Search

Your search keyword '"F. Cosmo"' showing total 15 results
Start Over Author "F. Cosmo"
15 results on '"F. Cosmo"'

1. Nuclear disassembly time scales using space-time correlations

Author

B. Bilwes, M. Louvel, J.L. Laville, R. Bougault, A. Péghaire, G. Rudolf, M. Aboufirassi, M. Mahi, F. Cosmo, C. Le Brun, O. Lopez, M. Morjean, J. Galin, J. Colin, A. Genoux-Lubain, C. Meslin, J.F. Lecolley, Dominique Durand, D. Guerreau, F. Scheibling, D. Horn, J.C. Steckmeyer, R. Brou, L. Stuttge, Bernard Tamain, S. Tomasevic, and D. Jacquet

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Excited state, Space time, Atomic physics, Nuclear Experiment, Interaction time
Abstract

The lifetime, τ, with respect to multifragmentation of highly excited nuclei is deduced from the analysis of strongly damped Pb + Au collisions at 29 MeV/u. The method is based on the study of space-time correlations induced by “proximity” effects between fragments emitted by the two primary products of the reaction and gives the time between the reseparation of the two primary products and the subsequent multifragment decay of one partner. A lifetime significantly longer than the interaction time is found. It is compared with time scales corresponding to different types of dynamical instabilities which may be responsible for nuclear disassembly.

Published
1995
Full Text
View/download PDF

2. 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
Full Text
View/download PDF

3. 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
Full Text
View/download PDF

4. Fragmentation pattern in sequential emission spectra

Author

G. RUDOLF, S. TOMASEVIC, M. ABOUFIRASSI, J. C. ADLOFF, B. BILWS, R. BILWS, G. BIZARD, R. BOUGAULT, R. BROU, Y. CASSAGNOU, J. COLIN, F. COSMO, F. DELAUNAY, D. DURAND, J. L. FERRERO, A. GENOUX LUBAIN, M. GLASER, F. GUILBAULT, G. M. JIN, J. L. LA VILLE, C. LE BRUN, C. LEBRUN, J. F. LECOLLEY, F. LEFBVRES, R. LEGRAIN, J. LEMIRE, O. LOPEZ, M. LOUVEL, M. MAHI, A. PGHAIRE, J. PTER, B. RASTEGAR, F. SCHEIBLING, J. C. STECKMEYER, L. STUTTG E. B. TAMAIN, ROSATO, ELIO, G., Rudolf, S., Tomasevic, M., Aboufirassi, J. C., Adloff, B., Bilw, R., Bilw, G., Bizard, R., Bougault, R., Brou, Y., Cassagnou, J., Colin, F., Cosmo, F., Delaunay, D., Durand, J. L., Ferrero, A., GENOUX LUBAIN, M., Glaser, F., Guilbault, G. M., Jin, J. L., LA VILLE, C., LE BRUN, C., Lebrun, J. F., Lecolley, F., Lefbvre, R., Legrain, J., Lemire, O., Lopez, M., Louvel, M., Mahi, A., Pghaire, J., Pter, B., Rastegar, Rosato, Elio, F., Scheibling, J. C., Steckmeyer, and L. STUTTG E. B., Tamain

Published
1993

5. Squeeze-out of nuclear matter in Au+Au collisions

Author

R. J. Charity, W. D. Kunze, V. Lindenstruth, B. Zwieglinski, Graham F. Peaslee, M. Mang, A. Wörner, J. Kempter, H. Sann, T. Rubehn, B. Ocker, M. A. Lisa, M. Neumann, G. Imme, W. Trautmann, P. Kreutz, V. Serfling, C. A. Ogilvie, J. Pochodzalla, M. B. Tsang, A. Moroni, R. Scardaoni, M. J. Huang, A. Schüttauf, L. G. Sobotka, U. Lynen, J. Hubele, C. K. Gelbke, D. R. Bowman, A. Tucholski, Pawel Danielewicz, W. C. Hsi, I. Iori, G. J. Kunde, Cornelius Schwarz, G. Raciti, W. G. Lynch, F. Cosmo, F. Rosenberger, W. Seidel, M. L. Begemann-Blaich, A. Ferrero, and Wolfgang Müller

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Nuclear matter
Abstract

M. L. Begemann-Blaich, F. Cosmo, A. Ferrero, J. Hubele, G. Imme, I. Iori, J. Kempter, P. Kreutz, G. J. Kunde, W. D. Kunze, V. Lindenstruth, U. Lynen, M. Mang, A. Moroni, W. F. J. Muller, M. Neumann, B. Ocker, C. A. Ogilvie, J. Pochodzalla, G. Raciti, F. Rosenberger, T. Rubehn, H. Sann, R. Scardaoni, A. Schuttauf, C. Schwarz, W. Seidel, V. Serfling, W. Trautmann, A. Tucholski, A. Worner, and B. Zwieglinski

Published
1996

6. 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

7. Properties of very excited nuclei

Author

Y. El Masri, D. Guerreau, R. Brou, A. Genoux-Lubain, F. Hanappe, R. Bougault, A. Péghaire, S. Tomasevic, D. Durand, J.L. Laville, F. Saint Laurent, G. Rudolf, J. Colin, A. Buta, Jean Péter, M. Morjean, C. Le Brun, G. Bizard, D. Jacquet, M. Mahi, B. Tamain, M. Louvel, Angela Badala, B. Bilves, T. Hamdani, J. Galin, F. Lefebvres, M. Aboufirassi, F. Scheibling, R. Regimbart, F. Cosmo, Oscar L. Lopez, D. Horn, T. Motobayashi, L. Stuttge, J.F. Lecolley, J.C. Steckmeyer, 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 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), Heyd, Yvette, and Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Excited state, Atomic physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
1995

