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1. Radio-detection signature of high-energy cosmic rays by the CODALEMA experiment

Author

Alain Lecacheux, Didier Charrier, Ferid Haddad, Thierry Gousset, Pascal Lautridou, P. Eschstruth, Olivier Ravel, D. Ardouin, Richard Dallier, D. Monnier-Ragaigne, A. Rahmani, A. Belletoile, J. Lamblin, L. Denis, Laboratoire SUBATECH Nantes (SUBATECH), 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), Laboratoire de l'Accélérateur Linéaire (LAL), 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 CODALEMA

Subjects
Nuclear and High Energy Physics, Ultra-high-energy cosmic rays, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Cosmic ray, Astrophysics, 01 natural sciences, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Data acquisition, 0103 physical sciences, Coherence (signal processing), Ultra-high-energy cosmic ray, Radio detection, 010306 general physics, Instrumentation, Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Signature (logic), 95.55.Jz, 29.90.+r, 96.40-z, Microwave, Counting rate
Abstract

Taking advantage of recent technical progress which has overcome some of the difficulties encountered in the 1960's in the radio detection of extensive air showers induced by ultra high energy cosmic rays (UHECR), a new experimental apparatus (CODALEMA) has been built and operated. We will present the characteristics of this device and the analysis techniques that have been developed for observing electrical transients associated with cosmic rays. We find a collection of events for which both time and arrival direction coincidences between particle and radio signals are observed. The counting rate corresponds to shower energies $\geq 5\times 10^{16}$ eV. The performance level which has been reached considerably enlarges the perspectives for studying UHECR events using radio detection., merge of astro-ph/0504240 and astro-ph/0504297 into one paper

Published
2005

2. Recent Light Particle Correlation Data from Heavy Ion Collisions at Intermediate and Low Energies

Author

D. Ardouin

Subjects
Physics, Nuclear and High Energy Physics, Photon, Field (physics), General Physics and Astronomy, Charged particle, Nuclear physics, Particle, Impact parameter, Atomic physics, Nuclear Experiment, Nucleon, Charged particle beam, Excitation
Abstract

We present a review of recent two-particle interferometry data for heavy-ion collisions in the domain of energy between ten and a few hundreds of MeV/nucleon. Not only identical particles but unlike particle correlations have been used successfully as a probe for space-time dynamics of the collision process. Due to the availability of new dedicated charged particles or photon multidetectors, the field of particle interferometry is moving to a good level of quantitative description: excitation energy and impact parameter dependences are now provided which should stimulate additional theoretical calculations for two-particle cross-sections and emission of light fragments.

Published
1997

3. Search for an enhanced production of low energy pions in C(p, π+)X, Cu(p, π+)X, and Cu(p, π∘)X reactions for 300 MeV≦Tp≦400 MeV

Author

D. Ardouin, V. Bellini, J. Gosset, P. de Saintignon, G. Sanouillet, G. S. Papparlado, K. Kilian, H. Dabrowski, M. Boloré, A. Mougeot, B. Saghai, J. Julien, C. Cerutti, L. Bimbot, D. Lebrun, C. Lebrun, L. Sperduto, J. M. Hisleur, T. Johansson, B. Erazmus, and S. Leray

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Pion, Meson, Hadron, Analytical chemistry, Nuclear fusion, Elementary particle, Atomic physics, Spectral line, Boson
Abstract

The observation of an enhancement in the production of low energy pions in the Cu(p, π+)X reaction is confirmed. The width of the bump is about 5 MeV around 350 MeV. A similar enhancement appears at 330 MeV for C(p, π+)X but the width has not been measured. An attempt to observe this behaviour in Cu(p, π∘)X is described. From the data one cannot conclude about the existence of a structure around 350 MeV proton energy. The lack of resolution in theπ∘ spectrometer may have washed out the small effect expected fromπ + measurements.

Published
1994

4. Evidence for dynamical proton emission in peripheral Xe+Sn collisions at 50 MeV/u

Author

M. GERMAIN, P. EUDES, D. GOURIO, J. L. LAVILLE, D. ARDOUIN, M. ASSENARD, G. AUGER, C. O. BACRI, J. BENLLIURE, E. BISQUER, F. BOCAGE, B. BORDERIE, R. BOUGAULT, R. BROU, P. BUCHET, J. L. CHARVET, A. CHBIHI, J. COLIN, D. CUSSOL, R. DAYRAS, A. DEMEYER, D. DOR, D. DURAND, J. D. FRANKLAND, E. GALICHET, E. GENOUIN DUHAMEL, E. GERLIC, D. GUINET, F. GULMINELLI, N. LAUTESSE, P. LAUTRIDOU, C. LEBRUN, C.H. LEBRUN, J. F. LECOLLEY, A. LE FVRE, T. LEFORT, R. LEGRAIN, N. LE NEINDRE, O. LOPEZ, M. LOUVEL, J. LUKASIK, N. MARIE, A. M. MASKAY, V. MTIVIER, L. NALPAS, A. D. NGUYEN, M. PARLOG, J. PTER, E. PLAGNOL, A. RAHMANI, T. RPOSEUR, M. F. RIVET, R. ROY, F. SAINT LAURENT, S. SALOU, M. SQUALLI, J. C. STECKMEYER, M. STERN, B. TAMAIN, L. TASSAN GOT, O. TIREL, E. VIENT, C. VOLANT E. J. P. WIELEZCKO, ROSATO, ELIO, M., Germain, P., Eude, D., Gourio, J. L., Laville, D., Ardouin, M., Assenard, G., Auger, C. O., Bacri, J., Benlliure, E., Bisquer, F., Bocage, B., Borderie, R., Bougault, R., Brou, P., Buchet, J. L., Charvet, A., Chbihi, J., Colin, D., Cussol, R., Dayra, A., Demeyer, D., Dor, D., Durand, J. D., Frankland, E., Galichet, E., GENOUIN DUHAMEL, E., Gerlic, D., Guinet, F., Gulminelli, N., Lautesse, P., Lautridou, C., Lebrun, Lebrun, C. H., J. F., Lecolley, A., LE FVRE, T., Lefort, R., Legrain, N., LE NEINDRE, O., Lopez, M., Louvel, J., Lukasik, N., Marie, A. M., Maskay, V., Mtivier, L., Nalpa, A. D., Nguyen, M., Parlog, J., Pter, E., Plagnol, A., Rahmani, T., Rposeur, M. F., Rivet, Rosato, Elio, R., Roy, F., SAINT LAURENT, S., Salou, M., Squalli, J. C., Steckmeyer, M., Stern, B., Tamain, L., TASSAN GOT, O., Tirel, E., Vient, and C. VOLANT E. J. P., Wielezcko

Published
2000

5. First detection of extensive air showers by the TREND self-triggering radio experiment

Author

C. Cârloganu, M. Zhao, T. Saugrin, Y. H. Zhang, Valentin Niess, Xiang-Ping Wu, L. Kai, D. Ardouin, Q. B. Gou, O. Ravel, Didier Charrier, Olivier Martineau-Huynh, Y. Zheng, Zhang Jingzhe, Hong-Bo Hu, P. Lautridou, 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 - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), 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), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Electromagnetic environment, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Cosmic ray, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Antenna array, Radio telescope, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Extensive air showers, Ultra-high-energy cosmic ray, Neutrinos, 010306 general physics, Cosmic rays, Remote sensing, Physics, 010308 nuclear & particles physics, [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astronomy and Astrophysics, Radio-detection, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Neutrino detector, Self-triggering radio array, Antennas, Radio wave
Abstract

37 pages, 15 figures Astroparticle Physics (in press). Trend; International audience; An antenna array devoted to the autonomous radio-detection of high energy cosmic rays is being deployed on the site of the 21 cm array radio telescope in XinJiang, China. Thanks in particular to the very good electromagnetic environment of this remote experimental site, self-triggering on extensive air showers induced by cosmic rays has been achieved with a small scale prototype of the foreseen antenna array. We give here a detailed description of the detector and present the first detection of extensive air showers with this prototype.

