Anion emission from water molecules colliding with positive ions: Identification of binary and many-body processes

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

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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-keV16O++H2O collisions. The experimental setup allowed separate identification of anions formed in collisions with many-body dynamics from those created in hard, binary collisions. Most of the anions are emitted with low kinetic energy due to many-body processes. Model calculations show that both nucleus-nucleus interactions and electronic excitations contribute to the observed large anion emission yield.

Original languageEnglish
Article number060701
JournalPhysical Review A
Volume91
Issue number6
DOIs
Publication statusPublished - Jun 29 2015

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positive ions
anions
water
collisions
molecules
cometary atmospheres
radiobiology
solar wind velocity
planetary atmospheres
nuclei
radiolysis
negative ions
kinetic energy
vapor phases
electronics
excitation
interactions
energy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Anion emission from water molecules colliding with positive ions : Identification of binary and many-body processes. / Chesnel, J. Y.; Juhász, Z.; Lattouf, E.; Tanis, J. A.; Huber, B. A.; Bene, E.; Kovács, S. T S; Herczku, P.; Méry, A.; Poully, J. C.; Rangama, J.; Sulik, B.

In: Physical Review A, Vol. 91, No. 6, 060701, 29.06.2015.

Research output: Contribution to journalArticle

Chesnel, JY, Juhász, Z, Lattouf, E, Tanis, JA, Huber, BA, Bene, E, Kovács, STS, Herczku, P, Méry, A, Poully, JC, Rangama, J & Sulik, B 2015, 'Anion emission from water molecules colliding with positive ions: Identification of binary and many-body processes', Physical Review A, vol. 91, no. 6, 060701. https://doi.org/10.1103/PhysRevA.91.060701
Chesnel, J. Y. ; Juhász, Z. ; Lattouf, E. ; Tanis, J. A. ; Huber, B. A. ; Bene, E. ; Kovács, S. T S ; Herczku, P. ; Méry, A. ; Poully, J. C. ; Rangama, J. ; Sulik, B. / Anion emission from water molecules colliding with positive ions : Identification of binary and many-body processes. In: Physical Review A. 2015 ; Vol. 91, No. 6.
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