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82 results on '"Van Lauwe, A"'

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

Author

Frankland, J. D., Chbihi, A., Mignon, A., Begemann-Blaich, M. L., Bittiger, R., Borderie, B., Bougault, R., Charvet, J. -L., Cussol, D., Dayras, R., Durand, D., Escano-Rodriguez, C., Galichet, E., Guinet, D., Lautesse, P., Fevre, A. Le, Legrain, R., Neindre, N. Le, Lopez, O., Lukasik, J., Lynen, U., Manduci, L., Marie, J., Muller, W. F. J., Orth, H., Parlog, M., Pichon, M., Rivet, M. F., Rosato, E., Roy, R., Saija, A., Schwarz, C., Sfienti, C., Tamain, B., Trautmann, W., Trzcinski, A., Turzo, K., Van Lauwe, A., Vigilante, M., Volant, C., Wieleczko, J. P., Zwieglinski, B., Vient, E., and Nalpas, L.

Subjects
Nuclear Experiment
Abstract

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

Published
2004
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2. Dynamical effects in multifragmentation at intermediate energies

Author

Colin, J., Cussol, D., Normand, J., Bellaize, N., Borderie, B., Bougault, R., Bouriquet, B., Buta, A. M., Charvet, J. L., Chbihi, A., Dayras, R., Durand, D., Frankland, J. D., Galichet, E., Guinet, D., Guiot, B., Hudan, S., Lautesse, P., Lavaud, F., Neindre, N. Le, Lopez, O., Manduci, L., Marie, J., Nalpas, L., Parlog, M., Pawlowski, P., Plagnol, E., Rivet, M. F., Rosato, E., Roy, R., Steckmeyer, J. C., Tamain, B., Van Lauwe, A., Vient, E., Vigilante, M., Volant, C., and Wieleczko, J. P.

Subjects
Nuclear Experiment
Abstract

The fragmentation of the quasi-projectile is studied with the INDRA multidetector for different colliding systems and incident energies in the Fermi energy range. Different experimental observations show that a large part of the fragmentation is not compatible with the statistical fragmentation of a fully equilibrated nucleus. The study of internal correlations is a powerful tool, especially to evidence entrance channel effects. These effects have to be included in the theoretical descriptions of nuclear multifragmentation., Comment: 13 pages, 26 figures, submitted to Physical Review C

Published
2003
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3. New approach of fragment charge correlations in 129Xe+(nat)Sn central collisions

Author

Charvet, J. L., Dayras, R., Durand, D., Lopez, O., Cussol, D., Dore, D., Nalpas, L., Van Lauwe, A., and Volant, C.

Subjects
Nuclear Experiment
Abstract

A previous analysis of the charge (Z) correlations in the $\Delta Z-$ plane for Xe+Sn central collisions at 32 MeV/u has shown an enhancement in the production of equally sized fragments (low $\Delta Z$) which was interpreted as an evidence for spinodal decomposition. However the signal is weak and rises the question of the estimation of the uncorrelated yield. After a critical analysis of its robustness, we propose in this paper a new technique to build the uncorrelated yield in the charge correlation function. The application of this method to Xe+Sn central collision data at 32, 39, 45 and 50 MeV/u does not show any particular enhancement of the correlation function in any $\Delta Z$ bin., Comment: 23 pages, 9 figures, revised version with an added figure and minor changes. To appear in Nuclear Physics A

Published
2002
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4. Multifragmentation in central collisions at intermediate energies: a fast process?

Author

Van Lauwe, A. and al, D. Durand et

Subjects
Nuclear Experiment
Abstract

The kinematical characteristics of fragments and light particles observed in central highly fragmented nuclear collisions at intermediate energies are compared with the results of a model assuming that the initial momentum distribution of the nucleons inside the two partners of the reaction has no time to relax before the disassembly of the system. The rather good agreement between the results of the model and the experimental data suggests that multifragmentation is a fast process with a strong memory of the entrance channel., Comment: Proceedings of the LX International Winter Meeting on Nuclear Physics, Bormio, Italy (2002)

Published
2002

5. High intensity targets stations for S3

Author

Stodel, Ch., Libin, J. -F., Marry, C., Lutton, F., Saint-Laurent, M. -G., Bastin, B., Piot, J., Clement, E., Le Moal, S., Morel, V., Thomas, J. -C., Kamalou, O., Frémont, G., Spitaëls, C., Savajols, H., Hue, R., Gangnant, P., Authier, M., Drouart, A., Van Lauwe, A., Lamour, E., Kallunkathariyil, J., Bacri, C. -O., Petitbon-Thévenet, V., Lefort, H., and Pellemoine, F.

Published
2015
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6. Chronic posttraumatic bursitis of the medial collateral ligament: surgical treatment in 2 high-level professional athletes

Author

Corten, Kristoff, Vandenneucker, Hilde, Van Lauwe, Johan, and Bellemans, Johan

Subjects
Bursitis -- Care and treatment, Bursitis -- Demographic aspects, Bursitis -- Case studies, Ligaments -- Injuries, Ligaments -- Case studies, Sports injuries -- Care and treatment, Sports injuries -- Demographic aspects, Sports injuries -- Case studies, Health, Sports and fitness
Published
2009

9. Investigation of the rehydration behaviour of food powders by comparing the behaviour of twelve powders with different properties

Author

Maxime Coursol, Song Miao, Katie L. Fitzpatrick, Junfu Ji, John J. Fitzpatrick, Arthur van Lauwe, and Aibhin O'Brien

Subjects
0404 agricultural biotechnology, Chromatography, Materials science, Chemical engineering, General Chemical Engineering, 04 agricultural and veterinary sciences, Particle size, Penetration (firestop), Wetting, 040401 food science
Abstract

The wettability and solubilisation ability of 12 food powders were measured and compared. Particle size and powder densities were measured and composition data was obtained to investigate the influence of these on powder rehydration. Wettability and solubilisation ability were measured over time along with an assessment of the rate-limiting regime in an agitated system. The study showed that composition in particular had a major influence on wettability. The solubilisation behaviour of the powders could be classified into 3 broad categories, those that solubilised easily, those that had a significant amount of insolubles but whose soluble portion solubilised easily, and those that solubilised slowly. The slow solubilisation was most likely due to inherently strong attractions between the molecules that constituted the powder. The work highlighted that powder clumping and floating occurred with the poor wetting powders and a slimy skin formed at the powder/water interface which impeded water penetration into the bulk powder. However, the pouring of powders into the vortex in a stirred system could greatly improve wettability by improving sinkability and mechanical disruption of clumps.

Published
2016
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10. Multifragmentation process for different mass asymmetry in the entrance channel around the Fermi energy

Author

Bellaize, N., Lopez, O., Wieleczko, J.P., Cussol, D., Auger, G., Bacri, Ch.O., Bocage, F., Borderie, B., Bougault, R., Bouriquet, B., Brou, R., Buchet, P., Buta, A.M., Charvet, J.L., Chbihi, A., Colin, J., Dayras, R., De Cesare, N., Demeyer, A., Doré, D., Durand, D., Frankland, J.D., Galichet, E., Genouin-Duhamel, E., Gerlic, E., Guiot, B., Guinet, D., Hudan, S., Lanzalone, G., Lautesse, P., Lavaud, F., Laville, J.L., Lecolley, J.F., Legrain, R., Le Neindre, N., Manduci, L., Marie, J., Nalpas, L., Normand, J., Pârlog, M., Pawłowski, P., Plagnol, E., Rivet, M.F., Rosato, E., Roy, R., Saint-Laurent, F., Steckmeyer, J.C., Tăbăcaru, G., Tamain, B., van Lauwe, E., Tassan-Got, L., Vient, E., Vigilante, M., and Volant, C.