Published
2011

6. Investigation of pion absorption in heavy-ion induced subthresholdπ0production

Author

A.L. Boonstra, Miriam Marqués, L. Sezac, T. Matulewicz, R. W. Novotny, B. Fornal, L. Freindl, W. F. Henning, M. Pfeiffer, J. S. Díaz, F. Lefevre, R.S. Simon, R.S. Mayer, V. Metag, E. Casal, W. Mittig, Yves Roland Schutz, R.W. Ostendorf, Barbara Ewa Erazmus, R. Holzmann, H. Dabrowski, D. Ardouin, W. Kühn, G. Martínez, H. Delagrange, F. D. Berg, J.L. Ferrero, Herbert Löhner, Z. Sujkowski, Facundo Ballester, H. W. Wilschut, C. Lebrun, R. Merrouch, H. Nifenecker, and L.B. Venema

Subjects
Physics, Nuclear reaction, Meson, 010308 nuclear & particles physics, Subthreshold conduction, Scattering, Nuclear Theory, Attenuation length, General Physics and Astronomy, Nuclear matter, 01 natural sciences, 7. Clean energy, Nuclear physics, Pion, 0103 physical sciences, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon
Abstract

We present results from an experimental study of reabsorption effects in subthreshold pi0 production in the reaction Xe-129 + Au-197 at 44 MeV/nucleon. Within the picture of pion generation in nucleon-nucleon scattering we deduce, from our data and from a comparison with the systematics of production cross sections available for lighter reaction systems, information on the pi0 absorption length in nuclear matter. For the pi0 kinetic-energy range congruent-to 5-100 MeV the energy-averaged lambda(abs) and its momentum dependence are obtained, and compared with optical-model calculations.

Published
1993

7. First results of the TIANSHAN radio experiment for neutrino detection

Author

Valentin Niess, Junqiang Zhang, P. Lautridou, Minghua Zhao, Yi Zhang, Y. H. Zheng, Olivier Martineau-Huynh, D. Ardouin, Didier Charrier, O. Ravel, C. Cârloganu, Xiang-Ping Wu, Quanbu Gou, H. M. Hu, L. Kai, T. Saugrin, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire SUBATECH Nantes (SUBATECH), 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), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), and 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)

Subjects
Physics, Nuclear and High Energy Physics, [PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Astronomy, Cosmic ray, Astrophysics, 01 natural sciences, 7. Clean energy, Radio telescope, Neutrino detector, 0103 physical sciences, Neutrino, 010303 astronomy & astrophysics, Instrumentation, Radio detection, Analysis method
Abstract

We present the first results of a set-up called TIANSHAN radio experiment for neutrino detection (TREND) being presently deployed on the site of the 21 cm array (21CMA) radio telescope, in XinJiang, China. We describe here its detection performances as well as the analysis method we applied to the data recorded with a small scale prototype. We demonstrate the ability of the TREND set-up for an autonomous radio-detection of extended air showers induced by cosmic rays. The full set-up will consist of 80 antennas deployed over a 4 km(2) area, and could result in a very attractive and unequalled radio-detection facility for the characterization of showers induced by ultra-high energy neutrinos with energies around 10(17) eV. (C) 2010 Elsevier B.V. All rights reserved.

Published
2010

8. Geomagnetic origin of the radio emission from cosmic ray induced air showers observed by CODALEMA

Author

C. Fabrice, L. Denis, Benoît Revenu, X. Garrido, D. Breton, C. Dumez-Viou, A. Sourice, Pascal Lautridou, F. Meyer, K. Payet, F. Haddad, D.H. Koang, Nicole Meyer-Vernet, M. Chendeb, Didier Charrier, J. Chauvin, D. Monnier-Ragaigne, Thierry Gousset, François Lefeuvre, E. Meyer, S. Valcares, Lilian Martin, S. Dagoret-Campagne, O. Ravel, T. Saugrin, G. Plantier, A. Stutz, N. Gautherot, D. Lebrun, Corinne Berat, A. Cordier, Alain Lecacheux, F. Montanet, C. Riviere, T. Garcon, Richard Dallier, J. Lamblin, A. Bellétoile, P. Stassi, D. Ardouin, 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 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), Laboratoire de l'Accélérateur Linéaire (LAL), 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), ESEO-GSII (GSII), ESEO-Tech, Université Bretagne Loire (UBL)-Université Bretagne Loire (UBL), Unité Scientifique de la Station de Nançay (USN), Centre National de la Recherche Scientifique (CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), Laboratoire d'astrophysique de l'observatoire de Besançon (UMR 6091) (LAOB), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), CODALEMA, 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), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-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 Bretagne Loire (UBL)-École supérieure d'électronique de l'ouest [Angers] (ESEO)-Université Bretagne Loire (UBL)-École supérieure d'électronique de l'ouest [Angers] (ESEO), Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)

Subjects
96.40.-z, Physics::Instrumentation and Detectors, 95.85.Ry, media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Cosmic ray, Astrophysics, 01 natural sciences, Asymmetry, Particle detector, Ultra-High-Energy Cosmic Rays, Extensive Air showers, Observatory, 0103 physical sciences, Radio detection, 010306 general physics, media_common, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, 010308 nuclear & particles physics, [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Air shower, Earth's magnetic field, 95.55.Jz, High Energy Physics::Experiment, Astrophysics - High Energy Astrophysical Phenomena, Radio wave
Abstract

The new setup of the CODALEMA experiment installed at the Radio Observatory in Nancay, France, is described. It includes broadband active dipole antennas and an extended and upgraded particle detector array. The latter gives access to the air shower energy, allowing us to compute the efficiency of the radio array as a function of energy. We also observe a large asymmetry in counting rates between showers coming from the North and the South in spite of the symmetry of the detector. The observed asymmetry can be interpreted as a signature of the geomagnetic origin of the air shower radio emission. A simple linear dependence of the electric field with respect to vxB is used which reproduces the angular dependencies of the number of radio events and their electric polarity., Comment: 9 pages, 15 figures, 1 table

Published
2010

9. Radio pulses from cosmic ray air showers - Boosted Coulomb and Cherenkov fields

Author

Nicole Meyer-Vernet, D. Ardouin, Alain Lecacheux, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire SUBATECH Nantes (SUBATECH), 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), and 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)

Subjects
Field (physics), Astrophysics::High Energy Astrophysical Phenomena, elementary particles, FOS: Physical sciences, Synchrotron radiation, Cosmic ray, Astrophysics, 01 natural sciences, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], cosmic rays, 0103 physical sciences, Coulomb, waves, 010306 general physics, Physics, 010308 nuclear & particles physics, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, radiation mechanisms: non-thermal, Computational physics, Amplitude, Atmosphere of Earth, Space and Planetary Science, Radio frequency, Radio wave
Abstract

High-energy cosmic rays passing through the Earth's atmosphere produce extensive showers whose charges emit radio frequency pulses. Despite the low density of the Earth's atmosphere, this emission should be affected by the air refractive index because the bulk of the shower particles move roughly at the speed of radio waves, so that the retarded altitude of emission, the relativistic boost and the emission pattern are modified. We consider in this paper the contribution of the boosted Coulomb and the Cherenkov fields and calculate analytically the spectrum using a very simplified model in order to highlight the main properties. We find that typically the lower half of the shower charge energy distribution produces a boosted Coulomb field, of amplitude comparable to the levels measured and to those calculated previously for synchrotron emission. Higher energy particles produce instead a Cherenkov-like field, whose amplitude may be smaller because both the negative charge excess and the separation between charges of opposite signs are small at these energies., 10 figures - Accepted by Astronomy & Astrophysics

