Anion and cation emission from water molecules after collisions with 6.6-keV $^{16}$O$^{+}$ ions
| Autor: | Violaine Vizcaino, Jimmy Rangama, Jean-Yves Chesnel, S. T. S. Kovács, Béla Sulik, A. Méry, E Lattouf, J. A. Tanis, Bernd A. Huber, Zoltán Juhász, J. C. Poully, P. Herczku, E. Bene |
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| Přispěvatelé: | Institute for Nuclear Research [Budapest] (ATOMKI), Hungarian Academy of Sciences (MTA), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), 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), Western Michigan University [Kalamazoo], This work was supported by the Hungarian Scientific Research Fund (OTKA Grant No. K128621), the French–Hungarian Cooperation Program PHC Balaton (Grant No. 38620NH), the National Research, Development and Innovation Office (NRDIO) from the Hungarian NRDI Fund (Grant No. TéT_16-1-2016-2026), and by the International Scientific Cooperation Project PICS-CNRS (Grant No. 7739 & PROJEKT 2016-2). 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. 38620NH), National Research, Development and Innovation Office (NRDIO) from the Hungarian NRDI Fund (Grant No. TéT_16-1-2016-2026), International Scientific Cooperation Project PICS-CNRS (Grant No. 7739 & PROJEKT 2016-2), Hungarian Scientific Research Fund (OTKA Grant No. K128621), European Regional Development Fund (Grant No. 32594), 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) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
electron
gas-phase H2O molecule Hydrogen Coulomb explosion Atomic Physics (physics.atom-ph) binary encounter H$_{2}$O molecule molecular collisions 01 natural sciences Dissociation (chemistry) 010305 fluids & plasmas Physics - Atomic Physics electrostatic spectroscopy Ionization transfer ionization molecular dissociation angular distribution impact parameter mass spectrometry Physics experiment cross section [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph] model calculations MOLPRO H$^{-}$ ion TOF momentum transfer [PHYS.PHYS.PHYS-ATM-PH]Physics [physics]/Physics [physics]/Atomic and Molecular Clusters [physics.atm-clus] charge transfer H- ion anion KER fragment emission energy distribution differential cross section Atomic physics vibration Atomic and Molecular Clusters (physics.atm-clus) collision thermodynamic model kinetic energy release chemistry.chemical_element FOS: Physical sciences keV energies atomic collisions Ion electronic dissociative excitation 0103 physical sciences Energy spectrum ionization recoil Molecule Physics - Atomic and Molecular Clusters electron capture 010306 general physics potential energies hydride ion Scattering statistical model scattering excitation negative ion Physics Subject Headings (PhySH): Atomic & molecular collisions cation Thermodynamic model many-body processes water molecule anion formation chemistry 13. Climate action two-body processes molecular fragmentation anion emission hydrogen time of flight mass spectroscopy binary processes [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph] post-collision interaction |
| Zdroj: | Physical Review A Physical Review A, American Physical Society, 2019, 100 (3), pp.032713. ⟨10.1103/PhysRevA.100.032713⟩ Physical Review A : Atomic, molecular, and optical physics [1990-2015] Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2019, 100 (3), pp.032713. ⟨10.1103/PhysRevA.100.032713⟩ |
| ISSN: | 1050-2947 1094-1622 |
| Popis: | DOI: https://doi.org/10.1103/PhysRevA.100.032713arXiv link: http://arxiv.org/abs/1910.00657; International audience; Anion and cation emission following water dissociation was studied for 6.6-keV $^{16}$O$^{+}$ + H$_{2}$O collisions. Absolute cross sections for the emission of all positively and negatively charged fragments, differential in both energy and observation angle, were measured. The fragments formed in hard, binary collisions appearing in peaks were distinguishable from those created in soft collisions with many-body dynamics that result in a broad energy spectrum. A striking feature is that anions and cations are emitted with similar energy and angular distributions, with a nearly constant ratio of about 1:100 for H$^{-}$ to H$^{+}$. Model calculations were performed at different levels of complexity. Four-body scattering simulations reproduce the measured fragment distributions if adequate kinetic-energy release of the target is taken into account. Providing even further insight into the underlying processes, predictions of a thermodynamic model indicate that transfer ionization at small impact parameters is the dominant mechanism for H$^{+}$ creation. The present findings confirm our earlier observation that in molecular fragmentation induced by slow, singly charged ions, the charge states of the emitted hydrogen fragments follow a simple statistical distribution independent of the way they are formed. |
| Databáze: | OpenAIRE |
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