Published
2002
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11. Model-independent tracking of criticality signals in nuclear multifragmentation data

Author

C. Sfienti, R. Bougault, P. Lautesse, A. Saija, H. Orth, J. Marie, C. Schwarz, J.D. Frankland, E. Vient, D. Guinet, M. Pichon, M.F. Rivet, J.L. Charvet, C. Volant, R. Dayras, A. Trzcinski, M. Pârlog, A. Chbihi, M.L. Begemann-Blaich, A. Le Fèvre, D. Durand, Alexis Mignon, R. Legrain, W. Trautmann, Elio Rosato, L. Nalpas, Mariano Vigilante, B. Borderie, J. Lukasik, W. F. J. Müller, E. Galichet, J.P. Wieleczko, R. Roy, K. Turzo, B. Tamain, N. Le Neindre, L. Manduci, A. Van Lauwe, C. Escano-Rodriguez, U. Lynen, R. Bittiger, D. Cussol, O. Lopez, B. Zwieglinski, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), ALADIN, INDRA, J. D., Frankland, A., Chbihi, A., Mignon, M. L., Begemann Blaich, R., Bittinger, B., Borderie, R., Bougault, J. L., Charvet, D., Cussol, R., Dayra, D., Durand, C., Escano Rodriguez, E., Galichet, D., Guinet, P., Lautesse, A., Le Fèvre, R., Legrain, N., Le Neindre, O., Lopez, J., Lukasik, U., Lynen, L., Manduci, J., Marie, W. F. J., Müller, L., Nalpa, H., Orth, M., Pârlog, M., Pichon, M. F., Rivet, R., Roy, Rosato, Elio, A., Saija, C., Schwarz, C., Sfienti, B., Tamain, W., Trautmann, A., Trczinski, K., Turzó, A., van Lauwe, E., Vient, Vigilante, Mariano, C., Volant, J. P., Wieleczko, B., Zwieglinski, Gesellschaft für Schwerionenforschung mbH (MBH), Gesellschaft für Schwerionenforschung mbH, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Conservatoire National des Arts et Métiers [CNAM] (CNAM), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institute of Nuclear Physics (IFJ-PAN), Institute of Nuclear Physics, National Institute for Physics and Nuclear Engineering (NIPNE), National Institute for Physics and Nuclear Engineering, Dipartimento di Scienze Fisiche e Sezione (INFN), Istituto Nazionale di Fisica Nucleare (INFN)-Università degli studi di Napoli Federico II, Laboratoire de Physique Nucléaire (IPN), Université Laval [Québec] (ULaval), Soltan Institute for Nuclear Studies (SINS), Soltan Institute, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Istituto Nazionale di Fisica Nucleare (INFN)-University of Naples Federico II = Università degli studi di Napoli Federico II

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

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

Published
2005
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12. A New Surgical Technique for Medial Collateral Ligament Balancing

Author

Hilde Vandenneucker, Johan Van Lauwe, Johan Bellemans, and Jan Victor

Subjects
Medial collateral ligament, business.industry, medicine.medical_treatment, Biomechanics, Anatomy, Knee Joint, musculoskeletal system, medicine.disease, Arthroplasty, Puncturing, medicine.anatomical_structure, medicine, Ligament, Orthopedics and Sports Medicine, Range of motion, business, Valgus deformity
Abstract

In this article, we present our experience with a new technique for medial soft tissue balancing, where we make multiple punctures in the medial collateral ligament (MCL) using a 19-gauge needle, to progressively stretch the MCL until a correct ligament balance is achieved. Ligament status was evaluated both before and after the procedure using computer navigation and mediolateral stress testing. The procedure was considered successful when 2 to 4-mm mediolateral joint line opening was obtained in extension and 2 to 6 mm in flexion. In 34 of 35 cases, a progressive correction of medial tightness was achieved according to the above described criteria. One case was considered overreleased in extension. Needle puncturing is a new, effective, and safe technique for progressive correction of MCL tightness in the varus knee.

Published
2010
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13. High intensity targets stations for S3

Author

F. Lutton, V. Morel, Frederique Pellemoine, J. Kallunkathariyil, J. F. Libin, G. Frémont, Eric Clément, C. Marry, H. Savajols, S. Le Moal, J. Piot, A. Van Lauwe, P. Gangnant, R. Hue, Ch. Stodel, A. Drouart, B. Bastin, H. Lefort, M. G. Saint-Laurent, O. Kamalou, M. Authier, E. Lamour, C.O. Bacri, V. Petitbon-Thévenet, J. C. Thomas, C. Spitaels, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut des Nanosciences de Paris (INSP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), 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), SPIRAL2, S3, GANILEXP, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Health, Toxicology and Mutagenesis, High intensity, Nuclear engineering, Public Health, Environmental and Occupational Health, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Pollution, Linear particle accelerator, Analytical Chemistry, Nuclear Energy and Engineering, Environmental science, Radiology, Nuclear Medicine and imaging, Spectroscopy, Beam (structure), Nuclear chemistry, Electron gun
Abstract

International audience; In the framework of the SPIRAL2 project atGANIL, the Super-Separator-Spectrometer (S3) is dedicatedto experiments using the very high intensity stablebeams ([10 plA) delivered by the superconducting linearaccelerator up to 14.5 A.MeV. Specific target stations arerequired to sustain these unprecedented beam intensities. Aprototype target station for actinides was designed andmanufactured, which main characteristics are described inthis paper. In order to commission this system and checkthe behavior of target materials, preliminary tests with 7.7A.MeV 129Xe beams were performed at 100 pnA. Theresults of these tests are presented here.

Published
2015
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14. Status of the photonuclear activation file: Reaction cross-sections, fission fragments and delayed neutrons

Author

Diane Doré, X. Ledoux, Wiliam B. Wilson, Jean-Christophe David, M. L. Giacri, Danas Ridikas, Mark B. Chadwick, and Aymeric Van Lauwe

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Isotope, Prompt neutron, Fission, Photofission, Radioactive waste, Nuclear material, Actinide, Instrumentation, Delayed neutron
Abstract

Recently a renewed interest in photonuclear reactions has appeared. It is motivated by a number of different applications where progress in reliable and, in some cases, very high-intensity electron accelerators was awaited. In particular, today's interest is linked to the nuclear material interrogation and non-destructive nuclear waste characterization, both based either on prompt neutron, or delayed neutron, or delayed gamma detection following photofission. The knowledge of photonuclear reactions is also extremely important in the design of electron accelerators used for medical applications, nuclear physics, photoneutron sources, radioactive ion beam production, etc. In this paper we present the photonuclear activation file (PAF) under development to be included into any material depletion code. By now the PAF contains the photonuclear cross-sections for more than 600 isotopes, fission fragment distributions and delayed neutron evaluations for most of the actinides in the photon energy range from 0 up to 25 MeV. Theoretical predictions, evaluated data files and available experimental data were used to construct the PAF, and some benchmarks are in progress to ensure its quality. The release of the first version of PAF is planned in 2006.