Published
2008

10. An active dipole for cosmic ray radiodetection with CODALEMA

Author

Pascal Lautridou, S. Valcares, Alain Lecacheux, Richard Dallier, O. Ravel, Thierry Gousset, Didier Charrier, Ferid Haddad, D. Ardouin, A. Belletoile, L. Denis, T. Saugrin, J. Lamblin, 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), Unité Scientifique de la Station de Nançay (USN), Centre National de la Recherche Scientifique (CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université d'Orléans (UO), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Franco Cervelli, Francesco Forti, Riccardo Paoletti and Angelo Scribano, CODALEMA, 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), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, [PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], 010308 nuclear & particles physics, Broad bandwidth, business.industry, [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Cosmic ray, Astrophysics, 01 natural sciences, Dipole, Optics, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Spiral (railway), Electric pulse, 010306 general physics, business, Instrumentation, Radio detection, Electromagnetic pulse
Abstract

A paraître dans NIM A; International audience; The CODALEMA experiment detects the electromagnetic pulses radiated during the development of Extensive Air Showers (EAS). Since 2005, in addition to spiral log-periodic antennas, ultra broad bandwidth active dipoles have been designed to detect the full electric pulse shape of these signals. A few performances of these new detectors are presented.

Published
2006

11. Radioelectric Field Features of Extensive Air Showers Observed with CODALEMA

Author

O. Ravel, Ferid Haddad, Didier Charrier, S. Valcares, Thierry Gousset, Pascal Lautridou, T. Saugrin, J. Lamblin, D. Ardouin, Alain Lecacheux, A. Belletoile, D. Monnier-Ragaigne, L. Denis, Richard Dallier, P. Eschstruth, 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), Unité Scientifique de la Station de Nançay (USN), Centre National de la Recherche Scientifique (CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), Laboratoire de l'Accélérateur Linéaire (LAL), 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 d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), CODALEMA, 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), Observatoire des Sciences de l'Univers en région Centre (OSUC), Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-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
Field (physics), Ultra-high-energy cosmic rays, FOS: Physical sciences, Magnitude (mathematics), Cosmic ray, Astrophysics, 01 natural sciences, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Electric field, 0103 physical sciences, Ultra-high-energy cosmic ray, Radio detection, 010306 general physics, Physics, 9640-z, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, Ultra High Energy Cosmic Rays PACS: 9555Jz, Astrophysics (astro-ph), Astronomy and Astrophysics, 9585Ry, Computational physics, Core (optical fiber), 13. Climate action, Event (particle physics), Energy (signal processing)
Abstract

Based on a new approach to the detection of radio transients associated with extensive air showers induced by ultra high energy cosmic rays, the experimental apparatus CODALEMA is in operation, measuring about 1 event per day corresponding to an energy threshold ~ 5. 10^16 eV. Its performance makes possible for the first time the study of radio-signal features on an event-by-event basis. The sampling of the magnitude of the electric field along a 600 meters axis is analyzed. It shows that the electric field lateral spread is around 250 m (FWHM). The possibility to determine with radio both arrival directions and shower core positions is discussed., Accepted for publication in Astroparticle Physics

Published
2006

12. CODALEMA: a cosmic ray air shower radio detection experiment

Author

Pascal Lautridou, J. Lamblin, P. Eschstruth, A. Belletoile, D. Monnier-Ragaigne, Olivier Ravel, Didier Charrier, L. Denis, D. Ardouin, Alain Lecacheux, Thierry Gousset, Ferid Haddad, Richard Dallier, Laboratoire SUBATECH Nantes (SUBATECH), 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), Laboratoire de l'Accélérateur Linéaire (LAL), 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 CODALEMA

Subjects
Physics, Nuclear and High Energy Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astronomy and Astrophysics, Cosmic ray, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Atomic and Molecular Physics, and Optics, 030218 nuclear medicine & medical imaging, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], 03 medical and health sciences, 0302 clinical medicine, Air shower, Electric field, 0103 physical sciences, Ultra-high-energy cosmic ray, Antenna (radio), 010306 general physics, Event (particle physics), Radio detection, Energy (signal processing)
Abstract

The CODALEMA experimental device currently detects and characterizes the radio contribution of cosmic ray air showers : arrival directions and electric field topologies of radio transient signals associated to cosmic rays are extracted from the antenna signals. The measured rate, about 1 event per day, corresponds to an energy threshold around 5.1016eV. These results allow to determine the perspectives offered by the present experimental design for radiodetection of Ultra High Energy Cosmic Rays at a larger scale.

Published
2005

13. Radiodetection of Cosmic Ray Extensive Air Showers: upgrade of the CODALEMA experiment

Author

Didier Charrier, P. Eschstruth, F. Haddad, D. Monnier-Ragaiggne, Richard Dallier, Thierry Gousset, Pascal Lautridou, Alain Lecacheux, O. Ravel, D. Ardouin, L. Denis, J. Lamblin, A. Rahmani, A. Belletoile, 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 d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), 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), Unité Scientifique de la Station de Nançay (USN), Centre National de la Recherche Scientifique (CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université d'Orléans (UO), CODALEMA, 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), 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), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Cosmic ray, Astrophysics, ultra high energy cosmic rays, 01 natural sciences, Atomic and Molecular Physics, and Optics, Coincidence, Antenna array, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Sky, 0103 physical sciences, Transient (oscillation), Antenna (radio), 010303 astronomy & astrophysics, Energy (signal processing), radiodetection, media_common
Abstract

International audience; We present the characteristics and performance of a demonstration experiment devoted to the observation of ultra high- energy cosmic ray extensive air showers using a radiodetection technique. In a first step, one antenna narrowed band filtered acting as trigger, with a 4 sigma threshold above sky background-level, was used to tag any radio transient in coincidence on the antenna array. Recently, the addition of 4 particle detectors has allowed us to observe cosmic ray events in coincidence with antennas.

Published
2004

14. Unlike particle correlations and the strange quark matter distillation process

Author

Carsten Greiner, H. Stöcker, Sven Soff, R. Lednicky, Stefan Schramm, C. Spieles, D. Gourio, Steffen A. Bass, D. Ardouin, J.-P. Coffin, V.L. Lyuboshits, C. Kuhn, Laboratoire SUBATECH Nantes (SUBATECH), 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), 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
Physics, Nuclear and High Energy Physics, Particle physics, Strange quark, Nuclear Theory, pacs:12.39.-x, FOS: Physical sciences, pacs:25.75.-q, law.invention, pacs:12.39.Ba, Nuclear Theory (nucl-th), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), pacs:12.38.Mh, law, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Particle, ddc:530, Nuclear Experiment (nucl-ex), Distillation, Nuclear Experiment
Abstract

We present a new technique for observing the strange quark matter distillation process based on unlike particle correlations. A simulation is presented based on the scenario of a two-phase thermodynamical evolution model., Comment: 15 pages, 2 figures, 1 table

