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1. Isotopic production cross sections of residual nuclei in the spallation reactionXe136(200AMeV)+p

Author

V. Henzl, C. Stephan, A. Lafriaskh, Enrique Casarejos, A. Kelic-Heil, J.E. Ducret, K.-H. Schmidt, Andreas Martin Heinz, L. Giot, M. Fernández Ordóñez, J. Benlliure, A. Boudard, C. Volant, C. Schmitt, O. Yordanov, C. Villagrasa, B. Fernández-Domínguez, S. Leray, D. Henzlova, D. Pérez-Loureiro, M. V. Ricciardi, P. Napolitani, F. Farget, J. Pereira, T. Enqvist, L. Tassan-Got, C. Paradela, L. Audouin, and J. L. Rodriguez-Sanchez

Subjects
Physics, Spectrometer, 010308 nuclear & particles physics, Projectile, Nuclear Theory, chemistry.chemical_element, Residual, 01 natural sciences, Nuclear physics, chemistry, Cascade, Caesium, 0103 physical sciences, Physics::Accelerator Physics, Neutron source, Spallation, Atomic physics, Nuclear Experiment, 010306 general physics, Radioactive beam
Abstract

The residual nuclei produced in the spallation reaction of Xe-136 nuclei at 200A MeV on protons have been studied by measuring the isotopic distributions for the elements from cadmium (Z = 48) to cesium (Z = 55) by using the fragment separator (FRS) spectrometer at GSI and the inverse kinematics technique. This is one of the few measurements performed at such a low projectile energy, close to the validity limit for intranuclear cascade models such as INCL or ISABEL. The experimental results have been compared to these intranuclear cascade codes coupled to the evaporation code ABLA. Both code combinations reproduce qualitatively the measured isotopic distributions; however, both underestimate the production of residues with mass numbers between 126 and 134. The measured cross sections are of interest for the planning of future radioactive beam or neutron source facilities.

Published
2017

2. Model-independent tracking of criticality signals in nuclear multifragmentation data

Author

C. Sfienti, R. Bougault, P. Lautesse, A. Saija, H. Orth, J. Marie, C. Schwarz, J.D. Frankland, E. Vient, D. Guinet, M. Pichon, M.F. Rivet, J.L. Charvet, C. Volant, R. Dayras, A. Trzcinski, M. Pârlog, A. Chbihi, M.L. Begemann-Blaich, A. Le Fèvre, D. Durand, Alexis Mignon, R. Legrain, W. Trautmann, Elio Rosato, L. Nalpas, Mariano Vigilante, B. Borderie, J. Lukasik, W. F. J. Müller, E. Galichet, J.P. Wieleczko, R. Roy, K. Turzo, B. Tamain, N. Le Neindre, L. Manduci, A. Van Lauwe, C. Escano-Rodriguez, U. Lynen, R. Bittiger, D. Cussol, O. Lopez, B. Zwieglinski, 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), ALADIN, INDRA, J. D., Frankland, A., Chbihi, A., Mignon, M. L., Begemann Blaich, R., Bittinger, B., Borderie, R., Bougault, J. L., Charvet, D., Cussol, R., Dayra, D., Durand, C., Escano Rodriguez, E., Galichet, D., Guinet, P., Lautesse, A., Le Fèvre, R., Legrain, N., Le Neindre, O., Lopez, J., Lukasik, U., Lynen, L., Manduci, J., Marie, W. F. J., Müller, L., Nalpa, H., Orth, M., Pârlog, M., Pichon, M. F., Rivet, R., Roy, Rosato, Elio, A., Saija, C., Schwarz, C., Sfienti, B., Tamain, W., Trautmann, A., Trczinski, K., Turzó, A., van Lauwe, E., Vient, Vigilante, Mariano, C., Volant, J. P., Wieleczko, B., Zwieglinski, Gesellschaft für Schwerionenforschung mbH (MBH), Gesellschaft für Schwerionenforschung mbH, 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), 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), Institute of Nuclear Physics (IFJ-PAN), Institute of Nuclear Physics, National Institute for Physics and Nuclear Engineering (NIPNE), National Institute for Physics and Nuclear Engineering, Dipartimento di Scienze Fisiche e Sezione (INFN), Istituto Nazionale di Fisica Nucleare (INFN)-Università degli studi di Napoli Federico II, Laboratoire de Physique Nucléaire (IPN), Université Laval [Québec] (ULaval), Soltan Institute for Nuclear Studies (SINS), Soltan Institute, 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 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), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), 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), and Istituto Nazionale di Fisica Nucleare (INFN)-University of Naples Federico II = Università degli studi di Napoli Federico II

Subjects
Nuclear reaction, Nuclear and High Energy Physics, Phase transition, 25.70.Pq, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, order parameter, Nuclear physics, 0103 physical sciences, Statistical physics, Nuclear Experiment (nucl-ex), Nuclear Experiment, 010306 general physics, Scaling, Physics, Range (particle radiation), Multifragmentation, 010308 nuclear & particles physics, Fermi energy, Function (mathematics), critical phenomena, Symmetric systems, Criticality, phase transition, Impact parameter, Event (particle physics), Dimensionless quantity
Abstract

We look for signals of criticality in multifragment production in heavy-ion collisions using model-independent universal fluctuations theory. The phenomenon is studied as a function of system size, bombarding energy, and impact parameter in a wide range of INDRA data. For very central collisions (b/b_max

Published
2005

3. Statistical multifragmentation of non-spherical expanding sources in central heavy-ion collisions

Author

W. Trautmann, Mariano Vigilante, O. Lopez, A. Chbihi, P. Lautesse, Elio Rosato, Aladin Collaborations Indra, B. Zwieglinski, F. Lavaud, J.D. Frankland, R. Dayras, A. Trzcinski, E. Galichet, W. F. J. Müller, B. Hurst, C. Volant, C. Sfienti, A. Saija, L. Nalpas, R. Bittiger, N. Bellaize, C. Schwarz, D. Guinet, Sylvie Hudan, J. Łukasik, J.L. Charvet, A. S. Botvina, V. D. Toneev, M.L. Begemann-Blaich, A. Le Fèvre, Bernard Borderie, E. Plagnol, R. Legrain, U. Lynen, D. Gourio, F. Bocage, D. Durand, G. Auger, R. Bougault, K. Turzo, B. Tamain, H. Orth, Bertrand Bouriquet, M. Ploszajczak, E. Vient, 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), 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, A., Le Fèvre, M., Ploszajczak, V. D., Toneev, 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, B., Hurst, P., Lautesse, F., Lavaud, R., Legrain, O., Lopez, J., Lukasik, U., Lynen, W. F. J., Müller, L., Nalpa, H., Orth, E., Plagnol, Rosato, Elio, A., Saija, C., Schwarz, C., Sfienti, J. C., Steckmeyer, B., Tamain, W., Trautmann, A., Trzcinski, K., Turzo, E., Vient, Vigilante, Mariano, C., Volant, B. Zwieglinski e. A. S., Botvina, 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), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
25.70.Pq, 24.60.-k, 25.75.Ld, Physics, Nuclear reaction, Nuclear and High Energy Physics, 010308 nuclear & particles physics, FOS: Physical sciences, Prolate spheroid, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Kinetic energy, 01 natural sciences, Nuclear physics, 0103 physical sciences, Relaxation (physics), Beam direction, Heavy ion, Nuclear Experiment (nucl-ex), Atomic physics, Deformation (engineering), Nuclear Experiment, 010306 general physics, Anisotropy
Abstract

We study the anisotropy effects measured with INDRA at GSI in central collisions of Xe+Sn at 50 A.MeV and Au+Au at 60, 80, 100 A.MeV incident energy. The microcanonical multifragmentation model with non-spherical sources is used to simulate an incomplete shape relaxation of the multifragmenting system. This model is employed to interpret observed anisotropic distributions in the fragment size and mean kinetic energy. The data can be well reproduced if an expanding prolate source aligned along the beam direction is assumed. An either non-Hubblean or non-isotropic radial expansion is required to describe the fragment kinetic energies and their anisotropy. The qualitative similarity of the results for the studied reactions suggests that the concept of a longitudinally elongated freeze-out configuration is generally applicable for central collisions of heavy systems. The deformation decreases slightly with increasing beam energy., Comment: 35 pages, 19 figures, submitted to Nuclear Physics A

Published
2004

4. Isotopic production cross sections of the residual nuclei in spallation reactions induced by 136Xe projectiles on proton at 500 A MeV

Author

Alain Boudard, Andreas Martin Heinz, T. Enqvist, Enrique Casarejos, F. Farget, Daniela Henzlova, C. Villagrasa, M. Fernández Ordóñez, S. Leray, C. Schmitt, J. Benlliure, B. Fernández-Domínguez, C. Volant, J.E. Ducret, M. V. Ricciardi, K.-H. Schmidt, C. Stéphan, V. Henzl, P. Napolitani, O. Yordanov, L. Tassan-Got, C. Paradela, L. Audouin, D. Pérez-Loureiro, J. Pereira, A. Lafriaskh, A. Kelic-Heil, Juan Antonio Alcantara-Nunez, L. Giot, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), 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), 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), 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 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)

Subjects
Nuclear reaction, Nuclear and High Energy Physics, Proton, Nuclear Theory, E = 500 MeV/nucleon, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Residual, Ba presented also in tabular form. Compared with published data at 1000 MeV/nucleon, 7. Clean energy, 01 natural sciences, charge using FRS magnetic spectrometer, Nuclear physics, Momentum, Xe, 0103 physical sciences, longitudinal momentum distributions. Resulting σ for Sn, Spallation, deduced fragment isotopes yields, Cs, Nuclear Experiment, 010306 general physics, Liquid hydrogen, X), Te, Physics, NUCLEAR REACTIONS 1H(136Xe, Spectrometer, measured spallation products mass, 010308 nuclear & particles physics, Projectile, production σ, Physics::Accelerator Physics, Atomic physics, Sb
Abstract

The experiment was performed at the GSI facility in Darmstadt (Germany).; Around 270 medium-mass residual nuclei, formed in spallation reactions induced by 136Xe projectiles impinging on a liquid hydrogen target at 500 AMeV, have been unambiguously identified at GSI using the magnetic spectrometer FRS. The individual production cross sections and the longitudinal momentum distributions have been determined with high accuracy. These data represent an important constraint for theoretical models describing spallation reactions.