Published
2006
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15. Delayed neutron yields and spectra from photofission of actinides with bremsstrahlung photons below 20 MeV

Author

X. Ledoux, M. L. Giacri, Jean-Christophe David, A. Van Lauwe, M. Petit, Diane Doré, J.-M. Laborie, and Danas Ridikas

Subjects
Physics, History, Photon, Fission, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Bremsstrahlung, Photofission, Actinide, Spectral line, Computer Science Applications, Education, Nuclear physics, Nuclear Experiment, Delayed neutron
Abstract

Experimental results for the photofission of 238U with an endpoint Bremsstrahlung emission of 15 MeV are presented. Absolute yield and time characteristics of the delayed neutrons are extracted. In parallel, calculations for fission fragment distributions and corresponding delayed neutron parameters are given and compared to data.

Published
2006
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16. Two-step process for micro-lens-fibre fabrication using a continuous CO2laser source

Author

Renaud Bachelot, Abdelrafik Malki, and Frederic Van Lauwe

Subjects
Microlens, Fabrication, Optical fiber, Materials science, business.industry, Single-mode optical fiber, Physics::Optics, Laser, Atomic and Molecular Physics, and Optics, law.invention, Optics, law, Focal length, business, Beam (structure), Gaussian beam
Abstract

Hemispherical micro-lenses have been fabricated using a single-mode optical fibre end. The process consists of a new two-step fabrication using only a continuous CO2 laser source. In the first step, the fibre is heated with the laser and stretched until it splits, resulting in two symmetrical tapers. In the second step, the micro-lens is formed by melting the rotating fibre tip. Parameters of heating and stretching are optimized to ensure reproducibility. Characterizations have been performed and confirm the assumed Gaussian beam profile. We performed the focal length and beam waist measurements and compared them with theoretical approximations. We showed the flexibility of the fabrication process and the interest of micro-lenses in several applications.

Published
2001
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18. Bimodality: a robust signature of the first phase transition of nuclear matter

Author

M. PICHON, B. TAMAIN, R. BOUGAULT, O. LOPEZ, M. L. BEGEMAN BLAICH, R. BITTIGER, B. BORDERIE, A. CHBIHI, R. DAY RAS, D. DURAND, C. ESCANO RODRIGUEZ, J. D. FRANKLAND, E. GALICHET, D. GOURIO, D. GUINET, B. GUIOT, S. HUDAN, P. LAUTESSE, F. LAVAUD, A. LE FEVRE, N. LE NEINDRE, J. LUKASIK, U. LYNEN, A. MIGNON, W. J. F. MULLER, L. MANDUCI, J. MARIE, L. NALPAS, H. ORTH, M. PARLOG, M. F. RIVET, A. SAIJA, C. SCHWARTZ, C. SFIENTI, W. TRAUTMANN, A. TRZCINSKI, K. TURZ, A. VAN LAUWE, E. VIENT, C. VOLANT, J. P. WIELEZCKO E. B. ZWIEGLINSKI, E. ROSATO, VIGILANTE, MARIANO, M., Pichon, B., Tamain, R., Bougault, O., Lopez, M. L., BEGEMAN BLAICH, R., Bittiger, B., Borderie, A., Chbihi, R., DAY RAS, D., Durand, C., ESCANO RODRIGUEZ, J. D., Frankland, E., Galichet, D., Gourio, D., Guinet, B., Guiot, S., Hudan, P., Lautesse, F., Lavaud, A., LE FEVRE, N., LE NEINDRE, J., Lukasik, U., Lynen, A., Mignon, W. J. F., Muller, L., Manduci, J., Marie, L., Nalpa, H., Orth, M., Parlog, M. F., Rivet, A., Saija, C., Schwartz, C., Sfienti, W., Trautmann, A., Trzcinski, K., Turz, A., VAN LAUWE, E., Vient, Vigilante, Mariano, C., Volant, J. P. WIELEZCKO E. B., Zwieglinski, and E., Rosato

Published
2005

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

Author

J. D. FRANKLAND, A. MIGNON, A. CHBIHI, S. HUDAN, C. ESCANO RODRIGUEZ, G. AUGER, M. L. BEGEMANN BLAICH, N. BEL LAIZE, R. BITTINGER, B. BORDERIE, R. BOUGAULT, B. BOURIQUET, A. M. BUTA, J. L. CHARVET, J. COLIN, D. CUSSOL, R. DAYRAS, N. DE CESARE, A. DEMEYER, D. DOR, D. DURAND, E. GALICHET, E. GERLIC, D. GOURIO, D. GUINET, B. GUIOT, G. LANZALONE, P. LAUTESSE, F. LAVAUD, J. L. LAVILLE, J. F. LECOLLEY, A. LE FVRE, R. LEGRAIN, N. LE NEINDRE, O. LOPEZ, U. LYNEN, W. F. J. MLLER, L. MANDU CI, J. MARIE L. NALPAS, J. NORMAND, H. ORTH, M. PRLOG, P. PAWLOWSKI, M. PICHON, E. PLAGNOL, M. F. RIVET, E. ROSATO, R. ROY, A. SAIJA, C. SFIENTI, C. SCHWARZ, J. C. STECKMEYER, G. TABACARU, B. TAMAIN, W. TRAUTMANN, A. TRCZINSKI, K. TURZ, A. VAN LAUWE, E. VIENT, C. VOLANT, J. P. WIELECZKO AND B. ZWIEGLINSKI, VIGILANTE, MARIANO, J. D., Frankland, A., Mignon, A., Chbihi, S., Hudan, C., ESCANO RODRIGUEZ, G., Auger, M. L., BEGEMANN BLAICH, N., BEL LAIZE, R., Bittinger, B., Borderie, R., Bougault, B., Bouriquet, A. M., Buta, J. L., Charvet, J., Colin, D., Cussol, R., Dayra, N., DE CESARE, A., Demeyer, D., Dor, D., Durand, E., Galichet, E., Gerlic, D., Gourio, D., Guinet, B., Guiot, G., Lanzalone, P., Lautesse, F., Lavaud, J. L., Laville, J. F., Lecolley, A., LE FVRE, R., Legrain, N., LE NEINDRE, O., Lopez, U., Lynen, W. F. J., Mller, L., MANDU CI, J. MARIE L., Nalpa, J., Normand, H., Orth, M., Prlog, P., Pawlowski, M., Pichon, E., Plagnol, M. F., Rivet, E., Rosato, R., Roy, A., Saija, C., Sfienti, C., Schwarz, J. C., Steckmeyer, G., Tabacaru, B., Tamain, W., Trautmann, A., Trczinski, K., Turz, A., VAN LAUWE, E., Vient, Vigilante, Mariano, C., Volant, and J. P. WIELECZKO AND B., Zwieglinski

