rapidity (y = 2.2) also indicate a clear suppression of high p T π– yields in central collisions. PACS: 25.75.Dw Particle and resonance production

Published
2003

8. Rapidity dependence of charged antihadron to hadron ratios in Au+Au collisions at $\sqrt{S_{NN}}$=200GeV

Author

I G, Bearden, D, Beavis, C, Besliu, Y, Blyakhman, B, Budick, H, Bøggild, C, Chasman, C H, Christensen, P, Christiansen, J, Cibor, R, Debbe, E, Enger, J J, Gaardhøje, M, Germinario, K, Hagel, O, Hansen, A, Holm, A K, Holme, H, Ito, E, Jakobsen, A, Jipa, F, Jundt, J I, Jørdre, C E, Jørgensen, R, Karabowicz, T, Keutgen, E J, Kim, T, Kozik, T M, Larsen, J H, Lee, Y K, Lee, G, Løvhøiden, Z, Majka, A, Makeev, B, McBreen, M, Mikelsen, M, Murray, J, Natowitz, B S, Nielsen, J, Norris, K, Olchanski, J, Olness, D, Ouerdane, R, Płaneta, F, Rami, C, Ristea, D, Röhrich, B H, Samset, D, Sandberg, S J, Sanders, R A, Scheetz, P, Staszel, T S, Tveter, F, Videbaek, R, Wada, A, Wieloch, Z, Yin, I S, Zgura, Heyd, Yvette, Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and BRAHMS

Subjects
[PHYS.HPHE] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
Abstract

We present ratios of the numbers of charged antihadrons to hadrons (pions, kaons, and protons) in Au+Au collisions at sqrt[s(NN)]=200 GeV as a function of rapidity in the range y=0-3. While the ratios at midrapidity are approaching unity, the K(-)/K(+) and p;/p ratios decrease significantly at forward rapidities. An interpretation of the results within the statistical model indicates a reduction of the baryon chemical potential from mu(B) approximately 130 MeV at y=3 to mu(B) approximately 25 MeV at y=0.

Published
2003

9. Charged particle multiplicities at BRAHMS

Author

Borge Svane Nielsen, Stephen Sanders, Trine Spedstad Tveter, Y. K. Lee, Michael D. Murray, K. Grotowski, R. Wada, Ian Gardner Bearden, J.W. Olness, T. M. Larsen, J. Cibor, K. Hagel, Peter Christiansen, F. Videbæk, Z. Majka, D. R. Beavis, R. R. Debbe, E. J. Kim, I. S. Zgura, Anders Holm, E. Jakobsen, Jongmin Lee, Zbigniew Sosin, J. J. Gaardhøje, Calin Besliu, J. I. Jørdre, Alexandru Jipa, C. Chasman, R. A. Sheetz, R. Planeta, T.F. Thorsteinsen, Christian Holm Christensen, K. Olchanski, Bjørn Hallvard Samset, Gunnar Løvhøiden, Tomasz Kozik, T. Keutgen, Ole Hansen, A Wieloch, C. E. Jørgensen, A. Makeev, Fouad Rami, B. Budick, H. Bøggild, D. Ouerdane, J. B. Natowitz, H. Ito, F. Jundt, J. Brzychczyk, Y. Blyakhman, A. K. Holme, P. Staszel, B. McBreen, Dieter Røhrich, Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), BRAHMS, and Heyd, Yvette

Subjects
[PHYS.HPHE] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Nuclear physics, Physics, Nuclear and High Energy Physics, Pseudorapidity, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Hadron, Data analysis, General Physics and Astronomy, Nuclear Experiment, Collision, Charged particle, Characterization (materials science)
Abstract

Charged particle pseudorapidity densities are presented for the 197Au+197Au reaction at $$\sqrt {s_{NN} } = 130$$ . These densities provide an essential characterization of the underlying reactions mechanisms for ultra-relativistic heavy-ion collision. This talk details how the global charged particle yields are measured at BRAHMS and presents some preliminary results from the analysis of data taken during the first year of the RHIC experimental program.

Published
2001

10. Dynamic evolution and the caloric curve for medium mass nuclei

Author

J. Cibor, N. Marie, W. Q. Shen, Bao-An Li, M. Murray, J. B. Natowitz, Y. Zhao, M. Lunardon, P. Staszel, K. Hagel, R. Wada, B. Xiao, R. Alfaro, J. Li, Z. Majka, Cyclotron institute, and Cyclotron Institute

Subjects
Coalescence (physics), Physics, Nuclear and High Energy Physics, Heavy ions collisions, 010308 nuclear & particles physics, Projectile, Nuclear Theory, 25.70.Pq, Light particle, Coalescence model, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Caloric curve, Nuclear physics, 0103 physical sciences, Atomic physics, 010306 general physics, Nuclear Experiment, Excitation
Abstract

International audience; Self-consistent coalescence model analyses of light particle emission have been used to follow the evolution of the temperatures and densities of A≈110 nuclei produced in violent collisions induced by four different 47 AMeV projectiles. The degree of expansion of the emitting system increases with increasing projectile mass. The caloric curve derived for these expanding A≈110 nuclei plateaus near T=7 MeV. The plateau extends from 3.5 to 6.9 MeV/u excitation energy.