Published
2013

5. Forward and backward electron emission cross-sections for 23 MeVu-1 C , Ni and Au projectiles traversing C , Al , Ni , Ag , Au and Bi foils

Author

A. Anzalone, G. Lanzano, M. Geraci, N. Arena, C. Volant, Hermann Rothard, E. De Filippo, F. Giustolisi, and A. Pagano

Subjects
Physics, Nuclear and High Energy Physics, Projectile, Nuclear fusion, C/AL, Electron, Atomic physics, Atomic units, computer, Spectral line, Ion, Auger, computer.programming_language
Abstract

A rather complete experimental study of forward and backward electron velocity spectra from thin foils bombarded with ions at constant velocity of 30 atomic units (23MeV u^-1) was performed. Three different beams ( 12C3+ , 58Ni14+ and 197Au36+ and six different targets ( 12C , 27Al , natNi , natAg , 197Au and 209Bi of approximately 90μg cm^-2 thickness were used. This procedure allowed to study the evolution of electron emission (velocity and angular distributions) for the [projectile; target] matrix [ C , Ni , Au ; C , Al , Ni , Ag , Au , Bi ] in a wide angular range. The projectile and target dependence of absolute cross-sections for binary encounter-, Auger- and backward-emitted electrons are analyzed.

Published
2007

6. Bombarding insulating foils with highly energetic ions

Author

S. Hagmann, C. Volant, G. Lanzano, E. De Filippo, and Hermann Rothard

Subjects
Nuclear and High Energy Physics, Radiation, Materials science, General Materials Science, Electron, Atomic physics, Condensed Matter Physics, Ion fluence, Very Energetic, Spectral line, Ion
Abstract

Insulating (MYLAR), semi-insulating (MYLAR-Au) and conducting foils have been bombarded by very energetic 64 MeV u−1 78Kr32+ ions. The velocity spectra of fast electrons emitted in the backward and forward directions have been measured and analyzed as a function of the elapsed time in the run. A shift of binary encounter and convoy electrons emitted in the forward direction toward lower velocities has been observed with insulating targets. No such shift occurs with metallic targets. The surface potential evolves with time (i.e. ion fluence) both at forward and backward emission angle. It is shown that strong bulk charging of insulating targets leads to a positive potential as high as 9 kV before charge breakdown.

Published
2007

7. Gross Properties and Isotopic Phenomena in Spectator Fragmentation

Author

B. Czech, I. Iori, E. Le Gentil, C. Volant, Y. Leifels, Håkan T Johansson, A. S. Botvina, W. F. J. Müller, J. Łukasik, J.-E. Ducret, C. Sfienti, E. Rapisarda, J.D. Frankland, Margareta Hellström, H. Sann, W. Trautmann, K. Kezzar, U. Lynen, C.O. Bacri, R. Bassini, H. Weick, Cornelius Schwarz, J. Lühning, W. G. Lynch, H. Orth, Z. Majka, H. Simon, D. Henzlova, M. S. Wallace, P. Adrich, K. Sümmerer, M. Mocko, J. Brzychczyk, A. Chbihi, S. Bianchin, A. Le Fèvre, H. Emling, Thomas Aumann, G. Imme, T. Barczyk, A. Mykulyak, B. Zwieglinski, Piotr Pawłowski, A. Boudard, C. Boiano, J. Wiechula, J. Cibor, A.N. Otte, M. De Napoli, R. Palit, G. Raciti, A. Lafriakh, Alberto Pullia, A. Wieloch, Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Istituto Nazionale di Fisica Nucleare, Sezione di Catania (INFN), Università degli studi di Catania [Catania], 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 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), 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), Bertulani C.A., Gomes P.R.S., HusseinM.S., Szanto de ToledoA., ALADIN, Università degli studi di Catania = University of Catania (Unict), 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), 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, Nuclear and High Energy Physics, Spectrometer, 010308 nuclear & particles physics, Projectile, media_common.quotation_subject, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Asymmetry, Nuclear physics, Fragmentation (mass spectrometry), Criticality, 0103 physical sciences, Nuclear Experiment (nucl-ex), Atomic physics, Nuclear Experiment, 010306 general physics, ComputingMilieux_MISCELLANEOUS, media_common
Abstract

A systematic study of isotopic effects in the break-up of projectile spectators at relativistic energies has been performed with the ALADiN spectrometer at the GSI laboratory. Searching for signals of criticality in the fragment production we have applied the model independent universal fluctuations theory already proposed to track criticality signals in multifragmentation to our data. The fluctuation of the largest fragment charge and of the asymmetry of the two and three largest fragments and their bimodal distribution have also been analysed., Comment: 6 pages, 4 figures, IX International Conference on Nucleus-Nucleus Collisions, Rio de Janeiro, Brazil, August 28 - September 1, 2006

Published
2007

8. In-flight emission of projectile Auger electrons from highly energetic heavy ions (20MeV/u<E<100MeV/u) colliding with carbon foils

Author

C. Volant, G. Lanzano, Hermann Rothard, S. Hagmann, and E. De Filippo

Subjects
Nuclear and High Energy Physics, Auger effect, Ion beam, Projectile, Nuclear Theory, chemistry.chemical_element, Ion, Nuclear physics, symbols.namesake, Superconducting cyclotron, chemistry, symbols, Electron beam processing, Physics::Accelerator Physics, Atomic physics, Nuclear Experiment, Instrumentation, Carbon, Beam (structure)
Abstract

Highly energetic projectiles (20 MeV/u E beam v beam (the ion beam velocity) and 2 v beam . Results obtained both at the Catania LNS superconducting cyclotron CS with 58 Ni 14+,19+ (23 and 45 MeV/u) and at Ganil with 78 Kr 32+,34+ (64 MeV/u) are presented. Absolute emission cross-sections and kinematic properties are discussed.

Published
2007

9. Isotopic yields of spallation residues produced inXe136-induced reactions on deuterium at500AMeV

Author

C. Volant, J. L. Rodriguez-Sanchez, C. Paradela, L. Audouin, Andreas Martin Heinz, O. Yordanov, Enrique Casarejos, L. Tassan-Got, D. Henzlova, P. Napolitani, C. Schmitt, C. Stephan, A. Lafriaskh, T. Enqvist, F. Farget, V. Henzl, Juan Antonio Alcantara-Nunez, S. Leray, C. Villagrasa, J. Pereira, A. Boudard, M. V. Ricciardi, J. Benlliure, A. Kelic-Heil, K.-H. Schmidt, C. Pérez-Loureiro, and M. Fernandez-Ordoñez

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Deuterium, Spectrometer, Projectile, Nuclear Theory, Monte Carlo method, Spallation, Nuclear Experiment
Abstract

Residual fragment production in reactions induced by $^{136}\mathrm{Xe}$ projectiles impinging on a liquid deuterium target at $500A$ MeV has been measured at GSI. Projectile residues were unambiguously identified in atomic and mass numbers using the Fragment Separator as high-resolution zero-degree spectrometer. The isotopic production yields of these residuals were used to benchmark reference model calculations describing spallation reactions. In particular the energy dissipated in these reactions was assessed by comparing the production yields measured in this work with the ones obtained in reactions induced by $^{136}\mathrm{Xe}$ projectiles on protons at $1000A$ and $500A$ MeV.

Published
2015

10. Exclusive measurements on at 1AGev with the SPALADIN setup at GSI

Author

S. Pietri, A. Lafriakh, A. Le Fèvre, Thomas Aumann, S. Leray, M. Fernandez-Ordoñez, F. Rejmund, Michel Combet, W. F. J. Müller, W. Trautmann, C. Schwarz, Enrique Casarejos, E. Le Gentil, C.O. Bacri, Herbert A. Simon, J. Lukasik, J.E. Ducret, C. Sfienti, A. Boudard, O. Yordanov, K. Kezzar, R. Krücken, J. Benlliure, A. Kelic, C. Volant, Håkan T Johansson, T. Kurtukian-Nieto, M. Böhmer, and Roman Gernhäuser

Subjects
Physics, Nuclear and High Energy Physics, Photon, Time projection chamber, Ion beam, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, chemistry.chemical_element, 01 natural sciences, 7. Clean energy, Nuclear physics, chemistry, Hodoscope, Dipole magnet, 0103 physical sciences, Physics::Accelerator Physics, Neutron detection, Spallation, Atomic physics, Nuclear Experiment, 010306 general physics, Instrumentation, Helium
Abstract

A new type of spallation experiments has been carried out at GSI, Darmstadt (Germany) in order to understand the spallation mechanism in greater details. These experiments use the inverse-kinematics technique where the ion beam is directed onto a liquid Hydrogen target, allowing the detection of heavy spallation residues in coincidence with low center-of-mass energy light particles. The setup is based on A Large Acceptance DIpole magNet (ALADIN) coupled with a multitrack Time Projection Chamber (TPC), a hodoscope and a neutron detector. First, data on 56 Fe + p at 1 A GeV were taken in February 2004. In the on-going analysis, isotopic cross-sections have been determined and compared to data taken at the FRagment Separator in GSI. Mean values and width of residue velocity distributions have also been obtained as well as Helium production cross-section. First, coincidence data are being analyzed.

