Anion emission from H2O molecules colliding with positive O+ ions at keVenergies: the role of dissociative excitation

29th International Conference on Photonic, Electronic, and Atomic Collisions

Chesnel, J.-Y.^1 ; Juhász, Z.^2 ; Lattouf, E.^1 ; Tanis, J.A.^1,3 ; Huber, B.A.^1 ; Bene, E.^2 ; Kovács, S.T.S.^2 ; Herczku, P.^2 ; Méry, A.^1 ; Poully, J.-C.^1 ; Rangama, J.^1 ; Sulik, B.^2

Centre de Recherche sur les Ions, les Matériaux et la Photonique (CIMAP), 6 Bd Mar. Juin, Caen

F-14000, France^1

Institute for Nuclear Research, Hungarian Academy of Sciences (MTA Atomki), Debrecen

H-4001, Hungary^2

Department of Physics, Western Michigan University, Kalamazoo

MI

49008, United States^3

关键词: Anion emission;    Anion formation;    Dissociative excitations;    Electronic excitation;    Gasphase;    H2O molecules;    Ionization process;    Water molecule;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/3/032108/pdf
DOI  :  10.1088/1742-6596/635/3/032108

来源: IOP

【 摘 要 】

It is shown that negative ions can be ejected from gas-phase water molecules when bombarded with positive ions at keV energies. Emission of both H-and heavier (O-and OH-) anions is observed. Electronic excitation and ionization processes are shown to play a decisive role in cation-induced anion formation.