Published
2005

20. Correlations between different signals of the liquid-gas phase transition in nuclei

Author

M. F. RIVET, N. LE NEINDRE, J. P. WIELECZKO, B. BORDERIE, R. BOUGAULT, A. CHBIHI, J. D. FRANKLAND, M. PRLOG, M. PICHON, B. TAMAIN, G. AUGER, M. L. BEGEMANN BLAICH, N. BELLAIZE, R. BITTINGER, B. BOURIQUET, A. M. BUTA, J. L. CHARVET, J. COLIN, D. CUSSOL, R. DAYRAS, N. DE CESARE, A. DEMEYER, D. DOR, D. DURAND, C. ESCANO RODRIGUEZ, E. GALICHET, E. GERLIC, D. GOURIO, D. GUINET, B. GUIOT, S. HUDAN, G. LANZALONE, P. LAUTESSE, F. LAVAUD, J. L. LAVILLE, J. F. LECOLLEY, A. LE FVRE, R. LEGRAIN, O. LOPEZ, U. LYNEN, A. MIGNON, W. F. J. MLLER, L. MANDU CI, J. MARIE L. NALPAS, J. NORMAND, H. ORTH, P. PAWLOWSKI, E. PLAGNOL, R. ROY, A. SAIJA, C. SFIENTI, C. SCHWARZ, J. C. STECKMEYER, G. TABACARU, W. TRAUTMANN, A. TRCZINSKI, K. TURZ, A. VAN LAUWE, E. VIENT, C. VOLANT, AND B. ZWIEGLINSKI, E. ROSATO, VIGILANTE, MARIANO, M. F., Rivet, N., LE NEINDRE, J. P., Wieleczko, B., Borderie, R., Bougault, A., Chbihi, J. D., Frankland, M., Prlog, M., Pichon, B., Tamain, G., Auger, M. L., BEGEMANN BLAICH, N., Bellaize, R., Bittinger, B., Bouriquet, A. M., Buta, J. L., Charvet, J., Colin, D., Cussol, R., Dayra, N., DE CESARE, A., Demeyer, D., Dor, D., Durand, C., ESCANO RODRIGUEZ, E., Galichet, E., Gerlic, D., Gourio, D., Guinet, B., Guiot, S., Hudan, G., Lanzalone, P., Lautesse, F., Lavaud, J. L., Laville, J. F., Lecolley, A., LE FVRE, R., Legrain, O., Lopez, U., Lynen, A., Mignon, W. F. J., Mller, L., MANDU CI, J. MARIE L., Nalpa, J., Normand, H., Orth, P., Pawlowski, E., Plagnol, R., Roy, A., Saija, C., Sfienti, C., Schwarz, J. C., Steckmeyer, G., Tabacaru, W., Trautmann, A., Trczinski, K., Turz, A., VAN LAUWE, E., Vient, Vigilante, Mariano, C., Volant, AND B., Zwieglinski, and E., Rosato

Published
2005

21. Dynamical effects in multifragmentation at intermediate energies

Author

J. COLIN, D. CUSSOL, J. NORMAND, N. BELLAIZE, R. BOUGAULT, A. M. BUTA, D. DURAND, O. LOPEZ, L. MANDUCI, J. MARIE, J. C. STECKMEYER, B. TAMAIN, A. VAN LAUWE, E. VIENT, B. BORDERIE, F. LAVAUD, N. LE NEINDRE, P. PAWLOWSKI, E. PLAGNOL, M. F. RIVET, B. BOURIQUET, A. CHBIHI, J. D. FRANKLAND, D. GUINET, B. GUIOT, S. HUDAN, J. P. WIELEZCKO, J. L. CHARVET, R. DAYRAS, E. GALICHET, P. LAUTESSE, L. NALPAS, M. PARLOG, R. ROY, M. VIGILANTE E. C. VOLANT, ROSATO, ELIO, J., Colin, D., Cussol, J., Normand, N., Bellaize, R., Bougault, A. M., Buta, D., Durand, O., Lopez, L., Manduci, J., Marie, J. C., Steckmeyer, B., Tamain, A., VAN LAUWE, E., Vient, B., Borderie, F., Lavaud, N., LE NEINDRE, P., Pawlowski, E., Plagnol, M. F., Rivet, B., Bouriquet, A., Chbihi, J. D., Frankland, D., Guinet, B., Guiot, S., Hudan, J. P., Wielezcko, J. L., Charvet, R., Dayra, E., Galichet, P., Lautesse, L., Nalpa, M., Parlog, R., Roy, Rosato, Elio, and M. VIGILANTE E. C., Volant

Published
2003

22. Characteristics of the fragments produced in central collisions of 129Xe+natSn from 32 to 50 A.MeV

Author

S. HUDAN, A. CHBIHI, J. D. FRANKLAND, A. MIGNON, J. P. WIELEZCKO, G. AUGER, N. BELLAIZE, B. BORDERIE, A. BOTVINA, R. BOUGAULT, B. BOURIQUET, A. M. BUTA, J. COLIN, D. CUSSOL, R. DAYRAS, D. DURAND, E. GALICHET, D. GUINET, B. GUIOT, G. LANZA LONE, P. LAUTESSE, F. LAVAUD, J. F. LECOLLEY, R. LEGRAIN, N. LE NEINDRE, O. LOPEZ, L. MANDUCI, J. MARIE, L. NALPAS, J. NORMAND, M. PARLOG, P. PAWLOWSKI, M. PICHON, E. PLAGNOL, M. F. RIVET, R. ROY, J. C. STECKMEYER, G. TABACARU, B. TAMAIN, A. VAN LAUWE, E. VIENT, M. VIGILANTE E. C. VOLANT, ROSATO, ELIO, S., Hudan, A., Chbihi, J. D., Frankland, A., Mignon, J. P., Wielezcko, G., Auger, N., Bellaize, B., Borderie, A., Botvina, R., Bougault, B., Bouriquet, A. M., Buta, J., Colin, D., Cussol, R., Dayra, D., Durand, E., Galichet, D., Guinet, B., Guiot, G., LANZA LONE, P., Lautesse, F., Lavaud, J. F., Lecolley, R., Legrain, N., LE NEINDRE, O., Lopez, L., Manduci, J., Marie, L., Nalpa, J., Normand, M., Parlog, P., Pawlowski, M., Pichon, E., Plagnol, M. F., Rivet, Rosato, Elio, R., Roy, J. C., Steckmeyer, G., Tabacaru, B., Tamain, A., VAN LAUWE, E., Vient, and M. VIGILANTE E. C., Volant

Published
2003

23. Impact Of Interventions By Consortium For Improving Agriculture-Based Livelihoods In Central Africa (Cialca) On Food And Nutrition Security Of Farmer Households

Author

Ekesa B. Nakhauka, De Lange M., Macharia I., Garming H., Ouma E., Birachi E., Van Asten P., Van-Lauwe B., and Blomme G.

Subjects
Nutrition security, Food security, Farmer-households
Abstract

Impact of adopting products promoted by the Consortium for Improving Agriculture-based livelihoods in Central Africa (CIALCA) on food and nutrition security was tested. Multi-stage sampling was used to select 7 project mandate areas, 5 villages/mandate area (stratified into action, satellite and control sites) and 913 households. Structured questionnaires were administered; analysis of impact based on comparison between stratums, differences in means tested by ANOVA and significance of difference obtained by Tukey's HSD multiple rank tests. Perception of adequate food sufficiency received a higher rating in action and satellite sites compared to control sites reason being improved agricultural technologies. For >60% of households, worsened food security was due to climatic conditions. Although a higher proportion of households in action and satellite was meeting calorie RDIs in DRC and Burundi the difference was insignificant from control sites. 53% of respondents in control sites indicated a decrease in intake of protein rich foods, this was significantly higher than the proportion in the action (46%) and satellite (41%) sites., {"references":["FAO, \"Household food security and community nutrition,\" Nutrition \nand consumer protection. Agriculture and consumer protection \ndepartment. 2010.","T. Benson, \"Africa's food and nutrition security situation,\" International \nFood Policy Research Institute (IFPRI), 2020 discussion paper 37.\" \n2004.","A Mukhebi, S. Mbogoh and K. Matungulu).An overview of the food \nsecurity situation in eastern Africa. Economic commission for Africa \nsub-regional office for eastern Africa. 2011.","J. K. Sehmi, \"National food composition tables and the planning of \nsatisfactory diets in Kenya.\" Government Printers, Nairobi.Kenya.1993.","B. N. Ekesa, G Blomme and H Garming, \"Dietary diversity and \nnutritional status of pre-school children from Musa-dependent \nhouseholds in Gitega (Burundi) and Butembo (Democratic Republic of \nCongo),\"African Journal of Food, Agriculture, and Development.2010, \nVolume 11 No. 4.","P. Vinck, C. Brunelli, K. Takenoshita, D. Chizelema, \"Comprehensive \nFood Security and Vulnerability Analysis and Nutrition Survey \nRwanda.\"Government of Rwanda and United Nationa-Rwanda. 2009.","WFP Food security and vulnerability analysis report, Vulnerability, \nanalysis and mapping, Burundi.2004.","G.L. Kennedy, \"Evaluation of dietary diversity scores for assessment of \nmicronutrient intake and food security in developing countries,\" \nWageningen University (VLAG). 2009."]}