Published
2006

11. Validation of high-energy nuclear models: State-of-the-art and perspectives

Author

Joseph Cugnon, S. Pietri, Alain Boudard, Sylvie Leray, C. Volant, J.E. Ducret, Jean-Christophe David, and Eric Le Gentil

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, High energy, Systems engineering, Experimental data, Systems design, State (computer science), Instrumentation
Abstract

The state-of-the-art regarding the predicting capabilities of some of the physics models available in MCNPX for Accelerator-Driven System design is discussed. The identified remaining deficiencies, which originate either from a lack of experimental data or from not well understood physics mechanisms, are stressed. To solve these problems, more constraining experiments are now needed to allow a deeper understanding of the reaction mechanisms.

Published
2006

12. Recent extensions of the INCL4 model for spallation reactions

Author

Thierry Aoust, Jean-Christophe David, Sylvie Leray, Pierre Henrotte, C. Volant, Joseph Cugnon, and Alain Boudard

Subjects
Physics, Nuclear and High Energy Physics, Nuclear Theory, Blocking (statistics), Nuclear physics, symbols.namesake, Pauli exclusion principle, Pion, Low energy, Cascade, symbols, Cluster (physics), Spallation, Nuclear Experiment, Nucleon, Instrumentation
Abstract

New improvements of the INCL4 cascade model, bearing on cluster production, nucleon and pion potentials and Pauli blocking at low energy, are reviewed.

Published
2006

13. Evaporation residues produced in spallation of 208Pb by protons at

Author

S. Czajkowski, J. Pereira, P. Armbruster, M. Bernas, R. Legrain, M. Pravikoff, L. Tassan-Got, B. Mustapha, F. Rejmund, S. Leray, B. Fernández-Domínguez, A. Boudard, Christoph A. Stephan, J. Taieb, B. Jurado, C. Volant, M. V. Ricciardi, K.-H. Schmidt, L. Audouin, E. Casarejos, T. Enqvist, W. Wlazlo, and J. Benlliure

Subjects
Physics, Nuclear and High Energy Physics, Spectrometer, 010308 nuclear & particles physics, Evaporation, 01 natural sciences, Effective nuclear charge, Ion, Nuclear physics, Ionization, 0103 physical sciences, Isobaric process, Spallation, 010306 general physics
Abstract

The production cross sections of fragmentation-evaporation residues in the reaction Pb+p at 500 A MeV have been measured using the inverse-kinematics method and the FRS spectrometer (GSI). Fragments were identified in nuclear charge using ionisation chambers. The mass identification was performed event-by-event using the Bρ-TOF-ΔE technique. Although partially-unresolved ionic charge states induced an ambiguity on the mass of some heavy fragments, production rates could be obtained with a high accuracy by systematically accounting for the polluting ionic charge states. The contribution of multiple reactions in the target was subtracted using a new, partly self-consistent code. The isobaric distributions are found to have a shape very close to the one observed in experiments at higher energy. Kinematic properties of the fragments were also measured. The total and the isotopic cross sections, including charge-pickup cross sections, are in good agreement with previous measurements and models. The data are discussed in the light of previous spallation measurements, especially on lead at 1 GeV. © 2006 Elsevier B.V. All rights reserved.

Published
2006

14. Correlation functions of light charged particles from projectile-like fragment source in and 77 MeV 40Ar + 27Al collisions

Author

R. Nouicer, D. Mahboub, S. Cavallaro, M. Geraci, C. Volant, Christian Beck, G. Lanzano, R. Dayras, J Helgesson, E. C. Pollacco, Angelo Pagano, E. De Filippo, G. Politi, R. Ghetti, J.L. Charvet, and Sebastiano Aiello

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Deuterium, Projectile, Fragment (computer graphics), Nuclear Theory, Time sequence, Atomic physics, Nuclear Experiment, Resonance (particle physics), Charged particle
Abstract

Two-particle correlation functions, involving protons, deuterons, tritons, and α -particles, have been measured at very forward angles ( 0.7 ° ⩽ θ lab ⩽ 7 ° ), in order to study projectile-like fragment (PLF) emission in E / A = 44 and 77 MeV 40 Ar + 27 Al collisions. The observed correlations are similar for the two reactions at E / A = 44 and 77 MeV, except for peaks originating from resonance decays, which are larger at the lower bombarding energy. Particle-velocity gated correlation functions are presented, and possible implications on the time sequence of the light charged particles, emitted from the PLF, are discussed.

Published
2006

15. Very heavy fission fragments produced in the spallation reaction 238U+p at

Author

S. Leray, K.-H. Schmidt, T. Enqvist, Enrique Casarejos, J. Taieb, C. Volant, P. Armbruster, M. V. Ricciardi, M. Bernas, C. Stephan, J. Pereira, A. Kelic, J. Benlliure, A. Boudard, L. Tassan-Got, R. Legrain, and F. Rejmund

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Cold fission, Cluster decay, Isotope, 010308 nuclear & particles physics, Fission, Fission product yield, 01 natural sciences, Nuclear physics, 0103 physical sciences, Spallation, Neutron, 010306 general physics
Abstract

Fission fragments from 1 A GeV 238U ions impinging a hydrogen target are investigated by using the fragment separator FRS for magnetic selection of reaction products including ray-tracing, and ΔE-ToF techniques. On the basis of the kinematics of the fragments, binary fission can be assigned as production process up to very heavy fragments. Fission fragments are separated and identified as far as 184Re for the first time. Cross sections are measured and found in the range of 500 μb to 5 μb. Isobaric cross sections decrease smoothly with increasing masses. Beyond tungsten, fission fragments are hidden in the more abundant spallation evaporation residues. 283 isotopes of elements gadolinium to rhenium in the mass range 147 to 184 are observed and cross sections measured. All the fragments are formed by fission of excited parent nuclei following emission of a cascade of secondary neutrons.

Published
2006

16. Multifragmentation of very heavy nuclear systems (III): Fragment velocity correlations and event topology at freeze-out

Author

R. Dayras, P. Lautesse, L. Nalpas, J.D. Frankland, B. Borderie, M.F. Rivet, C. Volant, D. Guinet, M. Pârlog, E. Galichet, N. Le Neindre, Eric Bonnet, S. Salou, Mariano Vigilante, Elio Rosato, O. Lopez, E. Vient, G. Tabacaru, R. Bougault, J.P. Wieleczko, L. Manduci, R. Roy, A. Chbihi, Piotr Pawłowski, B. Tamain, Bertrand Bouriquet, 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), National Institute for Physics and Nuclear Engineering (NIPNE), NIPNE, 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), 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, 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), 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), H. Niewodniczanski Institute of Nuclear Physics, Polska Akademia Nauk = Polish Academy of Sciences (PAN), Dipartimento di Scienze Fisiche e Sezione INFN, Istituto Nazionale di Fisica Nucleare (INFN)-University of Naples Federico II = Università degli studi di Napoli Federico II, Département de Physique, Université Laval [Québec] (ULaval), INDRA Collaboration, 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)-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)-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), and Istituto Nazionale di Fisica Nucleare (INFN)-Università degli studi di Napoli Federico II

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Fragment (computer graphics), FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Kinetic energy, 7. Clean energy, 01 natural sciences, Spectral line, Nuclear physics, 0103 physical sciences, Nuclear Experiment (nucl-ex), 25.70.-z, 25.70.Pq, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Event (particle physics), Topology (chemistry), Excitation
Abstract

Kinetic energy spectra and fragment velocity correlations, simulated by means of stochastic mean-field calculations, are successfully confronted with experimental data for single multifragmenting sources prepared at the same excitation energy per nucleon in 32 AMeV 129Xe+natSn and 36 AMeV 155Gd+natU central collisions. Relying thus on simulations, average freeze-out times of 200-240 fm/c are estimated The corresponding spatial distributions of fragments are more compact for the lighter system (~3-4V\_0 vs ~8V\_0)., 20 pages; 9 figures; To be published in Nuclear Physics A

Published
2006

17. Impact of high-energy nuclear data on radioprotection in spallation sources

Author

C. Villagrasa, S. Leray, A. Boudard, J. C. David, L. Donadille, and C. Volant

Subjects
Neutrons, Radioisotopes, Physics, High energy, Radiation, Radiological and Ultrasound Technology, Nuclear engineering, Public Health, Environmental and Occupational Health, Experimental data, Nuclear data, Equipment Design, General Medicine, Radiation Dosage, Risk Assessment, Nuclear physics, Radiation Protection, Containment, Radiation Monitoring, Risk Factors, Radiology, Nuclear Medicine and imaging, Spallation, Neutron, Algorithms, Software
Abstract

The high-energy programme of the HINDAS European project has provided a large amount of experimental data and led to a better understanding of the spallation reaction mechanism and the development of more reliable spallation models. These data, or the new models, which have been implemented into high-energy transport codes, can be now used to predict with a larger confidence or, at least with a known uncertainty, some important quantities for the design of spallation sources. In this paper, examples concerning the residue production in a Pb-Bi target and the high-energy neutrons escaping the target are presented. In the first case, the activity and the amount of radioactive volatile elements that can be released, in case of a containment failure, are calculated and the level of confidence of the calculation is assessed. The second example shows that the models correctly predict the high-energy tail of the neutron spectrum, which is important for radioprotection in the facility.

