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2. (He3,t) Reaction at Intermediate Energies

Author

J. L. Boyard, J.C. Jourdain, M. Chamcham, T. Hennino, M. Gusakow, C. Gaarde, M. Boivin, Clive Ellegaard, Bo Jakobsson, Peter Ekström, M. Roy-Stephan, J. Lyttkens, M. Bedjidian, J.-Y. Grossiord, C. D. Goodman, I. Bergqvist, Lars Carlén, D. Bachelier, J.R. Pizzi, P. Radvanyi, A. Guichard, R. Haroutunian, and J.S. Larsen

Subjects
Nuclear reaction, Nuclear physics, Physics, Angular momentum, Isospin, General Physics and Astronomy, Atomic physics, Impulse (physics), Born approximation, Nuclear Experiment, Spectral line, Excitation, Charged particle
Abstract

Data are presented for the (/sup 3/He, t) reaction at energies of 600 MeV, 1.2 GeV, and 2 GeV on targets /sup nat/C, /sup 54/Fe, and /sup 89/Y. The low--excitation-energy regions of the spectra are dominated by isospin-spin excitations. Cross-section calculations in distorted-wave impulse approximation with parameters from NN data account reasonably well for the data. At 2-GeV bombarding energy a strong excitation of the ..delta.. resonance is observed for all targets.

Published
1983
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3. Possible observation of a γ-transition in the Λ8Li hypernucleus

Author

J.-R. Pizzi, Jacek Pniewski, M. Bedjinian, J.-Y. Grossiord, M. J. Kudla, M. Gusakow, M. Jacquin, H. Piekarz, J. Piekarz, A. Guichard, and E. Descroix

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Meson, 010308 nuclear & particles physics, Nuclear Theory, Hadron, Hypernucleus, 01 natural sciences, Nuclear physics, Pion, Excited state, Antimatter, 0103 physical sciences, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics, Ground state
Abstract

The γ-rays produced by absorption of stopped K − mesons in a 9 Be target were measured in coincidence with the accompanying charged pions and π 0 mesons. The γ-line at (1.22 ± 0.04) MeV observed in coincidence with the (40–80) MeV charged pions was tentatively ascribed to a γ-transition in the Λ 8 Li hypernucleus. A possible interpretation of this line as a decay of the 1 − excited state to the 1 − ground state in Λ 8 Li is discussed.

Published
1980
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4. ReactionLi6(p, Δ++)He6at 1.04 GeV and theΔ−NInteraction

Author

A. Garin, M. Bedjidian, D. Bachelier, J.-Y. Grossiord, J.C. Jourdain, T. Hennino, Oleksa-Myron Bilaniuk, P. Radvanyi, R. Haroutunian, M. Gusakow, M. Jacquin, A. Guichard, P. Foessel, M. Roy-Stephan, J.-R. Pizzi, S. Gardien, E. Descroix, and J. L. Boyard

Subjects
Nuclear reaction, Physics, Light nucleus, 010308 nuclear & particles physics, Hadron, General Physics and Astronomy, Elementary particle, Fermion, 01 natural sciences, Baryon, Crystallography, 0103 physical sciences, Nuclear Experiment, 010306 general physics, Isotopes of helium
Abstract

The reaction $^{6}\mathrm{Li}(p, {\ensuremath{\Delta}}^{++})^{6}\mathrm{He}$ has been studied at 1.04 GeV for transferred momenta ranging from 0.11 to 0.35 ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$. An exponential decrease of the cross section is observed. A Glauber-type calculation is presented. The possibility of extracting information on ${\ensuremath{\sigma}}_{\ensuremath{\Delta}N}$ and ${\ensuremath{\alpha}}_{\ensuremath{\Delta}N}$ is discussed.

Published
1982
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5. ÉTUDE DES RÉACTIONS (p, pd), (p, pt) ET (p, p 3He) SUR 12C ET 16O A 75 MeV

Author

M. Bedjidian, Jean-Yves Grossiord, J.-R. Pizzi, M. Gusakow, J. Lega, A. Guichard, G. Grégoire, T. Delbar, ALICE, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), 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
[PHYS.HIST]Physics [physics]/Physics archives, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], General Engineering
Abstract

Les réactions de diffusion quasi élastique (p, pd), (p, pt) et (p, p, 3He) ont été effectuées sur 12C et 16O à 75 MeV. Les bas niveaux d'excitation des noyaux résiduels ont été observés. La présence de niveaux T = 1 de 10B et 14N et de niveaux de parité positive de 13N et 13C ne s'explique que si l'on admet la possibilité de mécanismes de réaction plus complexes que le simple mécanisme de diffusion quasi élastique. Une comparaison relative des facteurs spectroscopiques avec des calculs théoriques a été faite pour les états les plus peuplés.

