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Your search keyword '"F. Cosmo"' showing total 4 results
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4 results on '"F. Cosmo"'

1. Energy damping and intermediate-velocity fragment emission in peripheral Kr+Au collisions at 43 MeV/u

Author

B. Bilwes, C. Le Brun, R. Bilwes, J.C. Steckmeyer, J.F. Lecolley, R. Bougault, F. Delaunay, D. Horn, J.L. Ferrero, M. Glaser, A. Genoux-Lubain, G. Rudolf, F. Scheibling, L. Stuttge, J. Colin, M. Louvel, F. Cosmo, and J.C. Adloff

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Fission, Fragment (computer graphics), Nuclear Theory, Evaporation, Collision, medicine.anatomical_structure, Dissipative system, medicine, Atomic physics, Nuclear Experiment, Nucleus
Abstract

Triple and four-fold coincidences among fragments have been measured in the reaction 84 Kr+Au at 43 MeV/u. All events showing the projectile-like nucleus and fission fragments of the target-like nucleus, and all events with one additional intermediate-velocity fragment, were analysed in the frame of a dissipative collision and a participant-spectator model. The mechanism is basically that of a dissipative collision but the emission of the intermediate velocity fragment by the target differs from an equilibrated evaporation.

Published
1992
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2. XYZt, a multidetector for fast intermediate-mass fragments

Author

F. Scheibling, M. Glaser, A. Kamili, G. Rudolf, R. Bilwes, F. Cosmo, B. Bilwes, Louise Stuttge, J.C. Adloff, Institut de Recherches Subatomiques (IReS), and 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)

Subjects
Nuclear reaction, Elastic scattering, Physics, Nuclear and High Energy Physics, Photon, Scattering, Cyclotron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Particle detector, law.invention, Nuclear magnetic resonance, law, Ionization, Measuring instrument, Atomic physics, Nuclear Experiment, Instrumentation
Abstract

XYZt is a multidetector specially designed to measure intermediate-mass fragments emitted at small angles (2° E A > 20 MeV/u . It consists of 12 independent modules which can be placed in any geometry. Each module is composed of an avalanche counter measuring time and position, and an ionisation chamber measuring an energy-loss. XYZt allows coincidence measurements in an angular range extending below the grazing angle. In experiments performed at GANIL, it detects Z > 4 fragments, separates the charges up to Z = 15, has a time resolution better than 1 ns and is transparent to light particles.

Published
1991
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3. Complete energy damping in 29 mev/nucleon Pb+Au two-body final-state reactions

Author

F. Lefebvres, J. Colin, D. Guerreau, J.F. Lecolley, M. Mahi, R. Brou, C. Paulot, J. Galin, A. Genoux-Lubain, J.L. Laville, G. Rudolf, M. Aboufirassi, F. Scheibling, C. Le Brun, F. Cosmo, A. Péghaire, J.C. Steckmeyer, B. Bilwes, M. Louvel, M. Morjean, Dominique Durand, D. Horn, O. Lopez, R. Bougault, D. Jacquet, A. Badala, L. Stuttge, Bernard Tamain, S. Tomasevic, 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 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), 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), Guesnon, Sandrine, Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Theory, Evaporation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Cross section (physics), Excited state, Dissipative system, Transient (oscillation), Atomic physics, Nuclear Experiment, Nucleon, Excitation
Abstract

Decay products emitted in highly dissipative Pb+Au reactions at 29 MeV/nucleon have been detected using a large area array. Multiplicities of fragments as large as 8 have been detected with a sizeable cross section. The m -fragment exit channels are fully compatible with the formation of a transient excited dinuclear system formed in damped collisions. The excitation energy function shows that fully damped collisions are achieved even for m = 2 indicating that heavy nuclei are able to sustain high excitation energy and end up as evaporation residues.

Published
1995

4. Collective expansion in central Au+Au collisions

Author

M. A. Lisa, T. Glasmacher, C. Williams, F. Rosenberger, W. C. Hsi, B. Ocker, I. Iori, B. Zwieglinski, A. Moroni, Wolfgang Müller, S. Tomasevic, M. Neumann, R. J. Charity, W. Seidel, A. Tucholski, J. Hubele, M. L. Begemann-Blaich, V. Serfling, Graham F. Peaslee, V. Lindenstruth, A. Wörner, C. Schwarz, J. Kempter, M. Mang, U. Lynen, P. Kreutz, W. Trautmann, G. Raciti, M. B. Tsang, R. Scardaoni, D. R. Bowman, L. Stuttge, H. Sann, W. D. Kunze, W. G. Lynch, C. A. Ogilvie, J. Pochodzalla, T. Hofmann, G. J. Kunde, L. G. Sobotka, C. K. Gelbke, A. Schüttauf, F. Cosmo, G. Imme, A. Ferrero, Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Heyd, Yvette

Subjects
Nuclear reaction, Physics, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Computer Science::Information Retrieval, General Physics and Astronomy, Charge (physics), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Breakup, Kinetic energy, Spectral line, Nuclear physics, Collective model, Atomic physics, Nuclear Experiment, Nucleon
Abstract

Energy spectra for intermediate mass fragments produced in central Au+Au collisions at [ital E]/[ital A]=100MeV indicate a collective expansion at breakup. For the first time, values for this collective expansion energy per nucleon are extracted independently for each charge. Typically, these values are one-third to one-half of the incident kinetic energy per nucleon in the c.m. system, but they decrease with [ital Z][sub [ital f]], suggesting that all fragments do not participate equally in the collective expansion.

Published
1994

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