Published
2005

18. Fast electron production in collisions of swift heavy ions (20MeV/u<E<100MeV/u) with foils of solids

Author

A. Anzalone, Hermann Rothard, G. Lanzano, N. Arena, C. Volant, A. Pagano, F. Giustolisi, E. De Filippo, and M. Geraci

Subjects
Nuclear physics, Nuclear and High Energy Physics, Superconducting cyclotron, Chemistry, Ionization, Electron, Atomic physics, Instrumentation, Beam (structure), Auger, Ion
Abstract

In nuclear and atomic experiments at high incident ion energies, 20 MeV/ u E u , the impact of swift heavy ions on thin solid targets is a source of fast electrons. The knowledge of their spatial and kinematical distributions is very useful for experimental nuclear and radiobiological applications as well as testing atomic ionization theories. An overview on the main mechanisms underlying the production of the electrons is given. Some recent results obtained at the Catania LNS superconducting cyclotron, mainly with a 45 MeV/ u 58 Ni 19+ beam are shown. In particular, the production and the properties of binary encounter-, convoy-, in-flight Auger- and backward emitted electrons are discussed.

Published
2005

19. Fermi shuttle acceleration in atomic collisions: the case of ion induced electron emission

Author

Hermann Rothard, E. De Filippo, C. Volant, and G. Lanzano

Subjects
Physics, Nuclear and High Energy Physics, Deuterium, Projectile, Perturbation (astronomy), Electron, Atomic number, Atomic physics, Nuclear Experiment, Instrumentation, Scaling, Fermi Gamma-ray Space Telescope, Ion
Abstract

The “Fermi shuttle” acceleration of electrons in ion–atom collisions, i.e. multiple collision sequences of electrons bouncing off the projectile and target nuclei, can lead to the emission of very energetic electrons (i.e. with velocities higher than the binary encounter electrons). We performed measurements of the evolution of the Fermi shuttle electron yield with the induced perturbation and the target atomic number. The yield increases with the perturbation parameter (ratio of projectile charge and projectile velocity q/vP), which was varied from q/vP ≈ 0.2 (weak perturbation) to q/vP ≈ 2 (strong perturbation). We also introduce a more realistic scaling parameter, which accounts for the re-bouncing of the electrons on target and projectile, and show that the yields increase as a function of this parameter. For a given projectile, the Fermi shuttle electron yield increases with the target atomic number. Furthermore, we show that the velocity distribution of the high-energy electrons is exponentially decreasing N(v) ∼ exp(−nv) and exhibits the same evolution of the slope n with projectile velocity as in the case of Fermi accelerated deuterons.

Published
2005

20. Nuclide cross-sections of fission fragments in the reaction 208Pb + p at 500 A MeV

Author

C. Volant, K.-H. Schmidt, F. Rejmund, B. Fernández-Domínguez, R. Legrain, M. Bernas, A. Boudard, C. Stephan, T. Enqvist, M. V. Ricciardi, M.S. Pravikoff, S. Czajkowski, L. Tassan-Got, B. Jurado, W. Wlazlo, J. Benlliure, J.-E. Ducret, J. Taieb, J. Pereira, P. Armbruster, Enrique Casarejos, S. Leray, B. Mustapha, L. Audouin, 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), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), 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 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), H. Goutte, H. Faust, G. Fioni, D. Goutte, 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
Spallation sources, Accelerator-driven systems, Nuclear and High Energy Physics, Fission, 24.75.+i, 25.85.Ge, 25.40.Sc, Nuclear Theory, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Recoil, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Nuclei identification, Recoil velocities, Spallation, Neutron, Nuclide, Nuclear Experiment, 010306 general physics, Physics, Fission products, 010308 nuclear & particles physics, 020206 networking & telecommunications, Spallation reaction, Physics::Accelerator Physics, 020201 artificial intelligence & image processing, Production of fission fragments, Excitation
Abstract

PACS conv.GSI; The isotopic distributions and recoil velocities of the fission fragments produced in the spallation reaction 208Pb + p at 500 A MeV have been measured using the inverse-kinematics technique, a lead beam onto a liquid-hydrogen target, and the high-resolution spectrometer FRS at GSI. The shapes of the different distributions are found in good agreement with previously published data while the deduced total fission cross-section is higher than expected from existing systematics and some previous measurements. From the experimental data, the characteristics of the average fissioning system can be reconstructed in charge, mass and excitation energy, and the average number of post-fission neutrons can be inferred. The results are also compared to different models describing the spallation reaction. The intranuclear cascade code INCL4 followed by the de-excitation code ABLA is shown to describe reasonably well the evolution of the isotopic distribution shapes between 500 and 1000 A MeV.

Published
2005

21. A new model for production of fast light clusters in spallation reactions

Author

Sylvie Leray, Alain Boudard, C. Volant, and Joseph Cugnon

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Drag, Cascade, Percolation, Phase space, Nuclear Theory, Mass spectrum, Cluster (physics), Spallation, Nuclear Experiment, Nucleon
Abstract

A model is proposed to describe emission of light charged clusters during the cascade stage in nucleon-induced spallation reactions. It consists in implementing a surface percolation procedure into the Liege intranuclear cascade (INCL4) model: when a nucleon is ready to leave the nuclear surface, it is allowed to drag along a cluster of nucleons, under some conditions of closeness in phase space. This possibility relies on the instantaneous dynamical phase space occupancy in the nuclear surface. The following clusters are considered: d,t, 3 He , 4 He . Good agreement is obtained with experimental data relative to heavy and medium-heavy targets at two different energies. It is shown that the implementation of light cluster emission in the cascade stage also improves our previous results for residue mass spectra.

Published
2004

22. Fast-electron ejection from C, Ni, Ag and Au foils by 36 Ar 18 + (95 MeV/u): Measurements of absolute cross-sections

Author

C. Volant, Sebastiano Aiello, A. Anzalone, G. Lanzano, F. Giustolisi, N. Arena, Hermann Rothard, A. Pagano, E. De Filippo, and M. Geraci

Subjects
Physics, Nuclear and High Energy Physics, Deflection (physics), Yield (chemistry), Nuclear fusion, Fermi acceleration, Electron, Atomic number, Atomic physics, Electron ionization, Spectral line
Abstract

Doubly differential electron velocity spectra induced by 36Ar18 + (95 MeV/u) from thin target foils (C, Ni, Ag, Au) were measured at GANIL (Caen, France) by means of the ARGOS multidetector and the time-of-flight technique. The main features observed in the forward spectra are convoy electrons, binary-encounter electrons, and (for the Au target only) a high-velocity tail which we attribute to a “Fermi shuttle” acceleration mechanism. Backward spectra do not show distinct structures. The spectra allow us to determine absolute singly differential cross-sections as a function of the target material and the emission angle. The convoy electron yield increases with the target atomic number, but for C their yield is so small that our experiment is not able to detect them. Absolute doubly differential cross-sections for binary-encounter electron ejection from C targets are well described by a transport theory which is based on the relativistic electron impact approximation (EIA) for electron production and which accounts for angular deflection, energy loss and energy straggling of the transmitted electrons.

Published
2004

23. Dynamics of spallation reactions investigated from production cross sections of residual nuclei in collisions induced by238U at 1 A·GeV on proton and deuterium

Author

Enrique Casarejos, S. Czajkowski, J. Benlliure, W. Wlazlo, K.-H. Schmidt, M. Bernas, M.S. Pravikoff, R. Legrain, L. Tassan-Got, T. Enqvist, A. Boudard, C. Stephan, F. Rejmund, J. Pereira, B. Mustapha, P. Armbruster, S. Leray, J. Taieb, and C. Volant

Subjects
Nuclear physics, Nuclear reaction, Physics, Nuclear and High Energy Physics, Fissility, Deuterium, Spectrometer, Proton, Spallation, Dissipation, Atomic physics, Nuclear Experiment, Excitation
Abstract

A systematic investigation of the isotopic cross sections of nuclear residues produced in the reactions238U (1 A GeV)+p,d has been performed with the high-resolution magnetic spectrometer FRS at GSI. The large range of excitation energies induced in these reactions, together with the high fissility of uranium-like systems constitute an optimum scenario to study the dynamics of spallation reactions. In particular, some fundamental questions connected to the role of dissipation and the onset of a break-up stage at high temperatures can be addressed with these data.