Published
2002

15. Emission time scale of light particles in the system Xe+Sn at 50 AMeV. A probe for dynamical emission ?

Author

D. Gourio, D. Ardouin, M. Assenard, G. Auger, Ch.O. Bacri, N. Bellaize, A. Benkirane, J. Benlliure, B. Berthier, E. Bisquer, B. Borderie, R. Bougault, P. Box, R. Brou, J.L. Charvet, A. Chbihi, J. Colin, D. Cussol, R. Dayras, E. De Filippo, A. Demeyer, C. Donnet, D. Durand, P. Ecomard, P. Eudes, M. Germain, D. Guinet, L. Lakehal-Ayat, P. Lautesse, J.L. Laville, L. Lebreton, C. Le Brun, J.F. Lecolley, T. Lefort, A. Lefèvre, R. Legrain, N. Le Neindre, O. Lopez, M. Louvel, N. Marie, V. Métivier, L. Nalpas, A. Ouatizerga, M. Parlog, J. Péter, E. Plagnol, E. Pollaco, A. Rahmani, R. Régimbart, T. Reposeur, M.F. Rivet, E. Rosato, F. Saint-Laurent, S. Salou, M. Squalli, J.C. Steckmeyer, G. Tabacaru, B. Tamain, L. Tassan-Got, E. Vient, C. Volant, J.P. Wieleczko, A. Wieloch, K. Yuasa-Nakagawa, 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), 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), 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, 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), 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), 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, Nuclear and High Energy Physics, Photon, Scale (ratio), Proton, 010308 nuclear & particles physics, Nuclear Theory, FOS: Physical sciences, Time sequence, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Deuterium, 0103 physical sciences, Impact parameter, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Quantum, Event (particle physics)
Abstract

Proton and deuteron correlation functions have been investigated with both impact parameter and emission source selections. The correlations of the system (129Xe + natSn) at 50 AMeV have been measured with the 4 pi INDRA which provides a complete kinematical description of each event. The emission time scale analyzed with a quantum model reveals the time sequence of the light particles emitted by the projectile-like fragment. The short and constant emission time of the proton, independent of the impact parameter, can be attributed to a preequilibrium process., Comment: 20 pages, with 11 included figures; Accepted by European Physics Journal A

Published
2000
Full Text
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16. Determination of Emission Times Using two Particle Correlation

Author

D. Ardouin

Subjects
Physics, Strange quark, law, Detector, Particle, Granularity, Distillation, law.invention, Interpretation (model theory), Characterization (materials science), Computational physics
Abstract

We emphasize the importance of disentangling time and spatial effects for the quantitative interpretation of particle correlations. Several methods dealing with directional selections and complementary measurements of sizes using high granularity 4π detectors are presented. Thus average emission times determinations are providing unique information on the dynamics of nucleus. Unlike particle correlations are also shown to give access to the time ordering of emission between different particles. Examples of applications to relativistic and ultra relativistic problems, like the characterization of strange quark matter distillation process are presented.

Published
1999

17. Search for production of strangelets in quark matter using particle correlations

Author

D. Ardouin, Stefan Schramm, V.L. Lyuboshitz, Horst Stoecker, Carsten Greiner, D. Gourio, R. Lednicky, C. Spieles, J.-P. Coffin, Steffen A. Bass, C. Kuhn, Sven Soff, Laboratoire SUBATECH Nantes (SUBATECH), 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), 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
Physics, Nuclear and High Energy Physics, Particle physics, Nuclear Theory, Strangelet, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Theory (nucl-th), library users, Strange matter, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Particle, ddc:530, OPAC, uses
Abstract

We present a new technique for observing the strangelet production in quark matter based on unlike particle correlations. A simulation is presented with a two-phase thermodynamical model., Comment: 19 pages, 8 eps figures included

Published
1997

18. Interferometry measurements selected by neutron calorimetry

Author

R.H. Siemssen, D. Guerreau, M. Morjean, A. Rahmani, H. Dabrowski, J. Québert, L. Sezac, J. Pluta, D. Ardouin, C. Ghisalberti, P. Eudes, J. Galin, A. Chbihi, R. Lednicky, P. Lautridou, A. Péghaire, F. Guilbault, T. Reposeur, Barbara Ewa Erazmus, C. Lebrun, Chambon, Pascale, 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), 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), 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 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), and KVI - Center for Advanced Radiation Technology

Subjects
Physics, Nuclear and High Energy Physics, INTENSITY, 010308 nuclear & particles physics, Scattering, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Theory, Calorimetry, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Calorimeter, Nuclear physics, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Interferometry, [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], 0103 physical sciences, Neutron, SMALL RELATIVE MOMENTA, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, ComputingMilieux_MISCELLANEOUS
Abstract

Two-proton correlation functions have been measured in the reaction 208 Pb+ 93 Nb at 29 MeV per nucleon at GANIL in the scattering chamber of ORION used as a neutron calorimeter. In the same experiment preequilibrium and equilibrium emissions are observed. Very strong effects are seen after centrality selection and directional cuts.

Published
1995

19. Temperature and excitation energy determination in $^{208}$Pb+$^{197}$Au reactions at 29 MeV/u

Author

D. Guerreau, A. Rahmani, Y. Périer, A. Chbihi, M. Morjean, F. Guilbault, D. Jacquet, R.H. Siemssen, R. Lednicky, D. Ardouin, Pascal Lautridou, J. Québert, J. Pluta, C. Ghisalberti, B. Erazmus, T. Reposeur, A. Péghaire, L. Sezac, H. Dabrowski, C. Lebrun, J. Galin, P. Eudes, 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), 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), 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 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
Physics, Nuclear reaction, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Fission, Nuclear Theory, Energy balance, 01 natural sciences, Spectral line, Dissociation (chemistry), Nuclear physics, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], 0103 physical sciences, Dissipative system, Neutron, Atomic physics, Nuclear Experiment, 010306 general physics, Excitation
Abstract

The violence of collisions induced by 208Pb projectiles bombarding a 197Au target at 29 MeV/u has been deduced by detecting the accompanying neutrons. With this filter, the temperature of the projectile-like fragments formed in very dissipative collisions has been extracted from the slope of the alpha-particle energy spectra. Temperatures of the order of 7 MeV are found, in very good agreement with the energy dissipations deduced from an energy balance assuming binary kinematics. The associated neutron multiplicities are well reproduced by a standard evaporation model, despite the dissociation into intermediate mass fragments observed in previous experiments. However, the measured temperatures exceed by a significant amount the limits predicted by theoretical calculations.

Published
1995

20. Two-proton correlation function measured at very small relative momenta

Author

A. Rahmani, P. Eudes, L. Martin, J. Pluta, L. Sezac, D. Ardouin, P. Roussel-Chomaz, P. Aguer, R. Lednicky, W. Burzynski, D. Nouais, W. Peryt, P. Stefański, D. Roy, W. Mittig, H. Dabrowski, B. Erazmus, N. Carjan, M. Lewitowicz, C. Lebrun, F. Guilbault, Pascal Lautridou, T. Reposeur, 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), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), 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), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), 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 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), 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), and Lorgeril, Jocelyne

Subjects
Physics, Nuclear and High Energy Physics, Proton, Spectrometer, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], 010308 nuclear & particles physics, Particle source, Function (mathematics), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Correlation function, [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], 0103 physical sciences, Experimental correlation, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, ComputingMilieux_MISCELLANEOUS
Abstract

Two-proton coincidences at very small relative momenta were measured in the reaction 129 Xe+ 48 Ti at 45 MeV/nucleon using the SPEG spectrometer at GANIL. From the experimental correlation function, a precise value of the lifetime τ 0 = (3.90±0.15) 10 −21 s is extracted. Applying three angular cuts on the correlation function, a signature of directional effects is observed and a value of the particle source velocity v s = (0.27±0.03)c is deduced in case of a sequential equilibrium emission.

