Search

Your search keyword '"Lamour, E."' showing total 178 results
Start Over Author "Lamour, E."
178 results on '"Lamour, E."'

1. Mastering disorder in a first-order transition by ion irradiation

Author

Cervera, S., LoBue, M., Fontana, E., Eddrief, M., Etgens, V. H., Lamour, E., Macé, S., Marangolo, M., Plouet, E., Prigent, C., Steydli, S., Vernhet, D., and Trassinelli, M.

Subjects
Condensed Matter - Materials Science
Abstract

The effect of ion bombardment on MnAs single crystalline thin films is studied. The role of elastic collisions between ions and atoms of the material is singled-out as the main process responsible for modifying the properties of the material. Thermal hysteresis suppression, and the loss of sharpness of the magneto-structural phase transition are studied as a function of different irradiation conditions. While the latter is shown to be associated with the ion induced disorder at the scale of the transition correlation length, the former is related to the coupling between disorder and the large-scale elastic field associated with the phase coexistence pattern.

Published
2023
Full Text
View/download PDF

2. Testing quantum electrodynamics in extreme fields using helium-like uranium

Author

Loetzsch, R., Beyer, H. F., Duval, L., Spillmann, U., Banaś, D., Dergham, P., Kröger, F. M., Glorius, J., Grisenti, R. E., Guerra, M., Gumberidze, A., Heß, R., Hillenbrand, P.-M., Indelicato, P., Jagodzinski, P., Lamour, E., Lorentz, B., Litvinov, S., Litvinov, Yu. A., Machado, J., Paul, N., Paulus, G. G., Petridis, N., Santos, J. P., Scheidel, M., Sidhu, R. S., Steck, M., Steydli, S., Szary, K., Trotsenko, S., Uschmann, I., Weber, G., Stöhlker, Th., and Trassinelli, M.

Published
2024
Full Text
View/download PDF

3. Modulating the phase transition temperature of giant magnetocaloric thin films by ion irradiation

Author

Cervera, S., Trassinelli, M, Marangolo, M, Carrétéro, C, Garcia, V, Hidki, S, Jacquet, E, Lamour, E, Lévy, A, Macé, S, Prigent, C, Rozet, J, Steydli, S, and Vernhet, D

Subjects
Physics - Applied Physics, Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Atomic Physics
Abstract

Magnetic refrigeration based on the magnetocaloric effect at room temperature is one of the most attractive alternative to the current gas compression/expansion method routinely employed. Nevertheless, in giant magnetocaloric materials, optimal refrigeration is restricted to the narrow temperature window of the phase transition (Tc). In this work, we present the possibility of varying this transition temperature into a same giant magnetocaloric material by ion irradiation. We demonstrate that the transition temperature of iron rhodium thin films can be tuned by the bombardment of ions of Ne 5+ with varying fluences up to 10 14 ions cm --2 , leading to optimal refrigeration over a large 270--380 K temperature window. The Tc modification is found to be due to the ion-induced disorder and to the density of new point-like defects. The variation of the phase transition temperature with the number of incident ions opens new perspectives in the conception of devices using giant magnetocaloric materials.

Published
2017
Full Text
View/download PDF

4. Low energy Ne ion beam induced-modifications of magnetic properties in MnAs thin films

Author

Trassinelli, M, Carlsson, L Bernard, Cervera, S, Eddrief, M, Etgens, V, Gafton, V, Lacaze, E, Lamour, E, Lévy, M, Macé, S, Prigent, C., Rozet, J. -P., Steydli, S, Marangolo, M, and Vernhet, D

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science
Abstract

Investigations of the complex behavior of the magnetization of manganese arsenide thin films due to defects induced by irradiation of slow heavy ions are presented. In addition to the thermal hysteresis suppression already highlighted in M. Trassinelli et al., Appl. Phys. Lett. 104, 081906 (2014), we report here on new local magnetic features recorded by a magnetic force microscope at different temperatures close to the characteristic sample phase transition. Complementary measurements of the global magnetization measurements in different conditions (applied magnetic field and temperatures) enable to complete the film characterization. The obtained results suggest that the ion bombardment produces regions where the local mechanical constraints are significantly different from the average, promoting the local presence of magneto-structural phases far from the equilibrium. These regions could be responsible for the thermal hysteresis suppression previously reported, irradiation-induced defects acting as seeds in the phase transition.