Published
2004

24. Intranuclear cascade+percolation+evaporation model applied to the12C+197Au system at 1 GeV/nucleon

Author

R. Dayras, K. Turzo, C. Schwarz, B. Tamain, W.F.J. Mu¨ller, A. Saija, Bertrand Bouriquet, F. Lavaud, Aladin Collaborations, Sylvie Hudan, Mariano Vigilante, E. Vient, J.L. Charvet, Diane Doré, W. Trautmann, A. Le Fe`vre, E. Plagnol, D. Durand, G. Auger, W. Seidel, E. Galichet, U. Lynen, R. Bougault, P. Lautesse, H. Orth, D. Gourio, Bernard Borderie, D. Guinet, L. Nalpas, B. Zwieglin´ski, C. Volant, Giuseppina Raciti, A. S. Botvina, O. Lopez, Elio Rosato, A. Chbihi, J. Łukasik, J.D. Frankland, G. Imme, M.L. Begemann-Blaich, A. Trzcin´ski, C. Sfienti, R. Bittiger, and J.C. Steckmeyer

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Cascade, Percolation, Evaporation, Nucleon
Abstract

The nucleus-nucleus Lie`ge intranuclear-cascade+percolation+evaporation model has been applied to the 12 C+ 197 Au data measured by the INDRA-ALADIN collaboration at GSI. After the intranuclear cascade stage, the data are better reproduced when using the Statistical Multiframentation Model as afterburner. Further checks of the model are done on data from the EOS and KAOS collaborations.

Published
2004

25. Fission-residues produced in the spallation reaction 238U + p at 1 A GeV

Author

F. Rejmund, Alain Boudard, Enrique Casarejos, S. Czajkowski, Laurent Tassan-Got, J. Taieb, Kjeld Schmidt, R. Legrain, M. Bernas, P. Armbruster, Timo Enqvist, J. Benlliure, J. Pereira, Sylvie Leray, M. V. Ricciardi, Christoph A. Stephan, B. Mustapha, C. Volant, P. Napolitani, 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 d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), and 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)

Subjects
Nuclear and High Energy Physics, TheoryofComputation_COMPUTATIONBYABSTRACTDEVICES, Hydrogen, Fission, Nuclear Theory, FOS: Physical sciences, chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMethodologies_ARTIFICIALINTELLIGENCE, 01 natural sciences, 7. Clean energy, Spectral line, Momentum, Nuclear physics, Recoil, 0103 physical sciences, Spallation, Nuclear Experiment (nucl-ex), Nuclear Experiment, 010306 general physics, Physics, 010308 nuclear & particles physics, Projectile, TheoryofComputation_GENERAL, 3. Good health, ComputingMethodologies_PATTERNRECOGNITION, chemistry
Abstract

Fission fragments from 1 A GeV 238U projectiles irradiating a hydrogen target were investigated by using the fragment separator FRS for magnetic selection of reaction products including ray-tracing and DE-ToF techniques. The momentum spectra of 733 identified fragments were analysed to provide isotopic production cross sections, fission-fragment velocities and recoil momenta of the fissioning parent nuclei. Besides their general relevance, these quantities are also demanded for applications. Calculations and simulations with codes commonly used and recently developed or improved are compared to the data., Comment: 60 pages, 21 figures, 4 tables, 2 appendices (15 pages)

Published
2003

26. Evaporation residues produced in the spallation reaction at 1 AGeV

Author

R. Legrain, F. Rejmund, K.-H. Schmidt, T. Enqvist, J. Benlliure, B. Mustapha, W. Wlazlo, E. Casarejos, C. Stephan, L. Tassan-Got, M.S. Pravikoff, S. Czajkowski, C. Volant, M. Bernas, A. Boudard, S. Leray, P. Armbruster, and J. Taieb

Subjects
Physics, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, Fission, chemistry.chemical_element, Uranium, Tungsten, 01 natural sciences, 7. Clean energy, Nuclear physics, Momentum, chemistry, 0103 physical sciences, Physics::Accelerator Physics, Spallation, Nuclide, Atomic number, Nuclear Experiment, 010306 general physics
Abstract

The production of heavy nuclides from the spallation-evaporation reaction of 238U induced by 1 GeV protons was studied in inverse kinematics. The evaporation residues from tungsten to uranium were identified in-flight in mass and atomic number. Their production cross-sections and their momentum distributions were determined. The data are compared with empirical systematics. A comparison with previous results from the spallation of 208Pb and 197Au reveals the strong influence of fission in the spallation of 238U.

Published
2003

27. Recent results on fast intermediate velocity electron production induced by 19 + 45 A MeV 58 Ni highly charged ions on thin solid targets

Author

C. Volant, Hermann Rothard, G. Lanzano, M. Geraci, Angelo Pagano, E. De Filippo, A. Anzalone, N. Arena, and F. Giustolisi

Subjects
Physics, Nuclear and High Energy Physics, Auger effect, Projectile, chemistry.chemical_element, Electron, Rest frame, Ion, symbols.namesake, chemistry, Excited state, symbols, Atomic physics, Instrumentation, Carbon, Beam (structure)
Abstract

In order to study the emission of energetic electrons induced by the impact of swift heavy ions on thin solid targets, we carried out a series of experiments at the superconducting cyclotron of the Catania Laboratori Nazionali del Sud. We report results on a recent experiment where electron–electron coincidences were measured in a forward ring by bombarding a thin carbon target of 7.4 μg/cm2 with 19+ 45 A MeV 58Ni beam. The velocity1–velocity2 bidimensional plot is dominated by events in which the two detected electrons have a velocity close to the beam velocity 9.03 cm/ns (convoy electrons). The remaining small fraction of coincidences has still a convoy electron and a second electron having either a velocity almost twice the beam velocity 16.5 cm/ns (binary encounter, BE electrons) or a velocity of about 12.7 cm/ns intermediate between BE and convoy velocities (IV electrons). We interprete this last intermediate component as due to in-flight de-excitation of highly excited n+58Ni ions by Auger electrons. Although less distinct, we observe also an intense peak close to the convoy velocity peak, centered at ≈9.7 cm/ns, corresponding to electrons emitted with an energy of only about ≈170 eV in the projectile rest frame of reference.

Published
2003

28. Energy calibration for the INDRA multidetector using recoil protons from scattering

Author

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

Subjects
Physics, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, Scattering, Calibration curve, Nuclear Theory, 01 natural sciences, 7. Clean energy, Spectral line, Nuclear physics, Recoil, Coincident, 0103 physical sciences, Calibration, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Instrumentation
Abstract

An efficient method of energy scale calibration for the CsI(Tl) modules of the INDRA multidetector (rings 6–12) using elastic and inelastic 12C+1H scattering at E(12C)=30MeV per nucleon is presented. Background-free spectra for the binary channels are generated by requiring the coincident detection of the light and heavy ejectiles. The gain parameter of the calibration curve is obtained by fitting the proton total charge spectra to the spectra predicted with Monte-Carlo simulations using tabulated cross section data. The method has been applied in multifragmentation experiments with INDRA at GSI.

Published
2003

29. Isospin Diffusion in $^{58}$Ni-Induced Reactions at Intermediate Energies

Author

R. Dayras, C. Volant, N. Le Neindre, D. Durand, E. Galichet, M. Parlog, D. Guinet, J.P. Wieleczko, M. F. Rivet, Maria Colonna, A. Chbihi, L. Manduci, J.D. Frankland, R. Bougault, Mariano Vigilante, E. Vient, B. Borderie, O. Lopez, Elio Rosato, P. Lautesse, E., Galichet, M. F., Rivet, B., Borderie, M., Colonna, R., Bougault, D., Durand, N., LE NEINDRE, O., Lopez, L., Manduci, E., Vient, A., Chbihi, J. D., Frankland, J. P., Wieleczko, R., Dayra, C., Volant, D. C. R., Guinet, P., Lautesse, M., Parlog, Rosato, Elio, Vigilante, Mariano, 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), Conservatoire National des Arts et Métiers [CNAM] (CNAM), Laboratori Nazionali del Sud (LNS), Istituto Nazionale di Fisica Nucleare (INFN), 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 Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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), Dipartimento di Scienze Fisiche e Sezione INFN, Istituto Nazionale di Fisica Nucleare (INFN)-Università degli studi di Napoli Federico II, INDRA, 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), 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), 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), and Istituto Nazionale di Fisica Nucleare (INFN)-University of Naples Federico II = Università degli studi di Napoli Federico II

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), 010308 nuclear & particles physics, Nuclear Theory, General Physics and Astronomy, FOS: Physical sciences, Function (mathematics), Dissipation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Symmetry (physics), isospin, fisica nucleare, Isospin, 0103 physical sciences, Incident energy, reazioni nucleari, Atomic physics, Diffusion (business), Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Nuclear density
Abstract

Isospin diffusion is probed as a function of the dissipated energy by studying two systems 58 Ni +58 Ni and 58 Ni +197 Au , over the incident energy range 52-74A MeV. Experimental data are compared with the results of a microscopic transport model with two different parameterizations of the symmetry energy term. A better overall agreement between data and simulations is obtained when using a symmetry term with a potential part linearly increasing with nuclear density. The isospin equilibration time at 52 A MeV is estimated to 130 ± 10 fm/c.

