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Maclot S, Delaunay R, Piekarski DG, Domaracka A, Huber BA, Adoui L, Martín F, Alcamí M, Avaldi L, Bolognesi P, Díaz-Tendero S, Rousseau P. Determination of Energy-Transfer Distributions in Ionizing Ion-Molecule Collisions. Phys Rev Lett 2016; 117:073201. [PMID: 27563959 DOI: 10.1103/physrevlett.117.073201] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Indexed: 06/06/2023]
Abstract
The ionization and fragmentation of the nucleoside thymidine in the gas phase has been investigated by combining ion collision with state-selected photoionization experiments and quantum chemistry calculations. The comparison between the mass spectra measured in both types of experiments allows us to accurately determine the distribution of the energy deposited in the ionized molecule as a result of the collision. The relation of two experimental techniques and theory shows a strong correlation between the excited states of the ionized molecule with the computed dissociation pathways, as well as with charge localization or delocalization.
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Affiliation(s)
- S Maclot
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
| | - R Delaunay
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
| | - D G Piekarski
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - A Domaracka
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
| | - B A Huber
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
| | - L Adoui
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
| | - F Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEANanociencia), Cantoblanco 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - M Alcamí
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEANanociencia), Cantoblanco 28049 Madrid, Spain
| | - L Avaldi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, Monterotondo Scalo, Italy
| | - P Bolognesi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, Monterotondo Scalo, Italy
| | - S Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - P Rousseau
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
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Chen T, Gatchell M, Stockett MH, Delaunay R, Domaracka A, Micelotta ER, Tielens AGGM, Rousseau P, Adoui L, Huber BA, Schmidt HT, Cederquist H, Zettergren H. Formation of H2 from internally heated polycyclic aromatic hydrocarbons: excitation energy dependence. J Chem Phys 2015; 142:144305. [PMID: 25877576 DOI: 10.1063/1.4917021] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We have investigated the effectiveness of molecular hydrogen (H2) formation from Polycyclic Aromatic Hydrocarbons (PAHs) which are internally heated by collisions with keV ions. The present and earlier experimental results are analyzed in view of molecular structure calculations and a simple collision model. We estimate that H2 formation becomes important for internal PAH temperatures exceeding about 2200 K, regardless of the PAH size and the excitation agent. This suggests that keV ions may effectively induce such reactions, while they are unlikely due to, e.g., absorption of single photons with energies below the Lyman limit. The present analysis also suggests that H2 emission is correlated with multi-fragmentation processes, which means that the [PAH-2H](+) peak intensities in the mass spectra may not be used for estimating H2-formation rates.
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Affiliation(s)
- T Chen
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - M Gatchell
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - M H Stockett
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - R Delaunay
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen cedex 05, France
| | - A Domaracka
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen cedex 05, France
| | - E R Micelotta
- Université Paris Sud, Institut d'Astrophysique Spatiale, UMR 8617, 91405 Orsay, France
| | - A G G M Tielens
- Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands
| | - P Rousseau
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen cedex 05, France
| | - L Adoui
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen cedex 05, France
| | - B A Huber
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen cedex 05, France
| | - H T Schmidt
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - H Cederquist
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - H Zettergren
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
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Chen T, Gatchell M, Stockett MH, Alexander JD, Zhang Y, Rousseau P, Domaracka A, Maclot S, Delaunay R, Adoui L, Huber BA, Schlathölter T, Schmidt HT, Cederquist H, Zettergren H. Absolute fragmentation cross sections in atom-molecule collisions: scaling laws for non-statistical fragmentation of polycyclic aromatic hydrocarbon molecules. J Chem Phys 2015; 140:224306. [PMID: 24929387 DOI: 10.1063/1.4881603] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
We present scaling laws for absolute cross sections for non-statistical fragmentation in collisions between Polycyclic Aromatic Hydrocarbons (PAH/PAH(+)) and hydrogen or helium atoms with kinetic energies ranging from 50 eV to 10 keV. Further, we calculate the total fragmentation cross sections (including statistical fragmentation) for 110 eV PAH/PAH(+) + He collisions, and show that they compare well with experimental results. We demonstrate that non-statistical fragmentation becomes dominant for large PAHs and that it yields highly reactive fragments forming strong covalent bonds with atoms (H and N) and molecules (C6H5). Thus nonstatistical fragmentation may be an effective initial step in the formation of, e.g., Polycyclic Aromatic Nitrogen Heterocycles (PANHs). This relates to recent discussions on the evolution of PAHNs in space and the reactivities of defect graphene structures.
