Anion emission from water molecules colliding with positive ions: Identification of binary and many-body processes
| Autor: | A. Méry, Jimmy Rangama, J. Y. Chesnel, Jean-Christophe Poully, Bernd A. Huber, P. Herczku, Zoltán Juhász, E. Bene, E. Lattouf, S. T. S. Kovács, Béla Sulik, J. A. Tanis |
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| Přispěvatelé: | 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), Institute for Nuclear Research [Budapest] (ATOMKI), Hungarian Academy of Sciences (MTA), Western Michigan University [Kalamazoo], This work was supported by the Transnational Access ITS-LEIF, granted by the European Project HPRI-CT-2005-026015, the Hungarian National Science Foundation OTKA (Grant No. K109440), the French-Hungarian Cooperation Program PHC Balaton (Grant No. 27860ZL/TéT_11-2-2012-0028), and the French-Hungarian CNRS-MTA Cooperation (ANION project, Grant No. 26118). J.A.T. was supported by a grant from the Basse-Normandie region (Convention No. 11P01476) and from the European Regional Development Fund (Grant No. 32594)., French-Hungarian Cooperation Program PHC Balaton (Grant No. 27860ZL/TéT_11-2-2012-0028), French-Hungarian CNRS-MTA Cooperation No. 26118 (ANION project), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
gas-phase
H2O molecule Hydrogen Atomic Physics (physics.atom-ph) model calculations 01 natural sciences Physics - Atomic Physics electrostatic spectroscopy Ionization molecular dissociation Physics::Chemical Physics Nuclear Experiment 010303 astronomy & astrophysics Negative ion Physics [PHYS]Physics [physics] experiment [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph] TOF [PHYS.PHYS.PHYS-ATM-PH]Physics [physics]/Physics [physics]/Atomic and Molecular Clusters [physics.atm-clus] charge transfer H- ion KER Atomic and Molecular Physics and Optics 3. Good health Time of flight radiobiology applications Astrophysics::Earth and Planetary Astrophysics Atomic physics Atomic and Molecular Clusters (physics.atm-clus) collision kinetic energy release Electron capture chemistry.chemical_element FOS: Physical sciences keV energies PACS numbers: 34.50.-s 34.70.+e Kinetic energy atomic collisions Ion electronic dissociative excitation Physics - Chemical Physics MOLPRO 0103 physical sciences ionization Molecule Physics - Atomic and Molecular Clusters electron capture 010306 general physics Chemical Physics (physics.chem-ph) hydride anion astrophysical applications cross sections radiochemistry applications many-body processes water molecule anion formation chemistry two-body processes Yield (chemistry) hydrogen anion emission molecular fragmentation time of flight mass spectroscopy binary processes [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph] |
| Zdroj: | Physical Review A : Atomic, molecular, and optical physics [1990-2015] Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2015, 91 (6), pp.060701(R). ⟨10.1103/PhysRevA.91.060701⟩ Physical Review A Physical Review A, American Physical Society, 2015, 91 (6), pp.060701(R). ⟨10.1103/PhysRevA.91.060701⟩ |
| ISSN: | 1050-2947 1094-1622 |
| Popis: | It is shown that negative ions are ejected from gas-phase water molecules when bombarded with positive ions at keV energies typical of solar-wind velocities. This finding is relevant for studies of planetary and cometary atmospheres, as well as for radiolysis and radiobiology. Emission of both H- and heavier (O- and OH-) anions, with a larger yield for H-, was observed in 6.6-keV 16O+ + H2O collisions. The ex-perimental setup allowed separate identification of anions formed in collisions with many-body dynamics from those created in hard, binary collisions. Most of the ani-ons are emitted with low kinetic energy due to many-body processes. Model calcu-lations show that both nucleus-nucleus interactions and electronic excitations con-tribute to the observed large anion emission yield. 5 pages, 4 figures |
| Databáze: | OpenAIRE |
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