Published
2013
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24. Multifragmentation in central collisions at intermediate energies: a fast process?

Author

A. VAN LAUWE, D. DURAND, G. AUGER, C.H. O. BACRI, N. BELLAIZE, B. BORDERIE, R. BOUGAULT, B. BOURIQUET, A. M. BUTA, A. CHBIHI, J. COLIN, D. CUSSOL, R. DAYRAS, N. DE CESARE, D. DOR, J. D. FRANKLAND, E. GALICHET, E. GERLIC, D. GUINET, B. GUIOT, S. HUDAN, G. LANZALONE, P. LAUTESSE, F. LAVAUD, J. F. LECOLLEY, R. LEGRAIN, N. LE NEINDRE, O. LOPEZ, L. NALPAS, J. NORMAND, M. PARLOG, P. PAWLOWSKI, E. PLAGNOL, M. F. RIVET, R. ROY, J. C. STECKMEYER, G. TABACARU, B. TAMAIN, E. VIENT, C. VOLANT, J. P. WIELEZCKO, ROSATO, ELIO, VIGILANTE, MARIANO, I.Iori, A.Moroni, A., VAN LAUWE, D., Durand, G., Auger, Bacri, C. H. O., N., Bellaize, B., Borderie, R., Bougault, B., Bouriquet, A. M., Buta, A., Chbihi, J., Colin, D., Cussol, R., Dayra, N., DE CESARE, D., Dor, J. D., Frankland, E., Galichet, E., Gerlic, D., Guinet, B., Guiot, S., Hudan, G., Lanzalone, P., Lautesse, F., Lavaud, J. F., Lecolley, R., Legrain, N., LE NEINDRE, O., Lopez, L., Nalpa, J., Normand, M., Parlog, P., Pawlowski, E., Plagnol, M. F., Rivet, Rosato, Elio, R., Roy, J. C., Steckmeyer, G., Tabacaru, B., Tamain, E., Vient, Vigilante, Mariano, and C. VOLANT, J. P. WIELEZCKO

Abstract

XL Bormio

Published
2002

25. Chronic posttraumatic bursitis of the medial collateral ligament: surgical treatment in 2 high-level professional athletes

Author

Johan Van Lauwe, Hilde Vandenneucker, Johan Bellemans, and K Corten

Subjects
Adult, Male, medicine.medical_specialty, Bursitis, Physical Therapy, Sports Therapy and Rehabilitation, Knee Injuries, Soccer, medicine, Humans, Orthopedics and Sports Medicine, Surgical treatment, Medial collateral ligament, biology, Athletes, business.industry, Collateral Ligaments, biology.organism_classification, medicine.disease, Surgery, medicine.anatomical_structure, Chronic Disease, Ligament, Physical therapy, Female, business, Martial Arts
Published
2009

26. A new surgical technique for medial collateral ligament balancing: multiple needle puncturing

Author

Johan, Bellemans, Hilde, Vandenneucker, Johan, Van Lauwe, and Jan, Victor

Subjects
Adult, Aged, 80 and over, Joint Instability, Male, Knee Joint, Medial Collateral Ligament, Knee, Punctures, Middle Aged, Osteoarthritis, Knee, Biomechanical Phenomena, Surgery, Computer-Assisted, Needles, Humans, Female, Range of Motion, Articular, Arthroplasty, Replacement, Knee, Aged
Abstract

In this article, we present our experience with a new technique for medial soft tissue balancing, where we make multiple punctures in the medial collateral ligament (MCL) using a 19-gauge needle, to progressively stretch the MCL until a correct ligament balance is achieved. Ligament status was evaluated both before and after the procedure using computer navigation and mediolateral stress testing. The procedure was considered successful when 2 to 4-mm mediolateral joint line opening was obtained in extension and 2 to 6 mm in flexion. In 34 of 35 cases, a progressive correction of medial tightness was achieved according to the above described criteria. One case was considered overreleased in extension. Needle puncturing is a new, effective, and safe technique for progressive correction of MCL tightness in the varus knee.

Published
2008

27. Nuclear data needs for decommissioning and design of nuclear facilities

Author

J.M. Dumas, S. Delacroix, A. Van Lauwe, V. Blideanu, I.C. Sagrado García, and Danas Ridikas

Subjects
Nuclear facilities, Engineering, business.industry, High intensity, Nuclear engineering, Reaction model, Nuclear data, business, Dose rate, Nuclear decommissioning
Abstract

Design and decommissioning of large-scale nuclear facilities is nowadays a high-interest activity for the nuclear community. Nuclear data have an important role in R&D studies for accelerator-based applications and decommissioning of nuclear facilities including nuclear reactors. Most of these studies use simulations to predict activity levels and dose rates, to design shielding components, etc. The different data libraries and/or reaction models included in the transport codes are essential for these calculations. In this contribution we present several examples of the nuclear data usage for this type of applications. We show the importance of a correct use of nuclear data and reaction models for the accuracy of the results obtained by simulations. Installations able to provide high intensity radioactive beams (SPIRAL2, EURISOL...) are subject of sustained R&D ef- forts. There are also an important number of small cyclotrons, most of them dedicated to medical applications, with specific needs in terms of R&D studies. Decommissioning of nuclear facilities also needs dedicated activity studies. In this work we present two different examples: R&D studies for accelerator- based applications and decommissioning of nuclear facilities. Both examples clearly show the role played by nuclear data and their employment in reaction codes for the accuracy of the results obtained by simulations.

Published
2007
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28. Measurements of delayed neutron yields from neutron induced fission on 232Th

Author

A. Van Lauwe, X. Ledoux, J.-M. Laborie, Danas Ridikas, V. Macary, Diane Doré, and C. Varignon

Subjects
Nuclear physics, Chemistry, Fission, Nuclear Theory, Evaluated data, Experimental data, Nuclear data, Neutron, Nuclear Experiment, Delayed neutron
Abstract

The total delayed neutron (DN) yields from neutron induced fission on 232 Th were measured for neutron energies of 2.0, 2.4 and 16.0 MeV. In this paper, the experimental results are presented and compared to existing experimental data and evaluated data libraries. The future measurements are outlined.