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Affiliation(s)
- T Chen
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - M Gatchell
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - M H Stockett
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - J D Alexander
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - Y Zhang
- Department of Mathematics, Faculty of Physics, M. V. Lomonosov Moscow State University, Leninskie Gory, 119991 Moscow, Russia
| | - P Rousseau
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen Cedex 05, France
| | - A Domaracka
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen Cedex 05, France
| | - S Maclot
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen Cedex 05, France
| | - R Delaunay
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen Cedex 05, France
| | - L Adoui
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen Cedex 05, France
| | - B A Huber
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen Cedex 05, France
| | - T Schlathölter
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands
| | - H T Schmidt
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - H Cederquist
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - H Zettergren
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
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Stockett MH, Gatchell M, Alexander JD, Bērziņš U, Chen T, Farid K, Johansson A, Kulyk K, Rousseau P, Støchkel K, Adoui L, Hvelplund P, Huber BA, Schmidt HT, Zettergren H, Cederquist H. Fragmentation of anthracene C14H10, acridine C13H9N and phenazine C12H8N2ions in collisions with atoms. Phys Chem Chem Phys 2014; 16:21980-7. [DOI: 10.1039/c4cp03293d] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Seitz F, Zettergren H, Rousseau P, Wang Y, Chen T, Gatchell M, Alexander JD, Stockett MH, Rangama J, Chesnel JY, Capron M, Poully JC, Domaracka A, Méry A, Maclot S, Vizcaino V, Schmidt HT, Adoui L, Alcamí M, Tielens AGGM, Martín F, Huber BA, Cederquist H. Ions colliding with clusters of fullerenes—Decay pathways and covalent bond formations. J Chem Phys 2013; 139:034309. [DOI: 10.1063/1.4812790] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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Zettergren H, Rousseau P, Wang Y, Seitz F, Chen T, Gatchell M, Alexander JD, Stockett MH, Rangama J, Chesnel JY, Capron M, Poully JC, Domaracka A, Méry A, Maclot S, Schmidt HT, Adoui L, Alcamí M, Tielens AGGM, Martín F, Huber BA, Cederquist H. Formations of dumbbell C118 and C119 inside clusters of C60 molecules by collision with α particles. Phys Rev Lett 2013; 110:185501. [PMID: 23683214 DOI: 10.1103/physrevlett.110.185501] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Indexed: 05/26/2023]
Abstract
We report highly selective covalent bond modifications in collisions between keV alpha particles and van der Waals clusters of C(60) fullerenes. Surprisingly, C(119)(+) and C(118)(+) are the dominant molecular fusion products. We use molecular dynamics simulations to show that C(59)(+) and C(58)(+) ions--effectively produced in prompt knockout processes with He(2+)--react rapidly with C(60) to form dumbbell C(119)(+) and C(118)(+). Ion impact on molecular clusters in general is expected to lead to efficient secondary reactions of interest for astrophysics. These reactions are different from those induced by photons.
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Affiliation(s)
- H Zettergren
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden.
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Seitz F, Holm AIS, Zettergren H, Johansson HAB, Rosén S, Schmidt HT, Ławicki A, Rangama J, Rousseau P, Capron M, Maisonny R, Domaracka A, Adoui L, Méry A, Manil B, Huber BA, Cederquist H. Polycyclic aromatic hydrocarbon-isomer fragmentation pathways: Case study for pyrene and fluoranthene molecules and clusters. J Chem Phys 2011; 135:064302. [DOI: 10.1063/1.3622589] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Holm AIS, Zettergren H, Johansson HAB, Seitz F, Rosén S, Schmidt HT, Lawicki A, Rangama J, Rousseau P, Capron M, Maisonny R, Adoui L, Méry A, Manil B, Huber BA, Cederquist H. Ions colliding with cold polycyclic aromatic hydrocarbon clusters. Phys Rev Lett 2010; 105:213401. [PMID: 21231303 DOI: 10.1103/physrevlett.105.213401] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2010] [Indexed: 05/26/2023]
Abstract
We report the first experimental study of ions interacting with clusters of polycyclic aromatic hydrocarbon (PAH) molecules. Collisions between 11.25 keV 3He+ or 360 keV 129Xe20+ and weakly bound clusters of one of the smallest PAH molecules, anthracene, show that C14H10 clusters have much higher tendencies to fragment in ion collisions than other weakly bound clusters. The ionization is dominated by peripheral collisions in which the clusters, very surprisingly, are more strongly heated by Xe20+ collisions than by He+ collisions. The appearance size is k=15 for [C ₁₄H₁₀](k)2+.