Published
2016
Full Text
View/download PDF

5. Hints on the origin of the thermal hysteresis suppression in giant magnetocaloric thin films irradiatied with highly charged ions

Author

Cervera, S, Trassinelli, M, Marangolo, M, Carlsson, L. Bernard, Eddrief, M, Etgens, Victor H., Gafton, V, Hidki, S, Lamour, E, Lévy, A, Macé, S, Prigent, C, Rozet, J. -P, Steydli, S, Zheng, Y, and Vernhet, D

Subjects
Condensed Matter - Materials Science, Physics - Atomic Physics
Abstract

In a recent experiment we demonstrated the possibility to suppress the thermal hysteresis of the phase transition in giant magnetocaloric MnAs thin film by interaction with slow highly charged ions (Ne 9+ at 90 keV) [1]. This phenomenon has a major impact for possible applications in magnetic refrigeration and thus its reproducibility and robustness are of prime importance. Here we present some new investigations about the origin and the nature of the irradiation-induced defects responsible for the thermal hysteresis suppression. Considering in particular two samples that receive different ion fluences (two order of magnitude of difference), we investigate the reliability of this process. The stability of the irradiation-induced defects with respect to a soft annealing is studied by X-ray diffraction and magnetometry measurements, which provide some new insights on the mechanisms involved.

Published
2015
Full Text
View/download PDF

6. Mastering disorder in a first-order transition by ion irradiation

Author

Cervera, S., primary, LoBue, M., additional, Fontana, E., additional, Eddrief, M., additional, Etgens, V. H., additional, Lamour, E., additional, Macé, S., additional, Marangolo, M., additional, Plouet, E., additional, Prigent, C., additional, Steydli, S., additional, Vernhet, D., additional, and Trassinelli, M., additional

Published
2024
Full Text
View/download PDF

7. Accurate simultaneous lead stopping power and charge-state measurements in gases and solids: Benchmark data for basic atomic theory and nuclear applications

Author

Ishikawa, S., primary, Geissel, H., additional, Purushothaman, S., additional, Weick, H., additional, Haettner, E., additional, Iwasa, N., additional, Scheidenberger, C., additional, Sørensen, A.H., additional, Tanaka, Y.K., additional, Abel, T., additional, Äystö, J., additional, Bagchi, S., additional, Dickel, T., additional, Drozd, V., additional, Franczak, B., additional, Greiner, F., additional, Harakeh, M.N., additional, Kalantar-Nayestanaki, N., additional, Kindler, B., additional, Knöbel, R., additional, Kostyleva, D., additional, Kraft-Bermuth, S., additional, Kuzminchuk, N., additional, Lamour, E., additional, Lommel, B., additional, Mukha, I., additional, Patyk, Z., additional, Pietri, S., additional, Schaumann, G., additional, and Zhao, J., additional

Published
2023
Full Text
View/download PDF

8. Low intensity threshold values for keV X-ray production in laser-cluster interaction

Author

Prigent, C., Adoui, L., Lamour, E., Rozet, J. -P., Vernhet, D., Gobert, O., Meynadier, P., Normand, D., and Perdrix, M.

Subjects
Physics - Atomic and Molecular Clusters, Physics - Atomic Physics
Abstract

Absolute Ar XK (3 keV) and Xe XL (4 keV) photon yields are measured as a function of laser peak intensity, for large (104 - 105 atoms) argon and xenon clusters submitted to intense laser pulses. A clear threshold behavior is observed. The intensity threshold is found as low as 2 1014 Wcm-2, a value matching the production of singly-charged argon or doubly-charged xenon by optical field ionization. Possible mechanisms involved in the inner-shell ionization are discussed. The outcome on the optimization of keV X-ray production is underlined., Comment: 1 table, 4 figures. submitted to Physical Review Letters

Published
2005

9. Laser-cluster interaction: x-ray production by short laser pulses

Author

Deiss, C., Rohringer, N., Lamour, E., Prigent, C., Rozet, J. -P., Vernhet, D., and Burgdorfer, J.