Published
2007
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29. Detection of nuclear material by photon activation inside cargo containers

Author

B. Poumarede, M. L. Giacri, Sébastien Boyer, Aymeric Van Lauwe, E. Berthoumieux, Frederick Carrel, Mehdi Gmar, Diane Doré, Danas Ridikas, and Frederic Laine

Subjects
Fission products, Chemistry, Nuclear Theory, Bremsstrahlung, Photofission, Nuclear data, Particle accelerator, Nuclear material, Radiation, law.invention, Nuclear physics, law, Nuclear Experiment, Delayed neutron
Abstract

Photons with energies above 6 MeV can be used to detect small amounts of nuclear material inside large cargo containers. The method consists in using an intense beam of high-energy photons (bremsstrahlung radiation) in order to induce reactions of photofission on actinides. The measurement of delayed neutrons and delayed gammas emitted by fission products brings specific information on localization and quantification of the nuclear material. A simultaneous measurement of both of these delayed signals can overcome some important limitations due to matrix effects like heavy shielding and/or the presence of light elements as hydrogen. We have a long experience in the field of nuclear waste package characterization by photon interrogation and we have demonstrated that presently the detection limit can be less than one gram of actinide per ton of package. Recently we tried to extend our knowledge to assess the performance of this method for the detection of special nuclear materials in sea and air freights. This paper presents our first results based on experimental measurements carried out in the SAPHIR facility, which houses a linear electron accelerator with the energy range from 15 MeV to 30 MeV. Our experiments were also modeled using the full scale Monte Carlo techniques. In addition, and in a more general frame, due to the lack of consistent data on photonuclear reactions, we have been working on the development of a new photonuclear activation file (PAF), which includes cross sections for more than 600 isotopes including photofission fragment distributions and delayed neutron tables for actinides. Therefore, this work includes also some experimental results obtained at the ELSA electron accelerator, which is more adapted for precise basic nuclear data measurements.

Published
2006
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30. Cementless total knee arthroplasty with Profix: a 8- to 10-year follow-up study

Author

Johan Van Lauwe, Francois Hardeman, Johan Bellemans, and Hilde Vandenneucker

Subjects
musculoskeletal diseases, Male, Reoperation, medicine.medical_specialty, Aseptic loosening, Total knee arthroplasty, Osteoarthritis, Prosthesis Design, Condyle, Total knee, Survivorship curve, Medicine, Humans, Orthopedics and Sports Medicine, Prospective Studies, Arthroplasty, Replacement, Knee, Aged, business.industry, 10 year follow up, Osteoarthritis, Knee, medicine.disease, Surgery, Treatment Outcome, Databases as Topic, Patient Satisfaction, Female, Implant, business, Knee Prosthesis, Follow-Up Studies
Abstract

A consecutive series of 115 cementless Profix (Smith and Nephew, Memphis, USA) Total Knee Arthroplasties performed in 113 patients were followed in order to determine the functional results and survivorship at 8 to 10 years. All patients were included in a prospective database and were reviewed annually until final follow-up. Patients overall satisfaction was excellent or good in 91.3% of cases. The mean Knee Society's knee and function scores increased respectively from 49.3 and 36.7 preoperatively to 93.1 and 82.2 postoperatively. The Kaplan–Meier estimate of implant survival at 10 years was 97.1%. Two patients underwent revision and were considered as failures. One patient had a fracture of the medial condyle at 4 days post-surgery, and the other was revised for aseptic loosening of the tibial component at 6 years post-surgery. On the basis of this long-term follow-up study, we can conclude that the Profix Total Knee System is effective and safe.

Published
2006

32. Status of the Photonuclear Data Library for CINDER’90

Author

D. Dore, A. Van Lauwe, Mark B. Chadwick, Danas Ridikas, Jean-Christophe David, M.‐L. Giacri‐Mauborgne, and William B. Wilson

Subjects
Cinder, Physics, Nuclear physics, Computer data analysis, Computer software, Data library, Actinide
Abstract

In this article we present the development of a new photonuclear activation library for the CINDER’90 evolution code (LANL). The IAEA evaluations for 164 isotopes are explicitly included and more than 600 isotopes are added using the HMS‐ALICE predictions. GNASH evaluations are used in the case of actinides.

Published
2005
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33. Delayed Neutrons from High Energy Fission-Spallation Reactions

Author

Pavel M. Bokov, X. Ledoux, A. Plukis, Jean-Christophe David, A. Van Lauwe, M. L. Giacri, Diane Doré, R. Plukiene, and Danas Ridikas

Subjects
Nuclear physics, Liquid metal, Materials science, Fission, Neutron source, Spallation, Neutron, Nuclide, Radiation, Delayed neutron
Abstract

The next generation spallation neutron sources, neutrino factories or RIB production facilities currently being designed and constructed world wide will increase the average proton beam power on target by a few orders of magnitude. Increased proton beam power results in target thermal hydraulic issues leading to new target designs, very often based on liquid metal technologies such as Hg, Pb, or PbBi. Radioactive nuclides produced in liquid metal targets are transported into hot cells, into pumps or close to electronics with radiation sensitive components. Besides the considerable amount of photon activity in the irradiated liquid metal, a significant amount of the Delayed Neutron (DN) precursor activity can be accumulated in the target fluid. The transit time from the front of a liquid metal target into areas, where DNs may be important, can be as short as a few seconds, i.e. well within one half‐life of many DN precursors. Therefore, it seems very important to evaluate the DN flux as a function of position and determine if DNs may contribute significantly to the activation and dose rates. The multi‐particle transport code MCNPX combined with the material evolution program CINDER’90 is used to predict the DN precursors and construct the DN tables. These DN tables are employed within the generalized geometrical model of the MegaPie spallation target at PSI (Switzerland). We show that the contribution of DNs and prompt spallation neutrons to the total neutron flux is comparable at the very top of the liquid PbBi loop. We also demonstrate that these estimates of DNs within MCNPX are very much model‐dependent. No experimental data are available for DN yields and time spectra from high energy fission‐spallation reactions. An experiment to perform these measurements is proposed.

Published
2005
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34. Evaluations of Photonuclear Cross Sections for Actinides

Author

A. Van Lauwe, M.‐L. Giacri‐Mauborgne, Mark B. Chadwick, William B. Wilson, Jean-Christophe David, Diane Doré, and Danas Ridikas

Subjects
Nuclear physics, Cross section (physics), Chemistry, Data file, Photofission, Experimental data, Data library, Actinide
Abstract

This article presents calculations of photonuclear reaction cross sections for actinides by using different reaction codes, namely an improved version of HMS‐ALICE and GNASH. The GDR parameters from the RIPL2 data library are used to describe the total photo‐absorption cross section. In general, our results show satisfactory agreement with experimental data and IAEA evaluations. We plan to include our GNASH evaluations for 235U, 238U, 237Np, 239Pu, 240Pu and 241Am into a new release of the ENDF‐B/VII data files.

Published
2005
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35. Fission Fragment Distributions and Delayed Neutron Yields from Photon-Induced-Fission

Author

A. Van Lauwe, M.‐L. Giacri‐Mauborgne, Diane Doré, Danas Ridikas, and J.‐C. David

Subjects
Nuclear reaction, Physics, Nuclear physics, Fission products, Isotope, Fission, Nuclear Theory, Bremsstrahlung, Photofission, Neutron, Nuclear Experiment, Delayed neutron
Abstract

Fission fragment distributions and delayed neutron yields for 235U and 238U are provided by a complete modelization of the photofission process below 25 MeV. The absorption cross‐section parameterization and the fission fragment distributions are given and compared to experimental data. The delayed neutron yields and the half‐lives in terms of six groups are presented and compared to data obtained with a bremsstrahlung spectrum of 15 MeV.