Published
1994

21. Possible observation of medium effects using a pion correlation technique

Author

D. L'Hote, N. Bastid, J. Augerat, C. Cavata, P. Charmensat, R. Lednicky, M-C. Lemaire, J. Gosset, P. Gorodetzky, H. Dabrowski, D. Qassoud, H.N. Agakishiev, B. Lucas, Gerard Montarou, A. Le Merdy, Wolfgang Bauer, J. PIuta, A. Rahmani, P. Dupieux, Pawel Danielewicz, P. Stefański, Peter Schuck, V.G. Grishin, M.-J. Parizet, Dietrich Klakow, O. Valette, J. Marroncle, J.P. Alard, D. Ardouin, J. Poitou, Laboratoire SUBATECH Nantes (SUBATECH), 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), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), DIOGENE, 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), and 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)

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Nuclear Theory, 01 natural sciences, 7. Clean energy, Resonance (particle physics), Nuclear physics, Pion, medicine.anatomical_structure, Yield (chemistry), 0103 physical sciences, Coulomb, medicine, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Atomic physics, Impact parameter, Nuclear Experiment, 010306 general physics, Absorption (electromagnetic radiation), Nucleus
Abstract

Correlations of oppositely charged pions produced in interactions of protons and light nuclei with different nuclear targets are investigated. The invariant-mass distributions are analyzed in order to search for new conjectured nuclear effects. Strong and electromagnetic final-state interactions between pions and the Coulomb interaction between pions and the target nucleus are taken into account. An admixture of pion pairs coming from resonance decays is estimated. An enhancement in the low invariant-mass region is observed only for heavy target systems. A shadowing effect due to pion absorption inside the nuclear medium is considered as a possible source of this pattern. Azimuthal π + π − correlations and pion yield dependence on the impact parameter, as well as transport calculations, seem to confirm this assumption.

Published
1993

22. Classical model for two-proton correlations in intermediate-energy heavy-ion reactions

Author

B. Erazmus, D. Ardouin, N. Carjan, 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), and Chambon, Pascale

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Proton, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], 010308 nuclear & particles physics, Nuclear Theory, Correlation function (quantum field theory), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, 0103 physical sciences, Coulomb, Nuclear force, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Radioactive decay, Energy (signal processing)
Abstract

The Coulomb interaction between two protons sequentially evaporated from the same compound nucleus is studied as a possible origin for their measured correlations. This is done in the frame of three-body trajectory calculations with both Coulomb and nuclear forces. The temperature and mass of the emitting nucleus were determined from the measured energy spectra of single protons. The correlation function was found to be very sensitive to the mean time delay between the emissions of the two particles. A value ${\mathrm{\ensuremath{\tau}}}_{0}$=(1.0\ifmmode\pm\else\textpm\fi{}0.2)\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}21}$ s was obtained by comparison of our calculations with the two-proton correlation function measured at backward angles in the reaction $^{40}\mathrm{Ar}$${+}^{108}$Ag at 44 MeV/nucleon.

Published
1991

23. Search for lifetime effects of an evaporation source using two-proton correlations

Author

A. Péghaire, D. Ardouin, S. Pratt, J. Québert, D. Goujdami, C. Lebrun, F. Guilbault, P. Lautridou, R. Boisgard, H. Dabrowski, Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), 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), Grand Accélérateur National d'Ions Lourds (GANIL), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Proton, Astrophysics::High Energy Astrophysical Phenomena, Nuclear fusion, Sensitivity (control systems), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Physics::Atmospheric and Oceanic Physics
Abstract

The directional dependence of the measured correlationfunction of two particles emitted from an evaporative source is shown to offer a weak sensitivity to the source lifetime. From the agreement with evaporative calculations, one cannot rule out a sequential emission.

Published
1991

24. CORINNE 90

Author

D Ardouin

Subjects
Physics, Nuclear physics, Interferometry, Particle
Published
1990

25. Preequilibrium particles and mean-field effects from particle-particle correlations in heavy-ion collisions

Author

F. Saint-Laurent, Z. Basrak, H. Delagrange, D. Ardouin, G. Bizard, Jean Péter, H. Doubre, C. K. Gelbke, A. Kyanowski, M.R. Maier, J. Pochodzalla, W. G. Lynch, Peter Schuck, F. Lefebvres, B. Remaud, Bernard Tamain, F. Sébille, A. Péghaire, J. Québert, Y. P. Viyogi, W. Mittig, G. Grégoire, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-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), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), 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), 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), 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), 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), 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), and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Nuclear Theory, 01 natural sciences, Lower energy, Nuclear physics, Mean field theory, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Particle, Heavy ion, Atomic physics, 010306 general physics
Abstract

Preequilibrium two-particle correlation functions at large relative momenta are shown to contain persisting mean-field effects at intermediate energies. These findings stem from simultaneous experimental and theoretical studies (using the Landau-Vlasov equation) of the systems 40 Ar + Au and Ar + Ti at E A = 60 MeV In the theoretical study are also included experimental data at lower energy ( E A = 25 MeV ) from other groups.

Published
1990

26. Temperature measurements at backward angles in $^{40}$Ar induced reactions on Ag at E/A=44MeV

Author

A. Péghaire, P. Lautridou, R. Boisgard, D. Ardouin, Ph. Eudes, H. Dabrowski, F. Guilbault, B. Remaud, F. Sébille, J. Québert, D. Goujdami, C. Lebrun, Laboratoire SUBATECH Nantes (SUBATECH), 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), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), 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), 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), 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), 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, education.field_of_study, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Population, Relaxation (NMR), Astrophysics::Cosmology and Extragalactic Astrophysics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Temperature measurement, Excited state, 0103 physical sciences, Atomic physics, 010306 general physics, education, Astrophysics::Galaxy Astrophysics, Excitation
Abstract

From backward-angle correlation measurements, an emission temperature of the target-like fragment is extracted by means of the relative population of excited states of emitted light clusters. Values of the temperature of T =2.2 −0.2 +0.3 MeV and T =2.9±0.7 MeV are obtained respectively for the 4 He and 6 Li cases. Our finding is consistent with the emission of a thermalized system after excitation energy relaxation.

Published
1990

27. Corinne 90

Author

D. Ardouin

Subjects
Nuclear and High Energy Physics
Published
1991

28. Inclusive two-particle correlations forinduced16reactions onAu197atE/A=94MeV

Author

F. Lefebvres, F. Saint-Laurent, Jean Péter, A. Péghaire, G. Bizard, Bernard Tamain, M. B. Tsang, A. Kyanowski, C. K. Gelbke, Y. P. Viyogi, Y. D. Kim, M.R. Maier, J. Pochodzalla, W. G. Gong, Z. Chen, H. Doubre, W. G. Lynch, Elio Rosato, Jirohta Kasagi, D. Ardouin, H. Delagrange, and J. Québert

Subjects
Physics, Nuclear physics, Nuclear reaction, Nuclear and High Energy Physics, Helium-4, Hadron, Alpha particle, Atomic physics, Nuclear Experiment, Isotopes of beryllium, Nucleon, Isotopes of helium, Charged particle
Abstract

Two-particle correlations at small relative momenta were measured for /sup 16/O-induced reactions on /sup 197/Au at E/A = 94 MeV, providing information about the space-time localization and excitation energy density of the emitting system. Two-particle correlation functions suggest that emission occurs from a region which is slightly larger than observed for /sup 14/N-induced reactions at E/A = 35 MeV, but significantly smaller than for /sup 40/Ar-induced reactions at E/A = 60 MeV. In contrast, the relative populations of widely separated particle unbound states are found to be surprisingly independent of incident energy and projectile mass.