Subjects
Physics - Atomic and Molecular Clusters
Abstract

We investigate the heating of the quasi-free electrons in large rare gas clusters (N exceeding 10^5 atoms) by short laser pulses at moderate intensities (I~10^{15} Wcm^{-2}). We identify elastic large-angle backscattering of electrons at ionic cores in the presence of a laser field as an efficient heating mechanism resembling the Fermi shuttle. Its efficiency as well as the effect of collective electron motion, electron-impact ionization and cluster charging, are studied employing a mean-field classical transport simulation. Results for the absolute x-ray yields are in surprisingly good quantitative agreement with recent experimental results., Comment: 5 pages,4 figures, submitted to Phys. Rev. Lett

Published
2005
Full Text
View/download PDF

10. A linear radiofrequency ion trap for accumulation, bunching, and emittance improvement of radioactive ion beams

Author

Herfurth, F., Dilling, J., Kellerbauer, A., Bollen, G., Henry, S., Kluge, H. -J., Lamour, E., Lunney, D., Moore, R. B., Scheidenberger, C., Schwarz, S., Sikler, G., and Szerypo, J.

Subjects
Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

An ion beam cooler and buncher has been developed for the manipulation of radioactive ion beams. The gas-filled linear radiofrequency ion trap system is installed at the Penning trap mass spectrometer ISOLTRAP at ISOLDE/CERN. Its purpose is to accumulate the 60-keV continuous ISOLDE ion beam with high efficiency and to convert it into low-energy low-emittance ion pulses. The efficiency was found to exceed 10% in agreement with simulations. A more than 10-fold reduction of the ISOLDE beam emittance can be achieved. The system has been used successfully for first on-line experiments. Its principle, setup and performance will be discussed.

Published
2000
Full Text
View/download PDF

12. Mass Measurements on Short-Lived Nuclides with ISOLTRAP

Author

the ISOLDE Collaboration, Bollen, G., Ames, F., Audi, G., Beck, D., Dilling, J., Engels, O., Henry, S., Herfurth, F., Kellerbauer, A., Kluge, H.-J., Kohl, A., Lamour, E., Lunney, D., Moore, R. B., Oinonen, M., Scheidenberger, C., Schwarz, S., Sikler, G., Szerypo, J., Weber, C., Lunney, David, editor, Audi, Georges, editor, and Kluge, H.-Jürgen, editor

Published
2001
Full Text
View/download PDF

15. 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
Full Text
View/download PDF

17. NEWGAIN White Book - Science Requirements - Work Package Physics

Author

Ackermann, D., Blank, B., Caceres, L., Caamaño, M., France, G., Gall, B., Grévy, S., Grygiel, C., Lamour, E., Ledoux, X., Manea, V., Ch. Peaucelle, Rangama, J., Redon, N., Gheorghe Iulian Stefan, Ch. Stodel, Sulignano, B., Ch. Theisen, 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), Universidade de Santiago de Compostela [Spain] (USC ), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Matériaux, Défauts et IRradiations (MADIR), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Institut des Nanosciences de Paris (INSP), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), 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), Atomes, Molécules et Agrégats (AMA), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, GANIL - document link: https://www.ganil-spiral2.eu/scientists/ganil-spiral-2-facilities/accelerators/newgain, 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 National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)

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

The new injector for SPIRAL2 at GANIL, NEWGAIN is presently in its design phase. The major constraints for its technical concepts are determined by the requirements of its future users, the national French and the international scientific communities. The facility will offer heavy ion beams of unmatched intensity for fundamental and applied research. This document reports on the specific requirements of the scientific communities in terms of beam energy, intensity, time structure and other features which are needed to conduct the envisaged research programs at the experimental installations, which are or will be coupled to the linear accelerator of the SPIRAL2 facility at GANIL. It aims at fostering the information exchange between the scientific community and the technical and engineering team who is designing, planning and constructing NEWGAIN. The document has been elaborated by the members of the Work Package Physics (WPP) of the NEWGAIN project, consisting of the scientific coordinators of the institutions contributing to and participating in NEWGAIN, and representatives of the various scientific collaborations engaged in the exploitation of the SPIRAL2 accelerator facility. The document is organized with active links to sections, subsections, figures, tables and literature references integrated in the text.