Published
2005
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36. New approach of fragment charge correlations in $^{129}$Xe+$^{nat}$Sn central collisions

Author

L. Nalpas, O. Lopez, A. Van Lauwe, D. Cussol, C. Volant, Diane Doré, R. Dayras, J.L. Charvet, D. Durand, Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), 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), and Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear reaction, 50 MeV/n, Nuclear and High Energy Physics, Charge correlation analyses, Spinodal decomposition, 129Xe+natSn, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Bin, Nuclear physics, 25.70.Pq, 24.60.Ky, Correlation function, 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Physics, 010308 nuclear & particles physics, Plane (geometry), Random break-up simulations, Charge (physics), Central collisions, E=32, Yield (chemistry), Production (computer science), Nuclear reactions, Atomic physics, Indra multidetector
Abstract

A previous analysis of the charge (Z) correlations in the $\Delta Z-$ plane for Xe+Sn central collisions at 32 MeV/u has shown an enhancement in the production of equally sized fragments (low $\Delta Z$) which was interpreted as an evidence for spinodal decomposition. However the signal is weak and rises the question of the estimation of the uncorrelated yield. After a critical analysis of its robustness, we propose in this paper a new technique to build the uncorrelated yield in the charge correlation function. The application of this method to Xe+Sn central collision data at 32, 39, 45 and 50 MeV/u does not show any particular enhancement of the correlation function in any $\Delta Z$ bin., Comment: 23 pages, 9 figures, revised version with an added figure and minor changes. To appear in Nuclear Physics A

Published
2004
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37. Modélisation des collisions nucléaires aux énergies de Fermi : validation à l'aide des données INDRA

Author

van Lauwe, A., 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), Université de Caen, Durand Dominique, INDRA, and Base des publications de l'IN2P3, Admin

Subjects
[PHYS.NUCL] Physics [physics]/Nuclear Theory [nucl-th], [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Interactions d'ions lourds, Collisions (physique nucléaire), Modèles nucléaires
Abstract

This thesis is about the study of nuclear reactions at intermediate energies. A dedicated phenomenological model has been developed and compared with experimental data collected within the INDRA collaboration. The model is detailed in the first part of the work. Largely based on experimental facts, it uses geometrical assumptions by considering both the degrees of freedom of the nucleons and of the nuclei. In a second part, the assumptions of the model are tested and validated. After a presentation of the phase space explored during the reaction, a global comparison between the model and the experiment is performed for the system Xe + Sn from 25 to 80 MeV/u bombarding energy. Before concluding, two specific studies, one dedicated to central collisions and the other to the decay modes of the quasi-projectile in peripheral reactions are presented., Ce mémoire concerne l'étude des réactions nucléaires aux énergies intermédiaires. Un modèle phénoménologique a été élaboré et validé à l'aide des données recueillies avec le multidétecteur INDRA. Le modèle est décrit dans la première partie de la thèse. Largement inspiré de l'observation expérimentale, il est basé sur des hypothèses géométriques en considérant conjointement les degrés de liberté des nucléons et des noyaux. La deuxième partie teste et valide ces hypothèses. Après une présentation de l'espace des phases exploré lors de la collision, une comparaison globale entre le modèle et l'expérience sur le système Xe + Sn de 25 à 80 MeV/u est présentée. Avant de conclure, deux études spécifiques, une dédiée aux collisions centrales et l'autre aux modes de décroissance du quasi-projectile dans les collisions périphériques sont détaillées.

Published
2003

38. First applications of the HIPSE event generator

Author

van Lauwe, A., Lacroix, David, Durand, D., 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), Wieleczko, Lefort, and Guesnon, Sandrine

Subjects
[PHYS.NUCL] Physics [physics]/Nuclear Theory [nucl-th], [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Nuclear Experiment
Abstract

The predictions of an event generator, HIPSE (Heavy-Ion Phase-Space Exploration), dedi- cated to the description of nuclear collisions in the intermediate energy range, are compared with experimental data collected by the INDRA and INDRA-ALADIN collaborations. Spe- cial emphasis is put on the kinematical characteristics of fragments and light particles at all impact parameters for the system Xe+Sn between 25 and 80 MeV/u.

Published
2003

39. Characteristics of the fragments produced in central collisions of129Xe+natSnfrom 32Ato 50AMeV

Author

B. Guiot, Bertrand Bouriquet, J.P. Wieleczko, F. Lavaud, M. Pârlog, R. Bougault, J.C. Steckmeyer, Gerard Auger, M. Pichon, J.D. Frankland, N. Bellaize, Lautesse, Elio Rosato, E. Plagnol, Mariano Vigilante, B. Tamain, A. S. Botvina, L. Manduci, J. Marie, A. Buta, R. Dayras, A. Van Lauwe, E. Vient, E. Galichet, Alexis Mignon, G. Lanzalone, R. Roy, J. Colin, L. Nalpas, A. Chbihi, Piotr Pawłowski, D. Guinet, B. Borderie, M.F. Rivet, C. Volant, Sylvie Hudan, D. Durand, D. Cussol, Lecolley, O. Lopez, G. Tabacaru, J. Normand, Le Neindre, and R. Legrain

Subjects
Excitation function, Physics, Nuclear and High Energy Physics, Range (particle radiation), 010308 nuclear & particles physics, Relative velocity, Kinetic energy, 01 natural sciences, Charged particle, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Excitation, Energy (signal processing)
Abstract

Characteristics of the primary fragments produced in central collisions of ${}^{129}\mathrm{Xe}{+}^{\mathrm{nat}}\mathrm{Sn}$ from 32 to 50 A MeV have been obtained. By using the correlation technique for the relative velocity between light charged particles (LCP) and fragments, we were able to extract the multiplicities and average kinetic energy of secondary evaporated LCP. We then reconstructed the size and excitation energy of the primary fragments. For each bombarding energy a constant value of the excitation energy per nucleon over the whole range of fragment charge has been found. This value saturates at 3A MeV for beam energies 39A MeV and above. The corresponding secondary evaporated LCP represent less than 40% of all produced particles and decreases down to 23% for 50A MeV. The experimental characteristics of the primary fragments are compared to the predictions of statistical multifragmentation model (SMM) calculations. Reasonable agreement between the data and the calculation has been found for any given incident energy. However SMM fails to reproduce the trend of the excitation function of the primary fragment excitation energy and the amount of secondary evaporated LCP's.