Published
1987

29. Two-particle correlations at small relative momenta forinduced40reactions onAu197atE/A=60 MeV

Author

A. Kyanowski, David H. Boal, W. Mittig, F. Lefebvres, H. Delagrange, F. Saint-Laurent, Bernard Tamain, W. A. Friedman, W. G. Lynch, J. Québert, H. Doubre, G. Bizard, C. Grégoire, D. Ardouin, A. Péghaire, Y. P. Viyogi, B. Zwieglinski, Jean Péter, C. K. Gelbke, M.R. Maier, and J. Pochodzalla

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Hartree–Fock method, Nuclear system, 01 natural sciences, Excited state, 0103 physical sciences, Energy density, Low density, Atomic physics, Nuclear Experiment, 010306 general physics, Quantum, Excitation
Abstract

Two-particle correlations at small relative momenta provide information about the space-time extent and the excitation energy density of the emitting system. Detailed measurements of two-particle correlations were performed for $^{40}\mathrm{induced}$ reactions on $^{197}\mathrm{Au}$ at E/A=60 MeV. In general, more pronounced correlations are measured for particles of higher outgoing energy. From the relative populations of excited states, a mean emission temperature of T\ensuremath{\approxeq}5.5 MeV is extracted. Within the framework of the quantum statistical model, our findings are consistent with an expanding nuclear system which disintegrates at low temperature (T\ensuremath{\approxeq}5.5 MeV) and rather low density (\ensuremath{\rho}\ensuremath{\le}0.1${\ensuremath{\rho}}_{0}$).

Published
1987

31. Light particle correlations in Ar + Au reaction at 60 MeV/A

Author

A. Péghaire, Bernard Tamain, D. Ardouin, Y. P. Viyogi, W. G. Lynch, C. Grégoire, G. Bizard, J. Quevert, F. Saint-Laurent, H. Doubre, A. Kyanowski, W. Mittig, Jean Péter, H. Delagrange, F. Lefebvres, B. Zwieglinski, C. K. Gelbke, M.R. Maier, and J. Pochodzalla

Subjects
Physics, Nuclear physics, Nuclear reaction, Nuclear and High Energy Physics, Light nucleus, Angular correlation, Light particle
Published
1986

32. Investigation of the nuclear continuum byCa40inelastic scattering onCa40at 160 MeV

Author

N. Frascaria, J.P. Garron, J.C. Jacmart, J.C. Roynette, M. Lattuada, D. Ardouin, and Y. Blumenfeld

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Angular range, Angular distribution, Scattering, Giant resonance, Incident energy, Atomic physics, Inelastic scattering, Nuclear Experiment, Excitation
Abstract

The $^{40}\mathrm{Ca}$ + $^{40}\mathrm{Ca}$ reaction has been studied at 160 MeV incident energy. Low lying peaks are observed in the inelastic channel together with a broad bump at 26 MeV total excitation energy. A comparison is made with results obtained in the same reaction at higher bombarding energy.NUCLEAR REACTIONS $^{40}\mathrm{Ca}+^{40}\mathrm{Ca}\ensuremath{-}{E}_{\mathrm{inc}}=160$ MeV; measured $\ensuremath{\sigma}(\ensuremath{\theta},E)$; angular range 6\ifmmode^\circ\else\textdegree\fi{} to 40\ifmmode^\circ\else\textdegree\fi{}; compared to higher energy results.

Published
1982

34. Levels ofGe68excited by the (p, t) reaction

Author

R. Tamisier, P. Avignon, F. Guilbault, M. Vergnes, G. Berrier, G. Rotbard, D. Ardouin, and R. Seltz

Subjects
Physics, Nuclear physics, Nuclear reaction, Nuclear and High Energy Physics, Angular momentum, Isotopes of germanium, Isotope, Excited state, Atomic physics, Born approximation, Charged particle, Excitation
Abstract

The /sup 70/Ge(p,t)/sup 68/Ge reaction has been studied at 26 MeV incident energy with an overall resolution of 10 keV using a split-pole spectrometer. Forty-one /sup 68/Ge levels, among which twenty-eight are observed for the first time, are populated below 5.2 MeV excitation energy. Angular distributions are obtained, and comparison with distorted-wave Born approximation calculations allows spin and parity assignments. An interesting result is the discovery of the first excited 0/sup +/ level at 1.753 MeV as well as seven other 0/sup +/ levels above 2 MeV energy. Five J/sup ..pi../ = 2/sup +/ and four J/sup ..pi../ = 4/sup +/ levels are observed for the first time. We also establish the position of the first J/sup ..pi../ = 3/sup -/ level at 2.651 MeV and the possibility of a J/sup ..pi../ = 6/sup +/ level at 4.456 MeV excitation energy.

Published
1977

35. Analyzing power measurements for two-nucleon transfer reactions in a shape transitional nucleus

Author

E. R. Flynn, W. P. Alford, D. Ardouin, Ronald E. Brown, J. A. Cizewski, J. W. Sunier, E. Sugarbaker, Laboratoire SUBATECH Nantes (SUBATECH), and 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)

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Nuclear Theory, Order (ring theory), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Spectral line, Excited state, 0103 physical sciences, Sensitivity (control systems), Born approximation, Atomic physics, Nuclear Experiment, 010306 general physics, Ground state, Nucleon
Abstract

Measurements of the analyzing power in the two-nucleon transfer reaction ($\stackrel{\ensuremath{\rightarrow}}{t}, p$) have been carried out leading to $^{98}\mathrm{Mo}$ and to the transitional nucleus $^{102}\mathrm{Mo}$ where shape coexistence states are expected. Because of the sensitivity of the shapes of analyzing powers to the reaction mechanism, such data may be useful in determining the basic parentage of excited states in these nuclei through the interference of second order processes. A comparison of the ground state and strong excited ${0}^{+}$ state transitions shows no large differences in the shapes of analyzing powers nor are any observed in $L=2$ transitions.NUCLEAR REACTIONS $^{96,100}\mathrm{Mo}(\stackrel{\ensuremath{\rightarrow}}{t}, p)$ $E=17$ MeV; polarized beam; enriched targets: measured $\ensuremath{\sigma}({E}_{p}, \ensuremath{\theta})$, ${A}_{y}(\ensuremath{\theta})$; DWBA; transitional nucleus description.

Published
1980

36. Three-particle effects observed in two-particle correlation measurements

Author

Jean Péter, F. Lefebvres, W.A. Friedman, F. Saint-Laurent, W. G. Lynch, H. Delagrance, C. Grégoire, M. Maier, A. Péghaire, W. Mittig, D. Ardouin, C. K. Gelbke, Y. P. Viyogi, A. Kyanowski, G. Bizard, J. Pochodzalla, H. Doubre, Bernard Tamain, B. Zwieglinski, J. Québert, 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), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), 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), 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), 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
Particle system, Physics, Nuclear and High Energy Physics, Field (physics), Alpha particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], media sphere, Correlation function (statistical mechanics), public sphere, Coincident, Coulomb, Particle, Theory, Atomic physics, Nuclear Experiment, Ground state, communicative space
Abstract

Correlations between coincident alpha particles and protons were measured for 40Ar induced reactions on 197Au at E/A = 60 MeV. The correlation function exhibits features not expected from free α-p interactions. These include a pronounced maximum at low relative momenta, q ≈ 15 MeV / c , and a dependence of the 5Li ground state peak on the total 5Li energy and decay kinematics. These anomalies are explained by considering the contribution of the decay of 9B, and the effects of the Coulomb field, due to the reaction residue, on the decay of 5Li.