Published
2010

30. Exploring isospin effects on the level density parameter

Author

P. Marini, M. F. Rivet, B. Borderie, N. Le Neindre, A. Chbihi, G. Verde, J. P. Wieleczko, J. D. Frankland, J. Moisan, E. Bonnet, E. Galichet, J. L. Charvet, R. Dayran, L. Nalpas, C. Volant, D. Guinet, P. Lautesse, R. Bougault, B. Taman, E. Vient, R. Roy, M. Bruno, M. D’Agostino, E. Geraci, B. Guiot, G. Vannini G. Casini, A. Olmi G. Poggi, F. Gramegna, M. Parlog, ROSATO, ELIO, SPADACCINI, GIULIO, VIGILANTE, MARIANO, 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), 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), Istituto Nazionale di Fisica Nucleare, Sezione di Catania (INFN), Università degli studi di Catania = University of Catania (Unict), L. Bonneau, N. Dubray, F. Gunsing, B. Jurado, INDRA, VAMOS, L. Bonneau, N. Dubray, F. Gunsing and B. Jurado, P., Marini, M. F., Rivet, B., Borderie, N., Le Neindre, A., Chbihi, G., Verde, J. P., Wieleczko, J. D., Frankland, J., Moisan, E., Bonnet, E., Galichet, J. L., Charvet, R., Dayran, L., Nalpa, C., Volant, D., Guinet, P., Lautesse, R., Bougault, B., Taman, E., Vient, R., Roy, Rosato, Elio, Spadaccini, Giulio, Vigilante, Mariano, M., Bruno, M., D’Agostino, E., Geraci, B., Guiot, G. Vannini G., Casini, A. Olmi G., Poggi, F., Gramegna, M., Parlog, 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), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Università degli studi di Catania [Catania]

Subjects
Coupling, Physics, Mass asymmetry, reazioni nucleari isospin densità dei livelli, 010308 nuclear & particles physics, QC1-999, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Entrance channel, Nuclear physics, Isospin, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Atomic physics, 010306 general physics, Nuclear Experiment
Abstract

International audience; Ar+Ni reactions have been studied to fix some constraints on the isospin dependence of the level density. The coupling of INDRA and VAMOS apparatuses allows to obtain highly exclusive data . The preliminary results on the Ar+Ni fusion-evaporation cross sections suggest a dependence on the entrance channel mass asymmetry.

Published
2010

31. Exploring isospin effects on the level density parameter and the density dependence of the simmetry energy

Author

P. Marini, B. Borderie, A. Chbihi, N. Le Neindre, M. F. Rivet, J. P. Wieleczko, M. Zoric, J. D. Frankland, J. Moisan, E. Bonnet, G. Verde, E. Galichet, J. L. Charvet, R. Dayran, L. Nalpas, C. Volant, D. Guinet, P. Lautesse, R. Bougault, B. Taman, E. Vient, R. Roy, M. Bruno, M. D’Agostino, E. Geraci, B. Guiot, G. Vannini, G. Casini, A. Olmi, G. Poggi, F. Gramegna, M. Parlog, ROSATO, ELIO, SPADACCINI, GIULIO, VIGILANTE, MARIANO, J.D.Frankland, A.Pagano, S.Pirrone, M.F.Rivet, F.Rizzo, P., Marini, B., Borderie, A., Chbihi, N., Le Neindre, M. F., Rivet, J. P., Wieleczko, M., Zoric, J. D., Frankland, J., Moisan, E., Bonnet, G., Verde, E., Galichet, J. L., Charvet, R., Dayran, L., Nalpa, C., Volant, D., Guinet, P., Lautesse, R., Bougault, B., Taman, E., Vient, R., Roy, Rosato, Elio, Spadaccini, Giulio, Vigilante, Mariano, M., Bruno, M., D’Agostino, E., Geraci, B., Guiot, G., Vannini, G., Casini, A., Olmi, G., Poggi, F., Gramegna, and M., Parlog

Published
2010

32. Impact of Various Models on the Prediction of Spallation Residue Yields and Target Activation

Author

J. C. David, S. Leray, Alain Boudard, L. Donadille, and C. Volant

Subjects
Nuclear physics, Nuclear and High Energy Physics, Residue (complex analysis), Nuclear Energy and Engineering, Cascade, Chemistry, Spallation, Irradiation, Nuclear Experiment
Abstract

Comparisons between the INCL4 cascade model, recently implemented in LAHET, and Bertini model are made in thin and thick lead targets. The impact of the cascade model used on the estimation of the target activity during its irradiation by a 1 GeV proton beam and its subsequent decay is discussed.

Published
2002

33. Measurements of Spallation Residues Using Inverse Kinematics at GSI

Author

R. Legrain, J. Pereira, Enrique Casarejos, J. Taieb, Laurent aurent-Tassan, Alain Boudard, Florence Vivés, C. Volant, Michel Pravikoff, F. Rejmund, Sylvie Leray, Brahim Mustapha, M. Bernas, Karl-Heinz Schmidt, Wojciech Wlazł, T. Enqvist, Serge Czajkowski, P. Armbruster, J. Benlliure, and C. Stephan

Subjects
Nuclear physics, Nuclear reaction, Nuclear and High Energy Physics, Nuclear Energy and Engineering, Inverse kinematics, Chemistry, Spallation
Abstract

The production cross sections and the kinematical properties of primary residual nuclei have been studied in reactions 197Au + p, 208Pb + p, d, 238U + p, d, and 238U + 208Pb at energies around 1 A GeV. The measured kinematical properties of the residues were also used to disentangle the relevant reaction mechanisms, spallation-evaporation and spallation-fission. The fragment separator FRS at GSI, Darmstadt, was used to separate and identify the reaction products. The measured quantities are important for the design and planning of future radioactive-beam facilities and accelerator-driven systems.

Published
2002

34. Improvements of Intra-Nuclear Cascade Model Stimulated by Recent Spallation Data

Author

Joseph Cugnon, C. Volant, Alain Boudard, and S. Leray

Subjects
Physics, Nuclear and High Energy Physics, Proton, Nuclear Theory, XX, Nuclear physics, symbols.namesake, Pauli exclusion principle, Nuclear Energy and Engineering, Cascade, symbols, Neutron source, Neutron, Spallation, Nuclear Experiment, Nuclear density, Excitation
Abstract

In high-energy transport codes used to design Accelerator Driven Systems or spallation neutron sources, elementary interactions are computed through nuclear physics models. Among these, Intra-Nuclear Cascade models play a major role since the excitation energy at the end of the INC stage determines the number of evaporated particles. Therefore, in simulation of spallation targets, INC influences the total number of emitted neutrons and the isotopic distribution of produced nuclei. Recent data regarding the production of neutrons and residual nuclei in proton induced reactions make it possible to test the reliability of INC models and to improve them. A new version (INCL4) of the Liege INC model including especially a realistic nuclear density and a consistent treatment of the Pauli principle is presented.

Published
2002

35. Primary-residue production cross sections and kinetic energies in 1AGeV 208Pb on deuteron reactions

Author

F. Rejmund, M.S. Pravikoff, J. Taieb, J. Benlliure, C. Stephan, S. Leray, B. Mustapha, M. Bernas, P. Armbruster, R. Legrain, A. Boudard, L. Tassan-Got, T. Enqvist, W. Wlazlo, C. Volant, F. Vivés, K.-H. Schmidt, and S. Czajkowski

Subjects
Nuclear physics, Nuclear reaction, Physics, Nuclear and High Energy Physics, Reaction mechanism, Residue (chemistry), Deuterium, Recoil velocity, Mass spectrum, Charge density, Kinetic energy
Abstract

The production cross sections and the kinematical properties of primary residual nuclei have been studied in the reaction 208 Pb(1 A GeV)+d. Isotopic distributions were measured for all elements from titanium ( Z =22) to lead ( Z =82). The measured kinematical properties of the residues were also used to disentangle the relevant reaction mechanisms, spallation–evaporation and spallation–fission. The fragment separator FRS at GSI, Darmstadt, was used to separate and identify the reaction products. The measured quantities are important for the design and planning of future radioactive-beam facilities and accelerator-driven systems. The measured data of the present work are comprehensively compared with the experimental data from the reaction 208 Pb(1 A GeV)+p.

Published
2002

36. Experimental study on the production of light nuclei in spallation–fission reactions and projectile fragmentation of 238U

Author

T. Enqvist, B. Mustapha, K.-H. Schmidt, F. Rejmund, J. Benlliure, M. V. Ricciardi, S. Czajkowski, M.S. Pravikoff, L. Tassan-Got, R. Legrain, A. Boudard, S. Leray, P. Armbruster, C. Volant, M. Bernas, C. Stephan, Robert, Suzanne, 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 d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), and 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)

Subjects
Physics, Nuclear and High Energy Physics, Reaction mechanism, Isotope, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], 010308 nuclear & particles physics, Fission, Nuclear Theory, chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Uranium, 7. Clean energy, 01 natural sciences, Nuclear physics, chemistry, 0103 physical sciences, Spallation, Nuclide, Atomic physics, Nuclear Experiment, 010306 general physics, Projectile fragmentation, Beam (structure)
Abstract

With the inverse kinematics method, the reaction mechanism which leads to the formation of light nuclides was investigated with a 1 A GeV 238 U beam impinging on a liquid H 2 target. Isotopes of all elements with Z ⩾6 were unambiguously identified, and the velocity of every produced nuclide was measured with great precision. Results show that very asymmetric fission of uranium nuclei produces neutron-rich isotopes of elements down to around charge 10. When uranium interacts with heavier nuclei the features of the reaction change drastically: while fission is the main mechanism for the production of light masses in 1 A GeV 238 U on H 2 , projectile fragmentation plays a dominant role in 1 A GeV 238 U on Ti leading to the formation of stable or neutron-deficient isotopes of all elements.