Published
2003
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40. Dynamical effects in multifragmentation at intermediate energies

Author

Bertrand Bouriquet, B. Borderie, J.C. Steckmeyer, J.D. Frankland, N. Le Neindre, M.F. Rivet, C. Volant, J. Marie, A. Chbihi, Piotr Pawłowski, L. Nalpas, J. Normand, B. Guiot, J.L. Charvet, N. Bellaize, M. Pârlog, E. Galichet, A. Buta, B. Tamain, E. Vient, P. Lautesse, J. Colin, E. Plagnol, Mariano Vigilante, D. Cussol, R. Dayras, D. Guinet, F. Lavaud, R. Roy, Sylvie Hudan, R. Bougault, D. Durand, O. Lopez, E. Rosato, A. Van Lauwe, L. Manduci, J.P. Wieleczko, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), INDRA, Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Mathematical model, 010308 nuclear & particles physics, Nuclear Theory, FOS: Physical sciences, Fermi energy, nuclear fragmentation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Entrance channel, Nuclear physics, 25.70.Mn, 25.70.Pq, Fragmentation (mass spectrometry), 0103 physical sciences, heavy ion-nucleus reactions, Nuclear Experiment (nucl-ex), Atomic physics, Nuclear Experiment, 010306 general physics
Abstract

The fragmentation of the quasi-projectile is studied with the INDRA multidetector for different colliding systems and incident energies in the Fermi energy range. Different experimental observations show that a large part of the fragmentation is not compatible with the statistical fragmentation of a fully equilibrated nucleus. The study of internal correlations is a powerful tool, especially to evidence entrance channel effects. These effects have to be included in the theoretical descriptions of nuclear multifragmentation., 13 pages, 26 figures, submitted to Physical Review C

Published
2003
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42. Bimodality in binary Au + Au collisions from 60 to 100 MeV/u

Author

Pichon, M, Tamain, B, Bougault, R, Gulminelli, F, López, O, Begemann-Blaich, M L, Bittiger, R, Borderie, B, Chbihi, A, Chomaz, P, Dayras, R, Durand, D, Escano-Rodriguez, C, Frankland, J D, Galíchet, E, Gourio, D, Guinet, D, Guiot, B, Hudan, S, Lautasse, P, Lavaud, F, Lefèvre, A, Le Neindre, N, Lukasik, J, Lynen, U, Mignon, A, Müller, W F J, Manduci, L, Marie, J, Nalpas, L, Orth, H, Pârlog, M, Rivet, M F, Rosato, E, Saija, A, Schwarz, C, Sfienti, C, Trautmann, W, Trzcinski, A, Turzó, K, Van Lauwe, A, Vient, E, Vigilante, M, Volant, C, Wieleczko, J P, and Zwieglinski, B

Subjects
Nuclear Physics
Published
2003

43. Multifragmentation process for different mass asymmetry in the entrance channel around the Fermi energy

Author

N. Bellaize, O. Lopez, J.P. Wieleczko, D. Cussol, G. Auger, Ch.O. Bacri, F. Bocage, B. Borderie, R. Bougault, B. Bouriquet, R. Brou, P. Buchet, A.M. Buta, J.L. Charvet, A. Chbihi, J. Colin, R. Dayras, N. De Cesare, A. Demeyer, D. Doré, D. Durand, J.D. Frankland, E. Galichet, E. Genouin-Duhamel, E. Gerlic, B. Guiot, D. Guinet, S. Hudan, G. Lanzalone, P. Lautesse, F. Lavaud, J.L. Laville, J.F. Lecolley, R. Legrain, N. Le Neindre, L. Manduci, J. Marie, L. Nalpas, J. Normand, M. Pârlog, P. Pawłowski, E. Plagnol, M.F. Rivet, E. Rosato, R. Roy, F. Saint-Laurent, J.C. Steckmeyer, G. Tăbăcaru, B. Tamain, E. van Lauwe, L. Tassan-Got, E. Vient, M. Vigilante, C. Volant, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, Mass asymmetry, 010308 nuclear & particles physics, media_common.quotation_subject, FOS: Physical sciences, Fermi energy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Asymmetry, 3. Good health, Entrance channel, Event selection, Nuclear physics, 0103 physical sciences, Thermal, Principal component analysis, Radial flow, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, media_common
Abstract

The influence of the entrance channel asymmetry upon the fragmentation process is addressed by studying heavy-ion induced reactions around the Fermi energy. The data have been recorded with the INDRA 4pi array. An event selection method called the Principal Component Analysis is presented and discussed. It is applied for the selection of central events and furthermore to multifragmentation of single source events. The selected subsets of data are compared to the Statistical Multifragmentation Model (SMM) to check the equilibrium hypothesis and get the source characteristics. Experimental comparisons show the evidence of a decoupling between thermal and compresional (radial flow) degrees of freedom in such nuclear systems., 28 pages, 15 figures, article sumitted to Nuclear Physics A

Published
2002
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44. Characteristics of the fragments produced in central collisions of 129Xe+ natSn from 32 to 50 AMeV

Author

Hudan, S., Chbihi, A., Frankland, J.D., Mignon, A., Wieleczko, J.P., Auger, G., Bellaize, N., Borderie, B., Botvina, A., Bougault, R., Bouriquet, B., Buta, A., Colin, J., Cussol, D., Dayras, R., Durand, D., Galichet, E., Guinet, D., Guiot, B., Lanzalone, G., Lautesse, P., Lavaud, F., Lecolley, J.F., Legrain, R., Le Neindre, N., Lopez, O., Manduci, L., Marie, J., Nalpas, L., Normand, J., Pârlog, M., Pawlowski, P., Picheon, M., Plagnol, E., Rivet, M.F., Rosato, E., Roy, R., Steckmeyer, J.C., Tabacaru, G., Tamain, B., Van Lauwe, A., Vient, E., Vigilante, M., Volant, C., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), INDRA, Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
nuclei with mass number 90 to 149, 25.70.Pq, statistical models (nuclear), heavy ion-nucleus reactions, FOS: Physical sciences, nuclear fragmentation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

Characteristics of the primary fragments produced in central collisions of 129Xe + natSn from 32 to 50 AMeV have been obtained. By using the correlation technique for the relative velocity between light charged particles (LCP) and fragments, we were able to extract the multiplicities and average kinetic energy of secondary evaporated LCP. We then reconstructed the size and excitation energy of the primary fragments. For each bombarding energy a constant value of the excitation energy per nucleon over the whole range of fragment charge has been found. This value saturates at 3 AMeV for beam energies 39 AMeV and above. The corresponding secondary evaporated LCP represent less than 40% of all produced particles and decreases down to 23% for 50 AMeV. The experimental characteristics of the primary fragments are compared to the predictions of statistical multifragmentation model (SMM) calculations. Reasonable agreement between the data and the calculation has been found for any given incident energy. However SMM fails to reproduce the trend of the excitation function of the primary fragment excitation energy and the amount of secondary evaporated LCP's., Comment: 14 pages, 17 included figures; typeset using ReVTeX4; submitted to Phys. Rev. C

Published
2002
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45. Microlens fibers fabricated by a melting-tapering process using a CO<formula><roman>2</roman></formula> laser

Author

Mohamed Ketata, Abdelrafik Malki, Renaud Bachelot, Frederic Van Lauwe, Pascal Royer, and Olivier Latry

Subjects
Microlens, Distributed feedback laser, Materials science, Optical fiber, business.industry, Tapering, Laser, Semiconductor laser theory, law.invention, Optics, law, Fiber laser, Optoelectronics, Focal length, business
Abstract

Hemispherical microlenses have been fabricated at the end of a single-mode optical fiber by a new two-steps method which uses only a continuous CO2 laser. In the first step, the fiber is heated by the laser and stretched until its split resulting in two symmetrical tapers. In the second step, we form the microlenses by laser melting the taper ends. Parameters of heating and stretching are automated and optimized to ensure the reproducibility. The microlens characterization, including the focal length and beam waist measurements, has been performed. It shows the interest of the microlens-fiber to several applications.© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Published
1999
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46. Sustainable Management of Soil Organic Matter

Author

Bernard van Lauwe

Subjects
Soil management, No-till farming, Sustainable management, Agroforestry, Soil biodiversity, Soil organic matter, Environmental science, Animal Science and Zoology, Soil carbon, Agronomy and Crop Science
Published
2002
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