Published
2021

18. Surface chemistry of gold nanoparticles produced by laser ablation in pure and saline water

Author

Lévy, A. (Anna), De Anda Villa, M. (Manuel), Laurens, G. (Gaétan), Blanchet, V. (Valérie), Bozek, J. (John), Gaudin, J. (Jérȏme), Lamour, E. (Emily), Macé, S. (Stéphane), Mignon, P. (Pierre), Milosavljević, A. R. (Aleksandar R.), Nicolas, C. (Christophe), Patanen, M. (Minna), Prigent, C. (Christophe), Robert, E. (Emmanuel), Steydli, S. (Sébastien), Trassinelli, M. (Martino), Vernhet, D. (Dominique), Veteläinen, O. (Onni), Amans, D. (David), Lévy, A. (Anna), De Anda Villa, M. (Manuel), Laurens, G. (Gaétan), Blanchet, V. (Valérie), Bozek, J. (John), Gaudin, J. (Jérȏme), Lamour, E. (Emily), Macé, S. (Stéphane), Mignon, P. (Pierre), Milosavljević, A. R. (Aleksandar R.), Nicolas, C. (Christophe), Patanen, M. (Minna), Prigent, C. (Christophe), Robert, E. (Emmanuel), Steydli, S. (Sébastien), Trassinelli, M. (Martino), Vernhet, D. (Dominique), Veteläinen, O. (Onni), and Amans, D. (David)

Abstract

Pulsed laser ablation in liquid (PLAL) is a powerful method for producing nanoparticle colloids with a long-term stability despite the absence of stabilizing organic agents. The colloid stability involves different reactivities and chemical equilibria with complex ionic-specific effects at the nanoparticle/solvent interface which must be strongly influenced by their chemical composition. In this work, the surface composition of PLAL-produced gold nanoparticles in alkaline and saline (NaBr) water is investigated by X-ray photoelectron spectroscopy on free-flying nanoparticles, exempt from any substrate or radiation damage artifact. The Au 4f photoelectron spectra with a depth profiling investigation are used to evaluate the degree of nanoparticle surface oxidation. In alkaline water, the results preclude any surface oxidation contrary to the case of nanoparticles produced in NaBr solution. In addition, the analysis of Br 3d core-level photoelectron spectra agrees with a clear signature of Br on the nanoparticle surface, which is confirmed by a specific valence band feature. This experimental study is supported by DFT calculations, evaluating the energy balance of halide adsorption on different configurations of gold surfaces including oxidation or adsorbed salts.

Published
2021

20. Aurore:a platform for ultrafast sciences

Author

Fedorov, N. (N.), Beaulieu, S. (S.), Belsky, A. (A.), Blanchet, V. (V.), Bouillaud, R. (R.), De Anda Villa, M. (M.), Filippov, A. (A.), Fourment, C. (C.), Gaudin, J. (J.), Grisenti, R. (R.E.), Lamour, E. (E.), Lévy, A. (A.), Macé, S. (S.), Mairesse, Y. (Y.), Martin, P. (P.), Martinez, P. (P.), Noé, P. (P.), Papagiannouli, I. (I.), Patanen, M. (M.), Petit, S. (S.), Vernhet, D. (D.), Veyrinas, K. (K.), Descamps, D. (D.), Fedorov, N. (N.), Beaulieu, S. (S.), Belsky, A. (A.), Blanchet, V. (V.), Bouillaud, R. (R.), De Anda Villa, M. (M.), Filippov, A. (A.), Fourment, C. (C.), Gaudin, J. (J.), Grisenti, R. (R.E.), Lamour, E. (E.), Lévy, A. (A.), Macé, S. (S.), Mairesse, Y. (Y.), Martin, P. (P.), Martinez, P. (P.), Noé, P. (P.), Papagiannouli, I. (I.), Patanen, M. (M.), Petit, S. (S.), Vernhet, D. (D.), Veyrinas, K. (K.), and Descamps, D. (D.)