8. 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

9. The decay of primary products in binary highly damped $^{208}$Pb +$^{197}$Au collisions at 29 mev per nucleon

Author

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

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Binary number, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Primary (astronomy), Excited state, 0103 physical sciences, Dissipative system, Atomic physics, Detector array, Nuclear Experiment, 010306 general physics, Excitation
Abstract

Events with fragment multiplicities up to eight have been detected with a large detector array in Pb + Au reactions at 29 MeV/u. All collisions show a binary character irrespective of a possible further disassembly of the two highly excited primary partners. For the most violent collisions, dissipative orbiting is observed as well as full energy damping corresponding to excitation energies as high as 6 MeV/u.

Published
1994
Full Text
View/download PDF

10. Fragmentation pattern in sequential emission spectra

Author

J.C. Adloff, C. Le Brun, J. Lemière, B. Rastegar, R. Brou, F. Delaunay, L. Stuttge, M. Louvel, J.F. Lecolley, J.L. Ferrero, F. Lefebvres, R. Legrain, B. Bilwes, F. Scheibling, F. Guilbault, G.M. Jin, M. Glaser, M. Mahi, A. Genoux-Lubain, Y. Cassagnou, Jean Péter, C. Lebrun, O. Lopez, Elio Rosato, B. Tamain, G. Rudolf, F. Cosmo, A. Péghaire, G. Bizard, J. Colin, R. Bilwes, R. Bougault, M. Aboufirassi, S. Tomasevic, J.L. Laville, D. Durand, J.C. Steckmeyer, 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), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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
Physics, Nuclear and High Energy Physics, Photon, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Spectral line, Thermalisation, medicine.anatomical_structure, Fragmentation (mass spectrometry), Coincident, medicine, Emission spectrum, Atomic physics, Nuclear Experiment, Nucleus
Abstract

Coincident light particles and fragments produced in Kr+Au reactions at 27, 44 and 60 MeV/u have been measured with a large solid-angle set-up. Energy spectra of Z=1, 2 and 3 particles sequentially emitted by the slowed-down projectile-like nucleus evolve between an evaporation and a fragmentation pattern, suggesting a saturation in the thermalisation process.

Published
1993
Full Text
View/download PDF

11. Evidence for fast and simultaneous multi-fragment emission in central Kr+Au collisions at 60 mev/u

Author

A. Badala, J.C. Steckmeyer, C. Le Brun, J. Colin, D. Durand, M. Aboufirassi, C. Paulot, O. Lopez, S. Tomasevic, M. Mahi, B. Tamain, M. Louvel, D. Horn, F. Scheibling, G. Rudolf, L. Stuttge, A. Péghaire, F. Lefebvres, F. Cosmo, R. Bougault, J.L. Laville, J.F. Lecolley, R. Brou, B. Bilwes, A. Genoux-Lubain, 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), 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
Physics, Nuclear physics, Nuclear and High Energy Physics, Fragmentation (mass spectrometry), Fragment (computer graphics), Atomic physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

Decay products emitted in Kr+Au collisions at 60 MeV/u have been detected with a large experimental array. Events with fragment multiplicities up to 5 have been recorded. After a careful selection of central collisions leading to equilibrited events, the data are compared to two fragmentation models in which fragments are emitted either sequentially or simultaneously. It is shown that the data can be explained very well by the second model, thus suggesting a prompt multifragmentation mechanism. Possible expansion effects in the disassembly process are also investigated.

Published
1993
Full Text
View/download PDF

14. Squeeze-out of nuclear matter in Au+Au collisions.

Author

Tsang MB, Danielewicz P, Hsi WC, Huang M, Lynch WG, Bowman DR, Gelbke CK, Lisa MA, Peaslee GF, Charity RJ, Sobotka LG, Begemann-Blaich ML, Cosmo F, Ferrero A, Hubele J, Imme G, Iori I I, Kempter J, Kreutz P, Kunde GJ, Kunze WD, Lindenstruth V V, Lynen U, Mang M, Moroni A, Müller WF, Neumann M, Ocker B, Ogilvie CA, Pochodzalla J, Raciti G, Rosenberger F, Rubehn T, Sann H, Scardaoni R, Schüttauf A, Schwarz C, Seidel W, Serfling V V, Trautmann W, Tucholski A, Wörner A, and Zwieglinski B

Published
1996
Full Text
View/download PDF

15. Collective expansion in central Au+Au collisions.

Author

Hsi WC, Kunde GJ, Pochodzalla J, Lynch WG, Tsang MB, Begemann-Blaich ML, Bowman DR, Charity RJ, Cosmo F, Ferrero A, Gelbke CK, Glasmacher T, Hofmann T, Imme G, Iori I I, Hubele J, Kempter J, Kreutz P, Kunze WD, Lindenstruth V V, Lisa MA, Lynen U, Mang M, Moroni A, Müller WF, Neumann M, Ocker B, Ogilvie CA, Peaslee GF, Raciti G, Rosenberger F, Sann H, Scardaoni R, Schüttauf A, Schwarz C, Seidel W, Serfling V V, Sobotka LG, Stuttge L, Tomasevic S, Trautmann W, Tucholski A, Williams C, Wörner A, and Zwieglinski B

Published
1994
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results