Published
2002

37. Isotopic production cross sections of heavy residues from reactions of 238U(1 GeV) on protons and deuterons relevant for RNB production

Author

Enrique Casarejos, S. Leray, J. Taieb, P. Armbruster, W. Wlazlo, J. Benlliure, A. Boudard, C. Stephan, M.S. Pravikoff, T. Enqvist, B. Mustapha, S. Czajkowski, C. Volant, R. Legrain, L. Tassan-Got, F. Rejmund, K.-H. Schmidt, and M. Bernas

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Primary reaction, Deuterium, law, Physics::Accelerator Physics, Atomic number, Nuclear Experiment, Beta decay, Isotope separation, law.invention
Abstract

A large experimental program has been initiated at GSI to determine the production cross sections of heavy residues in relativistic heavy-ion collisions. The complete isotopic distributions of spallation–evaporation residues of the reactions induced by 1 GeV protons and 2 GeV deuterons in 238U are presented. The primary reaction products were fully identified in mass and atomic number prior to beta decay by using the fragment separator FRS. These data provide basic information to estimate the intensities of radioactive nuclear beams to become available in future RNB facilities using isotope separation on-line (ISOL) or in-flight separation techniques.

Published
2002

38. Isospin diffusion in 58Ni-induced reactions at intermediate energies. I. Experimental results

Author

E. Galichet, M. F. Rivet, B. Borderie, M. Colonna, R. Bougault, A. Chbihi, R. Dayras, D. Durand, J. D. Frankland, D. C. R. Guinet, P. Lautesse, N. Le Neindre, O. Lopez, L. Manduci, M. Parlog, B. Tamain, E. Vient, C. Volant, J. P. Wielezcko, ROSATO, ELIO, E., Galichet, M. F., Rivet, B., Borderie, M., Colonna, R., Bougault, A., Chbihi, R., Dayra, D., Durand, J. D., Frankland, D. C. R., Guinet, P., Lautesse, N., Le Neindre, O., Lopez, L., Manduci, M., Parlog, Rosato, Elio, B., Tamain, E., Vient, C., Volant, and J. P., Wielezcko

Subjects
Isospin, reazioni nucleari, frammenti di massa intermedia, particelle leggere
Published
2009

39. Isotopic yields and kinetic energies of primary residues in 1 A GeV 208Pb+p reactions

Author

M. Bernas, W. Wlazlo, S. Leray, J. Benlliure, B. Mustapha, A. Boudard, R. Legrain, F. Rejmund, C. Volant, T. Enqvist, J. Taieb, P. Armbruster, M.S. Pravikoff, C. Stephan, S. Czajkowski, L. Tassan-Got, K.-H. Schmidt, 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 d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), and 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)

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Reaction mechanism, 010308 nuclear & particles physics, Fission, Nuclear Theory, chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Kinetic energy, 7. Clean energy, 01 natural sciences, Nuclear physics, chemistry, Fragmentation (mass spectrometry), 0103 physical sciences, Physics::Accelerator Physics, Spallation, Nuclear Experiment, 010306 general physics, Projectile fragmentation, Titanium
Abstract

The production of primary residual nuclei in the reaction 1 A GeV 208Pb on proton has been studied by measuring isotopic distributions for all elements from titanium (Z=22) to lead (Z=82). Kinematical properties of the residues were also determined and used to disentangle the relevant reaction mechanisms, spallation (projectile fragmentation) and fission. The fragment separator FRS at GSI, Darmstadt, was used to separate and identify the reaction products. The measured production cross sections are highly relevant for the design of accelerator-driven subcritical reactors and for the planning of future radioactive-beam facilities.

Published
2001

40. Light charged particle and neutron velocity spectra in coincidence with projectile fragments in the reaction 40Ar(44A )+

Author

M. L. Sperduto, R. Dayras, A. Cunsolo, A. Pagano, R. Legrain, A. Foti, R. Fonte, C. Volant, M. Geraci, G. Lanzano, E. De Filippo, Sebastiano Aiello, and J.L. Charvet

Subjects
Physics, Nuclear and High Energy Physics, Thermalisation, Projectile, Proton temperature, Light particle, Neutron, Atomic physics, Nuclear Experiment, Coincidence, Charged particle, Spectral line
Abstract

We present a three source analysis of velocity spectra of light charged particles (LCP) and neutrons emitted in the reaction 40 Ar+ 27 Al at 44 A MeV . The light particle (LP) velocity spectra are studied as a function of the detection angle (1.5° θ 3 He, 4 He, d , t ratios and the PLF proton temperature parameter. The characteristics of the PLF sources are derived. Present results are discussed with regards to the degree of thermalization which could be achieved in the PLF and TLF sources.

Published
2001

41. Isotopic effects and collective flow at intermediate energies

Author

J. Lukasik, W. Trauttmann, G. Auger, M. L. Begemann Blaich, N. Bellaize, R. Bittiger, F. Bocage, B. Borderie, R. Bougault, B. Bouriquet, J. L. Charvet, A. Chbihi, R. Dayras, D. Durand, J. D. Frankland, E. Galichet, D. Gourio, D. Guinet, S. Hudan, P. Lautesse, F. Lavaud, A. Le Fèvre, R. Legrain, O. Lopez, U. Lynen, W. F. J. Müller, L. Nalpas, H. Orth, M. Parlog, E. Plagnol, M. F. Rivet, A. Saija, C. Schwarz, C. Sfienti, J. C. Steckmeyer, B. Tamain, A. Trzcinski, K. Turzó, E. Vient, C. Volant, B. Zwieglinski, ROSATO, ELIO, VIGILANTE, MARIANO, B.Borderie, J.D.Frankland, A.Pagano, S.Pirrone, F.Rizzo, J., Lukasik, W., Trauttmann, 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, A., Le Fèvre, R., Legrain, O., Lopez, U., Lynen, W. F. J., Müller, L., Nalpa, H., Orth, M., Parlog, E., Plagnol, M. F., Rivet, Rosato, Elio, A., Saija, C., Schwarz, C., Sfienti, J. C., Steckmeyer, B., Tamain, A., Trzcinski, K., Turzó, E., Vient, Vigilante, Mariano, C., Volant, and B., Zwieglinski

Published
2008

42. Prompt light particle emission in the 36Ar + 58Ni reaction at 95 MeV/nucleon

Author

Ph. Buchet, D. Guinet, J.L. Laville, Ch.O. Bacri, L. Nalpas, J.L. Charvet, J.P. Wieleczko, A. Chbihi, R. Bougault, J. Colin, D. Doré, J.D. Frankland, A. M. Maskay, M.F. Rivet, G. Tabacaru, C. Volant, J.C. Steckmeyer, Jean Péter, D. Cussol, P. Lautesse, Bernard Borderie, L. Tassan-Got, D. Durand, G. Auger, R. Dayras, F. Bocage, S. Salou, N. Bellaize, E. Genouin-Duhamel, O. Lopez, Elio Rosato, E. Plagnol, A.D. Nguyen, M. Louvel, N. Le Neindre, O. Tirel, M. Stern, E. Galichet, E. Gerlic, B. Tamain, F. Saint-Laurent, E. Vient, Piotr Pawłowski, A. Demeyer, M. Pârlog, R. Brou, R. Legrain, J.F. Lecolley, 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), 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 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), INDRA, 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), Normandie Université (NU)-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
Physics, Coalescence (physics), Nuclear and High Energy Physics, 24.10.-i, 25.70.Lm, 25.70.Pq, Multifragment emission and correlations, 010308 nuclear & particles physics, Hadron, Nuclear-reaction models and methods, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Strongly damped collisions, Spectral line, Charged particle, Nuclear physics, Cascade, 0103 physical sciences, Nuclear fusion, Impact parameter, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon
Abstract

Matière Nucléaire; International audience; The prompt component at intermediate velocity of light charged particles is investigated. An improved coalescence model coupled to the intra-nuclear cascade code ISABEL is used to obtain light complex particle energy spectra and multiplicities as a function of impact parameter. The results are compared with experimental data from the 36Ar + 58Ni experiment at 95 MeV/nucleon, performed with the INDRA 4π detection system. The calculated prompt component is found to rather well reproduce proton spectra. For complex light charged particles the calculated components well populate the high energy part of spectra. Prompt emission can therefore explain the large transverse energies experimentally observed at mid-rapidity.

Published
2000

43. Cross Sections of Spallation Residues Produced in1AGeVP208bon Proton Reactions

Author

F. Rejmund, M. Bernas, S. Leray, J. Benlliure, C. Stephan, J. Taieb, K.-H. Schmidt, A. Boudard, M.S. Pravikoff, S. Czajkowski, P. Armbruster, R. Legrain, L. Tassan-Got, W. Wlazlo, B. Mustapha, C. Volant, and T. Enqvist

Subjects
Nuclear physics, Physics, Recoil, 010308 nuclear & particles physics, 0103 physical sciences, General Physics and Astronomy, Spallation, Nuclear Experiment, 010306 general physics, Nucleon, Kinetic energy, 01 natural sciences
Abstract

Spallation residues produced in 1 GeV per nucleon ${}^{208}\mathrm{Pb}$ on proton reactions have been studied using the Fragment Separator facility at GSI. Isotopic production cross sections of elements from ${}_{61}\mathrm{Pm}$ to ${}_{82}\mathrm{Pb}$ have been measured down to 0.1 mb with a high accuracy. The recoil kinetic energies of the produced fragments were also determined. The obtained cross sections agree with most of the few existing gamma-spectroscopic data. The data are compared with different intranuclear-cascade and evaporation-fission models. Drastic deviations were found for a standard code used in technical applications.