Published
2000

11. How to calibrate the time scale of emission of intermediate mass fragments

Author

Wilczynski, J, DE FILIPPO, E, Pagano, A, Amorini, F, Anzalone, A, Auditore, Lucrezia, Baran, V, Berceanu, I, Blicharska, J, Brzychczyk, J, Bonasera, A, Borderie, B, Bogault, R, Bruno, M, Cardella, G, Cavallaro, S, Chatterjee, Mb, Chbihi, A, Cibor, J, Colonna, M, D'Agostino, M, Dayras, R, DI TORO, M, Frankland, J, Galichet, E, Gawlikowicz, W, Geraci, E, Giustolisi, F, Grzeszczuk, A, Guazzoni, P, Guinet, D, IACONO MANNO, M, Kowalski, S, LA GUIDARA, E, Lanzano, G, Lanzalone, G, LE NEINDRE, N, Li, S, Maiolino, C, Majka, Z, Papa, M, Petrovici, M, Piasecki, E, Pirrone, S, Planeta, R, Politi, G, Pop, A, Porto, F, Rivet, Mf, Rosato, E, Rizzo, F, Russo, S, Russotto, P, Sassi, M, Schmidt, K, SIWEK WILCZYNSKA, K, Skwira, I, Sperduto, Ml, Swiderski, L, Trifiro', Antonio, Trimarchi, Marina, Vannini, G, Vigilante, M, Wieleczko, Jp, Wu, H, Xiao, Z, Zetta, L, Zipper, W., 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), 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), 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), 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), CHIMERA, 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), 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), 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), J. WILCZYNSKI, E. DE FILIPPO, A. PAGANO, F. AMORINI, A. ANZALONE, L. AUDITORE, V. BARAN, I. BERCEANU, J. BLICHARSKA, J. BRZYCHCZYK, A. BONASERA, B. BORDERIE, R. BOGAULT, M. BRUNO, G. CARDELLA, S. CAVALLARO, M.B. CHATTERJEE, A. CHBIHI, J. CIBOR, M. COLONNA, M. D'AGOSTINO, R. DAYRAS, M. DI TORO, J. FRANKLAND, E. GALICHET, W. GAWLIKOWICZ, E. GERACI, F. GIUSTOLISI, A. GRZESZCZUK, P. GUAZZONI, D. GUINET, M. IACONO-MANNO, S. KOWALSKI, E. LA GUIDARA, G. LANZANO, G. LANZALONE, N. LE NEINDRE, S. LI, C. MAIOLINO, Z. MAJKA, M. PAPA, M. PETROVICI, E. PIASECKI, S. PIRRONE, R. P LANETA, G. POLITI, A. POP, F. PORTO, M.F. RIVET, E. ROSATO, F. RIZZO, S. RUSSO, P. RUSSOTTO, M. SASSI, K. SCHMIDT, K. SIWEK-WILCZYNSKA, I. SKWIRA, M.L. SPERDUTO, L. SWIDERSKI, A. TRIFIRO', M. TRIMARCHI, G. VANNINI, M. VIGILANTE, J.P. WIELECZKO, H. WU, Z. XIAO, L. ZETTA, W. ZIPPER, J., Wilczynski, E., De Filippo, A., Pagano, F., Amorini, A., Anzalone, L., Auditore, V., Baran, I., Berceanu, J., Blicharska, J., Brzychczyk, A., Bonasera, B., Borderie, R., Bougault, M., Bruno, G., Cardella, S., Cavallaro, M. B., Chatterjee, A., Chbihi, J., Cibor, M., Colonna, M., D'Agostino, R., Dayra, M., Di Toro, J. D., Frankland, E., Galichet, W., Gawlikowicz, E., Geraci, F., Giustolisi, A., Grzeszczuk, P., Guazzoni, D., Guinet, M., Iacono Manno, S., Kowalski, E., La Guidara, G., Lanzanò, G., Lanzalone, N., Le Neindre, S., Li, C., Maiolino, Z., Majka, M., Papa, M., Petrovici, E., Piasecki, S., Pirrone, R., Planeta, G., Politi, A., Pop, F., Porto, M. F., Rivet, F., Rizzo, Rosato, Elio, S., Russo, P., Russotto, M., Sassi, K., Schmidt, K., Siwek Wilczynska, I., Skwira, M. L., Sperduto, L., Swiderski, A., Trifirò, M., Trimarchi, G., Vannini, Vigilante, Mariano, J. P., Wieleczko, H., Wu, Z., Xiao, L., Zetta, and W., Zipper

Subjects
COLLISIONS, REAZIONI SEMI-PERIFERICHE, Nuclear and High Energy Physics, Scale (ratio), multifragmentation, Nuclear Theory, General Physics and Astronomy, Time sequence, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Settore FIS/04 - Fisica Nucleare e Subnucleare, Nuclear physics, 0103 physical sciences, 010306 general physics, Nuclear Experiment, emission time scale, REAZIONI NUCLEARI FRA IONI PESANTI, Physics, 010308 nuclear & particles physics, Settore FIS/01 - Fisica Sperimentale, FISSION, nucleus-nucleus collision, TEMPI DI EMISSIONE DEI FRAMMENTI, PRODUZIONE DI FRAMMENTI, CORRELAZIONI IN VELOCITA' RELATIVA, Nucleon
Abstract

In order to obtain information on the time sequence and time scale of the production of intermediate mass fragments (IMF) in nucleus-nucleus collisions at intermediate energies it is proposed to analyze correlations between relative velocities of IMF's with respect to projectile-like fragments (PLF) and target-like fragments (TLF). Experimental data on the production of IMF's in the 124Sn+64Ni reaction, taken with the CHIMERA multidetector array at 35 MeV/nucleon, have been analyzed with the proposed method. Read More: http://www.worldscientific.com/doi/abs/10.1142/S0218301305003119?prevSearch=%5BContrib%3A+rosato%5D&searchHistoryKey=

Published
2004

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