Published
1975
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6. Search for a nucleon-participant multiplicity effect on a possible anomalous fragment production

Author

E. Descroix, R. Haroutunian, T. Hennino, P. Radvanyi, D. Bachelier, Jean-Yves Grossiord, J. L. Boyard, M. Bedjidian, Didier Contardo, M. Roy-Stephan, M. Jacquin, J.-R. Pizzi, J. C. Jourdain, S. Gardien, A. Guichard, M. Gusakow, 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), ALICE, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), 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, Projectile, 01 natural sciences, Spectral line, Nuclear physics, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], 0103 physical sciences, Nuclear fusion, Atomic physics, Multiplicity (chemistry), Nuclear Experiment, 010306 general physics, Nucleon
Abstract

Momentum spectra of projectile fragments from 1.1 A GeV20Ne interactions with a Fe target have been measured with associated charged-particle multiplicity of participant nucleons. We also measured fragment absorption by introducing a Fe absorber. We searched for enhanced anomalous fragment production for fragments of charge 6≦Z≦ 10 as a function of multiplicity. To the possible exception of18Ne, a negative result is reported.

Published
1987
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7. Observation of a γ transition in the Λ4H hypernucleus

Author

J.-R. Pizzi, H. Piekarz, J. Piekarz, J.-Y. Grossiord, A. Filipkowski, M. Bedjidian, A. Guichard, S. Majewski, and M. Gusakow

Subjects
Physics, Nuclear and High Energy Physics, Meson, 010308 nuclear & particles physics, Nuclear Theory, Hypernucleus, 01 natural sciences, Spectral line, Coincidence, Nuclear physics, Pion, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Line (formation)
Abstract

The γ spectra induced by stopped K − mesons in a 7 Li target were obtained in coincidence with the accompanying charged pions. A thorough analysis of these spectra indicates that the observed 1.09 MeV line can be ascribed to a γ transition in the 4 Λ H hypernucleus.

Published
1976
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8. (p, pd), (p, pt) and (p, pHe3) reactions onC12andO16at 75 MeV

Author

Th. Delbar, Jean-Yves Grossiord, J. Lega, A. Guichard, M. Bedjidian, G. Grégoire, J.-R. Pizzi, and M. Gusakow

Subjects
Chemical kinetics, Physics, Nuclear reaction, Nuclear and High Energy Physics, Deuterium, Helium-3, Analytical chemistry, Isotopes of boron, Born approximation, Atomic physics, Isotopes of beryllium, Isotopes of helium
Abstract

(p,pd), (p,pt), and (p,p/sup 3/He) reactions have been studied at 75 MeV on /sup 12/C and /sup 16/O. A good energy resolution (approx. 400 keV) permitted the observation of several levels of the different residual nuclei. The results are analyzed with distorted-wave impulse approximation calculations, and spectroscopic factors are extracted and compared with theoretical predictions. A comparison of our results with experimental data from transfer reactions on the same nuclei is made. Spectroscopic and mechanism information are discussed; in particular, the excitation of T = 1 levels in /sup 10/B and /sup 14/N allowed the comparison with p--d* (S = 0,T = 1) scattering obtained from other reactions.

Published
1977
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9. Further investigation of the γ-transitions in Λ4H and Λ4 hypernuclei

Author

J. Piekarz, Jean-Yves Grossiord, M. Jacquin, Jacek Pniewski, M. J. Kudla, E. Descroix, J.-R. Pizzi, M. Bedjidian, A. Guichard, M. Gusakow, and H. Piekarz

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, High energy, Meson, 010308 nuclear & particles physics, Nuclear Theory, 01 natural sciences, Coincidence, Nuclear physics, Pion, Photon emission, 0103 physical sciences, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment, 010306 general physics, Excitation
Abstract

The γ-spectra induced by stopped K− mesons in 6Li and 7Li targets in coincidence with the accompanying charged pions and π0 mesons. The γ-line at (1.04 ± 0.04) MeV observed with charged pions was identified as a γ-transition in Λ4H, whereas the γ-line at (1.15 ± 0.04)_MeV observed with π0 mesons was ascribed to a γ-transition in Λ4He. Using these new values for the excitation energies of the 1+ levels of Λ4H and Λ4He hypernuclei, the phenomenological ΛN potential for the s-state interaction was recalculated.

Published
1979
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10. Search for Baryonium by High Resolution Measurement of p̄p Elastic Differential Cross Section and Analysing Power from 250 MeV/c to 700 MeV/c

Author

H. Catz, J. Y. Grossiord, S. Mango, G. Bruge, E. Descroix, B. Mayer, J. R. Pizzi, M. Mayer, R. Haroutunian, G.R. Smith, A. L. Mathie, M. Gusakow, F. Vogler, J. M. Durand, P. Birien, E. T. Boschitz, Avivi I. Yavin, J.A. Konter, R. Bertini, H. Bedjian, J. Arvieux, A. Chaumeaux, and A. Guichard

Subjects
Physics, Nuclear physics, Scattering cross-section, Work (thermodynamics), Deuterium, General theory, Scattering, Nuclear Theory, Structure (category theory), High resolution, Nuclear Experiment, Power (physics)
Abstract

The study of the nuc1eon-antinucleon (NN) interaction is needed for a better understanding of the nature of the forces governing the nucleon-nucleon (NN) system (a subject of ordinary Nuclear physics) and, hopefully, for a more general theory of baryon-baryon interaction. Why is additional information on the NN system necessary after decades of intense experimental and theoretical work ? The answer is that conclusions regarding NN forces are drawn from the data on NN scattering and on the deuteron structure. In both cases (the deuteron is a loosely bound system) relatively large interaction distances are probed (≥ 1 fm).