Abstract

We present the Aurore platform for ultrafast sciences. This platform is based on a unique 20 W, 1 kHz, 26 fs Ti:sapphire laser system designed for reliable operation and high intensity temporal contrast. The specific design ensures the high stability in terms of pulse duration, energy, and beam pointing necessary for extended experimental campaigns. The laser supplies 5 different beamlines, all dedicated to a specific field: attosecond science (Aurore 1), ultrafast phase transitions in solids (Aurore 2 and 3), ultrafast luminescence in solids (Aurore 4), and femtochemistry (Aurore 5). The technical specifications of these five beamlines are described in detail, and examples of the recent results are given.

Published
2020

22. Mass Measurements on Short-Lived Nuclides with ISOLTRAP

Author

Bollen, G., Ames, F., Audi, G., Beck, D., Dilling, J., Engels, O., Henry, S., Herfurth, F., Kellerbauer, A., Kluge, H.-J., Kohl, A., Lamour, E., Lunney, D., Moore, R. B., Oinonen, M., Scheidenberger, C., Schwarz, S., Sikler, G., Szerypo, J., and Weber, C.

Published
2001
Full Text
View/download PDF

23. The SHIPTRAP project: A capture and storage facility at GSI for heavy radionuclides from SHIP

Author

Dilling, J., Ackermann, D., Bernard, J., Hessberger, F.P., Hofmann, S., Hornung, W., Kluge, H. J., Lamour, E., Maier, M., Mann, R., Marx, G., Moore, R.B., Münzenberg, G., Quint, W., Rodriguez, D., Schädel, M., Schönfelder, J., Sikler, G., Toader, C., Vermeeren, L., Weber, C., Bollen, G., Engels, O., Habs, D., Thirolf, P., Backe, H., Dretzke, A., Lauth, W., Ludolphs, W., and Sewtz, M.

Published
2000
Full Text
View/download PDF

24. Aurore: A platform for ultrafast sciences

Author

Fedorov, N., primary, Beaulieu, S., additional, Belsky, A., additional, Blanchet, V., additional, Bouillaud, R., additional, De Anda Villa, M., additional, Filippov, A., additional, Fourment, C., additional, Gaudin, J., additional, Grisenti, R. E., additional, Lamour, E., additional, Lévy, A., additional, Macé, S., additional, Mairesse, Y., additional, Martin, P., additional, Martinez, P., additional, Noé, P., additional, Papagiannouli, I., additional, Patanen, M., additional, Petit, S., additional, Vernhet, D., additional, Veyrinas, K., additional, and Descamps, D., additional

Published
2020
Full Text
View/download PDF

25. The low energy beamline of the FISIC experiment: current status of construction and performance

Author

Schury, D, primary, Méry, A, additional, Ramillon, J M, additional, Adoui, L, additional, Chesnel, J-Y, additional, Lévy, A, additional, Macé, S, additional, Prigent, C, additional, Rangama, J, additional, Rousseau, P, additional, Steydli, S, additional, Trassinelli, M, additional, Vernhet, D, additional, Gumberidze, A, additional, Stöhlker, Th, additional, Bräuning-Demian, A, additional, Hahn, C, additional, Spillmann, U, additional, and Lamour, E, additional

Published
2020
Full Text
View/download PDF

26. Ultrafast laser induced structural dynamics probed by time-resolved photoelectron spectroscopy

Author

Villa, M de Anda, primary, Lévy, A, additional, Gaudin, J, additional, Bouillaud, R, additional, Descamps, D, additional, Dorado, B, additional, Fedorov, N, additional, Grisenti, R, additional, Hatifi, M, additional, Jouin, H, additional, Lamour, E, additional, Macé, S, additional, Martin, P, additional, Petit, S, additional, Prigent, C, additional, Sobierajski, R, additional, Steydli, S, additional, Trassinelli, M, additional, Wawro, A, additional, and Vernhet, D, additional