Published
1985

37. Étude de la réaction 29Si(d, n)30P et de la structure du 30P

Author

D. Ardouin, J. Uzureau, A. Adam, B. Duchemin, and P. Avignon

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Spectrometer, Deuterium, Nuclear Theory, SHELL model, Nuclear structure, Neutron, Parity (physics), Atomic physics, Nuclear Experiment, Excitation
Abstract

The nuclear structure of 30 P has been studied using the 29 Si(d, n) 30 P reaction at deuteron energies of 6 and 8 MeV. Neutrons were detected with a time-of-flight spectrometer. Absolute differential cross sections of transitions to 26 states in 30 P up to 7 MeV excitation energy have been analysed with DWBA and Hauser-Feshbach theories to yield l p values. New spin and parity assignments and values of spectroscopic factors were obtained. For the positiveparity states, experimental data are compared to results obtained from recent shell model calculations. More complete shell model calculations have been extended to some odd-parity levels which are often strongly populated in the 29 Si(d, n) 30 P reaction. When comparison with experimental values is possible, the agreement is reasonable.

Published
1974

38. Nuclear temperatures and the population of particle-unstable states ofLi6ininduced40reactions onAu197atE/A=60MeV

Author

A. Kyanowski, Jean Péter, C. Grégoire, Bernard Tamain, A. Péghaire, W. Mittig, F. Saint-Laurent, Y. P. Viyogi, F. Lefebvres, W.A. Friedman, B. Zwieglinski, H. Delagrange, H. Doubre, W. G. Lynch, J. Québert, D. Ardouin, C. K. Gelbke, M.R. Maier, J. Pochodzalla, and G. Bizard

Subjects
Physics, Nuclear reaction, education.field_of_study, Isotopes of lithium, Nuclear Theory, Population, General Physics and Astronomy, Alpha particle, Charged particle, Spectral line, Deuterium, Excited state, Atomic physics, Nuclear Experiment, education
Abstract

Correlations between coincident alpha particles and deuterons emitted in /sup 40/Ar-induced reactions on /sup 197/Au at E/A = 60 MeV were measured. The relative populations of particle-unstable states of /sup 6/Li were extracted. The measured spectra are consistent with a mean nuclear temperature at emission of T = 5 MeV. Limitations of temperature measurements via the population of excited states are discussed.

Published
1985

39. Nuclear structure investigations of the Ge isotopes by means of (p, t) reactions and microscopic studies of nuclear deformations and collective spectra

Author

P. Avignon, G. Rotbard, R. Seltz, B. Remaud, D. Ardouin, M. Vergnes, F. Guilbault, and Krishna Kumar

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Isotopes of germanium, 010308 nuclear & particles physics, Nuclear structure, Hartree–Fock method, 01 natural sciences, Spectral line, Charged particle, Pairing, 0103 physical sciences, Atomic physics, 010306 general physics, Excitation
Abstract

Systematics are presented from our study of the Ge nuclei by means of the (p,t) reaction. From observed intensities and excitation energies, conclusions are drawn concerning structure and reaction mechanisms. They are discussed in the frame of microscopic calculations. These calculations predict a shape transition from a nearly spherical nucleus (/sup 70/Ge) to a slightly oblate one (/sup 74/Ge). The energies of the low-lying 0/sup +/ levels are well fitted; dynamical effects induced by pairing fluctuations are shown to play a major role in this feature as well as in the striking evolution of their intensities in the (p,t) reaction. A connection is presented with the possibility of 0/sup +/ pairing isomer states. The outstanding splitting of the L = 3 strength at N = 42 appears as a characteristic feature of this region suggesting coupling effects in octupole modes.

Published
1978

40. Levels ofGe70,72,74excited by the (p,t) reaction

Author

G. Rotbard, J. Uzureau, R. Seltz, P. Avignon, Y. Deschamps, G. Berrier, M. Vergnes, R. Tamisier, F. Guilbault, and D. Ardouin

Subjects
Physics, Nuclear and High Energy Physics, Excited state, Atomic physics
Published
1977

41. Population of particle unbound states for the reaction 16O+Au at E/A=94 MeV

Author

F. Lefebvres, Bernard Tamain, W. G. Lynch, C. K. Gelbke, Y. D. Kim, M.R. Maier, J. Pochodzalla, W. G. Gong, Jean Péter, Elio Rosato, A. Péghaire, A. Kyanowski, Y. P. Viyogi, Z. Chen, Jirohta Kasagi, D. Ardouin, G. Bizard, H. Doubre, F. Saint-Laurent, M. B. Tsang, J. Québert, H. Delagrange, 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), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), 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), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), 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), 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 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, education.field_of_study, Light nucleus, 010308 nuclear & particles physics, Nuclear Theory, Population, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, Physics::Accelerator Physics, Particle, Atomic physics, Nuclear Experiment, 010306 general physics, education
Abstract

Populations of particle unbound states of light nuclei were measured for the reaction 16 O+Au at E / A = 94 MeV and compared to previous results for the reactions 14 N+Au at E/A = 35 MeV and 40 Ar+Au at E/A = 60 MeV . Emission temperatures extracted from the relative populations of states are surprisingly similar for all three reactions.

Published
1987

42. Ge72,74,76by the (t,p) reaction

Author

M. Vergnes, E. R. Flynn, D. L. Hanson, F. Guilbault, C. Lebrun, R. Rotbard, D. Ardouin, and S. D. Orbesen

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Angular momentum, Isotopes of germanium, Nuclear Theory, chemistry.chemical_element, Germanium, Spectral line, chemistry, Excited state, Atomic physics, Nuclear Experiment, Ground state, Excitation
Abstract

A systematic study of all of the stable even germanium isotopes by the ($t$,$p$) reaction has been performed. The reaction protons were analyzed in a quadrupole-dipole-dipole-dipole spectrometer with a resulting energy resolution approximately 15 keV. Levels up to 3 MeV in excitation energy were measured and the angular distributions compared to distorted wave analysis. A number of new spin assignments are made in the heavier germanium nuclei. Examination of the systematic trend of the ground state as well as various excited levels strongly supports a transition in nuclear deformation between $N=40$ and $N=42$. The data also indicate the effects of the approaching shell closure at $N=50$.NUCLEAR REACTIONS $^{70,72,74}\mathrm{Ge}$($t$,$p$), ${E}_{t}=17$ MeV $\ensuremath{\sigma}(\ensuremath{\theta})$, DW analysis.

Published
1979

43. (p,t) reactions onAs75andGe74and the weak coupling core-excitation model

Author

G. Rotbard, R. Seltz, P. Avignon, D. Ardouin, M. Vergnes, R. Tamisier, and F. Guilbaut

Subjects
Core (optical fiber), Physics, Nuclear reaction, Nuclear and High Energy Physics, Proton, Isotopes of germanium, Atomic physics, Ground state, Coupling (probability), Charged particle, Excitation
Abstract

J/sup pi/=3/2/sup -/ levels to which L=0 (p,t) transitions are observed have been identified in /sup 73/As at 0 (100%), 396 (2.4%), 656 (3%), and 1595 (1.5%) keV. The shapes of the angular distributions for the ground state and 656 keV level are identical to those corresponding to the two 0/sup +/ levels of /sup 72/Ge at 0 (100%) and 690 (27%) keV. Some of these results indicate that the large difference in relative intensities of the pure L=0 transitions to the levels at 690 keV in /sup 72/Ge (27%) and 656 keV in /sup 73/As (3%) and the fact that two other L=0 transitions are observed in /sup 73/As, significantly differ from those expected for strict weak coupling core excitation. It is shown that weak coupling is indeed a poor approximation for the two 0/sup +/ levels of /sup 72/Ge, due to the ''blocking'' of the proton p/sub 3///sub 2/ orbital. (AIP)

Published
1976

44. Structure ofGe78from theGe76(t, p)Ge78reaction

Author

D. Ardouin, D. L. Hanson, G. Rotbard, M. Vergnes, B. Remaud, Krishna Kumar, S. Orbesen, C. Lebrun, F. Guilbault, and E. R. Flynn

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Isotopes of germanium, Excited state, Nuclear Theory, Hadron, Nuclear structure, Born approximation, Atomic physics, Nuclear Experiment, Nucleon, Open shell
Abstract

The /sup 76/Ge(t,p)/sup 78/Ge reaction has been performed at a bombarding energy of 17 MeV. Thirteen excited states below 3 MeV excitation are reported with J/sup ..pi../ values obtained by comparison to distorted-wave Born-approximation analysis. A comparison to a dynamical deformation theory is made and the results suggest /sup 78/Ge is a transitional nucleus nearing spherical shape due to the proximity of the N = 50 closed shell.

