ProjectileK-Auger-electron production by bare, one-, and two-electron ions

Abstract

Projectile E-Auger-electron production measurements were performed for the bare, one-, and two-electron ions of C, N, O, and F incident on He, Ne, Ar, and Kr gases. The measurements were taken over an energy range of 4 to 3 NIeV/amu using a cylindrical mirror analyzer. For the incident two-electron ions, single-electron capture to excited states of the I, '1s2s) S metastable component of the incident beam was the principal mechanism giving rise to the observed E-Auger transitions. For the bare and one-electron ions, double electron capture to excited states was the dominant mechanism leading to K-Auger-electron production. In addition to Auger-spectroscopy measurements, total E-Auger production cross sections were determined as well as the partial cross sections for electron capture to specific n levels of the projectile. The n distributions were also measured for double electron capture to excited states of the bare and one-electron ions.

Elastic resonant and nonresonant differential scattering of quasifree electrons fromB4+(1s)andBenis1, Zouros2, Gorczyca3 et al. 2004Phys. Rev. A3232011View full textAdd to dashboardCite

“…In the literature, RES measurements were reported for F 7+ collisions with H 2 and He targets [56]. Theoretical predictions of the KLL SDCS showed discrepancies of ϳ20% with these measurements, a value well within the ϳ30% accuracy of the metastable fraction determined from older x-ray measurements [106,107].…”

Pauli Shielding and Breakdown of Spin Statistics in Multielectron Multi-Open-Shell Dynamical Atomic Systems

“…which can be readily investigated experimentally since the initial, 1s2s 3 S, ionic core is metastable and therefore naturally found mixed-in with the ground state ions as provided by accelerators [13][14][15]. Then, the ratio R of the 1s2s2p 4 P/ 2 P ± SEC cross sections…”

Ion-Induced Auger Electron Processes in Gases

“…We only mention here (first of al I because of the rather I imited application possibil ity) another possibil ity, when the number of charge states (and so the complexity of the Auger spectrum) from which Auger emission takes place is decreased by single or double capture of target electrons by the projecti Ie ion which has no or at most one or two electrons (see e.g. Dillingham et al, 1984).…”