Published
2020
Full Text
View/download PDF

27. Surface chemistry of colloidal surfactant-free gold nanoparticles generated by laser ablation

Author

Lévy, A, primary, De Anda Villa, M, additional, Gaudin, J, additional, Amans, D, additional, Blanchet, V, additional, Boudjada, F, additional, Bozek, J D, additional, Grisenti, R E, additional, Lamour, E, additional, Laurens, G, additional, Macé, S, additional, Milosavljević, A R, additional, Nicolas, C, additional, Papagiannouli, I, additional, Patanen, M, additional, Prigent, C, additional, Robert, E, additional, Steydli, S, additional, Trassinelli, M, additional, and Vernhet, D, additional

Published
2020
Full Text
View/download PDF

29. Assessing the surface oxidation state of free-standing gold nanoparticles produced by laser ablation

Author

De Anda Villa, M. (Manuel), Gaudin, J. (Jérôme), Amans, D. (David), Boudjada, F. (Fahima), Bozek, J. (John), Evaristo Grisenti, R. (Robert), Lamour, E. (Emily), Laurens, G. (Gaétan), Macé, S. (Stéphane), Nicolas, C. (Christophe), Papagiannouli, I. (Irene), Patanen, M. (Minna), Prigent, C. (Christophe), Robert, E. (Emmanuel), Steydli, S. (Sébastien), Trassinelli, M. (Martino), Vernhet, D. (Dominique), Lévy, A. (Anna), De Anda Villa, M. (Manuel), Gaudin, J. (Jérôme), Amans, D. (David), Boudjada, F. (Fahima), Bozek, J. (John), Evaristo Grisenti, R. (Robert), Lamour, E. (Emily), Laurens, G. (Gaétan), Macé, S. (Stéphane), Nicolas, C. (Christophe), Papagiannouli, I. (Irene), Patanen, M. (Minna), Prigent, C. (Christophe), Robert, E. (Emmanuel), Steydli, S. (Sébastien), Trassinelli, M. (Martino), Vernhet, D. (Dominique), and Lévy, A. (Anna)

Abstract

The surface chemistry of gold nanoparticles produced by the pulsed laser ablation in liquids method is investigated by X-ray photoelectron spectroscopy (XPS). The presence of surface oxide expected on these systems is investigated using synchrotron radiation in conditions close to their original state in solvent but free from substrate or solvent effects which could affect the interpretation of spectroscopic observations. For that purpose we performed the experiment on a controlled free-standing nanoparticle beam produced by combination of an atomizer and an aerodynamic lens system. These results are compared with those obtained by the standard situation of deposited nanoparticles on silicon substrate. An accurate analysis based on Bayesian statistics concludes that the existence of oxide in the free-standing conditions cannot be solely confirmed by the recorded core-level 4f spectra. If present, our data indicate an upper limit of 2.15 ± 0.68% of oxide. However, a higher credence to the hypothesis of its existence is brought by the structureless valence profile of the free-standing beam. Moreover, the cross-comparison with the deposited nanoparticles case clearly evidences an important misleading substrate effect. Experiment with free-standing nanoparticles is then demonstrated to be the right way to further investigate oxidation states on Au nanoparticles.

