Ionization of water molecules by ion beams. On the relevance of dynamic screening and the influence of the description of the initial state
Language
en
Article de revue
This item was published in
Journal of Physics B: Atomic, Molecular and Optical Physics. 2014, vol. 47, p. 035203
IOP Publishing
English Abstract
Single ionization from water molecules by impact of protons, alpha particles and C6+ ions is studied. The post- and prior-versions of the continuum distorted wave-eikonal initial state (CDW-EIS) model within an independent ...Read more >
Single ionization from water molecules by impact of protons, alpha particles and C6+ ions is studied. The post- and prior-versions of the continuum distorted wave-eikonal initial state (CDW-EIS) model within an independent electron approximation are employed to compute double differential cross sections. To avoid the complexity of using numerical molecular continuum states in the cross-section calculations, effective Coulombic continuum wavefunctions are employed. However, this may lead to the appearance of post-prior discrepancies and this fact is examined in detail. Moreover, the influence of the dynamic screening on this behaviour is studied. In addition, the contribution of different molecular orbitals to the angular spectrum is analysed for several ejection electron energies. Finally, the sensitivity of CDW-EIS calculations to the representation of the initial bound molecular orbitals is investigated.Read less <
English Keywords
water
ionization
ion impact
dynamic screening
post-prior discrepancies
Origin
Hal imported