Published
2000

44. Mass scaling of reaction mechanisms in intermediate energy heavy ion collisions

Author

R. Dayras, A. Demeyer, M. Parlog, B. Tamain, F. Saint-Laurent, Ch.O. Bacri, O. Lopez, Elio Rosato, M.F. Rivet, C. Volant, D. Durand, R. Brou, G. Auger, P. Ecomard, J.L. Charvet, T. Reposeur, L. Lebreton, Bernard Borderie, Richard Laforest, M. Louvel, D. Cussol, V. Métivier, J.F. Lecolley, N. Marie, F. Bocage, R. Legrain, Ph. Eudes, A. Rahmani, L. Tassan-Got, J.C. Steckmeyer, J. Colin, E. Plagnol, A. Le Fèvre, L. Nalpas, R. Bougault, D. Doré, J.P. Wieleczko, D. Gourio, J. Benlliure, P. Lautesse, Ph. Buchet, D. Guinet, Jean Péter, J. L. Laville, A. Chbihi, E. Vient, Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), 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 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), 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), INDRA, Mines Nantes (Mines Nantes)-Université de Nantes (UN)-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 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), 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, Physics, Nuclear and High Energy Physics, Reaction mechanism, Hot nuclei, 010308 nuclear & particles physics, Reaction mechanisms, Binary number, Decay properties, Energy deposit, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Mass scaling, Nuclear physics, 25.70.-z, Intermediate energy, 0103 physical sciences, Heavy ion, Nuclear reactions, Atomic physics, Nuclear Experiment, 010306 general physics, Energy (signal processing), Continuous evolution
Abstract

Matière Nucléaire, GANIL E209, GANIL E210; International audience; Reaction mechanisms have been studied for two nearly symmetrical systems of different total mass, between 25 and 74 AMeV. It is shown that collisions are mostly binary whatever the system mass and the bombarding energy. From the slowing-down of the partners, it is possible to establish the continuous evolution from quasielastic to (completely) damped collisions. It turns out that results are independent of the total system mass if involved energies are expressed in AMeV. The occurrence of mid-rapidity emission is also considered and may be used to establish a link between mechanisms observed at low and high bombarding energy. Part of it corresponds to a fast decay of outgoing partners.

Published
2000

45. Evaporation residue as a dominant exit channel at high thermal energies in + Ag reactions

Author

K.B. Morley, D. S. Bracken, J. Brzychczyk, Joseph Cugnon, C. Volant, V. E. Viola, E. C. Pollacco, K. Kwiatkowski, Ralph G. Korteling, N.R. Yoder, R. Legrain, E. Renshaw Foxford, and H. Breuer

Subjects
Physics, Nuclear and High Energy Physics, Residue (complex analysis), Nuclear Theory, Thermal, Evaporation, Solid angle, Atomic physics, Nuclear Experiment, Nucleon, Charged particle, Excitation, Ion
Abstract

In the reaction 3 He (1.8 GeV) + nat Ag , events are observed with a heavy fragment (HF), A≥10 , in coincidence with charged particles detected over 70% of 4π solid angle. Calorimetric measurements show high thermal excitation energies of the target primary fragment: 6–8 MeV per nucleon for HF mass ≳45 . For these excitation energies, the probability for having an evaporative residue is shown to be unexpectedly high when compared with current multifragmentation models. This result is interpreted as linked to the use of light ion projectiles at relatively low incident energy.

Published
2000

46. Spallation study with proton beams around 1 GeV: neutron production

Author

J.E. Thun, F. Borne, Estebán Ma Martinez, Jean Paul Schapira, S. I. Meigo, S. Crespin, D.M. Whittal, F. Brochard, Dominique Durand, E. Petibon, Ludwik Kowalski, P. Pras, J.F. Lecolley, C. Lebrun, C. Volant, S. Ménard, Francis Hanappe, J.M. Durand, Alain Boudard, D. Drake, W. Wlazlo, Sylvie Leray, X. Ledoux, Y. Patin, J. Fréhaut, G. Milleret, R. Legrain, M. Uematsu, F. Lefebvres, François René Lecolley, Y. Terrien, J.C. Duchazeaubeneix, C. Varignon, M. Louvel, F. Plouin, Louise Stuttge, 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), 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), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and 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)

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Proton, Nuclear Theory, 7. Clean energy, 01 natural sciences, 010305 fluids & plasmas, Nuclear physics, Cascade, 0103 physical sciences, Neutron cross section, Neutron, Spallation, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment, 010306 general physics
Abstract

Experiments performed at Lab. Nat. SATURNE on neutron produced by spallation from proton beams in the range 0.8 - 1.6 GeV are presented. Experimental data compared with codes show a significant improvement of the recent intra-nuclear cascade (J. Cugnon). This is also true in the same way for the neutron production from thick targets. However the model underestimates the energetic neutrons produced in the backward direction and other quantities as residual nuclei cross sections are not accurately predicted.

Published
2000

47. Fission investigations in Au+p collisions at 800 A MeV

Author

P. Armbruster, F. Farget, C. Stephan, C. Volant, M. Bernas, J.P. Dufour, K.-H. Schmidt, B. Mustapha, L. Tassan-Got, A. Boudard, R. Legrain, J. Benlliure, T. Enqvist, 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), and Frois B. Goutte D. Guillemaud-Mueller D.

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Cold fission, Cluster decay, 010308 nuclear & particles physics, Neutron emission, Fission, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Effective nuclear charge, Nuclear physics, 0103 physical sciences, Physics::Atomic and Molecular Clusters, Neutron, Atomic physics, Nuclear Experiment, 010306 general physics, Spontaneous fission
Abstract

Fission induced by 197 Au on proton collisions is investigated in order to study the nuclear viscosity in highly excited nuclear matter. The isotopic identification of the fission residues allows to determine the mean values of the mass number, nuclear charge and excitation energy of the fissioning nuclei at saddle. The comparison of these properties with statistical fission calculations evidences the role of the nuclear viscosity in the description of the fission dynamics.

Published
1999

48. Multifragmentation with GeV light-ion beams

Author

L. P. Remsberg, David S. Ginger, S. Gushue, Douglas J. Rowland, C. Volant, W. G. Lynch, L. Pienkowski, E. Renshaw Foxford, E. C. Pollacco, H. Breuer, K. B. Morley, T. Lefort, N.R. Yoder, V. E. Viola, J. Brzychezyk, E. Ramakrishnan, F. Gimeno-Nogues, G. Wang, W. C. Hsi, E. M. Winchester, R. Legrain, Richard Laforest, Ralph G. Korteling, A. Ruangma, D. S. Bracken, A. Botvina, Hongfei Xi, Sherry Yennello, E. Martin, W. A. Friedman, E. Cornell, M. B. Tsang, and Kris Kwiatkowski

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Antiproton beam, Atomic physics, Nuclear Experiment, Breakup, Deposition (chemistry), Ion
Abstract

Multifragmentation studies with GeV light-ion beams indicate that for the most violent collisions, complex fragments are emitted during expansion of the hot source, followed by near simultaneous breakup of the system near ρ/ρ 0 ∼ 1/3. The results are compared with hybrid INC/EES and INC/SMM models. Preliminary data for the 8 GeV/c π − and preactions on 197 Au show enhanced deposition energy for the antiproton beam.

Published
1999

49. Dynamical aspects of fragment production in heavy ion collisions

Author

E. Plagnol, G. Auger, M. Assenard, C.O. Bacri, J. Benlliure, E. Bisquer, B. Borderie, R. Bougault, R. Brou, J.L. Charvet, A. Chbihi, J. Colin, D. Cussol, R. Dayras, E. DeFilippo, A. Demeyer, D. Doré, D. Durand, Ph. Eudes, A. Genoux-Lubain, E. Gerlic, M. Germain, D. Gourio, D. Guinet, R. Laforest, P. Lautesse, J.L. Laville, L. Lebreton, C. LeBrun, C. Lebrun, J.F. Lecolley, A. LeFevre, T. Lefort, R. Legrain, O. Lopez, M. Louvel, L. Nalpas, N. Marie, V. Metivier, M. Parlog, J. Peter, O. Politi, E.C. Pollacco, A. Rahmani, R. Regimbart, T. Reposeur, E. Rosato, M.F. Rivet, F. Saint-Laurent, S. Salou, A. Siwek, M. Squalli, J.C. Steckmeyer, M. Stern, B. Tamain, L. Tassangot, O. Tirel, E. Vient, C. Volant, J.P. Wieleczko, A. Wieloch, and M. YuGang

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Fragment (logic), Heavy ion
Published
1999

50. Multifragmentation of very heavy nuclear systems: Fragment velocity correlations and event topology freeze-out

Author

G. TABACARU, M. F. RIVET, B. BORDERIE, M. PARLOG, B. BOURIQUET, A. CHBIHI, J. D. FRANKLAND, J. P. WIELEZCKO, E. BONNET, R. BOUGAULT, R. DAYRAS, E. GALICHET, D. GUINET, P. LAUTESSE, N. LE NEINDRE, L. MANDUCI, L. NALPAS, P. PAWLOWSKI, R. ROY, S. SALOU, B. TAMAIN, E. VIENT, M. VIGILANTE E. C. VOLANT, ROSATO, ELIO, G., Tabacaru, M. F., Rivet, B., Borderie, M., Parlog, B., Bouriquet, A., Chbihi, J. D., Frankland, J. P., Wielezcko, E., Bonnet, R., Bougault, R., Dayra, E., Galichet, D., Guinet, P., Lautesse, N., LE NEINDRE, L., Manduci, L., Nalpa, P., Pawlowski, Rosato, Elio, R., Roy, S., Salou, B., Tamain, E., Vient, and M. VIGILANTE E. C., Volant

Published
2006

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