Published
2019

30. Roadmap on photonic, electronic and atomic collision physics: III. Heavy particles: with zero to relativistic speeds

Author

Aumayr, F., Ueda, K., Sokell, E., Schippers, S., Sadeghpour, H., Merkt, F., Gallagher, T. F., Dunning, F. B., Scheier, P., Echt, O., Kirchner, T., Fritzsche, S., Surzhykov, A., Ma, X., Rivarola, R., Fojon, O., Tribedi, L., Lamour, E., Crespo López-Urrutia, J. R., Litvinov, Y. A., Shabaev, V., Cederquist, H., Zettergren, H., Schleberger, M., (0000-0001-9451-5440) Wilhelm, R. A., Azuma, T., Boduch, P., Schmidt, H. T., Stöhlker, T., Aumayr, F., Ueda, K., Sokell, E., Schippers, S., Sadeghpour, H., Merkt, F., Gallagher, T. F., Dunning, F. B., Scheier, P., Echt, O., Kirchner, T., Fritzsche, S., Surzhykov, A., Ma, X., Rivarola, R., Fojon, O., Tribedi, L., Lamour, E., Crespo López-Urrutia, J. R., Litvinov, Y. A., Shabaev, V., Cederquist, H., Zettergren, H., Schleberger, M., (0000-0001-9451-5440) Wilhelm, R. A., Azuma, T., Boduch, P., Schmidt, H. T., and Stöhlker, T.

Abstract

We publish three Roadmaps on photonic, electronic and atomic collision physics in order to celebrate the 60th anniversary of the ICPEAC conference. Roadmap III focusses on heavy particles: with zero to relativistic speeds. Modern theoretical and experimental approaches provide detailed insight into the wide range of many-body interactions involving projectiles and targets of varying complexity ranging from simple atoms, through molecules and clusters, complex biomolecules and nanoparticles to surfaces and crystals. These developments have been driven by technological progress and future developments will expand the horizon of the systems that can be studied. This Roadmap aims at looking back along the road, explaining the evolution of the field, and looking forward, collecting nineteen contributions from leading scientists in the field.

Published
2019

33. Depth profiling of the chemical composition of free-standing carbon dots using X-ray photoelectron spectroscopy

Author

Papagiannouli, I. (Irene), Patanen, M. (Minna), Blanchet, V. (Valérie), Bozek, J. D. (John D.), de Anda Villa, M. (Manuel), Huttula, M. (Marko), Kokkonen, E. (Esko), Lamour, E. (Emily), Mevel, E. (Eric), Pelimanni, E. (Eetu), Scalabre, A. (Antoine), Trassinelli, M. (Martino), Bassani, D. M. (Dario M.), Lévy, A. (Anna), Gaudin, J. (Jérôme), Papagiannouli, I. (Irene), Patanen, M. (Minna), Blanchet, V. (Valérie), Bozek, J. D. (John D.), de Anda Villa, M. (Manuel), Huttula, M. (Marko), Kokkonen, E. (Esko), Lamour, E. (Emily), Mevel, E. (Eric), Pelimanni, E. (Eetu), Scalabre, A. (Antoine), Trassinelli, M. (Martino), Bassani, D. M. (Dario M.), Lévy, A. (Anna), and Gaudin, J. (Jérôme)

Abstract

The chemical and geometrical structure of free-standing carbon dots (Cdots) prepared from the pyrolysis of N-hydroxysuccinimide (NHS) have been characterized using X-ray photoelectron spectroscopy (XPS). An aerodynamic lens system was used to generate a sufficient particle density of monodispersed Cdots for XPS studies at the PLEIADES beamline at the SOLEIL synchrotron facility. Varying the X-ray excitation energy between 315 and 755 eV allows probing of the Cdots from the surface toward their core, owing to the kinetic energy dependence of the photoelectron inelastic mean free path. The C 1s, O 1s, and N 1s core-levels were recorded with high-spectral resolution to identify their main chemical components and branching ratios. While high-resolution transmission electron microscopy (HRTEM) reveals a defective graphitic core, the C 1s spectrum evidence two main peaks similar to those measured from the solid NHS. Their relative abundance as a function of the probing depth is strongly related to the chemical composition of the ligand shell that does not vary substantially over the first 3.4 nm. Combining the depth-resolved XPS and HRTEM studies, it was concluded that the Cdots possess a graphitic core surrounded by a relatively homogeneous shell of at least 3.4 nm thickness with a composition similar to that of the solid NHS.