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Affiliation(s)
- A I S Holm
- Department of Physics, Stockholm University, SE-106 91 Stockholm, Sweden
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Gervais B, Giglio E, Adoui L, Cassimi A, Duflot D, Galassi ME. The H2O2+ potential energy surfaces dissociating into H+/OH+: Theoretical analysis of the isotopic effect. J Chem Phys 2009; 131:024302. [DOI: 10.1063/1.3157164] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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Maunoury L, Adoui L, Grandin JP, Noury F, Huber BA, Lamour E, Prigent C, Rozet JP, Vernhet D, Leherissier P, Pacquet JY. Afterglow mode and the new micropulsed beam mode applied to an electron cyclotron resonance ion source. Rev Sci Instrum 2008; 79:02A313. [PMID: 18315103 DOI: 10.1063/1.2812340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
An increasing number of experiments in the field of low energy ion physics (<25 keV/charge) requires pulsed beams of highly charged ions. Whereas for high-intensity beams (greater than microampere) a pulsed beam chopper, installed downstream to the analyzing dipole, is used. For low-intensity beams (<100 nA) the ion intensity delivered during the pulse may be increased by operating the electron cyclotron resonance discharge in the afterglow mode. This method gives satisfactory results (i.e., average current during the beam pulse is higher than the current in the cw mode) for high charge state ions. In this paper, we report on results of the afterglow mode for beams of (22)Ne(q+), (36)Ar(q+), and (84)Kr(q+) ions. Furthermore, a new promising "micropulsed beam" mode will be described with encouraging preliminary results for (84)Kr(27+) and (36)Ar(17+) ions.
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Affiliation(s)
- L Maunoury
- CIRIL, Bd Henri Becquerel, BP 5133, Caen Cedex 05, France
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Adoui L, Legendre S, Tarisien M, Cassimi A, Galassi ME, Giglio E, Gervais B. High LET highly charged ion-induced ionization and fragmentation of water molecules and clusters. ACTA ACUST UNITED AC 2007. [DOI: 10.1088/1742-6596/88/1/012023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Laurent G, Fernández J, Legendre S, Tarisien M, Adoui L, Cassimi A, Fléchard X, Frémont F, Gervais B, Giglio E, Grandin JP, Martín F. Kinematically complete study of dissociative ionization of by ion impact. Phys Rev Lett 2006; 96:173201. [PMID: 16712294 DOI: 10.1103/physrevlett.96.173201] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2005] [Indexed: 05/09/2023]
Abstract
We present a kinematically complete study of dissociative ionization of D(2) by 13.6 MeV/u S(15+) ions. The experiment allows us to unravel the competing mechanisms, namely, direct single ionization, autoionization of doubly excited states, ionization excitation, and double ionization, and to analyze the corresponding electron angular distribution from fixed-in-space molecules. The conclusions are supported by theoretical calculations in which the correlated motion of all electrons and nuclei and the interferences between them are described from first principles.
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Affiliation(s)
- G Laurent
- Centre Interdisciplinaire de Recherche Ions Lasers (CIRIL)-CEA-CNRS-ENSICaen, France
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Abstract
We have studied the fragmentation of water vapour molecules induced by collision with a Xe44+ beam at 6.7 MeV/u. From the measurement of the fragment time of flight, we show that the amount of fragmentation due to multiple ionization is very large. In the case of single ionization, we are able to reproduce accurately the experimental cross sections by calculating for each molecular level the single-ionization cross section in the framework of the CDW-EIS theory and with a diagram of dissociation modified with respect to the diagram obtained in the case of dipolar ionization. By using qualitative arguments based on the ability of the medium to neutralize a charged species, we tentatively extend our result to liquid water. From our analysis, we show that ionizations involving three or more ejected electrons could enhance the oxygen production. For the physicochemical phase we estimate that the rate of oxygen production by multiple ionization represents approximately 18% of the OH rate produced by single ionization.
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Chetioui A, Despiney I, Guiraud L, Adoui L, Sabatier L, Dutrillaux B. Possible role of inner-shell ionization phenomena in cell inactivation by heavy ions. Int J Radiat Biol 1994; 65:511-22. [PMID: 7910190 DOI: 10.1080/09553009414550601] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The existence of a correlation between experimental probabilities of cell inactivation by charged particles and calculated probabilities for K-vacancy production in heavy atoms (C, N, O, P) of the DNA of cell nuclei is established. Both phenomena display a similar dependence upon the linear energy transfer (LET) of incident particles. In particular for low LET values, K cross sections for various incident ions have nearly the same functional dependence on ion-LET and for higher LET-values, K cross sections display maxima which look like those of inactivation cross sections. These characteristics are well-understood features of the K-ionization phenomenon, in particular the maxima of probability occur for projectile velocities near orbital velocities of the ejected electrons. The meaning of the observed correlation is discussed in terms of deposited energy and in the light of existing experimental results on cell inactivation by X-ray absorption at K-threshold. We consider a mechanism which has already been evoked to explain these photo-absorption experiments and which assumes that a K ionization triggers a double-strand break by Coulomb explosion and energy dissipation of Auger electrons. However, it is seen that K cross sections are important for C, N and O atoms but negligible for P atoms. Thus, the lesion considered here affects other atoms than those involved in the K-photoabsorption experiments. The lesion efficiency with respect to subsequent double-strand breakage and repair processes is not yet known, however one may suspect a direct link between DNA blunt ends possibly induced by such K ionizations and cell inactivation.
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Affiliation(s)
- A Chetioui
- Groupe de Physique des Solides, CNRS URA 017, Universités Paris 7, France
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