Published
1984
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11. Inelastic Scattering of 30 MeV Polarized Protons from 90,92Zr and 92Mo

Author

M. Bedjidiam, R. de Swiniarski, J.-R. Pizzi, M. Massaad, G. Bagieu, J.-Y. Grossiord, M. Gusakow, and Clyde B. Fulmer

Subjects
Physics, Nuclear physics, Quasielastic scattering, Collective model, Inelastic scattering
Abstract

Previously reported measurement of inelastic scattering of 20.3 MeV polarized protons from 90Zr, 92Zr and 92Mo 1) have shown poor agreement between the predictions of the nuclear collective model and the analyzing power for the first 2+ states in these nuclei, although the corresponding cross-sections for these states were well reproduced by the model. On the other hand, the analyzing power for the low-lying 3− states in these nuclei were fairly well reproduced. Although the agreement between the analyzing power and the coupled-channels collective model calculations were somewhat improved by the introduction of the “full Thomas term” of the distorted spin-orbit potential, the overall agreement remains poor for the 2+ analyzing power.

Published
1976
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13. Macroscopic and microscopic model analysis of inelastic scattering of 30 MeV polarized protons from $^{90,92}$Zr and $^{92}$Mo

Author

G. Bagieu, M. Gusakow, D. L. Pham, R. de Swiniarski, M. Massaad, M. Bedjidiam, J.-Y. Grossiord, J.-R. Pizzi, Clyde B. Fulmer, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), 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), ALICE, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, Quasielastic scattering, Proton, 010308 nuclear & particles physics, Inelastic scattering, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Deep inelastic scattering, 01 natural sciences, Inelastic neutron scattering, 0103 physical sciences, Collective model, Atomic physics, 010306 general physics
Abstract

Angular distributions for 30 MeV polarized proton inelastic scattering and analyzing powers were measured for low-lying 2+, 3−, and 5− states in 90,92Mo. These are compared with coupled channel collective model and microscopic model calculations.

Published
1976

14. (p,pd) reaction on 12C at 58 MeV

Author

J. R. Pizzi, M. Gusakow, M. Bedjidian, A. Guichard, G. Bagieu, E. Descroix, and M. Jacquin

Subjects
Chemical kinetics, Nuclear reaction, Light nucleus, Materials science, Deuterium, Analytical chemistry, Isotopes of boron, Ion
Abstract

The reaction 12C(p,pd)10B has been studied at 58 MeV. The first four levels of 10B have been observed. The results are discussed and compared with existing information.

Published
1978
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15. A detection system using drift chambers for the SPES4 spectrometer at Laboratoire National Saturne

Author

M. Gusakow, J.-R. Pizzi, S. Gardien, J. L. Boyard, T. Hennino, P. Radvanyi, D. Bachelier, M. Bedjidian, M. Jacquin, J. C. Jourdain, M. Roy-Stephan, A. Guichard, Didier Contardo, R. Haroutunian, Jean-Yves Grossiord, E. Descroix, 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), ALICE, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), 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, Energy loss, Spectrometer, 010308 nuclear & particles physics, Position resolution, Time resolution, 01 natural sciences, 7. Clean energy, Particle identification, hypertext, Nuclear physics, author, Time of flight, Cardinal point, Rigidity (electromagnetism), [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], 0103 physical sciences, lector, ComputingMethodologies_DOCUMENTANDTEXTPROCESSING, 010306 general physics, Instrumentation, ComputingMilieux_MISCELLANEOUS, text
Abstract

We describe the “drift chamber” detection setup of SPES4, the 4 GeV/c spectrometer at Laboratoire National Saturne. The particle identification is performed by combining magnetic rigidity selection with energy loss and time of flight measurements. This allows to separate analysed isotopes from Z = 1 to at least Z = 10 up to a rigidity of 4 GeV/c. A charge resolution of ΔZrms = 0.1 and a time resolution of Δtrms = 120 ps for 18Ne at about 3 GeV/c per Z are easily obtained. Two sets of multiwire drift chambers are used to measure and reconstruct the particle trajectories at the output of the system. A position resolution better than Δxrms = 160 μm can be achieved in the focal plane. This corresponds to a momentum resolution of Δδrms = 0.22 × 10−4. The performances of SPES4 (Δδrms = 2.2 × 10−4) can then be wholly exploited.

Published
1987

16. Observation des états excités des hypernoyaux de masse 4

Author

Bedjidian, M., CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard - Lyon I, M. Gusakow(J.P. Burq), and Flores, Sylvie

Subjects
états excités, hypernoyaux, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

voir fichier pdf

Published
1980

17. Les différents types d'émission de particules chargées associés aux collisions entre ions lourds légers

Author

Billerey, Roland, 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), Université Claude Bernard - Lyon I, M. Gusakow, and Flores, Sylvie

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ions lourds légers
Abstract

pas de résumé

Published
1981

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