Published
2018

34. Accurate masses of neutron-deficient nuclides close to [formula omitted]

Author

Schwarz, S., Ames, F., Audi, G., Beck, D., Bollen, G., De Coster, C., Dilling, J., Engels, O., Fossion, R., Garcia Ramos, J.-E., Henry, S., Herfurth, F., Heyde, K., Kellerbauer, A., Kluge, H.-J., Kohl, A., Lamour, E., Lunney, D., Martel, I., Moore, R.B., Oinonen, M., Raimbault-Hartmann, H., Scheidenberger, C., Sikler, G., Szerypo, J., and Weber, C.

Published
2001
Full Text
View/download PDF

37. Modulating the phase transition temperature of giant magnetocaloric thin films by ion irradiation

Author

Cervera, S., primary, Trassinelli, M., additional, Marangolo, M., additional, Carrétéro, C., additional, Garcia, V., additional, Hidki, S., additional, Jacquet, E., additional, Lamour, E., additional, Lévy, A., additional, Macé, S., additional, Prigent, C., additional, Rozet, J. P., additional, Steydli, S., additional, and Vernhet, D., additional

Published
2017
Full Text
View/download PDF

38. Numerical simulations of purification and final charge state analysis of the slow ion beam for the FISIC project

Author

Kumar, A., primary, Méry, A., additional, Adoui, L., additional, Chesnel, JY., additional, Lévy, A., additional, Macé, S., additional, Prigent, C., additional, Ramillon, JM., additional, Rangama, J., additional, Rozet, JP., additional, Rousseau, P., additional, Steydli, S., additional, Trassinelli, M., additional, Vernhet, D., additional, and Lamour, E., additional

Published
2017
Full Text
View/download PDF

39. Low energy Ne ion beam induced-modifications of magnetic properties in MnAs thin films

Author

Trassinelli, M, primary, Bernard Carlsson, L, additional, Cervera, S, additional, Eddrief, M, additional, Etgens, V H, additional, Gafton, E V, additional, Lacaze, E, additional, Lamour, E, additional, Lévy, A, additional, Macé, S, additional, Prigent, C, additional, Rozet, J-P, additional, Steydli, S, additional, Marangolo, M, additional, and Vernhet, D, additional

Published
2016
Full Text
View/download PDF

43. Hints on the origin of the thermal hysteresis suppression in giant magnetocaloric thin films irradiatied with highly charged ions

Author

Cervera, S, primary, Trassinelli, M, additional, Marangolo, M, additional, Carlsson, L Bernard, additional, Eddrief, M, additional, Etgens, V H, additional, Gafton, V, additional, Hidki, S, additional, Lamour, E, additional, Lévy, A, additional, Macé, S, additional, Prigent, C, additional, Rozet, J-P, additional, Steydli, S, additional, Zheng, Y, additional, and Vernhet, D, additional

Published
2015
Full Text
View/download PDF

44. Impacts of highly charged ions as seeds in a magneto-structural phase transition of magnetocaloric thin films

Author

Cervera, S, primary, Trassinelli, M, additional, Marangolo, M, additional, Bernard-Carlsson, L, additional, Eddrief, M, additional, Etgens, V H, additional, Gafton, V, additional, Hidki, S, additional, Lacaze, E, additional, Lamour, E, additional, Prigent, C, additional, Rozet, J-P, additional, Steydli, S, additional, Zheng, Y, additional, and Vernhet, D, additional

Published
2015
Full Text
View/download PDF

47. Primary processes: from atoms to diatomic molecules and clusters

Author

Fléchard, X, primary, Adoui, L, additional, Ban, G, additional, Boduch, P, additional, Cassimi, A, additional, Chesnel, J Y, additional, Durand, D, additional, Frémont, F, additional, Guillous, S, additional, Grandin, J P, additional, Hennecart, D, additional, Jacquet, E, additional, Jardin, P, additional, Lamour, E, additional, Liénard, E, additional, Lelièvre, D, additional, Maunoury, L, additional, Méry, A, additional, Naviliat-Cuncic, O, additional, Prigent, C, additional, Ramillon, J M, additional, Rangama, J, additional, Rozet, J P, additional, Steydli, S, additional, Trassinelli, M, additional, and Vernhet, D, additional

Published
2015
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results