Published
1978

45. Fission following capture reactions ofS32+Pb208

Author

C. K. Gelbke, D. Ardouin, W. G. Lynch, S. Saini, B. B. Back, P. A. Baisden, Z. R. Xu, R. R. Betts, M. B. Tsang, and M. A. McMahan

Subjects
Nuclear physics, Physics, Nuclear reaction, Nuclear and High Energy Physics, Angular momentum, Semi-empirical mass formula, Mass distribution, Fission, Projectile, Nuclear fusion, Atomic physics, Moment of inertia, Nuclear Experiment
Abstract

Fission fragment mass and angular distributions were measured for /sup 32/S induced reactions on /sup 208/Pb at the laboratory energies of 180, 210, 250, and 266 MeV. By measuring the folding angle distributions between coincident fissionlike fragments at several beam energies it is shown that essentially the entire mass of the projectile is transferred to the composite system, which subsequently decays via symmetric fission. With increasing projectile energy the width of the mass distribution increases approximately as the square root of the nuclear temperature. The energy dependence of the angle integrated fusion-fission cross sections can be well described by classical trajectory calculations using the proximity potential and one-body dissipation. The fission fragment angular distributions become more anisotropic with increasing beam energy. Even at the lowest energy of 180 MeV, the angular distributions are more anisotropic than expected from statistical model calculations using saddle point shapes of the rotating liquid drop model. A simple parametrization of the angular momentum dependence of the effective moment of inertia gives a consistent description of the energy dependence of the angular distributions.

Published
1983

46. Ga71andGa73levels as observed in the (t,p) reaction

Author

G. Rotbard, C. Lebrun, D. L. Hanson, F. Guilbaut, D. Ardouin, M. Vergnes, S. D. Orbesen, and E. R. Flynn

Subjects
Elastic scattering, Physics, Nuclear reaction, Nuclear and High Energy Physics, Angular momentum, Isotope, Spins, Stable isotope ratio, Scattering, Atomic physics, Nuclear Experiment, Excitation
Abstract

A study of the ($t$,$p$) reaction on the two stable Ga isotopes has been performed. The reaction protons were analyzed in a quadrupole-dipole-dipole-dipole spectrometer with a resulting energy resolution approximately 18 keV. Levels up to about 3 MeV excitation energy in $^{71}\mathrm{Ga}$ and 2.75 MeV in $^{73}\mathrm{Ga}$ were measured with 11 new levels observed in the first case and 18 in the second. The angular distributions have been compared to pure distributions observed in the $^{72,74}\mathrm{Ge}$($t$,$p$) reactions at the same energy and found to correspond mostly to pure angular momentum ($L$) transfer although mixing of $L$'s is allowed. A number of new spins assignments are made for Ga levels and the results are used to discuss the spin of $^{73}\mathrm{Zn}_{\mathrm{g}.\mathrm{s}.}$. The striking splitting of the $L=0$ strength in three approximately equal components, observed in $^{73}\mathrm{Ga}$, strongly supports a transition in nuclear deformation between $N=40 \mathrm{and} 42$.

Published
1979

47. Alpha-particle transfer to0+states in the germanium nuclei and the role of proton pairing correlations

Author

D. L. Hanson, D. Ardouin, and Nelson Stein

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Proton, Isotopes of germanium, 010308 nuclear & particles physics, Hadron, Alpha particle, 01 natural sciences, 7. Clean energy, Charged particle, Excited state, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon
Abstract

Alpha transfer to the ground and first excited ${0}^{+}$ states of the Ge isotopes has been studied by means of the $^{64,66,68,70}\mathrm{Zn}(^{6}\mathrm{Li}, d)^{68,70,72,74}\mathrm{Ge}$ reactions at 34-MeV incident energy. The sharp variation in strength between $^{72}\mathrm{Ge}$ and $^{74}\mathrm{Ge}$ is shown to result from a change in the proton structure of these two isotopes as the neutron number changes from $N=40 \mathrm{to} 42$.

Published
1980

48. Multiplicity dependent light particle corralations in 40Ar + 197Au reaction at

Author

C. K. Gelbke, M.R. Maier, J. Pochodzalla, D. Ardouin, C. Grégoire, A. Kyanowski, G. Bizard, H. Doubre, H. Delagrange, A. Péghaire, W. G. Lynch, Y. P. Viyogi, F. Saint-Laurent, B. Zwieglinski, Jean Péter, J. Québert, Bernard Tamain, F. Lefebvres, and W. Mittig

Subjects
Physics, Nuclear and High Energy Physics, Photon, Spacetime, Light particle, Interaction model, Multiplicity (chemistry), Impact parameter, Atomic physics, Nuclear Experiment, Charged particle, Coincidence
Abstract

Correlations between light particles in 40 Ar induced reactions on 197 Au at E A = 60 MeV have been measured in coincidence with a multidetector system. The correlations decrease monotonously with increasing charged particle multiplicity. With the help of a participant-spectator model, this multiplicity is tentatively connected to the impact parameter. The correlation function is analyzed in the framework of the final state interaction model in order to extract the spacetime extent of the emitting source.

Published
1986

49. Niveaux du 19F peuplés au cours de la réaction 18 O(d, n)19F a 4 MeV

Author

Y. Deschamps, D. Ardouin, B. Ramstein, P. Avignon, L.H. Rosier, and R. Tamisier

Abstract

Nous avons etudie la reaction 18O(d, n)19F a une energie incidente Ed = 4 MeV. Les facteurs spectroscopiques ont ete deduits des calculs en DWBA pour les niveaux du 19F peuples selectivement au cours de ce transfert. Les parites et les spins du niveau fondamental (1/2+), des niveaux excites a 0,197 MeV (5/2+), 6,27 MeV (1/2+) et 6,79 MeV (3/2-) ont ete confirmes ; nous proposons les attributions Jπ =1/2-, 3/2 pour le niveau a 7,52 MeV; Jπ = 1/2+ pour les niveaux excites a 7,67 MeV et 8,13 MeV.

Published
1972

50. Population of particle unbound states for the reaction 16O+197Au at E/A=94 MeV

Author

Z. CHEN, C. K. GELBKE, W. G. GONG, W. G. LYNCH, M. M. MAIER, J. POCHODZALLA, M. B. TSANG, F. SAINT LAURENT, D. ARDOUIN, H. DELAGRANGE, H. DOUBRE, J. KASAGI, A. KYANOWSKI, A. PEGHAIRE, J. PETER, G. BIZARD, F. LEFEBVRES, B. TAMAIN, J. QUEBERT E. Y. P. VIYOGI, ROSATO, ELIO, Z., Chen, C. K., Gelbke, W. G., Gong, W. G., Lynch, M. M., Maier, J., Pochodzalla, M. B., Tsang, F., SAINT LAURENT, D., Ardouin, H., Delagrange, H., Doubre, J., Kasagi, A., Kyanowski, A., Peghaire, J., Peter, Rosato, Elio, G., Bizard, F., Lefebvre, B., Tamain, and J. QUEBERT E. Y. P., Viyogi

Published
1987

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